Article ID Journal Published Year Pages File Type
7072614 Bioresource Technology 2016 32 Pages PDF
Abstract
Dried pellet of exhausted sugar beet cossettes were digested alone and combined with cow manure as co-substrate in a mesophilic semi-continuous anaerobic system. In single digestion assay, the stable biogas production and stable reactor operation was observed at the hydraulic retention time (HRT) of 20 days (OLR: 3.26 g VS/Lreactor d) which was the minimum HRT tolerated by the system. However, co-digestion with cow manure allowed to decrease the HRT until 15 days (OLR: 4.97 g VS/Lreactor d) with 32% higher biogas generation and efficient reactor operation. Propionic acid was the predominant VFA observed during single digestion assay failure, while acetic acid accumulation was observed in the co-digestion assay. In both single and co-digestion assays, the recovery of digesters was possible by ceasing the feeding and re-inoculation with a well-adapted inoculum.
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Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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