水解酸化集成D-A^2O处理校园生活污水研究

D-A^2O Combined with Hydrolytic Acidification for Treatment of Campus Domestic Sewage

设计了总体积为439 L的水解酸化集成D-A2O反应器一体化污水处理装置,并进行了为期9个月的校园生活污水处理小试。结果表明,经水解酸化段后,厌氧池进水端挥发性脂肪酸(VFA)的含量大幅提高;系统最佳水力停留时间(HRT)为6 h;最佳混合液回流比(R)、污泥回流比(r)分别为220%、90%;两系列厌氧/缺氧交替运行时间(DAOT)为1 h。控制系统于最佳工况下运行,其对COD、TN、NH+4-N、TP的平均去除率分别可高达90.60%、86.50%、92.37%、88.34%,系统出水水质较好且稳定达到一级A标准。

A D-A^2O combined with hydrolytic acidification tank with total volume of 439 L was de signed and operated to treat campus domestic sewage for a period of nine months. The trial results showed that the volatile fatty acids （VFA） content in the effluent of hydrolysis acidification tank was increased obviously. The optimal hydraulic retention time （HRT） of the system was 6 h. The optimal mixture reflux ratio （R） and sludge recycle ratio （r） were 220% and 90% respectively. The double anaerobic/anoxic alternative operation time （DAOT） was 1 h. Under these conditions, the average removal rates of COD, TN, NH4＋- N and TP were up to 90.60% , 86.50% , 92.37% and 88.34% respectively. The effluent quality reached the first level A standard.