Covanta Solutionshttp://www.covantaenergy.co.uk/2009-03-11T09:17:16ZCovanta and the waste hierarchy: A case studyhttp://www.covantaenergy.co.uk/site/solutions/covanta-and-the-waste-hierarchy.html2009-03-11T09:17:16Z
<p> </p>
<p align="center"><img height="234" alt="Waste Hierarchy Pyramid" width="460" border="0" src="http://cm3.missiondata.com/uploads/28/Image/waste-hierarchy-pyramid.gif" /></p>
<p>Covanta works with local authorities and communities to provide tailored solutions to meet their waste disposal needs and complement local recycling efforts by generating energy from waste that cannot be sensibly recycled.</p>
<p><strong>Dublin Waste to Energy Ltd</strong></p>
<p>Covanta is the lead partner in the Dublin Waste to Energy <a href="#chp">Combined Heat and Power (CHP)</a> project to turn up to 600,000 tonnes of waste, left over after maximum recycling and <a href="#composting">composting</a> have taken place, into enough energy to generate electricity for up to 50,000 homes and district heating for up to a further 60,000 homes.</p>
<p>The Dublin Waste to Energy project will use highly efficient incineration to complement <a href="#separation">householder separation of waste at source</a> and local authority recycling and composting efforts enabling the region to meet its ambitious target of 59% recycling and reduction of landfill to 16%. In fact, the Dublin Waste to Energy plant can be classified as <a href="#recovery">recovery of resources</a> (rather than disposal) in line with the revised 1975 EU Waste Framework Directive as the plant will provide efficiencies of over 65% through the provision of electricity alone and even greater efficiencies once district heating has been added.</p>
<p style="text-align: center"><span style="background-color: #ffff00"><img height="211" width="372" alt="" src="/uploads/28/Image/Targets%20For%20Dublin%203a1.jpg" /></span></p>
<p>For each tonne of waste processed at the Dublin facility, the need to import one barrel of oil or to mine one quarter tonne of coal will be avoided, thus reducing reliance on fossil fuels in the future. The facility could also prevent up to 600,000 tonnes of carbon dioxide from entering the atmosphere each year helping to <a href="#climate">reduce waste climate change impacts</a>.</p>
<p>As part of an <a href="#integrated">integrated waste management plan</a>, Covanta will work with the four Dublin local authorities to introduce measures to encourage waste prevention, recycling, composting and increased environmental awareness within the region.</p>
<ul>
<li><a name="chp"></a><strong>Combined Heat and Power (CHP)</strong><br />
<br />
Combined Heat and Power (CHP) technology captures “waste” heat from power generation and can be used to provide hot water and district heating schemes for homes, businesses and industrial processes. Compared to the average 38% efficiency provided by old fashioned power stations, CHP can provide up to 80%efficiencies as well as lower cost heat and electricity while making a significant contribution to UK sustainable energy goals.<br />
<br />
</li>
<li><a name="separation"></a><strong>Householder separation of waste at source</strong><br />
<br />
The separation of waste by householders into different fractions at source allows optimum recycling, composting and recovery of energy from waste to take place, reducing the volume of waste sent to landfill. For example, Dublin operates a “Three Bin System” whereby waste is sorted into residual, dry recyclable and organic waste.<br />
<br />
</li>
<li><a name="recovery"></a><strong>Recovery – the fourth 'R'</strong><br />
<img height="234" alt="Waste Hierarchy Pyramid" width="460" border="0" src="/uploads/28/Image/waste-hierarchy-pyramid.gif" /><br />
After Reduce, Reuse, Recycle, the recovery of energy from residual waste is preferable to landfill disposal. Using waste as a fuel, EfW technology recovers energy from residual waste to generate clean renewable energy.<br />
<br />
The revised 1975 Waste Framework Directive was formally adopted by the EU Council on the 21 October 2008, introducing a number of significant changes to waste management rules in the EU. In particular, the Directive has reclassified ‘energy efficient’ municipal solid waste incinerators (also known as energy from waste, or EFW, plants) as waste ‘recovery’, rather than ‘disposal’, operations. The energy efficiency rate required of such plants will be 60% for existing EFW plants and 65% for new plants.<br />
<br />
</li>
<li><a name="composting"></a><strong>Composting</strong><br />
<br />
Composting uses natural biological processes to breakdown organic material to form compost. It can be carried out on a variety of scales ranging from residential compost heaps through to large centralized sites using In Vessel Composting (IVC) or Anaerobic Digestion (AD).<br />
<br />
</li>
<li><a name="invessel"></a><strong>In-Vessel Composting</strong><br />
<br />
In-Vessel Composting is a process to treat biodegradeable waste in enclosed systems (for example a drum, silo, concrete lined trench or similar) under closely controlled environmental conditions. The system usually has a mechanism to turn/mix the waste and ensure adequate aeration under controlled temperature and moisture conditions.<br />
<br />
By source separating Bio Municipal Waste into garden and kitchen wastes, biodegradeable waste can be reduced in weight by up to 50% and converted into a nutrient rich soil conditioner. Householders must, however, ensure that Bio waste is not contaminated with foreign bodies ( e.g. glass, plastic, packaging)if the compost product is to find market applications.<br />
<br />
</li>
<li><a name="digestion"></a><strong>Anaerobic Digestion</strong><br />
<br />
