应用QUAL2K模型模拟优选河道水体生态净化方案
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摘要
以南京市十字河为例,采用潜没式生态床、生态浮床、生物接触氧化床3种技术组合为6种生态净化方案,通过在不同的单元输入不同的降解参数,用QUAL2K模型对6种不同的水处理技术组合方案进行模拟,通过对模拟效果的综合评价选取最佳方案。结果表明:上、中、下游依次设计为生物接触氧化床、生态浮床、潜没式生态床的处理效果最佳,其BOD、NH3-N、TN和TP削减率分别为49.50%、32.81%、35.94%和45.27%。
Taking the Shizi River in Nanjing City as an example, six kinds of ecological purification scheme were combined by submerged ecological bed, ecological floating bed and biological contact oxidation technology. By inputting different degradation parameters to different units, the six kinds of water treatment technology combination scheme were simulated using the QUAL2 K model. The best scheme is selected through the comprehensive evaluation of the simulation effects. The results show that the optimal scenario is comprised of a bio-contact oxidation system in the upstream, followed by an ecological floating bed in the middle stream and a submerged ecological bed in the downstream. Under this scenario, the reduction rates for biochemical oxygen demand( BOD),ammonia nitrogen( NH3-N), total nitrogen( TN) and total phosphorus( TP) were 49. 50%, 32. 81%, 35. 94%and 45. 27%, respectively.
Taking the Shizi River in Nanjing City as an example, six kinds of ecological purification scheme were combined by submerged ecological bed, ecological floating bed and biological contact oxidation technology. By inputting different degradation parameters to different units, the six kinds of water treatment technology combination scheme were simulated using the QUAL2 K model. The best scheme is selected through the comprehensive evaluation of the simulation effects. The results show that the optimal scenario is comprised of a bio-contact oxidation system in the upstream, followed by an ecological floating bed in the middle stream and a submerged ecological bed in the downstream. Under this scenario, the reduction rates for biochemical oxygen demand( BOD),ammonia nitrogen( NH3-N), total nitrogen( TN) and total phosphorus( TP) were 49. 50%, 32. 81%, 35. 94%and 45. 27%, respectively.
引文
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[3]SIMEONOV V,STRATIS J A,SAMARA C.Assessment of surface water quality using multivariate statistieal techniques:a case study of Behrimaz Stream[J].Environmental Monitoring and Assessment,2009,159:543-553.
[4]ZHOU F,LIU Y,GUO H C.Application of multivariate statistical methods to water quality assessment of the water courses in Northwestern New Territories,Hong Kong[J].Environmental Monitoring and Assessment,2007,132:1-13.
[5]MORTBERG U M,BALFORS B,KNOL W C.Landscape ecological assessment:a tool for integrating biodiversity issues in strategic environmental assessment and planning[J].Journal of Environmental Management,2007,82:457-470.
[6]王佰伟,曹升乐.工业废水治理效果多目标评价方法研究[J].山东大学学报(工学版),2007,37(3):89-92.WANG B W,CAO S L.A multi-objective assessment method of the effects of industrial wastewater management[J].Journal of Shandong University(Engineering Science),2007,37(3):89-92.
[7]孟繁宇,樊庆锌,纪楠.城市污水处理厂综合评价指标体系构建与应用研究[J].环境与可持续发展,2012(2):85-91.
[8]刘扬,杨玉楠,王勇.层次分析法在我国小城镇分散型生活污水处理技术综合评价中的应用[J].水利学报,2008,39(9):1146-1150.LIU Y,YANG Y N,WANG Y.Application of analytic hierarchy process in comprehensive evaluation of decentralized domestic wastewater treatment in small town[J].Journal of Hydraulic Engineering,2008,39(9):1146-1150.
[9]郭春莉.城市污水处理工程综合效益评估的理论与模型研究[D].湘潭:湖南科技大学,2009.
[10]CHO J H,HA S R.Parameter optimization of the QUAL2K model for a multiple-reach river using an influence coefficient algorithm[J].Science of the Total Environment,2010,408:1985-1991.
[11]FAN C,KO C H,WANG W S.An innovative modeling approach using QUAL2K and HEC-RAS integration to assess the impact of tidal effect on river water quality simulation[J].Journal of Environmental Management,2009,90:1824-1832.
[12]PELLETIER G J,CHAPRA S C,TAO H.QUAL2Kw:a framework for modeling water quality in stream and rivers using a genetic algorithm for calibration[J].Environmental Modelling&Software,2006,21:419-425.
[13]FANG X,ZHANG J,CHEN Y,et al.QUAL2K model used in the water quality assessment of Qiantang River,China[J].Water Environment Research,2008,80:2125-2133.
[14]黄学平,万金保.QUAL2K模型及其在乐安河CODCr和NH3-N水环境容量的应用研究[J].中国农村水利水电,2013(1):19-22.
[15]刘超.仪征市水环境容量研究[D].扬州:扬州大学,2007.
[16]KANNEL P R,LEE S,LEE Y S,et al.Application of automated QUAL2Kw for water quality modeling and management in the Bagmati River,Nepal[J].Ecological Modelling,2007,202:503-517.
[17]CHAPRA S C,PELLETIER G J,TAO H.QUAL2K:a modeling framework for simulating river and stream water quality,version2.11:documentation and users manual[R].Medford:Civil and Environmental Engineering Department Tufts University,2008.
[18]US EPA.Screening procedure for toxic and conventional pollutants in surface and ground water,EPA/600/6-85/002a,1985a[R].Washington DC:US Environmental Protection Agency,1985.
[19]张瑞斌.不同水生植物对污水处理厂尾水的生态净化效果分析[J].环境工程技术学报,2015,5(6):504-508.ZHANG R B.Ecological purification efficiency of several aquatic plants on tail water of sewage treatment plant[J].Journal of Environmental Engineering Technology,2015,5(6):504-508.
[20]SAATY T L,VARGAS L G,WENDELL R E.Assessing attribute weights by ratio[J].Omega,1983,11(1):9-13.