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  • 1.
    Kurniawan, T.
    et al.
    Department of Food and Agricultural Product Technology, Universitas Gadjah Mada.
    Lukitawesa, Lukitawesa
    University of Borås, Faculty of Textiles, Engineering and Business.
    Hanifah, I.
    Department of Food and Agricultural Product Technology, Universitas Gadjah Mada.
    Wikandari, R.
    Department of Food and Agricultural Product Technology, Universitas Gadjah Mada.
    Millati, R.
    Department of Food and Agricultural Product Technology, Universitas Gadjah Mada.
    Taherzadeh, Mohammad J
    University of Borås, Faculty of Textiles, Engineering and Business.
    Niklasson, C.
    Chalmers.
    Semi-continuous reverse membrane bioreactor in two-stage anaerobic digestion of citruswaste2018In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 11, no 8, article id 1341Article in journal (Refereed)
    Abstract [en]

    Abstract

    The presence of an antimicrobial compound called D-Limonene in citrus waste inhibits methane production from such waste in anaerobic digestion. In this work, a two-stage anaerobic digestion method is developed using reverse membrane bioreactors (rMBRs) containing cells encased in hydrophilic membranes. The purpose of encasement is to retain a high cell concentration inside the bioreactor. The effectiveness of rMBRs in reducing cell washout is evaluated. Three different system configurations, comprising rMBRs, freely suspended cells (FCs), and a combination of both (abbreviated to rMBR–FCs), are incubated at three different organic loading rates (OLRs) each, namely 0.6, 1.2, and 3.6 g COD/(L cycle). Incubation lasts for eight feeding cycles at 55 °C. Methane yield and biogas composition results show that rMBRs perform better than rMBR–FCs and FCs at all three OLRs. Volatile fatty acid profiles and H2 production show that the reactors are working properly and no upset occurs. Additionally, a short digestion time of 4 days can be achieved using the rMBR configuration in this study.

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