Anaerobic Digestion is a biological treatment process that breaks down biodegradable/ organic waste, using little or no oxygen, into compost. The biogas that is produced during this process can be used to generate electricity and heat, which can be fed back into the process. In the UK, however, AD has until recently been limited to small on farm digesters with little off-site heat or energy provision.<br />
<br />
When treating municipal waste, AD can be used to process specific source separate waste streams such as separately collected food waste, complementing recycling and the recovery of energy from residual waste.<br />
<br />
</li>
<li><a name="climate"></a><strong>How can EfW help to combat climate change?</strong><br />
<br />
According to the IPCC approximately 63% of global warming is attributable to carbon dioxide (CO2) emissions, with the majority of CO2 emissions coming from the burning of fossil fuels for energy generation and transportation. Methane ranks second to CO2 in its global warming contribution at 18%. Methane is 20 times more potent than CO2. Landfills are one of the largest sources of methane emissions, which are generated when waste is buried and then decomposes. For this reason the EU has issued a directive to limit the landfilling of biodegradable municipal solid waste to 35% of the quantity generated in 1995. <br />
<br />
EfW is a net reducer of greenhouse gas emissions because it eliminates methane from landfills and offsets the need to burn fossil fuel in power plants.<br />
<br />
</li>
<li><a name="integrated"></a><strong>Integrated waste management</strong><br />
<br />
Covanta works with local authorities to provide tailored waste management and energy solutions to local needs. Covanta constantly seeks innovative approaches to ensure that our solutions utilize the most advanced technology while delivering the most competitive cost and guaranteeing to meet landfill diversion targets.<br />
</li>
</ul> The EFW Processhttp://www.covantaenergy.co.uk/site/solutions/efw-process.html2007-11-21T08:43:55Z
<h2>A typical Covanta Energy-from-Waste facility</h2>
<br />
<img width="414" height="265" src="/uploads/11/Image/wte.gif" alt="" /><br />
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tbody>
<tr valign="top">
<td width="3%">
<p>1.<br />
2. <br />
3. <br />
4.<br />
5. <br />
6. </p>
</td>
<td width="28%">
<p>Tipping Floor<br />
RefuseHolding Pit<br />
Grapple Feed Chute<br />
Feed Chute<br />
MARTIN Stoker Grate<br />
Combustion Air Fan</p>
</td>
<td width="4%">
<p>7.<br />
8.<br />
|9.<br />
10.<br />
11.<br />
12. </p>
</td>
<td width="32%">
<p>MARTIN Ash Discharger<br />
Combustion Chamber<br />
Radiant Zone (furnace)<br />
Convection Zone<br />
Superheater<br />
Economizer</p>
</td>
<td width="5%">
<p>13.<br />
14.<br />
15.<br />
16.<br />
17.</p>
</td>
<td width="28%">
<p>Dry Gas Scrubber<br />
Baghouse<br />
Fly Ash Handling System<br />
Induced Draft Air Fan<br />
Stack </p>
</td>
</tr>
</tbody>
</table>
<font size="4"><strong>The Process</strong></font><br />
<p>After refuse collection trucks are weighed at the scalehouse and monitored for safety, they enter the tipping building and dump their waste into the storage pit. An overhead crane mixes the waste in the pit and lifts it up into a feed chute leading to the furnace. From the feed chute, waste is pushed by hydraulic ram feeders onto a stoker grate.</p>
<p>The MARTIN Reverse-Reciprocating Stoker Grate slopes downward and is composed of alternating rows of fixed and moving grate bars. The grate bars push upward against the natural downward movement of the waste. This ensures that the burning waste is continually agitated and pushed back, to serve as underfire for freshly-fed waste. A forced-draft fan supplies primary combustion air underneath the grate, and overfire air is injected through the front and rear walls of the furnace.</p>
<p>Heat from the combustion process converts water inside the steel tubes that form the furnace walls and boilers, to steam. The superheater further heats the steam before it is sent to a turbine generator to produce electricity. After passing through the boiler sections, the hot combustion gases are used to preheat boiler feedwater in the economizer.</p>
<p>While the combustion gases move through the boiler, bottom ash slowly makes its way to the end of the grate where it falls into the water quench trough of the MARTIN Ash Discharger. From the boiler, the cooled gases enter the advanced air pollution control system. Using lime slurry, the dry scrubber neutralizes any acid-forming gases, such as sulfur oxides and hydrogen chloride.</p>
<p>Particulates are captured by a high-efficiency baghouse. As the gas stream travels through these filters, more than 99 percent of particulate matter is removed. Captured fly ash particles fall into hoppers and are transported by an enclosed conveyor system to the MARTIN Ash Discharger where they are wetted to prevent dust, and mixed with the bottom ash from the grate. The ash residue is then conveyed to an enclosed building where it is loaded into covered, leak-proof trucks and taken to a landfill designed to protect against groundwater contamination. Ash residue from the furnace can be processed for removal of recyclable scrap iron.</p>
<p>All aspects of the plant's operation are monitored from a central control room 24 hours a day, seven days a week, 365 days a year.</p>
<p>Covanta operates ten different types of Energy-from-Waste technologies, representing virtually every proven system in the world including the Martin Gmbh inclined and horizntal grates technologies.</p> EfW Solutionshttp://www.covantaenergy.co.uk/site/solutions/efw.html2007-08-27T05:52:12Z
<h2>How do we do it?</h2>
