Journal
ENZYME AND MICROBIAL TECHNOLOGY
Volume 42, Issue 1, Pages 6-10Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.enzmictec.2007.07.014
Keywords
granular sludge; anaerobic reactor cascade; fruit canning wastewater; single-stage UASB; two-stage UASB
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The influence of the hydraulic retention time on the microbial activity has been investigated, using a single methanization stage and a cascade of two upflow anaerobic sludge bed (UASB) reactors. The latter process scheme was clearly superior treating a synthetic fruit canning wastewater. For a COD reduction of 90%, a retention time of around 9-10 h was required in a single-stage UASB, while 4-5 h were sufficient in the two-stage mode of operation. In this case, the total volume of the methanization cascade was reduced by 50% compared to the single-stage one. (C) 2007 Elsevier Inc. All rights reserved.
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