Evaluation of Dairy Wastewater Treatment Systems Using Carbon Footprint Analysis

Modernisation of municipal and industrial wastewater treatment plants (WWTPs) should be carried out, taking into account its impact on global warming, e.g., through carbon footprint (CF) analysis. An important sector in Poland is the dairy industry. In WWTPs, aerobic sewage sludge stabilisation applied thus far being replaced by anaerobic process. This change positive due to possibility energy production, but it unclear how affects greenhouse gases (GHG) emissions. The aim research was perform CF analysis for two scenarios WWTP operation. based real operating data current system (current scenario) project modernisation (alternative scenario). scenario consists mechanical dissolved air flotation (DAF) treatment, biological sequence batch reactors (SBRs), final farmland usage. alternative assumes replacing with a combined heat power (CHP) system. calculations were empirical models, different emission input parameters, expressed CO2 equivalents (CO2e). total 22 kg CO2e PE?1 year?1, while 45 year?1. largest share belongs emissions from WWTPs use, alternative, there addition biogas use.