<p>At our facilities, non-hazardous municipal and commercial solid waste is combusted in water-cooled furnaces at temperatures greater than 2,000 degrees Fahrenheit. The process reduces the waste to an inert ash that is only about 10% of its original volume. Additionally, all Covanta facilities use advanced air pollution control equipment and monitoring devices, which maintain strict state and federal emission standards. Many of our facilities also have wastewater treatment capabilities that make it unnecessary to discharge processed water into the local sewer system. For more information about a typical Energy-from-Waste facility, please <a href="/efw_process.shtml">click here</a>.</p>
<p>For every ton of waste processed in an EfW facility, we avoid the need to import nearly 1 barrel of oil or mine a quarter ton of coal. Annually, we process more than 15 million tons of waste, which saves this nation nearly 15 million barrels of oil.</p>
<p>We are proud of our facilities and welcome tours from interested community groups and individuals. Please call your local facility to schedule a visit.</p>
<h2>Energy-from-Waste: a proven technology worldwide</h2>
<p>Energy-from-Waste facilities process 14% of municipal solid waste in the United States, serving the disposal needs of more than 37 million people and producing enough electricity for 2.8 million homes. In Europe, Energy-from-Waste is more prevalent, and plans to construct new facilities are being prepared, due largely to the European Union's waste management directives aimed at minimizing landfills. In fact, the European Union points to energy recovery from waste as preferable to raw garbage landfills in its hierarchy of preferred waste management options. Similarly, Energy-from-Waste technology is used extensively in Japan and other Asian countries, which rely on modern Energy-from-Waste technology to generate renewable power and reduce the need for landfills. It is estimated that there are more than 600 Energy-from-Waste facilities worldwide.</p> Other Renewableshttp://www.covantaenergy.co.uk/site/solutions/other-renewables.html2007-08-27T05:52:21Z
<p><font size="4"><strong>Wood Biomass Facilities</strong> <br />
</font><br />
Covanta’s waste wood electrical generating plants include Pacific Oroville Power (18.7 MW), Mount Lassen Power (11.4 MW), Burney Mountain Power (11.4 MW) and approximately 49% ownership in Pacific Ultra-Power Chinese Station (25.6 MW). The electric power from these plants in combination provides enough power to supply approximately 67,000 homes. These plants are equipped with modern air pollution control equipment such as, electrostatic precipitators for particulate control and are monitored continuously to ensure that they meet stringent Federal and State air emissions permit limits. The electrical power from these facilities is sold to Pacific Gas and Electric Co. under a long term contract. </p>
<p>This renewable power is generated by utilizing wood fuel from a variety of sources including logging debris, logs from forest thinning, wood waste from lumber mills, highway right of way clearing, agricultural waste such as nut shells and fruit pits, and greenwaste collected from the communities we operate in. Fuel that is gathered in this way also contributes to a removal of accumulated fuel available on the forest floor and a reduction in wildfire potential. The use of this fuel and the greenwaste fuel also reduces the amount of open burning conducted in our communities which significantly reduces carbon monoxide smoke and particulates released by open burning. At Mount Lassen and Pacific Oroville Power each of these facilities receives approximately 5000 tons per year of greenwaste. Each of these facilities also receives wood waste which is diverted from landfill so that this fuel contributes to electrical generation while reducing the amount of material disposed of in landfills. </p>
<p>These renewable electric generating facilities produce numerous benefits for the communities they operate in, they diversify energy generation, reduce pollutants otherwise emitted into the air we breath, reduce fossil fuel based electric generation, and also contribute to a significant reduction in the emission of greenhouse gases. </p>
<p>
<table cellspacing="1" cellpadding="1" width="100%" align="center" summary="" border="0">
<tbody>
<tr>
<td width="60%" colspan="2">Burney Mountain Power - Burney, California </td>
</tr>
<tr>
<td width="60%">Electrical Generation Capacity</td>
<td width="40%">11.4 MW </td>
</tr>
<tr>
<td>Steam flow rating </td>
<td>105,000 lb/hr </td>
</tr>
<tr>
<td>Fuel Flow rating </td>
<td>15 tons/hr (green tons) </td>
</tr>
<tr>
<td>Heat Input rating </td>
<td>190 MMB.t.u./hr </td>
</tr>
<tr>
<td>Stack Flow </td>
<td>40,000 dscfm </td>
</tr>
<tr>
<td>Site Size: </td>
<td>40 ac. approx. </td>
</tr>
<tr>
<td># of Employees </td>
<td>19 </td>
</tr>
</tbody>
</table>
</p>
<p> </p>
<p>
<table cellspacing="1" cellpadding="1" width="100%" align="center" summary="" border="0">
<tbody>
<tr>
<td width="60%" colspan="2">Mount Lassen Power – Westwood, California </td>
</tr>
<tr>
<td width="60%">Electrical Generation Capacity </td>
<td width="40%">11.4 MW </td>
</tr>
<tr>
<td>Steam flow rating</td>
<td>105,000 lb/hr</td>
</tr>
<tr>
<td>Fuel Flow rating</td>
<td>15 tons/hr (green tons) </td>
</tr>
<tr>
<td>Heat Input rating</td>
<td>190 MMB.t.u./hr </td>
</tr>
<tr>
<td>Stack Flow</td>
<td>46,000 dscfm</td>
</tr>
<tr>
<td>Site Size:</td>
<td>60 ac. approx.</td>
</tr>
<tr>
<td># of Employees </td>
<td>19</td>
</tr>
</tbody>
</table>
<br />
<table cellspacing="1" cellpadding="1" width="100%" summary="" border="0">
<tbody>
<tr>
<td width="60%" colspan="2">Pacific Oroville Power Inc. – Oroville, California </td>
</tr>
<tr>
<td width="60%">Electrical Generation Capacity</td>
<td width="40%">18.7 MW</td>
</tr>
<tr>
<td>Steam flow rating</td>
<td>95,000 lb/hr each X(2) </td>
</tr>
<tr>
<td>Boilers</td>
<td>(2) Zurn fixed grate </td>
</tr>
<tr>
<td>Fuel Flow rating </td>
<td>28 tons/hr (green tons)</td>
</tr>
<tr>
<td>Heat Input rating</td>
<td>350 MMB.t.u./hr</td>
</tr>
<tr>
<td>Stack Flow</td>
<td>65,000 dscfm </td>
