Controlling of crustacean zooplankton reproduction in biological activated carbon (BAC) filters by strengthen operation and management of conventional process
LIU Li-jun1,2, ZHANG Jin-song1,2, LI Xiao-wei3, HE Jun-guo1
1.School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China;2.Shenzhen Water Group,Shenzhen 518031,China;3.School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China
Abstract:
To counter the mass reproduction and penetration of crustacean zooplankton in Biological Activated Carbon(BAC)filters which may result in the presence of organisms in potable water and water pollution,this paper analyzed the factors affecting organisms’ reproduction in BAC filters.A comparative study was performed on the density and composition of crustacean zooplankton of the concerned water treatment units of two advanced water plants(Plant A and B)which with the same raw water and the same treatment technique in southern China.The results obtained show that the crustaceans’ density and composition was very different between the sand filtered water of Plant A and Plant B.which Harpacticoida bred sharply in the sediment tanks and penetrated sand filter into BAC filters was the primary reason of crustaceans reproduce in BAC filters of Plant A.For prevention of the organisms reproduction in BAC,some strengthen measures was taken including pre-chlorination,cleaning coagulation tanks and sediment tanks completely,increasing sludge disposal frequency to stop organisms enter BAC filters,and the finished water quality was improved and enhanced.
Key words: Crustacean zooplankton reproduction,BAC filter conventional treatment process strengthen operation and management tap water quality
DOI：10.11916/j.issn.1005-9113.2010.05.012
Clc Number:X703.1
Fund:
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