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Stable operation during pilot-scale anaerobic digestion of nutrient-supplemented maize/sugar beet silage
Department of Biotechnology, Lund Univeristy.
Linköpings universitet, Institutionen för tema, Tema vatten i natur och samhälle. Linköpings universitet, Filosofiska fakulteten.
Department of Biotechnology, Lund University.
2012 (Engelska)Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 118, s. 445-454Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Biogas production from maize/sugar beet silage was studied under mesophilic conditions in a continuous stirred tank reactor pilot-scale process. While energy crop mono-digestion is often performed with very long hydraulic retention times (HRTs), the present study demonstrated an efficient process operating with a 50-day HRT and a corrected total solids (TScorr) based organic loading rate of 3.4 kg/m3×d. The good performance was attributed to supplementation with both macro- and micronutrients and was evidenced by good methane yields (318 m3/ton TScorr) which were comparable to laboratory maximum expected yields plus low total volatile fatty acid concentrations (< 0.8 g/L). A viscoplastic and thixotropic digester fluid behaviour was observed, and the viscosity problems common in crop mono-digestion were not seen in this study. The effluent also complied with Swedish certification standards for bio-fertilizer for farmland application. Nutrient addition thus rendered a stable biogas process, while the effluent was a good quality bio-fertilizer.

Ort, förlag, år, upplaga, sidor
Elsevier, 2012. Vol. 118, s. 445-454
Nyckelord [en]
Bio-fertilizer, Biogas, Energy crops, Macronutrients, Micronutrients
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:liu:diva-81648DOI: 10.1016/j.biortech.2012.05.096ISI: 000307259600060OAI: oai:DiVA.org:liu-81648DiVA, id: diva2:555439
Tillgänglig från: 2012-09-20 Skapad: 2012-09-20 Senast uppdaterad: 2017-12-07

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