A STUDY ON RESOURCE AND ENERGY CIRCULATION BASE FOR SEWAGE TREATMENT PLANT BY WIDE AREA COOPERATION.

Abstract

 Using sewage treatment plant simulator, we comprehensively evaluated energy saving, energy production, and phosphorus recovery for the resource and energy circulation base of the sewage treatment plant by wide area cooperation at the model area. For cooperation of domestic wastewater treatment facilities, the agricultural rural sewage treatment facility set up with sewerage connection was the most effective. In the case of A treatment plant, rural sewage treatment facility accounted for 16% of the total power generation of 19,430kWh / day, and the power generation increased about 30%. Phosphorus from three treatment plants was collected in the B treatment plant, therfore the phosphorus recovery amount was 159 kg / day, which was 1.7 times that of the B treatment plant alone(94 kg / day). In the view point of an energy circulation, considering the B treatment plant as the energy base of the three treatment plants, the effect of the digestion gas transportation was large, and the self-sufficiency rate increased to be 82%. Furthermore, in cooperation with the domestic wastewater treatment facilities, the amount of power generation increased to 19,200kWh / day, and it is estimated that the self-sufficiency rate was 104% and power independence is possible.