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In recent years, there has been increasing talk of improving energy efficiency and the ability to reduce greenhouse gases in wastewater treatment plants. This necessitates exploring the possibilities for reducing energy costs and the possibilities for obtaining energy from wastewater. In the present study, an analysis of the energy consumed at different stages of wastewater treatment in a municipal WWTP in the Republic of Bulgaria is made, and the average monthly consumption of electricity required for the treatment of one cubic meter of wastewater is estimated. Based on the collected and analyzed data, an assessment was made of the possibilities for energy recovery from dry matter from sludge, by combustion and anaerobic digestion. The obtained results allow for the reconstruction of a facility and the use of the hitherto unused energy potential contained in the sludge. |
