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Effect of hydraulic retention time on suppression of methanogens during a continuous biohydrogen production process using molasses wastewater

Title
Effect of hydraulic retention time on suppression of methanogens during a continuous biohydrogen production process using molasses wastewater
Authors
Yun, Jeong HeeCho, Kyung-Suk
Ewha Authors
조경숙
SCOPUS Author ID
조경숙scopus
Issue Date
2017
Journal Title
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
ISSN
1093-4529JCR Link1532-4117JCR Link
Citation
vol. 52, no. 1, pp. 37 - 44
Keywords
BiohydrogenHRT controlmethanogenesismolasses wastewatersuppression
Publisher
TAYLOR & FRANCIS INC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
This study was undertaken to investigate the reduction of the hydraulic retention time (HRT) to decrease methane generation and recover hydrogen production during the long-term operation of biohydrogen production in a continuous stirred tank reactor (CSTR) using molasses wastewater. Reduction of HRT can be a simple and economic method to immediately control unfavorable methane generated during continuous operation of a hydrogen production system. The steady-state performance of the CSTR showed a hydrogen content of 41.3 +/- 3.30% and a hydrogen production rate (HPR) of 63.7 +/- 10.01 mmol-H(2)L(-1)d(-1) under an organic loading rate (OLR) of 29.7 g CODL-1 at an HRT of 24 h. Increase in the methane level above 40% during long-term operation caused decrease in the hydrogen content and HPR to 5.9 +/- 1.6% and 2.1 +/- 1.1 mmoL-H(2)L(-1)d(-1), respectively. When methane increased to a high level over 40%, the CSTR at the HRT of 24 h was operated at the HRT of 12 h. Reduction of the HRT from 24 to 12 h led to decrease in the methane content of 12.1 +/- 4.44% and recovery of the HPR value to 48.9 +/- 15.37 mmol-H(2)L(-1)d(-1) over a duration of 13-22 d. When methane is generated in a continuously operated reactor, reduction of the HRT can be an easy way to suppress methanogens and recover hydrogen production without any additives or extra treatments.
DOI
10.1080/10934529.2016.1221221
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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