Effects of volatile solid concentration and mixing ratio on hydrogen production by co-digesting molasses wastewater and sewage sludge
- 주제(키워드) Co-digestion , Hydrogen production , Mixing ratio , Molasses wastewater , Response surface methodology , Sewage sludge
- 등재 SCIE, KCI등재, SCOPUS
- 발행기관 Korean Society for Microbiolog and Biotechnology
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000113225
- 본문언어 영어
- Published As http://dx.doi.org/10.4014/jmb.1402.02025
초록/요약
Co-digesting molasses wastewater and sewage sludge was evaluated for hydrogen production by response surface methodology (RSM). Batch experiments in accordance with various dilution ratios (40- to 5-fold) and waste mixing composition ratios (100:0, 80:20, 60:40, 40:60, 20:80, and 0:100, on a volume basis) were conducted. Volatile solid (VS) concentration strongly affected the hydrogen production rate and yield compared with the waste mixing ratio. The specific hydrogen production rate was predicted to be optimal when the VS concentration ranged from 10 to 12 g/l at all the mixing ratios of molasses wastewater and sewage sludge. A hydrogen yield of over 50 ml H2/g VSremoved was obtained from mixed waste of 10% sewage sludge and 10 g/l VS (about 10-fold dilution ratio). The optimal chemical oxygen demand/ total nitrogen ratio for co-digesting molasses wastewater and sewage sludge was between 250 and 300 with a hydrogen yield above 20 ml H2/g VSremoved.
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