垂直流湿地对生活污水中磷的去除效果研究  

Removal Efficiency of Phosphorus in Sewage by Vertical Flow Constructed Wetlands

作　　者：龚琴红[1] 田光明[1] 丁晔[1] 吴坚阳[1] 

机构地区：[1]浙江大学环境与资源学院环境工程系,浙江杭州310029

出　　处：《农业环境科学学报》2004年第6期1046-1049,共4页Journal of Agro-Environment Science

基　　金：浙江省重大项目(021103723);国家高科技项目太湖863专项(2002AA601012-01)

摘　　要：在5个不同的水力负荷条件下,研究了2种填料结构的垂直流湿地对低浓度生活污水中磷的去除效果。结果表明,运行初期人工湿地填料的结构和水力负荷对污水中磷的去除有一定的影响。水力负荷为8.5、10.6、14.1和21.2cm·d-1时,双层填料湿地(1号湿地)对磷的去除效率均可高达97.5%。多层填料湿地(2号湿地)的水力负荷为8.5和10.6cm·d-1时,对磷的去除率可达96.3%;当水力负荷为14.1、21.2和42.4cm·d-1时,人工湿地对TP的去除效率随水力负荷的增大而逐渐降低,分别为92.7%、81.2%和34.5%。磷的静态吸附实验表明,填料对磷的吸附是非常有限的。填料对磷吸附饱和前,垂直流湿地对生活污水中的磷具有良好的去除效果;填料磷吸附饱和后,去除效果较差。Under conditions of 5 hydraulic loading rates, the effects of TP removal from a low concentration level of sewage by two vertical flow constructed wetlands, which had different media structure, were evaluated. The wastewater was fed continuously with hydraulic loading rates of 8.5,10.6,14.1,21.2 and 42.4 cm· d- 1 and drained intermittently at intervals of 2.5, 2, 1.5, 1, and 0.5 d, respectively. The media of the two wetlands systems were sand and gravel. The influent TP concentration was in a rage of 1.3～ 3.3 mg· L- 1.The experimental data indicated that media structure and hydraulic loading rate affected TP removal at the early stage of experiment. Changes of TP concentration along the path were obvious different between the dual- media wetland (No1 wetland) and the multilayer media wetland (No2 wetland). TP concentration for No1 wetland reduced gradually along the path, No2 wetland changed wavily along the path. TP removal efficiency of the No1wetland got up to 97.5% with the hydraulic loading rates of 8.5～ 21.2 cm· d- 1, No2 wetland 96.3% with the hydraulic rates of 8.5 and 10.6 cm· d- 1. However, TP removal rates of No2 wetland were 92.7% , 81.2% and 34.5% , respectively, with the hydraulic rates of 14.1, 21.2 and 42.4 cm· d- 1, which declined following hydraulic rates rising. P- adsorption experiment results showed that P- adsorption quantity of media were very limited. P removal efficiency was satisfactory before media P- adsorption saturation, while got worse after its saturation of the two vertical flow constructed wetlands.

关 键 词：垂直流湿地 生活污水 磷 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]