化学强化一级处理-人工湿地处理生活污水效果

Effectiveness of Integrated Chemically Enhanced Primary Treatment and Constructed Wetland for Treating Domestic Wastewater

为解决传统的污水二级生化处理工艺运行成本较高问题并满足日趋增长的小城镇污水处理实际需要,开展了粉煤灰基混凝剂化学强化一级处理—潜流式人工湿地(CEPT-SFCW)系统处理生活污水的实验研究。结果表明,在人工湿地负荷率为0.05～0.1m3/(m·2d)的条件下,CEPT-SFCW系统对COD的去除率>85%。同时,CEPT-SFCW系统对总磷的去除率很高,虽然在进水含磷量低时人工湿地会发生磷释放的现象,出水中磷浓度仍可达到GB8978-1996中的二级排放标准。该系统对氨氮去除效率较低,最高可达到10%,去除效果与植物的生长状态有关。

Based on the lab scale experiment,this paper studies the effectiveness of an integrated sewage treatment system of constructed wetland process with chemically enhanced primary treatment as the pre-treatment,particular concerns being given to testing a self-prepared low-cost substitute coagulant.The system as a whole can remove more than 85% of COD and a pretty more TP,but poor in removing of NH3-N about 10%,depending on growth of the plant in the wetland.