A new multiple-stage electrocoagulation process on anaerobic digestion effluent to simultaneously reclaim water and clean up biogas

Zhiguo Liu, David Stromberg, Xuming Liu, Wei Liao, Yan Liu

    Research output: Research - peer-reviewArticle

    • 10 Citations

    Abstract

    A new multiple-stage treatment process was developed via integrating electrocoagulation with biogas pumping to simultaneously reclaim anaerobic digestion effluent and clean up biogas. The 1st stage of electrocoagulation treatment under the preferred reaction condition led to removal efficiencies of 30%, 81%, 37% and >99.9% for total solids, chemical oxygen demand, total nitrogen and total phosphorus, respectively. Raw biogas was then used as a reactant and pumped into the effluent to simultaneously neutralize pH of the effluent and remove H2S in the biogas. The 2nd stage of electrocoagulation treatment on the neutralized effluent showed that under the selected reaction condition, additional 60% and 10% of turbidity and chemical oxygen demand were further removed. The study concluded a dual-purpose approach for the first time to synergistically combine biogas purification and water reclamation for anaerobic digestion system, which well addresses the downstream challenges of anaerobic digestion technology.

    LanguageEnglish (US)
    Pages483-490
    Number of pages8
    JournalJournal of Hazardous Materials
    Volume285
    DOIs
    StatePublished - Mar 1 2015

    Profile

    Electrocoagulation
    Biofuels
    Digestion
    Water
    biogas
    effluent
    water
    anaerobic digestion
    Anaerobic digestion
    Effluents
    Biogas
    Therapeutics
    Biological Oxygen Demand Analysis
    chemical oxygen demand
    Chemical oxygen demand
    Water Purification
    Phosphorus
    Nitrogen
    Technology
    purification

    Keywords

    • Anaerobic digestion
    • Biogas purification
    • Electrocoagulation
    • Nutrient removal
    • Water reclamation

    ASJC Scopus subject areas

    • Health, Toxicology and Mutagenesis
    • Pollution
    • Waste Management and Disposal
    • Environmental Chemistry
    • Environmental Engineering

    Cite this

    A new multiple-stage electrocoagulation process on anaerobic digestion effluent to simultaneously reclaim water and clean up biogas. / Liu, Zhiguo; Stromberg, David; Liu, Xuming; Liao, Wei; Liu, Yan.

    In: Journal of Hazardous Materials, Vol. 285, 01.03.2015, p. 483-490.

    Research output: Research - peer-reviewArticle

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