NDLI: Distribution and Survival of Six Kinds of Indicator and Pathogenic Microorganisms in a Full-Scale Constructed Wetlands in China

Content Provider	IEEE Xplore Digital Library
Author	Zhiwen Song Lei Wu Min Xu Shaopeng Wen Yang Zhou Miao Yu
Copyright Year	2008
Description	Author affiliation: Inst. of Environ. & Municipal Eng., Qingdao Technol. Univ., Qingdao (Zhiwen Song; Lei Wu; Min Xu; Shaopeng Wen; Yang Zhou; Miao Yu)
Abstract	Removal efficiency and distribution of six kinds of indicator and pathogenic microorganisms in a full scale constructed wetlands in China were analyzed, and die-off rates of the indicator and pathogenic microorganisms in the water and the sediment of the constructed wetlands were determined. The results showed that the constructed wetlands could effectively reduce Escherichia coli by 99.9%, fecal streptococci by 99.8%, total coliforms by 99.8% and fecal coliforms by 99.8%, the Salmonella spp. removal efficiency was relatively low by 97.5% and the C. perfringens removal was the least by 77.2%. On a volume/dry weight basis the number of indicator and pathogenic organisms were two to three orders of magnitude higher in the sediment compared to the water column, which indicated the indicator and pathogenic organisms tend to concentrate in sediments of constructed wetland. The quantity of Salmonella spp. in effluent and sediment and the C. perfringens in sediment were magnitude greater than that of total coliforms, fecal coliforms, fecal streptococci and Escherichia coli. The die-off rates of the indicator and pathogenic microorganisms were quite different and were greater in the water than in the sediment. The die-off rates of fecal streptococci in water column and Salmonella spp in the sediment were highest among the six kinds of indicator and pathogenic microorganisms by $2.2041og_{10}$ $day^{-1}$ and $0.4141og_{10}$ $day^{-1}$ respectively, while the die-off rates of C. perfringens in water column and sediment were lowest by $0.4541og_{10}$ $day^{-1}$ and $0.0151og_{10}$ $day^{-1},$ respectively.
Starting Page	3394
Ending Page	3397
File Size	186659
Page Count	4
File Format	PDF
ISBN	9781424417476
DOI	10.1109/ICBBE.2008.352
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pathogens Microorganisms Costs Investments Effluents Solids Organisms Sediments Wastewater treatment Chemicals
Content Type	Text
Resource Type	Article

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