硅藻土强化A^2/O工艺处理生活污水的试验研究  

Treatment of Domestic Sewage by Diatomite-A^2/O Process

作　　者：崔俊蕊 张小燕[1] 姜博 刘俊良[1] 

机构地区：[1]河北农业大学城乡建设学院,河北保定071001 [2]中铁十五局集团第七工程有限公司,河南洛阳471000

出　　处：《中国给水排水》2015年第9期93-95,共3页China Water & Wastewater

摘　　要：采用硅藻土强化A2/O工艺处理生活污水,分别研究了硅藻土单独处理污水的最佳投量范围、A2/O工艺的最佳运行条件和硅藻土强化A2/O工艺的最佳投量。结果表明,硅藻土单独处理污水的最佳投量范围为20~30 mg/L;A2/O工艺最佳的水力停留时间(HRT)为8 h,好氧池DO为2~3 mg/L,混合液回流比为250%;硅藻土强化A2/O工艺的硅藻土最适投加量为25 mg/L。硅藻土强化A2/O工艺对COD、NH+4-N和TP的去除率分别稳定在90%、81%、92%,出水水质基本达到国家一级A排放标准。The diatomite - A2/O process was used to treat domestic sewage. The optimal dosage of diatomite for single sewage treatment, the optimal operating conditions of A2/O process and the optimal dosage of diatomite in diatomite - A2/O process were studied respectively. The resuhs showed that the best dosage range of diatomite for single sewage treatment was 20 to 30 mg/L. The optimal HRT, DO and mixed liquor reflux ratio of A2/O process were 8 h, 2 to 3 mg/L and 250% respectively. The optimal dosage of diatomite in diatomite - A2/O process was 25 mg/L. The removal rates of COD, NH4＋ - N and TP were 90%, 81% and 92% respectively. The effluent quality met the first level A criteria in the na- tional wastewater discharge standard.

关 键 词：硅藻土 A2/O工艺 生活污水 强化处理 

分 类 号：X799.3[环境科学与工程—环境工程]