复合人工湿地处理生活污水的效果

目的]对湿地污水处理技术的工艺参数进行改进和系统优化。方法]通过改变传统间歇进水对人工湿地增氧的方式,将两个垂直流人工湿地串联,在好氧湿地内增加曝气供氧,使好氧湿地内溶解氧保持在3～4 mg/L,从回流比角度出发,考察了不同回流比（0、1∶1、2∶1、3∶1、5∶1）对复合人工强化湿地处理效果的影响。结果]复合垂直流人工湿地对COD、NH3-N、TN的去除效果均可达到污水排放一级A的标准,其中不同回流比对TN的去除影响效果很大,当回流比达到2∶1时,去除效果最好,去除率可达82.5%;但试验装置对TP的去除效果较差,可从湿地基质选材的角度考虑,选取吸附能力较强的填料作为湿地基质,加强对污水中磷的去除效果。结论]垂直流人工湿地对生活污水的处理有较好的应用前景。

Research on the Wastewater Treatment in Artificial Construction Wetland

Objective] The technical parameter in the system of the wastewater treatment in artificial construction wetland was improved for its optimization.Method] The way of the oxygen-adding through the traditional method of intermittent water-inletting was improved with the hang through the wetland oxygen on the series of two vertical-flowing wetlands.The content of dissolved oxygen within the aerobic wetland remained in the range of 3-4 mg/L by means of the technique of aerating oxygen.The effect of different r...