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    Migration and Control of Invertebrates in Waterworks with Advanced Treatment

    Source: Journal of Environmental Engineering:;2018:;Volume ( 144 ):;issue: 007
    Author:
    Zhu Jie;Tang Xianchun;Wu Zhiling;Chen Hongbin
    DOI: 10.1061/(ASCE)EE.1943-7870.0001366
    Publisher: American Society of Civil Engineers
    Abstract: The migration of invertebrates at each step of the treatment process in four waterworks with advanced treatment in eastern China was investigated for the first time. Raw water quality and water temperature had a strong effect on invertebrate abundance and species. A combination of sedimentation with pretreatment, ozonation, and disinfection was able to remove or inactivate the invertebrates. Enhanced sand filtration combined with chlorine or micro-coagulation effectively promoted the removal of invertebrates by filtration. Invertebrates colonized both down-flow and up-flow biological activated carbon (BAC) filters; thus, fixation of a BAC filter as the penultimate process before disinfection was inadequate. The addition of a persistent disinfectant before the clear water tank and regular flushing and washing of the clear water tank were essential. The total abundance of invertebrates in the clear water tank could be as high as 13–14  ind./m3; rotifers and nematodes were the dominant species and accounted for 85.9–1% of total invertebrates. As a result, future studies should focus on the removal and control of rotifers and nematodes in waterworks.
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      Migration and Control of Invertebrates in Waterworks with Advanced Treatment

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4250451
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    contributor authorZhu Jie;Tang Xianchun;Wu Zhiling;Chen Hongbin
    date accessioned2019-02-26T07:56:48Z
    date available2019-02-26T07:56:48Z
    date issued2018
    identifier other%28ASCE%29EE.1943-7870.0001366.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4250451
    description abstractThe migration of invertebrates at each step of the treatment process in four waterworks with advanced treatment in eastern China was investigated for the first time. Raw water quality and water temperature had a strong effect on invertebrate abundance and species. A combination of sedimentation with pretreatment, ozonation, and disinfection was able to remove or inactivate the invertebrates. Enhanced sand filtration combined with chlorine or micro-coagulation effectively promoted the removal of invertebrates by filtration. Invertebrates colonized both down-flow and up-flow biological activated carbon (BAC) filters; thus, fixation of a BAC filter as the penultimate process before disinfection was inadequate. The addition of a persistent disinfectant before the clear water tank and regular flushing and washing of the clear water tank were essential. The total abundance of invertebrates in the clear water tank could be as high as 13–14  ind./m3; rotifers and nematodes were the dominant species and accounted for 85.9–1% of total invertebrates. As a result, future studies should focus on the removal and control of rotifers and nematodes in waterworks.
    publisherAmerican Society of Civil Engineers
    titleMigration and Control of Invertebrates in Waterworks with Advanced Treatment
    typeJournal Paper
    journal volume144
    journal issue7
    journal titleJournal of Environmental Engineering
    identifier doi10.1061/(ASCE)EE.1943-7870.0001366
    page4018043
    treeJournal of Environmental Engineering:;2018:;Volume ( 144 ):;issue: 007
    contenttypeFulltext
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