复合生态浮岛处理微污染河水
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摘要
构建融合具有缓释碳源特性的生态基质的复合生态浮岛(CFI),研究了DO对CFI净化效果的影响,探究了CFI的微生物群落结构及其多样性。结果发现:不同DO条件下CFI的TN去除效果均明显高于普通生态浮岛(FI),表明其具有强化脱氮作用。ρ(DO)为3~5 mg/L时CFI的NH_4~+-N和TN的平均去除率比ρ(DO)为1~3 mg/L时分别提高了28.15%和降低了19.98%,说明提高DO有利于NH_4~+-N的去除,但不利于TN的去除。CFI中的优势菌种较为集中,主要为假单胞菌属、紫色杆菌属和狭义梭菌属。CFI中的物种丰度高于FI,FI中的微生物群落多样性高于CFI。
Compound ecological floating island(CFI) comprising ecological substrate which had the characteristic of slowreleasing carbon was constructed,and the effects of DO on the purification effect of CFI were studied,and the microbial community structure and diversity of CFI were investigated.The rusults showed that under different dissolved oxygen,the removal efficiencies of TN in CFI were better than ordinary ecological floating island(FI).When ρ(DO) was 3 ~ 5 mg/L,the average removal efficiencies of NH_4~+-N and TN by CFI were 28.15% higher and 19.98% lower than ρ(DO) was at 1 ~3 mg/L respectively.Improving dissolved oxygen was beneficial to remove NH_4~+-N and harmful to remove TN.The predominant bacteria in CFI was concentrated,including Pseudomonas,Janthinobacterium and Clostridium sensu stricto.The species richness of samples in CFI was higher than FI and the diversity of microbial communities in FI was higher than CFI.
Compound ecological floating island(CFI) comprising ecological substrate which had the characteristic of slowreleasing carbon was constructed,and the effects of DO on the purification effect of CFI were studied,and the microbial community structure and diversity of CFI were investigated.The rusults showed that under different dissolved oxygen,the removal efficiencies of TN in CFI were better than ordinary ecological floating island(FI).When ρ(DO) was 3 ~ 5 mg/L,the average removal efficiencies of NH_4~+-N and TN by CFI were 28.15% higher and 19.98% lower than ρ(DO) was at 1 ~3 mg/L respectively.Improving dissolved oxygen was beneficial to remove NH_4~+-N and harmful to remove TN.The predominant bacteria in CFI was concentrated,including Pseudomonas,Janthinobacterium and Clostridium sensu stricto.The species richness of samples in CFI was higher than FI and the diversity of microbial communities in FI was higher than CFI.
引文
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[2]Li X N,Song H L,Li W,et al.An integrated ecological floatingbed employing plant,freshwater clam and biofilm carrier for purification of eutrophic water[J].Ecological Engineering,2010,36(4):382-390.
[3]Lu H L,Chenruei K,Chang Y H.Water quality improvement with artificial floating islands[J].Ecological Engineering,2015,74:371-375.
[4]于鲁冀,陈涛,柏义生,等.微污染水体水平潜流湿地强化脱氮研究[J].环境工程,2016,34(3):18-21.
[5]袁腾.微污染河水的旁路生态净化实验研究及老运粮河河水净化中试试验[D].西安:西安建筑科技大学,2015.
[6]卜发平,罗固源,许晓毅,等.美人蕉和菖蒲生态浮床净化微污染源水的比较[J].中国给水排水,2010,26(3):14-17.
[7]邓志强.人工浮床净化污染水体中氮磷的研究[D].北京:中国科学院大学,2013.
[8]李文芬,刘沛芬,颜亨梅,等.5种浮床植物在水环境恢复治理中的净化差异[J].北京师范大学学报(自然科学版),2012,48(2):173-176.
[9]吴诗杰,陈慧娟,许小桃,等.美人蕉、鸢尾、黄菖蒲和千屈菜对富营养化水体净化效果研究[J].安徽大学学报(自然科学版),2016,40(1):98-108.
[10]国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[11]晋凯迪,于鲁冀,陈涛,等.植物碳源调控对人工湿地脱氮效果的影响[J].环境工程学报,2016,10(10):5611-5616.
[12]晋凯迪.植物碳源调控下水平潜流湿地强化脱氮试验研究[D].郑州:郑州大学,2016.
[13]齐钰鹏.微纳米曝气强化碳纤维浮床对城市河道水体处理效果[D].北京:北京化工大学,2016.
[14]Hang Q,Wang H,Chu Z,et al.Application of plant carbon source for denitrification by constructed wetland and bioreactor:Review of recent development[J].Environmental Science and Pollution Research,2016,23(9):8260.
[15]Ding Y,Song X,Wang Y,et al.Effects of dissolved oxygen and influent COD/N ratios on nitrogen removal in horizontal subsurface flow constructed wetland[J].Ecological Engineering,2012,46(9):107-111.
[16]Li F,Lu L,Zheng X,et al.Enhanced nitrogen removal in constructed wetlands:Effects of dissolved oxygen and step-feeding[J].Bioresource Technology,2014,169(5):395.
[17]肖蕾,贺锋,梁雪,等.不同碳源添加量对垂直流人工湿地污水处理效果的影响[J].环境工程学报,2013,7(6):2074-2080.
[18]Gao Y,Sun C.Purification of stream flowing into dian lake by ecological floating-bed system[C]//Bioinformatics and Biomedical Engineering.The 2nd International Conference on IEEE,2008:2932-2935.
[19]冯丽娟.平原河网受污染原水生物膜预处理工艺技术研究[D].杭州:浙江大学,2013.
[20]Freese H M,Eggert A,Garland J L,et al.Substrate utilization profiles of bacterial strains in plankton from the River Warnow,a humic and eutrophic river in north Germany[J].Microbial Ecology,2010,59(1):59-75.
[21]布坎南.伯杰细菌鉴定手册[M].北京:科学出版社,1984.
[22]刘晖,孙彦富,周康群,等.PCR-DGGE法研究Sludge biomembrane(SB)系统中反硝化聚磷菌的变化[J].中南大学学报(自然科学版),2011,42(4):1167-1174.
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