Tran Thi Hien Hoa

Asian Institute of Technology, Krung Thep, Bangkok, Thailand

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Publications (1)4.49 Total impact

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    Tran Thi Hien Hoa · Warounsak Liamleam · Ajit P Annachhatre
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    ABSTRACT: The feasibility of lead removal through biological sulfate reduction process with ethanol as electron donor was investigated. Sulfide-rich effluent from biological process was used to remove lead as lead sulfide precipitate. The experiments were divided into two stages; Stage I startup and operation of sulfidogenic process in a UASB reactor and Stage II lead sulfide precipitation. In Stage I, the COD:S ratio was gradually reduced from 15:1 to 2:1. At the COD:S ratio of 2:1, sulfidogenic condition was achieved as identified by 80-85% of electron flow by sulfate reducing bacteria (SRB). COD and sulfate removal efficiency were approximately 78% and 50%, respectively. In Stage II, the effluent from UASB reactor containing sulfide in the range of 30-50 mg/L and lead-containing solution of 45-50 mg/L were fed continuously into the precipitation chamber in which the optimum pH for lead sulfide precipitation of 7.5-8.5 was maintained. It was found that lead removal of 85-95% was attained.
    Full-text · Article · Oct 2007 · Bioresource Technology

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25 Citations
4.49 Total Impact Points

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  • 2007
    • Asian Institute of Technology
      • Department of Environmental Engineering and Management (EEM)
      Krung Thep, Bangkok, Thailand