</tr>
<tr>
<td>Site Size: </td>
<td>30 ac. approx. </td>
</tr>
<tr>
<td># of Employees </td>
<td>22</td>
</tr>
</tbody>
</table>
<br />
<table cellspacing="1" cellpadding="1" width="100%" align="center" summary="" border="0">
<tbody>
<tr>
<td width="60%" colspan="2">Pacific Ultra-Power Chinese Station – Jamestown, California </td>
</tr>
<tr>
<td width="60%">Electrical Generation Capacity</td>
<td width="40%">25.6 MW </td>
</tr>
<tr>
<td>Steam flow rating</td>
<td>220,000 lb/hr</td>
</tr>
<tr>
<td>Boilers</td>
<td>1 EPI Bubbling Fluidized Bed </td>
</tr>
<tr>
<td>Fuel Flow rating</td>
<td>42 tons/hr (green tons)</td>
</tr>
<tr>
<td>Heat Input rating </td>
<td>370 MMB.t.u./hr </td>
</tr>
<tr>
<td>Stack Flow</td>
<td>102,000 dscfm </td>
</tr>
<tr>
<td>Site Size:</td>
<td>30 ac. approx.</td>
</tr>
<tr>
<td># of Employees:</td>
<td>22</td>
</tr>
</tbody>
</table>
<br />
<br />
<strong><font size="4">Biogas Products</font></strong> <br />
<br />
Subsidiaries of Covanta Holding Corporation own and operate four biogas projects in California. The projects are located on landfills owned by 3rd parties. Each project generates electric power using methane gas recovered from landfills. The projects are comprised of a “collection system” (a series of gas wells interconnected by a pipeline system) that is connected to a “conversion system” consisting of compressors and internal combustion engines that drive electric generators. The electricity generated by these projects is sold to various California utilities. <br />
<br />
Otay Project <br />
Located in San Diego County, CA <br />
Gross generation: 7.4 MW <br />
<br />
Oxnard Project <br />
Located in Ventura County, CA <br />
Gross generation: 5.6 MW <br />
<br />
Salinas Project <br />
Located in Salinas, CA <br />
Gross generation: 1.5 MW <br />
<br />
Stockton Project <br />
Located in Stockton, CA <br />
Gross generation: 0.8 MW <br />
<br />
<br />
</p> International Energyhttp://www.covantaenergy.co.uk/site/solutions/international-energy.html2009-02-04T08:06:21Z
<h2>Coal</h2>
<p>Covanta Energy not only owns and operates coal facilities, but we led the development of the Quezon Power Project-- the largest private power project in the Philippines to date. This 440-megawatt facility provides a new source of energy for the people and businesses in the Mauban Province on the Island of Luzon. Covanta Energy's other coal projects, all located in China, rely on that country's domestic coal supply, which provides dependable fuel at prices that reflect energy costs in China.</p>
<p><strong>Quezon Facility, the Philippines - 440 MW</strong><br />
The facility is a net 440 megawatts baseload pulverized coal-fired electric generation facility and an approximately 30 kilometer, 230 kilovolt (kV) transmission line and high voltage substation. It has a single boiler and turbine generator and uses sub-bituminous coal for fuel. The facility is located on an approximately 100-hectare coastal site in the Mauban Province. The transmission line extends from the facility site to a substation in Tayabas. The project was designed to meet very high seismic resistance requirements and strict environmental standards equal to those of the World Bank and the United States ExIm Bank.</p>
<p>Covanta Energy subsidiaries own 26 percent of this project and have a long-term contract to operate the facility.</p>
<p><strong>Yanjian: Taixing, Jiangsu Province, China - 24 MW</strong><br />
This facility uses pulverized coal and six boilers to generate electricity and steam. The plant commenced operation in 1995. As the facility is located in the Taixing Economic Development Zone, steam produced is supplied to customers within the region, mostly chemical plants. Covanta Energy has a 96 percent ownership in this project and assumed operations and maintenance in April 2001.</p>
<h2>Liquid Fuel</h2>
<p><strong>Samalpatti: Tamil Nadu, India - 105 MW</strong><br />
Construction began in December 1999 on Covanta Energy's first power plant in India. This project achieved the distinction of obtaining the first all-local-currency, long-term, non-recourse financing for a power project in India. Commercial operation was achieved during the first quarter of 2001. The entire electrical output is sold to the State Electricity Board. </p>
<p><strong>Madurai: Tamil Nadu, India - 105 MW</strong><br />
Construction began during the second quarter of 2000 on Covanta Energy's second power plant in India. Commercial operation began during the third quarter of 2001. The entire electrical output is sold to the State Electricity Board.</p>
<p>In some markets, such as India, heavy fuel oil (HFO)/diesel is best suited to projects because of the limited availability of other fuels that can efficiently produce power when small additional capacity is sought. In the India, Covanta Energy own and operate two projects using HFO. </p>
<h2>Natural Gas</h2>
<p>In areas where it is readily available, natural gas will likely be the fuel of choice because it is clean burning and a very efficient source of power. </p>
<p><strong>Haripur Barge: Dhaka, Bangladesh - 118 MW</strong><br />
Covanta Energy has an ownership stake and is the operator of its first barge-mounted power station. Haripur came on-line in 1999 using HFO as its fuel source and was converted to natural gas in mid-2000. Power is sold to the Bangladesh Power Development Board under a 15-year power purchase agreement. The Board is also the supplier of natural gas.</p>
<h2>Hydroelectric Projects</h2>
<p>Subsidiaries of Covanta Holding Corporation own a 50% equity interest in two run-of-river hydroelectric facilities – Koma Kolshan and Weeks Falls -- which have a combined gross generating capacity of 17 MW (Koma is a 12 MW plant; Weeks Falls is 5 MW). Both facilities are located in the State of Washington and both sell energy and capacity to a local utility under long-term energy contracts.</p> <!--Complementary technologies including MBT, Gasification and Pyrolysis-->http://www.covantaenergy.co.uk/site/solutions/complementary-technologies.html2009-03-19T10:30:59Z
