A Decision Tool to Assess Greenhouse Gases of Sewage Sludge Treatment and Disposal Routes

Sewage sludge production increases continuously reaching almost 20% (946 700 t 1 118 795 tons of dry matters in 2007) during the (directly or after composting). The remaining 30% was incinerated (with or without household wastes) or landfilled. Nowadays, sludge reduction is a major concern. This activity has to becom be careful to the environmental impacts of sludge treatment and disposal routes. To help stakeholders in that way, we developed a decision tool called "Bilan Carbone" method (ADEME 2009) (plant manager, public administration...) to quantify greenhouse gases (GHG) for each type of emissions and each process of sludge treatment and disposal routes