Microbial communities and their performances in anaerobic hybrid sludge bed-fixed film reactor for treatment of palm oil mill effluent under various organic pollutant concentrations

Journal article

Authors/Editors

Strategic Research Themes

No matching items found.

Publication Details

Author list: Meesap K., Boonapatcharoen N., Techkarnjanaruk S., Chaiprasert P.

Publisher: Hindawi

Publication year: 2012

Journal: Journal of Biomedicine and Biotechnology (1110-7243)

Volume number: 2012

ISSN: 1110-7243

eISSN: 1110-7251

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866149965&doi=10.1155%2f2012%2f902707&partnerID=40&md5=021ed22b9c829eff16a16cfd03f6db39

Languages: English-Great Britain (EN-GB)

View in Web of Science | View on publisher site | View citing articles in Web of Science

Abstract

The anaerobic hybrid reactor consisting of sludge and packed zones was operated with organic pollutant loading rates from 6.2 to 8.2 g COD/L day, composed mainly of suspended solids (SS) and oil and grease (O&G) concentrations between 5.2 to 10.2 and 0.9 to 1.9 g/L, respectively. The overall process performance in terms of chemical oxygen demands (COD), SS, and O&G removals was 73, 63, and 56, respectively. When the organic pollutant concentrations were increased, the resultant methane potentials were higher, and the methane yield increased to 0.30 L CH4/g CODremoved. It was observed these effects on the microbial population and activity in the sludge and packed zones. The eubacterial population and activity in the sludge zone increased to 6.4 ื 109 copies rDNA/g VSS and 1.65 g COD/g VSS day, respectively, whereas those in the packed zone were lower. The predominant hydrolytic and fermentative bacteria were Pseudomonas, Clostridium, and Bacteroidetes. In addition, the archaeal population and activity in the packed zone were increased from to 9.1 ื 107 copies rDNA/g VSS and 0.34 g COD-CH4/g VSS day, respectively, whereas those in the sludge zone were not much changed. The most represented species of methanogens were the acetoclastic Methanosaeta, the hydrogenotrophic Methanobacterium sp., and the hydrogenotrophic Methanomicrobiaceae. ฉ 2012 Kanlayanee Meesap et al.

Keywords