摘要
采用三种人工浮床池研究净化西太湖地区富营养化河水,结果表明：三种浮床池对河水均具有良好的净化效果,其中设置填料的二种浮床池对河水中SS、NH_4-N、TP的平均净化率分别达到64．1％～65．6％、62．2％～69．8％、50．4％～60．1％,填料的设置对河水净化起到了一定的促进作用。与球形填料相比,组合填料的表面积更大,能够固定更多的微生物,因此对应的浮床池净化效果更好。浮床植物光合作用使得池水中溶解氧含量呈现昼夜交替变化,为脱氮提供了良好的环境条件。
Experimental equipments consisting of 3 man-made floating islands in parallel connected with a sedimentation tank were used to purify eutrophicated river water near west Taihu lake. Amount of water treated by each island was 10m^3/d, and HRT was 2 d, and surface hydraulic load was 0.42 m^3/m^2·d. The test results indicated that floating island fixed with spherical suspending and fiber-like carriers had the highest purification efficiencies to removing SS, NH4-N, CODCr NO2-N, NO3-N and TP. The average purification rates of them were 64.1%～65.6%,62.2%～69.8%,74.5%, 68.48%,72.32%,and50.4%～60.1%, respectively. Carriers grown with microbial film could effectively enhance pollutant removal. Diurnal dissolved oxygen concentration changed due to photosynthesis of plants fixed in floating islands to improve denitration from river water.
出处
《净水技术》
CAS
2006年第5期1-3,共3页
Water Purification Technology
基金
国家863重大专项(2002AA601013
2002AA601012
2003AA601020)资助课题
关键词
富营养化
人工浮床
净化
填料
eutrophication
man-made floating island
purification media