<h2>Mechanical Biological Treatment (MBT), Gasification, Pyrolysis and the Covanta Solution</h2>
<p>Covanta believes that there is no "one size fits all" answer to waste management and energy generation and works with local authorities to find bespoke solutions to their waste management and energy needs while guaranteeing to meet landfill diversion targets. The Covanta solution is compatible with a range of complementary technologies including:</p>
<p><strong>Mechanical Biological Treatment (MBT)</strong><br />
MBT processes incorporate mechanical sorting and separation of the waste stream to separate the biodegradable materials, which are sent to a biological process, from the non-biodegradeable materials. MBT is often used as an umbrella term for all types of mechanical biological treatment including BMT (Biological Mechanical Treatment) systems. The difference depends on the order of the process steps e.g. mechanical sorting followed by biological digestion or vice versa. It is important to recognise that MBT systems are PRE - processes and not a means of disposal in themselves. Even after MBT has recovered recyclables and compostable fractions , there remains a role for EFW to process around 50% of inputs remaining as "Residues". This is sometimes referred to as refuse derived fuel (RDF) or secondary recovered fuel (SRF) which can be burnt on or off site.</p>
<p>MBT divides the waste mechanically into recyclables, residues and an organic fraction that can be used for composting or anaerobic digestion. BMT differs whereby biological technology is used to dry and sterilise the waste before removing non combustibles</p>
<h2>Gasification and Pyrolysis</h2>
<p>Both pyrolysis and gasification are thermal processes that turn waste into fuel by heating them under controlled conditions.</p>
<p><strong>Gasification</strong> processes occur under conditions where the quantity of air/ oxygen input is controlled so that combustion of the feedstock does not occur. As a result gasification produces a gaseous output known as 'syngas' (short for synthesis gas) and ash or slag product.</p>
<p>While there are several gasification processes being promoted for treating Municipal Solid Waste (MSW) in the UK and many Local Authorities have shown interest in gasification technology as a standalone option, so far no plant utilising gasification technology has operated on a sustained commercial basis in the UK to treat MSW. It remains a promising technology at relatively small scale and Covanta continues to monitor deployment of these facilities.</p>
<p><strong>Pyrolysis</strong> occurs under conditions where oxygen is absent or there is insufficient oxygen for gasification reactions to take place resulting in outputs that can be a mixture of solid (char), liquid (oil) and gases.</p>
<p>There are currently no UK pyrolysis plants in operation processing Municipal Solid Waste.</p>
<h2>How do Gasification and Pyrolysis differ from incineration?</h2>
<p>Whereas incineration fully converts waste into energy to be used immediately for electricity or district heating, both pyrolysis and gasification convert the waste into intermediates which can be combusted to use the heat energy immediately or be transported for use elsewhere. It is important to note however that most commercial processes use combinations of these technologies and nearly all commercial gasification systems actually follow gasification with combustion.</p> Environmental Stewardshiphttp://www.covantaenergy.co.uk/site/solutions/environmental.html2009-11-03T14:24:21Z
<p><strong><font size="4">Protecting Our Environment</font></strong></p>
<p>Environmental Stewardship and protecting our natural resources for future generations is at the core of Covanta's mission. Covanta's Environmental Policy consists of five principals:</p>
<ol>
<li><strong>Protection</strong> - We will conduct our business in an environmentally sound manner that is protective of human health and the environment.<br />
</li>
<li><strong>Compliance</strong> - We will manage our work to ensure compliance with all applicable environmental regulations and requirements.<br />
</li>
<li><strong>Conservation</strong> - We will minimize impact to the environment by encouraging pollution prevention at the source, waste minimization, facilitating use of recycling opportunities and responsible disposal of any production by-products.<br />
</li>
<li><strong>Qualification</strong> - We will ensure that all employees have the necessary information, resources and training to make informed environmental decisions.<br />
</li>
<li><strong>Commitment</strong> - Covanta is committed to be an industry leader in environmental protection by achieving superior awareness and performance through a process of continuous improvement.</li>
</ol>
<p>Energy-from-Waste is the most responsible means of solid waste disposal. It reduces the volume of waste which must ultimately be disposed of in an environmentally-friendly manner, generates valuable renewable energy, and results in a net reduction of greenhouse gas emissions when compared to conventional landfilling practices. According to the US Environmental Protection Agency, Energy-from-Waste facilities generate power "with less environmental impact than almost any other source of electricity." </p>
<p>All of Covanta's domestic facilities are "renewable", using municipal solid waste, landfill gas, wood and hydro power to generate electricity while reducing our dependence on fossil fuels. For example, Covanta processes approximately 20 million tons of municipal solid waste each year conserving more than 25,000,000 cubic yards of landfill space and generating 9,000,000 megawatt hours of electricity, the equivalent of burning 3.5 million tons of coal. All of Covanta's Energy-from-Waste projects feature state-of-the-art air pollution controls that meet EPA Maximum Achievable Control Technology (MACT) standards.</p>
