Energy Consumption in Wastewater Treatment Plants

In 2020, the energy consumption and volumes of treated wastewater in four village wastewater treatment plants WTP (with a capacity below $10,000 m^{3}/$month), were monitored monthly. The acquired data showed that the specific energy consumption at the investigated WTP (depending on the period and location) was between 1.561 and $2.580 kWh/m^{3}$ treated wastewater, the annual averages being between 1.786 and $2.334 kWh/m^{3}$ (depending on WTP). Moreover, the consumption given by the equipment related to the biological treatment lines BgT primarily determines the total energy consumption in the WTP-the average annual values of the BgT share in the total energy consumption of the investigated WTP were between 0.632 and 0.729. These findings conclude that the WTP energy efficiency improvement is possible primarily by streamlining aerobic and anaerobic biological treatments.