洱海流域分散式农村生活污水处理设施除污效率调查研究

调查分析了洱海周边已建成正在运转的未添加悬浮球和添加悬浮球的2种农村分散式污水设施处理污水效率。结果表明,在常温下和水力停留时间为3 d的条件下,未添加悬浮球和添加悬浮球的2种装置对农村生活污水中CODCr平均去除率分别为57.3%和56.2%,TN平均去除率分别为16.9%和20.9%,TP平均去除率分别为24.9%和51.0%,NH4-N的平均去除率分别为11.8%和11.4%;添加悬浮球的污水处理装置比未加悬浮球的污水处理装置净化污水能力无明显提高,2种处理装置出水水质均易受进水水质影响。

Research on the Efficiency of Decentralized Rural Domestic Sewage Treatment in Erhai Lake

The efficiency of two already-built types of decentralized rural domestic sewage treatment dosed with and without hollow-sphere fillings was investigated around Erhai lake.As indicated by the results,under room temperature and 3 d of hydraulic retention period,the average removal efficiency of CODCr in rural domestic sewage by the two types of treatment dosed without and with hollow-sphere fillings was 57.3% and 56.2%,respectively;the average removal efficiency of TN was 16.9% and 20.9%,that of TP was 24.9% and 51.0%,and that of NH4+-N was 11.8% and 11.4%;the treatment dosed with hollow-sphere fillings was not obviously better than that without fillings,the quality of effluent water under both two types of treatment was largely influenced by that of influent water.