污水厂水解酸化菌和BAF池活性菌的筛选评价

Screening evaluatio of hydrolytic acidifying bacteria and active bacteria in BAF pool in sewage plant

通过对某车间水解酸化菌进行筛选,当原料水COD平均值为2620.8 mg/L时,D公司2^(#)菌所对应反应器出水COD最低,平均为2111.3 mg/L,COD去除率可达19.5%。通过对BAF菌进行筛选,考察因素和水解酸化菌一致,当原料水COD平均值为68.5 mg/L时,D公司2^(#)反应器出水COD最低,平均为73.4 mg/L。在2类菌剂的筛选过程中,均存在不同程度的污泥流失现象,且BAF反应器较水解酸化反应器严重。结合现场污泥驯化情况,建议水解酸化罐加强污泥回流和固化措施,且运行过程中污泥浓度至少保持在3776 mg/L以上。

The hydrolytic acidifying bacteria in a workshop and the active bacteria in BAF pool were screened.Thus,it is concluded that when the average COD of raw water is 2620.8 mg/L,the effluent COD of the reactor corresponding to bacteria 2^(#)of D Company is the lowest,with an average of 2111.3 mg/L,and the COD removal rate can reach 19.5%.The screening of BAF bacteria showed that the factors were consistent with those of hydrolytic acidifying bacteria.When the average COD of raw water was 68.5 mg/L,the effluent COD of the 2^(#)reactor of D Company was the lowest,with an average of 73.4 mg/L.In the screening process of the two types of bactericides,there were different degrees of sludge loss,and the BAF reactor was more serious than the hydrolysis acidification reactor.According to the situation of on-site sludge acclimation,it is suggested that the hydrolysis acidification tank should strengthen the sludge reflux and solidification measures,the sludge concentration should be kept above 3776 mg/L during operation.