中低温下ABR-HCW处理农村生活污水的效能研究

Pilot-scale Study on ABR-hybrid Constructed Wetland Process for Decentralized Domestic Sewage Treatment

在中低温条件下,研究了ABR(厌氧折流板反应器)-HCW(复合人工湿地)组合工艺对农村生活污水的处理效果。结果表明:当ABR(厌氧折流板反应器)的HRT(水力停留时间)约为5h(HCW的HLR(水力负荷)约为1.2m/d),温度为15~25℃和5~15℃时,系统对COD(化学需氧量)、NH4^+-N(氨氮)和TP(总磷)平均去除率分别为90%、74%、76%和82%、61%、86%。此外,通过增加HCW(复合人工湿地)的HRT(水力停留时间)以增强系统的脱氮能力,其效果并不明显。

The combined system of anaerobic baffled reactor add combined constructed wetland was applied to treat the rural domestic sewage under different temperature and hydraulic load rate. The results show that: The removal efficiencies of COD, NH4^+-N and TP were 90%、74% and 76% with the temperature is 15~25℃ when the HRT was 5 h in ABR and the HLR was 1.2 m/d in the combined constructed wetland. And the average of removal rates of COD, NH4+-N, and TP were: 82%、61% and 86% with the temperature is 5~15℃ when the HRT was 5 h in ABR and the HLR was 1.2 m/d in the combined constructed wetland. Meanwhile the anaerobic granular sludge in the ABR reactor had a good performance.