The performance of a phase separated granular bed bioreactor treating brewery wastewater

M. I. Baloch, Joseph C. Akunna, Phillip J. Collier

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

This study presents the performance characteristics of a plug flow phase separated anaerobic granular bed baffled reactor (GRABBR) fed with brewery wastewater at various operating conditions. The reactor achieved chemical oxygen demand (COD) removal of 93–96% with high methane production when operated at organic loading rates (OLRs) of 2.16–13.38 kg COD m−3 d−1. The reactor configuration and microbial environment encouraged the acidogenic dominant zone to produce intermediate products suitable for degradation in the predominantly methanogenic zone. Noticeable phase separation between acidogenesis and methanogenesis mainly occurred at high OLR, involving a greater number of compartments to contribute to wastewater treatment. The highly active nature and good settling characteristics of methanogenic granular sludge offered high biomass retention and enhanced methanogenic activities within the system. The granular structure in the acidogenic dominant zone of the GRABBR was susceptible to disintegration and flotation. Methanogenic granular sludge was a multi-layered structure with Methanosaeta-like organisms dominant in the core
Original languageEnglish
Pages (from-to)1849-1855
Number of pages7
JournalBioresource Technology
Volume98
Issue number9
DOIs
Publication statusPublished - Jul 2007

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