间歇曝气折流BAF处理小城镇生活污水的效能研究

在间歇曝气运行方式下对折流曝气生物滤池(BBAF)处理小城镇生活污水的效能进行了研究,考察了曝气/停曝时间对处理效果的影响.结果表明,在气水比为8:1、曝气/停曝时间分别为1.5 h/1 h和1.25 h/1.25 h的条件下,当进水COD为53～275 mg/L、TN为16.83～47.68 mg/L、TP为1.58～3.75 mg/L时,出水水质均能满足<城镇污水处理厂污染物排放标准>(GB 18918--2002)的一级B标准.曝气/停曝时间为1.25 h/1.25 h相对节能,可作为今后运行的主要工况.

Efficiency of Intermittent Baffled Biological Aerated Filter for Domestic Sewage Treatment in Small Towns

The efficiency of baffled biological aerated filter (BBAF) under intermittent aeration mode for domestic sewage treatment in small towns was studied, and the influence of aeration time/non-aeration time on the treatment effect was investigated. The results show that under the conditions of air/ wastewater ratio of 8 : 1, aeration time/non-aeration time of 1.5 h/1 h and 1.25 h/1.25 h, and when the influent COD, TN and TP are 53 to 275 mg/L, 16.83 to 47.68 mg/L and 1.58 to 3.75 mg/L re-spectively, the effluent quality can meet the first level B criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918 - 2002). The aeration time/non-aeration time of 1.25 h/1.25 h saves energy relatively, and it can be used as main running condition.