稳定表流湿地中污泥的形成及除污效果

Sludge formation and decontamination effect of stable surface flow wetland systems

探讨了温度、植物及不同湿地流态对稳定表流人工湿地中污泥的形成和组成的影响,并考察了湿地在污泥形成过程中的除污效果。结果表明,温度对VSS的影响较大,植物在污泥形成过程中对污泥量没有明显影响,但可以改变污泥组成,湿地流态对污泥形成和组成均有影响,湿地中污泥的含量为0.4～0.6 g/L;种植有风车草的推流挡板湿地(池5)总体效果相对较好;各稳定表流湿地出水水质基本达到《城镇污水处理厂污染物排放标准》(GB18918-2002)二级标准,污泥形成后TN和NH3-N的去除率均有提高。

Influencing factors,including temperatures, plants and wetland flow states,of the formation and composition of sludge in the stable surface flow wetland were investigated. The decontamination effect during the formation of sludge was also discussed. The results showed that VSS was greatly influenced by temperature, plants had no significant effect on the formation of sludge but could change the composition of sludge, while the flow state had effects both on the formation and composition of sludge, the sludge contents of stable surface flow wetlands were 0.4 - 0.6 g/L. The overall effect of the pushing baffle wetland （pool 5） which was planted a windmill grass, was relatively better. The effluent quality of the stable surface flow wetlands satisfied secondary emission standard, the removal effect of total nitrogen and ammonia increased after the formation of sludge.