|
(T/MC257) Life cycle inventory for municipal sludge management. Feijoo, Gumersindo1, Hospido, Almudena1, Omil, Francisco 1, Fernández-Couto, Mercedes2, Moreira, Mª Teresa1, 1 2 ABSTRACT- One of the most important problems to solve in municipal wastewater treatment is the management of the generated sludge. Satisfactory treatment and disposal of the sludge can be the single most complex and costly operation in a municipal wastewater treatment system. The idea of the study was to generate quantitative LCI information for the post-treatment of these solids. The inventory comprises the energy consumption, emissions to air, reduction of the toxicity, concentration of organic matter and heavy metals. They were considered diverse scenarios: a) Drying and incineration with and without energy recovery; b) Sludge stabilisation by anaerobic digestion or aerobic treatment (compostage) and their use in agricultural as well as in the recovery of refuse dumps and c) disposal by sanitary landfill. Key words: sludge treatment, life cycle inventory, incineration, sludge stabilization |
