改进型人工快渗系统处理生活污水中试

Pilot Study on Improved Constructed Rapid Infiltration System for Domestic Sewages Treatment

通过改进人工快渗系统的滤料组成并进行了处理生活污水的中试。结果表明,在水力负荷1.5m/d和滤料中添加5%的大理石、15%的海绵铁条件下,该系统对废水COD、NH3-N、TP的去除率分别达到82.5%、96.1%和98.7%,出水浓度均达到了污水综合排放一级标准和中水回用标准。改进后的系统对磷的去除效果较传统快渗系统提高30%以上,磷的去除主要是海绵铁的吸附和化学固定作用,海绵铁静态吸附试验显示,其符合Langmuir吸附等温线模式。

The improvement on the fiher of constructed rapid infiltration system and administration of the pilot-scale study for treating domestic sewages was mainly concerned. The results show that on condition which hydraulic loading was 1.5 m/d and 5 % of the marble and 15 % of sponge iron added to the filter, this system reached 98.7 % to removal phosphorus of domestic sewages, while the COD and NH3-N removal rate by 82.5 % and 96.1%, all the effluent concentration meet the sewage discharge standard and recycled water standard. More than 30 % of the effective of removal phosphorus was improved by this system compared with the traditional rapid infiltration system. Sponge iron static adsorption experiments showed it fits the Langmuir adsorption isotherm model.