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  • Effect of additives on process stability of mesophilic anaerobic monodigestion of pig slaughterhouse waste

    Author(s)
    Bayr, S
    Pakarinen, O
    Korppoo, A
    Liuksia, S
    Väisänen, A
    Kaparaju, P
    Rintala, J
    Griffith University Author(s)
    Kaparaju, Prasad
    Year published
    2012
    Metadata
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    Abstract
    The effect of two additives on anaerobic monodigestion of pig slaughterhouse waste was studied in three laboratory scale continuously stirred tank reactors (CSTRs) operated for 242–284 days at 35 °C. A higher organic loading rate (OLR), namely 2.25 kg volatile solids (VS)/m3 d with a hydraulic retention time (HRT) of 30 d was feasible with an additive containing Fe, HCl and trace elements while an OLR of 1.5 kg VS/m3 d (HRT 30 d) led to instabilities in CSTR with an additive consisting of Fe and HCl and in CSTR without additives. Methane yields of ca. 700 dm3 CH4/kg VSfed were obtained in all reactors under stable conditions. ...
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    The effect of two additives on anaerobic monodigestion of pig slaughterhouse waste was studied in three laboratory scale continuously stirred tank reactors (CSTRs) operated for 242–284 days at 35 °C. A higher organic loading rate (OLR), namely 2.25 kg volatile solids (VS)/m3 d with a hydraulic retention time (HRT) of 30 d was feasible with an additive containing Fe, HCl and trace elements while an OLR of 1.5 kg VS/m3 d (HRT 30 d) led to instabilities in CSTR with an additive consisting of Fe and HCl and in CSTR without additives. Methane yields of ca. 700 dm3 CH4/kg VSfed were obtained in all reactors under stable conditions. Both additives decreased H2S concentration of the biogas below detection limit 0.5 ppm while in a control reactor H2S concentration was up to 1900 ppm. In conclusion, the results suggest the possibility that additives may facilitate higher OLRs in monodigestion of pig slaughterhouse waste.
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    Journal Title
    Bioresource Technology
    Volume
    120
    DOI
    https://doi.org/10.1016/j.biortech.2012.06.009
    Subject
    Environmental engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/173658
    Collection
    • Journal articles

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