水力空化辅助臭氧氧化去除水产养殖水体中叶绿素a
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2020-03-04 09:33:52
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生态与农村环境学报2014,30(4):505-508JournalofEcologyandRuralEnvironment水力空化辅助臭氧氧化去除水产养殖水体中叶绿素a汤传栋1,2,张宇峰1①,王伟民2,李维新2,武志林2,赵诣2(1.南京工业大学环境学院,江苏南京211816;2.环境保护部南京环境科学研究所,江苏南京210042)摘要:通过中试试验研究了单独臭氧、负压空化辅助臭氧和正压空化辅助臭氧3种处理方式对水产养殖水体中叶绿素a的去除效果。结果表明,在臭氧流量为3L·min-1、臭氧质量浓度为110mg·L-1和进水流量为12.5L·min-1条件下运行140min后,单独臭氧曝气对叶绿素a的去除率稳定在62.3%左右,负压空化辅助臭氧处理去除率最高可稳定在78.8%,正压空化辅助臭氧处理去除率最高可稳定在82.2%。水力空化(正压)辅助臭氧处理臭氧利用率可达94.8%,比单独臭氧曝气处理提高47.0%;1kWh耗电量条件下,正压空化和负压空化辅助臭氧处理叶绿素a去除率比单独臭氧处理分别提高17.9%和34.1%。关键词:水力空化;臭氧;富营养化;叶绿素a中图分类号:X52文献标志码:A文章编号:1673-4831(2014)04-0505-04RemovalofChlorophyll-aFromAquacultureWaterWithHydrodynamicCavitation-AssistedOzonationMethod.TANGChuan-dong1,2,ZHANGYu-feng1,WANGWei-min2,LIWei-xin2,WUZhi-lin2,ZHAOYi2(1.CollegeofEnviron-ment,NanjingTechUniversity,Nanjing211816,China;2.NanjingInstituteofEnvironmentalSciences,MinistryofEn-vironmentalProtection,Nanjing210042,China)Abstract:Apilottestwasconductedtoexploreefficienciesofthreechlorophyll-aremovingmethodstotreataquaculturewater,i.e.ozonationalone,suctioncavitation-assistedozonationandextrusioncavitation-assistedozonation.Resultsshowthatafter140minofexposuretoozone,3L·min-1inozoneflowrate,110mg·L-1inozoneconcentrationand12.5L·min-1ininflowrate,chlorophyll-aremovalrateinaquaculturewaterlingeredaround62.3%withozonationalone,78.8%withsuctioncavitation-assistedozonation,and82.2%withextrusioncavitation-assistedozonation.Moreover,comparisonwasalsomadebetweenthethreemethodsinozoneutilizationrateandenergyconsumptionrate.Hydrodynamic(extrusion)cavitation-assistedozonationreached94.8%inozoneutilizationrate,47.0%higherthanozonationalone.Bycomparingchlorophyll-aremovalrateperunitenergyconsumption,itwasfoundthatextrusioncavitation-assistedozonationandsuctioncavitation-assistedozonationwas17.9%and34.1%higherthanozonationalone.Keywords:hydrodynamiccavitation;ozone;eutrophication;chlorophyll-a收稿日期:2014-02-10基金项目:国际科技合作项目(2010DFB93700)①通信作者E-mail:zhangyuf99@126.com水产养殖过程中过量投放饲料、水产品排泄物及底泥氮磷释放等易引起水体中氮磷浓度超标,加速藻类和一些浮游生物的繁殖,形成水华或赤潮[1]。养殖池塘水体中微囊藻等具有假空泡的蓝
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