Restoration of hyper-eutrophic water with a modularized and air adjustable constructed submerged plant bed  

作　　者：Jinzhong LI Xueju LI Shujuan SUN Xuegong LIU Suiliang HUANG 

机构地区：[1]Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education,Numerical Simulation Group for Water Environment,Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China [2]Tianjin institution of water Sciences,Tianjin 300061,China [3]College of Resources and Environment,Shandong Agricultural University,Taian 271018,China

出　　处：《Frontiers of Environmental Science & Engineering》2011年第4期573-584,共12页环境科学与工程前沿（英文）

基　　金：This work was supported by NSF of Tianjin(Nos.043115111-3,09ZCGYSF00400,200801100);National Key-Projects of Water Pollution Control and Prevention(Nos.2009ZX07209-001 and 2008ZX07314-005-011);the National Natural Science Foundation of China(Grant No.5107906).

摘　　要：A modularized and air adjustable constructed submerged plant bed(CSPB)which can be used to restore the eutrophic water is introduced in this paper.This plant bed helps hydrophyte grow under poor conditions such as frequently changed water depth,impaired water transparency,algae bloom and substantial duckweed in summer,which are not naturally suitable for growing hydrophyte.This pilot study in Waihuan River of Tianjin,China,revealed that reduction of Chemical Oxygen Demand(COD),Total Nitrogen(TN)and Total Phosphorus(TP)by the use of CSPB could be reached 30%-35%,35%-40%,30%-40%respectively in the growing season(from March to October)and 5%-10%,5%-15%,7%-20%respectively in the winter(from November to February)when the detention time was 6 d.The relationships between the concentration of COD,TN,TP and the detention time fit the first-order kinetic equation well and the coefficients of determination(R^(2))were all above 0.9.The attenuation coefficients k of the kinetic equation were a function of the water temperature.When the water temperature was quite low or quite high,k was not significantly changed with increasing or decreasing water temperature.While when the temperature was in a moderate range,an increase or decrease of water temperature would lead to a rapid increase or decrease in k.

关 键 词：modularized and air adjustable constructed submerged plant bed water purification eco-restoration techniques aquatic plants EUTROPHIC 

分 类 号：TV1[水利工程]