Bacterial stress enrichment enhances anaerobic hydrogen production in cattle manure sludge

Applied Microbiology and Biotechnology
Dae-Yeol Cheong, Conly L Hansen

Abstract

Methodology was evaluated to selectively enrich hydrogen-producing species present in biological sludge produced during organic wastewater treatment. The influence of bacterial stress enrichment on anaerobic hydrogen-producing microorganisms was investigated in batch tests using serum bottles. Enrichment conditions investigated included application of acute physical and chemical stresses: wet heat, dry heat and desiccation, use of a methanogen inhibitor, freezing and thawing, and chemical acidification with and without preacidification of the sludge at pH 3. For each enrichment sample, cultivation pH value was set at an initial value of 7. After application of selective enrichment (by bacterial stress), hydrogen production was significantly higher than that of untreated original sludge. Hydrogen production from the inocula with bacterial stress enrichment was 1.9-9.8 times greater when compared with control sludge. Chemical acidification using perchloric acid showed the best hydrogen production potential, irrespective of preacidification. Enhancement is due to the selective capture of hydrogen-producing sporeformers, which induces altered anaerobic fermentative metabolism.

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Citations

Feb 7, 2007·Biotechnology Letters·Jeremy T Kraemer, David M Bagley
Nov 6, 2013·Biotechnology Letters·Regiane Priscila RattiMaria Bernadete Amâncio Varesche
Jan 16, 2016·International Journal of Molecular Sciences·Vinayak Laxman PachapurAntonio Avalos Ramirez
Sep 2, 2011·Journal of Hazardous Materials·Donglei WuGuangming Tian
Nov 17, 2006·Bioresource Technology·Dae-Yeol Cheong, Conly L Hansen
May 13, 2015·Ecotoxicology and Environmental Safety·B DeepanrajS Jayaraj
Apr 17, 2015·Journal of Environmental Management·M A Zumar BundhooM Ali Hassan
Oct 29, 2015·Environmental Science and Pollution Research International·Shantonu Roy, Debabrata Das
May 20, 2010·Water Environment Research : a Research Publication of the Water Environment Federation·Hua CaiRachel A Brennan
May 4, 2020·The Science of the Total Environment·Sharma MonaArivalagan Pugazhendhi

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