Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 1, Pages 263-274Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.10.237
Keywords
COD/SO42- ratio; Biohythane production; Rubber sheet wastewater; Trace element availability; Two-stage anaerobic digestion
Categories
Funding
- Research and Development Institute Thaksin University
- Thailand Science Reserach and Inovation
- Thailand Research Fund [PHD59I0069, RTA6280001, RSA6180048]
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The sulfate-reducing bacteria (SRB) consortium (Desulfovibrio sp. Desulfitibacter sp. Dethiosulfatibacter sp. and Clostridium sp.) was investigated for sulfate removal and biohythane production from rubber sheet wastewater (RSW). The RSW at COD/SO42- ratio of 13 and pH 6 was suitable for sulfate reduction and biohythane production. Hydrogen yield, sulfate emoval efficiency, and methane yield were 101 mL H-2.gVS(-1), 87%, and 629 mL CH4.gVS(-1), respectively. The hydrogen and methane production rate was 14.53 mL H-2.d(-1) and 45 mL CH4.d(-1), respectively. Hydrogen effluent with trace element supplemented improved hydrolysis rate (k(h)) from 0.19 d(-1) to 0.23 d(-1) and methane production rate from 31-48 to 42 -97 mL CH4.d(-1). The COD removal of RSW in acidogenic stage and methane stage was 11.3% and 72.4-76.2%, respectively. The sulfate removal of RSW in acidogenic stage and methane stage was 87% and 9%, respectively. Two-stage anaerobic fermentation obtained simultaneous biohythane production and sulfate removal with efficiently for energy recovery from RSW. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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