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    Phosphate recovery as struvite within a single chamber microbial electrolysis cell

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    Type
    Article
    Authors
    Cusick, Roland D.
    Logan, Bruce E.
    KAUST Grant Number
    KUS-I1-003-13
    Date
    2012-03
    Permanent link to this record
    http://hdl.handle.net/10754/599180
    
    Metadata
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    Abstract
    An energy efficient method of concurrent hydrogen gas and struvite (MgNH 4PO 4·6H 2O) production was investigated based on bioelectrochemically driven struvite crystallization at the cathode of a single chamber microbial electrolysis struvite-precipitation cell (MESC). The MESC cathodes were either stainless steel 304 mesh or flat plates. Phosphate removal ranged from 20% to 40%, with higher removals obtained using mesh cathodes than with flat plates. Cathode accumulated crystals were verified as struvite using a scanning electron microscope capable of energy dispersive spectroscopy (SEM-EDS). Crystal accumulation did not affect the rate of hydrogen production in struvite reactors. The rate of struvite crystallization (g/m 2-h) and hydrogen production (m 3/m 3-d) were shown to be dependent on applied voltage and cathode material. Overall energy efficiencies (substrate and electricity) were high (73±4%) and not dependent on applied voltage. These results show that MESCs may be useful both as a method for hydrogen gas and struvite production. © 2011 Elsevier Ltd.
    Citation
    Cusick RD, Logan BE (2012) Phosphate recovery as struvite within a single chamber microbial electrolysis cell. Bioresource Technology 107: 110–115. Available: http://dx.doi.org/10.1016/j.biortech.2011.12.038.
    Sponsors
    This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Bioresource Technology
    DOI
    10.1016/j.biortech.2011.12.038
    PubMed ID
    22212692
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biortech.2011.12.038
    Scopus Count
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