低能耗组合工艺处理小城镇污水的中试研究

Pilot-scale Study on Small Town Wastewater Treatment by Low Energy Combined Process

开发中小城镇适用的简易高效污水处理成套技术,解决城镇污水处理厂的三高问题,这对于污染严重、资源短缺、经济尚不够发达的我国,在一段时期内具有重要意义。在城市污水处理厂建立了改进型膨胀颗粒污泥床(EGSB)+接触氧化组合中试工艺处理城市污水,在组合工艺停留时间为8h时,出水COD、氨氮、SS都能够达到城市污水二级排放标准。水力停留时间对组合工艺出水中的氨氮、SS去除效果影响明显,随着水力停留时间的提高,出水中的氨氮、SS下降。当处理量为1000t/d时,对该组合工艺的能耗进行了计算,吨水能耗为0.13元,为传统城镇污水处理吨水能耗的55%左右。

A combined process of EGSB improved with contact oxidation was built in wastewater treatment plant.The effluent of CODcr,ammonia nitrogen and SS can meet the criteria of Class II when HRT was 8h.As the treatment capacity was 1000t/d,the energy consumption was about 0.13yuan/ton,which only covered 55% of traditional municipal wastewater treatment process.