<div>Covanta's efforts in pursuing environmental excellence are exemplified by the following accomplishments:</div>
<ul>
<li>Covanta Alexandria admitted to the Virginia Environmental Excellence Program (2006)</li>
<li>Covanta Haverhill admitted to EPA's National Environmental Performance Track program (2006)</li>
<li>Covanta Hempstead received EPA Performance Track Outreach Award (2004); received ASME Large Waste-to-Energy Facility of the Year (2005)</li>
<li>Covanta Honolulu received the KOA Community Environmental Achievement Award (2003)</li>
<li>Covanta Kent received the Michigan Clean Corporate Citizen designation (2006)</li>
<li>Covanta Lake received the Council for Sustainable Florida's "Sustainable Florida Promising Practices for Outstanding Achievement" award (2003)</li>
<li>Covanta Mid-Connecticut admitted to EPA's National Environmental Performance Track program (2004); EPA New England Environmental Merit Award (2005)</li>
<li>Covanta Montgomery received the SWANA Waste-to-Energy Excellence Award (2005)</li>
<li>Covanta SECONN admitted to EPA's National Environmental Performance Track program (2005); received EPA Environmental Merit Award (2005)</li>
<li>Covanta SEMASS admitted to EPA's National Environmental Performance Track program (2005)</li>
</ul> Covanta Facilitieshttp://www.covantaenergy.co.uk/site/solutions/our-facilities.html2009-11-03T14:25:07Z
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<p>As a world premier operator of large-scale Energy-from-Waste (EfW) or waste-to-energy (WTE) facilities, Covanta Energy is proud to offer an environmentally sound solution to communities' solid waste disposal needs. With over 40 facilities, Covanta Energy uses municipal solid waste as a fuel to generate renewable energy. Our modern EfW facilities are located in the following states:</p>
<p><a target="_blank" href="http://www.covantaholding.com/site/solutions/our-facilities.html">Click here to view our list of facilities</a>.</p>
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</table> Martin GmbHhttp://www.covantaenergy.co.uk/site/solutions/martin.html2007-08-27T05:52:21Z
<p align="center"><strong><font size="3">The MARTIN® System <br />
Technology for Thermal Waste Treatment</font></strong> </p>
<p>Around the world, plants employing the MARTIN® System rank among the most up-to-date facilities for energy recovery through thermal waste treatment. In developing and designing the MARTIN® Reverse Acting Stoker Grate, Martin successfully applied modern process engineering to the combustion of high-ash and high-moisture fuels such as municipal and commercial refuse.</p>
<p>MARTIN® System plants are characterized by high reliability, high energy efficiency and low emissions owing to modern combustion technology and highly effective flue gas cleaning systems. The plants are designed in accordance with the most recent state-of-the-art technology for power plant, combustion and environmental control engineering.</p>
<p>The MARTIN® Reverse Acting Stoker is the heart of the MARTIN® System for thermal waste treatment. The Reverse Acting Stoker is sloped downward from the feeder end towards the residue discharge end and is comprised of fixed and moving grate steps. The moving grate steps perform slow stirring strokes against the grate slope. This ensures that the burning refuse layer is continually rotated and mingled to form an even depth of bed, and red hot mass is pushed back to the feeder end of the grate. Thus intense fire builds up at the front end of the grate, with all combustion phases (such as drying, ingnition and combustion itself) taking place simultaneously and passing into one another.</p>
<p>In longitudinal direction, the Reverse Acting Stoker grate is subdivided into several zones which are individually supplied with primary combustion air. The air flow to these zones is adjusted to the needs of the combustion process by computer control.</p>
<p>The grate bars are made from wear-resistant and heat-proof cast steel with high chromium content. The primary air flows through the grate bars and via narrow air gaps between heads of adjacent grate bars into the burning refuse layer. This system forms a high air resistance thus ensuring uni­form distribution of the combustion air over the surface of each grate zone.</p>
<p>Secondary combustion air injected at high pressure at the front and rear wails of the combustion chamber provides intense mixing, turbulence and burn-out of the more than 1,0000C (1,8300F) hot combustion gases above the burning refuse layer.</p>
<p>Burned-out combustion residues are transferred by a slowly rotating roller at the grate discharge end into the MARTIN® Residue Discharger where they are quenched and discharged.</p>
<p>To learn more about MARTIN®, please visit <a target="_blank" href="http://www.martingmbh.de">http://www.martingmbh.de</a></p> Covanta Secure Serviceshttp://www.covantaenergy.co.uk/site/solutions/covanta-secure.html2007-08-27T05:52:17Z
Covanta Secure Services manages the destruction of:<br />
<br />
<strong>Pharmaceutical and Commodity Wastes</strong><br />
<br />
Secure disposal prevents contaminated, expired, or off-specification products from being remarketed by making certain that they are permanently destroyed, protecting your trademarks, patents, and reputation.<br />
<br />
Covanta Secure Services provides guaranteed, secure disposal of off-specification and expired pharmaceutical and consumer products including: <br />
<br />
Creams, lotions, and ointments<br />
Pills and powders <br />
Syrups, vitamins and dietary supplements <br />
Food products <br />
Healthcare products <br />
Cosmetics <br />
