全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

生物强化生态床修复景观水过程中氮转化积累研究

Keywords: 优势菌群,生态床,景观水体,生物强化,氮转化

Full-Text   Cite this paper   Add to My Lib

Abstract:

以沸石和煤渣为主要基质构建复合生态床修复景观水体,从土著微生物中筛选驯化优势菌群对修复过程强化,考察生物强化过程对系统氮污染去除的强化及系统内氮的转化途径,并以天然土著微生物群强化和无生物强化为对比.结果表明,无生物强化的自然基质生态床可在短时间内通过离子交换吸附作用将ρ(NH_4~+-N)降低,系统内存在硝化作用,且NO_3~--N发生积累;而优势菌群强化系统对ρ(NH_4~+-N)的降低较快,且最后ρ<0.5mg/L,NO_3~--N积累量较小;优势菌群使系统很好完成对氮的循环去除.且优势菌群强化系统离子交换去除率及硝化去除率延程均显著提高,即从原污染水中驯化的氮转化功能菌群能强化系统的氮转化,菌群功能与活性在延程中受到影响较小.

References

[1]  GILLIAM J W.Riparian wetlands and water quality[J].Journal of Environmental Quality,1994,23:896-900.
[2]  ORILAHAV E A,SHELDON T.Ammonium removal using a novd unsaturated flow biological filter with passive aeration [J].Water Research,2001,35(2):397-404.
[3]  张荣社,李广贺,周琪,等.潜流湿地中植物对脱氮除磷效果的影响中试研究[J].环境科学,2005,26(4):83-86.ZHANG Rong-she,LI Guang-he,ZHOU Qi,et al.Effects of plants on nitrogen/phosphorus removal in subsurface constructed wetlands[J].Environmental Science,2005,26(4):83-86.(in Chinese)
[4]  BRIX H.Function of macrophytes in constructed wetlands[J].War Sci Tech,1994,29:71-78.
[5]  REDDY K R,PATRICK W H,LINDAU C W.Nitrification and denitrification at the plant root and sediment interfaces in wetlands[J].Limnology and Oceanography,1989,34:1004-1013.
[6]  INGERSOLL T L,BAKER L A.Nitrate removal in wetland microcosms[J].Water Research,1998,32(3):677-684.
[7]  XUE Y,KOVACIC D A,DAVID M B.In situ measurements of denitrification in constructed wetlands[J].J Environ Qual, 1999,28(1):263-269.
[8]  周巧红,吴振斌,付贵萍,等.人工湿地基质中酶活性和细菌生理群的时空动态特征[J].环境科学,2005,26(2):108-112.ZHOU Qiao-hong,WU Zhen-bin,FU Gui-ping,et al.Temporal and spatial characteristics of substrate enzyme activities and bacteria physiological groups in constructed wetland[J].Environmental Science,2005,26(2):108-112.(in Chinese)
[9]  DONALD W K,CHARLES Q J,YAN J Y.Waste water remediation using coal ash[J].Mater Cycles Waste Manage, 2003,5:5-8.
[10]  张锡辉.水环境修复工程学原理与应用[M].北京:化学工业出版社,2002.
[11]  JENSEN K,REVSBECH N P,NIELSEN L P.Microscale distribution of nitrification activity in sediment determined with a sheilded micro sensor for nitrate[J].Applied Environment Microbiology,1993,59:3287-3296.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133