关键词: 污水处理, 升级改造, BioWin, TN, 出水水质, 三峡库区

Abstract: In order to make effluent quality of some sewage treatment plants in the Three Gorges Reservoir Area to conform the national standard,a mathematical model of sewage treatment process of Mudong Town sewage treatment plant was established by BioWin software.Then,operation status of the sewage treatment plant was evaluated and some improving schemes were proposed.The results showed that:(1)BioWin software could be used to simulate actual process status of sewage treatment plants.(2)Low removal efficiency of TN was related to inadequate denitrification that resulted from lacking carbon source.(3)If not changing other processes,the TN removal efficiency could be increased by 11.66%,and the effluent quality reached Grade I-A Discharge Standard from Grade I-B after increasing the internal reflux from 3 900 m3/d to 14 000 m3/d in the sewage treatment plant.

Key words: sewage treatment, upgrade, BioWin, TN, effluent quality, Three Gorges Reservoir Area;