Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7077675 | Bioresource Technology | 2014 | 33 Pages |
Abstract
Batch dry-thermophilic anaerobic co-digestion (55 °C) of organic fraction of municipal solid waste (OFMSW) and sewage sludge (SS) for hydrogen production was studied under several sludge combinations (primary sludge, PS; waste activated sludge, WAS; and mixed sludge, MS), TS concentrations (10-25%) and mixing ratios of OFMSW and SS (1:1, 2.5:1, 5:1, 10:1). The co-digestion of OFMSW and SS showed a 70% improvement in hydrogen production rate over the OFMSW fermentation only. The co-digestion of OFMSW with MS showed 47% and 115% higher hydrogen production potential as compared with OFMSW + PS and OFMSW + WAS, respectively. The maximum hydrogen yield of 51 mL H2/g VSconsumed was observed at TS concentration of 20% and OFMSW to MS mixing ratio of 5:1, respectively. The acetic and butyric acids were the main acids in VFAs evolution; however, the higher butyric acid evolution indicated that the H2 fermentation was butyrate type fermentation.
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Authors
Vinay Kumar Tyagi, Rubén Angériz Campoy, C.J. Álvarez-Gallego, L.I. Romero GarcÃa,