摘要
采用凹凸棒复合滤料部分替代石英砂,利用凹凸棒复合滤料良好的吸附和生物挂膜性能对普通滤池进行生物强化。试验研究表明:降低滤速可以提高生物过滤对NH4+-N的去除率,最佳滤速为4 m/h。水温越高,NH4+-N的去除率越高,但在水温较低时生物过滤对NH4+-N仍能保持一定的去除率。原水中COD浓度越高,生物过滤对NH4+-N的去除率越低。凹凸棒复合滤料生物过滤对于突发性重金属污染亦有较好的缓冲能力。
We use attapulgite composite filter partially instead of quartz sand with its good absorption and biofilm performance to enhance normal filter.The experimental results show that reducing the filtration rate could increase the removal rate of biological filtration to NH＋4-N,and the best filtration velocity is 4 m/h.The higher the temperature is,the higher the removal rate is.But the low temperature could maintain the removal rate of biological filtration to NH＋4-N.The higher the COD concentration of raw water is,the lower the removal rate is.Also,attapulgite composite filter biological filtration has good buffering capacity for the sudden heavy metal pollution.
出处
《环保科技》
2010年第4期22-25,共4页
Environmental Protection and Technology
基金
2007年南京林业大学科技创新基金项目(编号:163050023)
南京林业大学2009年大学生科技创新项目(编号:200973)
