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引用本文:梁康,常军军,王飞华,刘双元,梁威.垂直流人工湿地对尾水的净化效果及最佳水力负荷.湖泊科学,2016,28(1):114-123. DOI:10.18307/2016.0113
LIANG Kang,CHANG Junjun,WANG Feihua,LIU Shuangyuan,LIANG Wei.Purification ability of tail water and optimal hydraulic loading rates in vertical flow constructed wetland. J. Lake Sci.2016,28(1):114-123. DOI:10.18307/2016.0113
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垂直流人工湿地对尾水的净化效果及最佳水力负荷
梁康1,2, 常军军3, 王飞华1, 刘双元1,2, 梁威1
1.中国科学院水生生物研究所淡水生态与生物技术国家重点实验室, 武汉 430072;2.中国科学院大学, 北京 100049;3.云南大学工程技术研究院, 昆明 650091
摘要:
以污水厂尾水为处理对象,研究垂直流人工湿地在4种水力负荷(125、250、375和500mm/d)条件下的周年净化效果,结果表明:秋季时系统的总氮去除率最高,冬季则显著降低;温度为10℃、溶解氧浓度为1.1mg/L是反硝化强度显著降低的关键拐点;总磷在冬季较其他季节净化效果高;125 mm/d水力负荷下CODCr去除率显著高于其他水力负荷,冬季CODCr去除率显著降低,而其他水力负荷及季节下的去除效果没有显著差异;当湿地以高去除率为目标时,最佳水力负荷为125mm/d;当湿地以地表水水环境质量Ⅴ类标准为目标时,最佳水力负荷为375mm/d;当湿地以污染物去除量为目标时,最佳水力负荷为500mm/d.综合推荐375mm/d为最佳水力负荷.
关键词:  垂直流人工湿地  尾水  水力负荷  季节变化  净化效果
DOI:10.18307/2016.0113
分类号:
基金项目:国家水体污染控制与治理科技重大专项(2011ZX07303-001)、水利部科技推广项目(TG1520)和江苏省科技厅项目(BK20130430)联合资助.
Purification ability of tail water and optimal hydraulic loading rates in vertical flow constructed wetland
LIANG Kang1,2, CHANG Junjun3, WANG Feihua1, LIU Shuangyuan1,2, LIANG Wei1
1.State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China;2.University of Chinese Academy of Sciences, Beijing 100049, P. R. China;3.Research Institute of Engineering and Technology, Yunnan University, Kunming 650091, P. R. China
Abstract:
Four vertical flow constructed wetlands were employed to evaluate the purification effects within tail water in different seasons under four hydraulic loading rates (125, 250, 375 and 500 mm/d). The results showed that the highest removal efficiency of total nitrogen was achieved in autumn while decreased significantly in winter. The key points of temperature and dissolved oxygen for denitrification were 10℃ and 1.1 mg/L, respectively. The wetland system was more effective for phosphorus removal in winter than in other seasons. Removal efficiency of CODCr under 125 mm/d was significantly higher than that of other hydraulic loading rates, the lowest treatment performance of CODCr was achieved in winter,and with no significant variation in other hydraulic loading rates and other seasons. To obtain a full pollutant-removal efficiency of the wetland system, the optimal hydraulic loading rate is at 125 mm/d. To reach the V class of surface water environment quality standard, the optimal hydraulic loading rate is at 375 mm/d. To receive the amount of pollutant removal, the optimal hydraulic loading rate is 500 mm/d. Based on full consideration, the optimal hydraulic loading rate should be at 375 mm/d.
Key words:  Vertical flow constructed wetland  tail water  hydraulic loading rates  seasonal variation  treatment performance
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