城市污水人工土快滤床与水生植物复合处理系统

用种植水生植物的人工土快滤床处理城市污水,在成都市南郊污水泵站进行了为期一年的中试试验.结果表明,种植水生植物的人工土快滤床处理系统对城市污水中COD、BOD₅、SS、TN、TP等的去除率分别为78.2%,87.0%,85.9%,40.1%和56.0%;处理出水中COD、BOD₅和SS的平均浓度分别为54.6、16.9、15.7mg/L;种植水生植物的人工土快滤床的水力负荷率和有机污染负荷分别为288m/a和26.6kgBOD5/(m2(a);研究还发现种植水花生可以把人工土快滤床对TN和TP的去除率分别提高22.5%和27.6%,而且能减少人工土快滤床表面的刮膜次数,同时还能增加处理出水中溶解氧的含量.

Combining artificial soil filter and aquatic plant for treating municipal sewage

The treatment of municipal sewage with artificial soil rapid infiltration for planting of aquatic plant was studied for one year at the sewage pump station in the south suburb of Chengdu city. The results show that the removal rates of COD, BOD5, SS, TN and TP are 78.2%, 87.0%, 85.9%, 40.1% and 56.0%, respectively; The average concentrations of COD, BOD5, and SS in the treated effluent are 54.6mg/L, 16.9mg/L and 15.7mg/L, respectively; The hydraulic and organic pollution loading rates of the artificial soil filter are 288m/a and 26.6kgBOD5/(m2(a); Planting of aquatic peanut not only raises the removal rates of TN and TP in the artificial soil filter by 22.5% and 27.6% respectively, but also decreases the scraping times of biological films in the bed surface, and increases dissolved oxygen in the treated effluent.