Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

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    Sulfide response analysis for sulfide control using a pS electrode in sulfate reducing bioreactors
    Villa Gomez, D.K. ; Cassidy, J. ; Keesman, K.J. ; Sampaio, R.M. ; Lens, P.N.L. - \ 2014
    Water Research 50 (2014). - ISSN 0043-1354 - p. 48 - 58.
    afvalwaterbehandeling - bioreactoren - sulfiden - waste water treatment - bioreactors - sulfides - anaerobic-digestion process - acid-mine drainage - waste-water treatment - stirred-tank reactor - zns precipitation - hydrogen-sulfide - control design - reduction - bacteria - culture
    Step changes in the organic loading rate (OLR) through variations in the influent chemical oxygen demand (CODin) concentration or in the hydraulic retention time (HRT) at constant COD/SO4 2- ratio (0.67) were applied to create sulfide responses for the design of a sulfide control in sulfate reducing bioreactors. The sulfide was measured using a sulfide ion selective electrode (pS) and the values obtained were used to calculate proportional-integral-derivative (PID) controller parameters.
    Step changes in the organic loading rate (OLR) through variations in the influent chemical oxygen demand (CODin) concentration or in the hydraulic retention time (HRT) at constant COD/SO42- ratio (0.67) were applied to create sulfide responses for the design of a sulfide control in sulfate reducing bioreactors. The sulfide was measured using a sulfide ion selective electrode (pS) and the values obtained were used to calculate proportional-integral -derivative (PID) controller parameters. The experiments were performed in an inverse fluidized bed bioreactor with automated operation using the LabVIEW software version 2009 (R). A rapid response and high sulfide increment was obtained through a stepwise increase in the CODin, concentration, while a stepwise decrease to the HRT exhibited a slower response with smaller sulfide increment. Irrespective of the way the OLR was decreased, the PS response showed a time-varying behavior due to sulfide accumulation (HRT change) or utilization of substrate sources that were not accounted for (CODin change). The pS electrode response, however, showed to be informative for applications in sulfate reducing bioreactors. Nevertheless, the recorded pS values need to be corrected for pH variations and high sulfide concentrations (>200 mg/L). (C) 2013 Elsevier Ltd. All rights reserved.
    Simultaneous sulfate reduction and metal precipitation in an inverse fluidized bed reactor
    Villa Gomez, D.K. - \ 2013
    Wageningen University. Promotor(en): Piet Lens, co-promotor(en): Karel Keesman. - [S.l.] : S.n. - ISBN 9789461737410 - 194
    wervelbedden - uitrusting - sulfaatreductie - chemische precipitatie - metalen - fluidized beds - equipment - sulfate reduction - chemical precipitation - metals
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