摘要
在东莞市石碣镇万丰菜场构建3种人工湿地,研究水力负荷对菜地废水的净化效果及最优水力负荷下冬夏两季的处理效果差异。结果表明,随着水力负荷的减小,人工湿地的COD、NH4+-N、TP出水浓度逐渐降低,去除率逐渐提高,3种人工湿地最优水力负荷为0.1 m/d。最优水力负荷下,3种人工湿地对废水的净化效果夏季优于冬季;同一季节,垂直流-水平潜流一体化湿地对菜地废水的净化效果较佳:对COD、TP、TN、NH4+-N的去除率分别达57.14%、84.78%、71.90%、37.78%以上,且出水浓度均达到《地表水环境质量标准》(GB3838-2002)Ⅳ类水质标准。
In this study, three kinds of constructed wetland were developed to treat the wastewater in Wanfeng farm, Shijie town, Dongguan city. Effects of hydraulic loading rate of constructed wetlands on purification of wastewater and treatment efficiency differences in the winter and summer under optimal hydraulic load were discussed. The results indicated that the effluent concentrations of COD, NH4＋-N, TP decreased and the removal rates of COD, NH4＋-N, TP increased along with the decrease of hydraulic loading. The optimal hydraulic loading rate was 0.1 m/d. Under the optimal hydraulic, the purification efficiency of summer was better than winter for three kinds of constructed wetland. And the treatment efficiency of the integrated vertical-flow and horizontal-flow constructed wetland was better in the same season, the average removal rates of COD, TP, TN, NH4＋-N of were 57.14%, 84.78%, 71.90%, 37.78%, respectively, and the average concentrations all reached the level-IV of ＂Environmental Quality Standards for Surface Water＂ （GB 3838-2002）.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第19期178-182,共5页
Guangdong Agricultural Sciences
基金
广东省海洋渔业局项目(B201001C03)
国家自然科学基金(41071214
41271245)
广东省科技计划项目(2012A020100003)
广东省教育厅项目(2012gczxA1004)
关键词
菜地废水
人工湿地
净化效果
水力负荷
季节
wastewater of vegetable land
constructed wetland
removal efficiency
hydraulic loading
season