Toys <br />
<br />
Products are completely destroyed by means of our high-heat combustion process. You witness the destruction process - which provides an added level of assurance. Covanta Energy also offers a Certificate of Destruction.<br />
<br />
<strong>Manufacturing Wastes</strong><br />
<br />
Secure disposal eliminates the risks associated with disposing of wastes in landfills. Covanta Energy can manage the disposal of a variety of non-hazardous manufacturing wastes including:<br />
<br />
Oily debris<br />
Process residues <br />
Filter media <br />
Rags, and absorbent pads <br />
Trimmings, cuttings, and mis-runs <br />
Plastic, wood, and cardboard <br />
Packaging and packaging foams <br />
<br />
<strong>Sensitive and Confidential Documents</strong><br />
<br />
When privacy and confidentiality are at stake, secure disposal prevents others from accessing sensitive information about employees, finances or business practices, whether it's on paper, magnetic media or CD-ROM. When Covanta Energy is contracted to dispose of confidential data, our high-heat combustion technology ensures complete destruction. For added security, you may even request that your company's representative witness the destruction process.<br />
<br />
Covanta Energy provides safe, secure and confidential destruction of:<br />
<br />
paper <br />
cardboard <br />
three-ring binders <br />
magnetic media <br />
optical media <br />
plastic <br />
packaging materials & labels <br />
<br />
Covanta Energy had provided document destruction for hundreds of large corporations and small businesses, as well as federal, state, and local government and law enforcement agencies. You can rely on our guaranteed destruction process and secure waste disposal methods to ensure the destruction of confidential information and trade secrets.<br />
<br />
All materials are destroyed at one of our energy-from-waste facilities by incineration at temperatures in excess of 1,800 degrees Fahrenheit, hot enough to prevent harmful air emissions and to ensure that the resulting ash is completely inert. We are experts in the safe and secure handling of waste materials and sensitive documents and the disposal of the inert ash into which we convert them. <br />
<br />
Covanta Secure Services offers clients:<br />
<br />
The assurance of complete confidentiality<br />
Guaranteed security of all materials prior to destruction<br />
Witnessed and certified destruction<br />
Strict environmental compliance<br />
A nationwide network of facilities<br />
Control over potential gray market resale of materials<br />
<br />
<br />
We believe that doing business with Covanta Secure Services is smart business. Our rigorous environmental and safety review procedures are the best business approach to managing your secure disposal needs. Whether you are looking for secure disposal to protect your product from security risk, or assured destruction to minimize your future environmental liability, our careful and deliberate approach is the best choice for secure waste disposal.<br />
<br />
The Covanta Secure Services Customer Center has everything you need to complete the review and approval process. We ensure that you are completely involved with profiling and characterizing all of your material and our Customer Representatives and Environmental, Health and Safety Representatives are readily available to assist you along the way. Linkshttp://www.covantaenergy.co.uk/site/solutions/links.html2007-08-27T05:52:18Z
<p class="maintext"><u><strong>Links to Associated Sites</strong></u></p>
<p class="maintext"><a target="_blank" href="http://www.seas.columbia.edu/earth/wtert"><img height="90" alt="" width="111" align="right" border="0" src="/uploads/11/Image/1127504773926.jpg" /></a>The <a target="_blank" href="http://www.seas.columbia.edu/earth/wtert">Waste-to-Energy Research and Technology (WTERT)</a> Council is a top-tier technical group that brings together engineers, scientists and officials from industry, academies, and government around the world in the effort to increase the recovery of materials and energy from waste and reduce the environmental impacts of waste disposal. In particular, the mission of the WTERT Council is to advance both the economic and environmental performance of WTE technologies in the U.S and worldwide. </p>
<p class="maintext"> </p>
<p class="maintext"><a target="_blank" href="http://www.wte.org/"><img height="90" alt="" align="left" border="0" src="/uploads/11/Image/1127942872017.gif" /></a>The <a target="_blank" href="http://www.wte.org/">Integrated Waste Services Association (IWSA)</a> promotes integrated solutions to municipal solid waste management. IWSA strives to encourage the use of waste-to-energy technology as a key component of community solid waste programs.</p>
<p class="maintext"> </p>
<p class="maintext"><a target="_blank" href="http://www.climateregistry.org"><img height="104" alt="" width="110" align="right" border="0" src="/uploads/11/Image/CCAR-logo.jpg" /></a>Covanta is a member of the <a target="_blank" href="http://www.climateregistry.org">California Climate Action Registry</a>, a distinguished group of organizations demonstrating leadership by voluntarily taking action on climate change. The Climate Action Registry is working to reach a 30 percent reduction in greenhouse gases by 2020 and has recognized biomass energy and Energy-from-Waste as valuable resources for achieving this goal. </p> Videohttp://www.covantaenergy.co.uk/site/solutions/video.html2007-08-27T05:52:22Z
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<p><span class="as_title">Welcome to the Covanta Secure Services Video Library</span> </p>
<p>Below are three links to Covanta Secure Services videos that will explain how Covanta Secure Services can help you manage your non-hazardous waste materials. Covanta Secure Services can manage most non-hazardous materials at our Nationwide Network of Waste-to-Energy facilities and in the process, we generate Renewable Energy from your waste.</p>
