Estimation of Energy Recovery Potential from Primary Residues of Four Municipal Wastewater Treatment Plants

Wastewater treatment plants have been traditionally developed for the aerobic degradation of effluent organic matter, and are associated with high energy consumption. The adoption sustainable development targets favors utilization every available source, current work aims at identification biomethane potential from non-conventional sources derived municipal wastewater processes. Byproducts primary process stage were collected four sewage in Greece great variation design capacity servicing areas wide human activities, affecting quality influents corresponding wastes. samples characterized determination their solids fats content, as well concentration leached matter nutrients, subjected to anaerobic digestion measurement production according standardized procedures. All exhibited biogas utilization, screenings a plant receiving an area combined rural agro-industrial activities presenting highest potential. Nevertheless, these had methanogens doubling time around 1.3 days, while high-capacity unit proved less than 1 day. On other hand, floatings grit chambers presented smallest utilization. wastes can be utilized production, potentially secondary sludge co-digestion units, converting demanding zero or even power process.