Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6482527 | Bioresource Technology Reports | 2018 | 34 Pages |
Abstract
Anaerobic digestion has been widely used for organic waste and wastewater treatment to produce renewable energy, especially biogas. Hydrogen sulfide (H2S) being harmful to human beings and the environment is one of the highly toxic compounds in the biogas. For the sake of health and safety, removal of H2S from biogas is necessary before further utilization. In this study, sewage sludge was used to enrich sulfur-oxidizing bacteria (SOB) quickly under weak alkaline condition (pHâ¯=â¯7.5-8.2) in the laboratory and then applied in an industrial-scale desulfurization system. The SOB was successfully enriched in the system within 10â¯days by addition of Na2S. The optimal dissolved oxygen (DO) for producing elemental surfer (S0) in the regeneration tank was 0.8-1.2â¯mg/L. The performance shows that the outlet H2S concentration could be reduced to the safety limit of 200â¯ppm after 2â¯months' operation, achieving a stable H2S removal up to 95%.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
Yanfei Cheng, Tian Yuan, Yang Deng, Cong Lin, Jianhua Zhou, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang,