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引用本文:岑璐瑶,陈滢,张进,刘敏,吴庆明.种植不同植物的人工湿地深度处理城镇污水处理厂尾水的中试研究.湖泊科学,2019,31(2):365-374. DOI:10.18307/2019.0206
CEN Luyao,CHEN Ying,ZHANG Jin,LIU Min,WU Qingming.Pilot-scale study on advanced treatment of tail water of urban sewage treatment plant by constructed wetlands with different plants. J. Lake Sci.2019,31(2):365-374. DOI:10.18307/2019.0206
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种植不同植物的人工湿地深度处理城镇污水处理厂尾水的中试研究
岑璐瑶1, 陈滢1,2, 张进3, 刘敏1,2, 吴庆明1
1.四川大学建筑与环境学院, 成都 610065;2.中德水环境与健康研究中心, 成都 610065;3.四川省科学城天人环保有限公司, 成都 610225
摘要:
利用种植不同植物的人工湿地对污水厂尾水进行深度处理以达到更严格的排放标准.利用5块尺寸一致的中试规模人工湿地,以潮汐流作为运行方式,研究不同植物对尾水的处理效果.经过一年的实验,结果表明:5块人工湿地出水各指标均能达到提升标准的排放要求.在不同植物的去污效果对比实验中,种植芦苇(Phragmites communis)的人工湿地对化学需氧量(COD)、氨氮和总氮(TN)的平均去除率均为最高,分别为24.01%、68.15%和92.70%;种植风车草(Cyperus alternifolius)的人工湿地对TP的平均去除率最高,为71.68%.在不同季节的去污效果对比实验中,春季芦苇湿地对COD、氨氮和TN的去除效果最好,平均去除率分别为52.51%、76.06%和92.04%,美人蕉(Canna indica)湿地对TP去除效果最好,平均去除率为66.72%;夏季对COD、氨氮、TP和TN处理效果最好的分别是种植丝带草(Phalaris arundinacea)、菖蒲(Acorus calamus)、风车草和芦苇的人工湿地,平均去除率分别为15.83%、78.11%、67.30%和91.73%;秋季对COD、氨氮、TP、TN处理效果最好的分别是种植芦苇、丝带草、风车草、美人蕉的人工湿地,平均去除率分别为12.19%、58.82%、83.16%和94.01%;冬季对COD去除效果最好的是种植丝带草的人工湿地,平均去除率为33.39%,对氨氮、TP处理效果最好的是种植美人蕉的人工湿地,平均去除率分别为76.33%和79.43%,对TN处理效果最好的是种植芦苇的人工湿地,平均去除率为94.97%.在以后的实际工程中,可以考虑用种植不同季节、不同指标对应的最佳去污植物为主,并且搭配种植其他植物的人工湿地进行污水厂尾水的深度处理.
关键词:  人工湿地  水质标准  植物  污水处理厂尾水
DOI:10.18307/2019.0206
分类号:
基金项目:国家国际科技合作专项(2012DFG91520)资助.
Pilot-scale study on advanced treatment of tail water of urban sewage treatment plant by constructed wetlands with different plants
CEN Luyao1, CHEN Ying1,2, ZHANG Jin3, LIU Min1,2, WU Qingming1
1.School of Architecture and Environment, Sichuan University, Chengdu 610065, P. R. China;2.Sino-German Center for Water and Health Research, Chengdu 610065, P. R. China;3.Tianren Environmental of Protection Science City, Chengdu 610225, P. R. China
Abstract:
In order to meet stringent water quality standards, the tail water of the local wastewater treatment plant has been treated by constructed wetlands with different plants. Five pilot-scale constructed wetlands were investigated for the advanced treatment of the tail water of wastewater treatment plant, they had the same size, and were operated with a tidal flow, while they were planted with different plants to compare their treatment effects. After one year's experiment, the results showed that the all indexes of effluent from five constructed wetlands could meet the improved requirements. Among them, the constructed wetland planted with Phragmites communis had the highest average removal rates of chemical oxygen demand (COD), ammonia nitrogen, and total nitrogen (TN), which were 24.01%, 68.15%, and 92.70%, respectively. The constructed wetland planted with Cyperus alternifolius had the highest average removal rate of total phosphorus (TP), which was 71.68%. In the contrast experiment of the performance in different seasons, in the spring, the constructed wetland planted with Phragmites communis had the best removal effect on COD, ammonia nitrogen and TN, the average removal rates were 52.51%, 76.06% and 92.04%, respectively, and the constructed wetland planted with Canna indica had the best removal effect on TP, the average removal rate was 66.72%. In the summer, the constructed wetland respectively planted with Phalaris arundinacea, Acorus calamus, Cyperus alternifolius and Phragmites communis had the best removal effect on COD, ammonia nitrogen, TP and TN, the average removal rates were 15.83%, 78.11%, 67.30% and 91.73%, respectively. In the autumn, the constructed wetland respectively planted with Phragmites communis, Phalaris arundinacea, Cyperus alternifolius and Canna indica had the best removal effect on COD, ammonia nitrogen, TP and TN, respectively, the average removal rates were 12.19%, 58.82%, 83.16% and 94.01%, respectively. In the winter, the constructed wetland planted with Phalaris arundinacea had the best removal effect on COD, the average removal rate was 33.39%, the constructed wetland planted with Canna indica had the best removal effect on ammonia nitrogen and TP, the average removal rates were 76.33% and 79.43%, respectively, and the constructed wetland planted with Phragmites communis had the best removal effect on TN, the average removal rate was 94.97%. It will be of significance to the practical engineering in the future.
Key words:  Constructed wetland  water quality standard  plant  tail water of urban sewage
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