<p>If you have technical challenges viewing these videos, please email <a href="mailto:secureanswers@covantaenergy.com">secureanswers@covantaenergy.com</a> and request a copy of our NEW DVD.</p>
<p class="callout">All videos require the Apple Quicktime plugin. If needed, you may download the plugin <a href="http://www.apple.com/quicktime">here</a>.</p>
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<h3>Video - Non-Hazardous Special Waste Program</h3>
<img style="MARGIN-RIGHT: 12px" height="85" alt="" width="150" align="left" src="/uploads/11/Image/video_non-hazardous.jpg" /> <strong>Play Time: 8:41</strong><br />
<a href="javascript:createPopup('/video_non-hazardous.html')"><img alt="Watch Video" vspace="5" border="0" src="/uploads/11/Image/1166737539141.gif" /></a> </div>
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<h3>Video - Assured Destruction Service</h3>
<img style="MARGIN-RIGHT: 12px" height="85" alt="" width="150" align="left" src="/uploads/11/Image/video_assured-destruction.jpg" /> <strong>Play Time: 3:37</strong><br />
<a href="javascript:createPopup('/video_assured-destruction.html')"><img alt="Watch Video" vspace="5" border="0" src="/uploads/11/Image/1166737539141.gif" /></a> </div>
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<h3>Video - Covanta Niagara Offers Shredding Service</h3>
<img style="MARGIN-RIGHT: 12px" height="85" alt="" width="150" align="left" src="/uploads/11/Image/video_covanta-niagara.jpg" /> <strong>Play Time: 1:44</strong><br />
<a href="javascript:createPopup('/video_covanta-niagara.html')"><img alt="Watch Video" vspace="5" border="0" src="/uploads/11/Image/1166737539141.gif" /></a> </div>
28<h2>Coal</h2>
<p>Covanta Energy not only owns and operates coal facilities, but we led the development of the Quezon Power Project-- the largest private power project in the Philippines to date. This 440-megawatt facility provides a new source of energy for the people and businesses in the Mauban Province on the Island of Luzon. Covanta Energy's other coal projects, all located in China, rely on that country's domestic coal supply, which provides dependable fuel at prices that reflect energy costs in China.</p>
<p><strong>Quezon Facility, the Philippines - 440 MW</strong><br />
The facility is a net 440 megawatts baseload pulverized coal-fired electric generation facility and an approximately 30 kilometer, 230 kilovolt (kV) transmission line and high voltage substation. It has a single boiler and turbine generator and uses sub-bituminous coal for fuel. The facility is located on an approximately 100-hectare coastal site in the Mauban Province. The transmission line extends from the facility site to a substation in Tayabas. The project was designed to meet very high seismic resistance requirements and strict environmental standards equal to those of the World Bank and the United States ExIm Bank.</p>
<p>Covanta Energy subsidiaries own 26 percent of this project and have a long-term contract to operate the facility.</p>
<p><strong>Yanjian: Taixing, Jiangsu Province, China - 24 MW</strong><br />
This facility uses pulverized coal and six boilers to generate electricity and steam. The plant commenced operation in 1995. As the facility is located in the Taixing Economic Development Zone, steam produced is supplied to customers within the region, mostly chemical plants. Covanta Energy has a 96 percent ownership in this project and assumed operations and maintenance in April 2001.</p>
<h2>Liquid Fuel</h2>
<p><strong>Samalpatti: Tamil Nadu, India - 105 MW</strong><br />
Construction began in December 1999 on Covanta Energy's first power plant in India. This project achieved the distinction of obtaining the first all-local-currency, long-term, non-recourse financing for a power project in India. Commercial operation was achieved during the first quarter of 2001. The entire electrical output is sold to the State Electricity Board. </p>
<p><strong>Madurai: Tamil Nadu, India - 105 MW</strong><br />
Construction began during the second quarter of 2000 on Covanta Energy's second power plant in India. Commercial operation began during the third quarter of 2001. The entire electrical output is sold to the State Electricity Board.</p>
<p>In some markets, such as India, heavy fuel oil (HFO)/diesel is best suited to projects because of the limited availability of other fuels that can efficiently produce power when small additional capacity is sought. In the India, Covanta Energy own and operate two projects using HFO. </p>
<h2>Natural Gas</h2>
<p>In areas where it is readily available, natural gas will likely be the fuel of choice because it is clean burning and a very efficient source of power. </p>
<p><strong>Haripur Barge: Dhaka, Bangladesh - 118 MW</strong><br />
Covanta Energy has an ownership stake and is the operator of its first barge-mounted power station. Haripur came on-line in 1999 using HFO as its fuel source and was converted to natural gas in mid-2000. Power is sold to the Bangladesh Power Development Board under a 15-year power purchase agreement. The Board is also the supplier of natural gas.</p>
<h2>Hydroelectric Projects</h2>
<p>Subsidiaries of Covanta Holding Corporation own a 50% equity interest in two run-of-river hydroelectric facilities – Koma Kolshan and Weeks Falls -- which have a combined gross generating capacity of 17 MW (Koma is a 12 MW plant; Weeks Falls is 5 MW). Both facilities are located in the State of Washington and both sell energy and capacity to a local utility under long-term energy contracts.</p>1902/uploads/11/Image/header/conventional-facilities.jpg15international-energytruetrue
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International Energy2009-02-04T08:06:21-05:00