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4. Thermal elimination techniques
These techniques cover all processes that degrade all or part of the sludge's organic matter. They are therefore preferentially applied to carbon-rich organic sludge.
However, predominantly mineral sludge can be "burnt" in the presence of fuel to reduce its residual organic fraction, its water content or to concentrate its pollutants.
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Thermal oxidation can take place in the gaseous phase, at high temperature (above 850°C according to regulations) with excess air, and is then referred to as "incineration". This can take place :
in a specific incinerator located on the treatment plant site ("solo" incineration), a solution to be adopted for large tonnages, at least of the order of ten t MS/d ;
in an off-site incinerator, i.e. co-incinerated...
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Thermal elimination techniques
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Bibliography
Norms and Standards
- Sludge testing – Determination of characteristics in relation to suitability for concentration (T 97-001). - NF T 97-001 – 11-79 - Nov 1979
- Sludge characterization – Determination of dry matter and water content. - NF- EN 12880 - Nov 2000
- Sludge characterization – Sludge recovery and disposal – Vocabulary. - NF EN 12832 - Nov 1999
- Organic amendments – Composts containing materials of agronomic...
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U.S. Environmental Protection Agency:
Regulations
Waste and product spreading :
Spreading of sludge from wastewater treatment. – Decree n° 97-1133 of December 8, 1997, NOR : ATEE970078D.
Prescriptions techniques applicables aux épandages de boues sur les sols agricoles. - Arrêté du 08/01/1998, NOR : ATEE970538A.
Landfill :
European Directive 1999/31/EC of April 26, 1999 "Landfill...
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