环境工程学报2011，Vol.5Issue(4)：777-782,6.
改性硅藻土用于巢湖水脱磷研究
Research on phosphorus removal from Chao Lake water with modified diatomite
摘要
Abstract
Treatment of Chao Lake water using modified diatomite by enhanced coagulation was studied for phosphorus removal. Optimal operation conditions to remove phosphorus with modified diatomite were determined by experiments, furthermore, the removal and economic efficiency of modified diatomite were compared to those of regular coagulants. The results show that, the treatment effects are optimal when the velocity gradient for mixing the modified diatomite and the water is about 260 s- 1, the velocity gradient for flocculation reaction is about 20 s-1, the flocculation reaction time is 15 min, the sedimentation time is 1 h, and the dosage of modified diatomite is 50 ～ 100 mg/L. The removal rates of TP are almost above 85％ which can be even up to 99％. TP concentrations of the effluents can reach to the forth standard of environmental quality standards for surface water (GB3838-2002) ( lake and reservoir) , while some can be up to the second even the primary standard. Compared with the regular coagulants, the effluents treated by modified diatomite show clearer apparent, better sludge settling property and less amount of sludge, therefore, the construction and operation costs could be lower.关键词
改性硅藻土/巢湖/除磷/污泥Key words
modified diatomite/ Chao Lake/ phosphorus removal/ sludge分类
资源环境引用本文复制引用
吴蕾,陈云峰..改性硅藻土用于巢湖水脱磷研究[J].环境工程学报,2011,5(4):777-782,6.基金项目
国家巢湖水专项流域面源水污染控制与生态环境管理技术方案(2008ZX07103-007) （2008ZX07103-007）
国家巢湖水专项湖泊直立堤岸基底改善与湖滨带生态修复技术及工程示范课题(2008ZX07103-004) （2008ZX07103-004）
