富营养化水体清淤后的微生物脱氮技术应用  

Application of microbial removal of nitrogen in dredged eutrophic water

作　　者：雷静[1] 年夫喜[1,2] 冯国栋[1] 梁运祥[1] 陈正军[1] 葛向阳[1] 

机构地区：[1]华中农业大学农业微生物学国家重点实验室,武汉430070 [2]湖北省水利水电规划勘测设计院,武汉430070

出　　处：《环境工程学报》2016年第7期3949-3955,共7页Chinese Journal of Environmental Engineering

基　　金：湖北省水利重点科研课题(HBSLKJ201302)

摘　　要：景观水体清淤带来的主要负面影响是水体富营养化。为了探索清淤及微生物修复的组合应用,通过在实验室建立模型,分别研究了清淤、微生物修复及二者结合处理对富营养化水体水质的影响。结果表明,清淤能降低氨氮的释放。底泥微生物的活动会促进氨氮的释放,增加水体的富营养化风险。单纯清淤会使底泥的硝化作用增强,但同时使反硝化作用减弱,降低水体总氮的去除能力。因此,通过投加氮循环微生物可促进清淤后的反硝化作用,消减湖泊底泥及上覆水中的氮素含量,达到修复富营养化湖泊的目的。研究结果表明,清淤和微生物修复技术结合使用,可减少水体氮素积累,避免蓝藻爆发,是富营养化水体清淤防控的一种有效措施。Eutrophication is the major main negative consequence of dredging in landscape water. To study the combined effects coation of dredging and microbial remediation,three different groupstreatments,which were classified as dredging,microbial remediation,and remediation after dredging,were studied based using on a simulated laboratory model. The results showed that the release of ammonia was reduced in dredged water and that microbial activities stimulated the releasing of ammonia,which increased the risk for eutrophication. However,n Nitrification was increased while and denitrification was weakened after dredging,thus retarding total nitrogen removal. Therefore,supplementationed with nitrogen cycle relatedbeneficial microorganisms could stimulate denitrification,to remove dissolved nitrogen,and mediate the precipitation and deposition of nitrogen in to the sediments,which as has been observed provided for during the bioremediation of eutrophic lakes. This study confirmed that combining dredging with microbial remediation reduces the accumulation of nitrogen and eliminates the risk of blue algae blooms. Thus,the combined technique is dredging was an effective way strategy to for stabilizinge water quality by reaccumulation nitrogen and of blue algae bloom.

关 键 词：底泥清淤 微生物修复 富营养化湖泊 氨氮 硝化 反硝化 

分 类 号：X703[环境科学与工程—环境工程]