Applying fuzzy synthesized assessment to energy consumption of oxidation ditch
模糊综合评价在氧化沟能耗评价中的应用

Based on the data of four wastewater treatment plants(WWTPs) in Tai Hu watershed,the energy consumption per ton of wastewater(E),the installed capacity of biochemical treatment process(η),the removal volume of COD(ΔCOD),the removal volume of NH3-N(ΔNH3-N) and the removal volume of TP(ΔTP) were chosen as indices for evaluating the energy consumption of the WWTP.Fuzzy synthesized assessment was adopted to quantitatively evaluate the energy consumption level.The energy consumption levels of A,B,C and D WWTP were level 2,level 3,level 3,and level 5,respectively.The energy consumption level of WWTP varied directly with the grade.