硅藻土深度处理煤矿生活污水实验研究

EXPERIMENTAL STUDY ON THE DEEP TREATMENT OF COAL MINE DOMESTIC SEWAGE WITH DIATOMITE

采用硅藻土对煤矿生活污水氧化沟出水进行混凝搅拌实验,考察了硅藻土投加量、搅拌时间、搅拌速度对总氮(TN)、总磷(TP)和悬浮物(SS)去除效果的影响。结果表明,在投加量80 mg/L、搅拌速度80 r/min、搅拌时间20 min的条件下,水样沉淀后上清液TN、TP和SS浓度分别为13.23 mg/L、0.47 mg/L和1.92 mg/L,达到GB18918-2002一级A标准,TN、TP和SS去除率分别为27%、83%和88%。

Coagulation and agitation experiments were carried out for treating the oxidation ditch effluent of a coal mine domestic sewage treatment plant with diatomite. The influences of diatomite dosage, stirring time and stirring speed on the removal of TN, TP and SS were studied. The results showed that under the conditions of stirring time 20 min, stirring speed 80 r/min and diatomite dosage 80 mg/L, the concentrations of TN, TP and SS in supernatant were 13.23 mg/L, 0.47 mg/L and 1.92 mg/L, respectively, which reached the national l-A standard of GB18918-2002. The removal rates of TN, TP and SS were 27% , 83% and 88% ,respectively..