Effect of effluent recirculation rate on the performance of anaerobic bio-filter treating coal gasification wastewater under co-digestion conditions
In: RSC Advances, Jg. 6 (2016), S. 87926-87934
Online
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Zugriff:
In this paper, anaerobic biofilters (AF) were adopted for anaerobic co-digestion of potato starch wastewater (PSW) and coal gasification wastewater (CGW). A modified Gompertz equation was used for the analysis. With a ratio of PSW:CGW at 1:1 for the influent, it remarkably improved the removal effect of (chemical oxygen demand) COD and total phenol. With an influent concentration of COD of 2600 mg L−1 and total phenol 200 mg L−1, the effluent COD and total phenol could be decreased to 1100 mg L−1 and 100 mg L−1, respectively. The methane production rate was generally above 260 (mL CH4 per g per d). In order to further enhance the performance of the system, the strategy of effluent recirculation on co-digestion was adopted. The result indicated that under a low effluent recirculation rate of 0.5, concentrations of COD and total phenol in effluent could reach as low as 800 and 70 mg L−1, respectively. Also, the methane production rate was around 300 (mL CH4 per g per d). High-throughput sequencing showed the microbial phyla Bacteroidetes, Chloroflexi, Euryarchaeota, Firmicutes dominanted the system and the abundance variation was observed at different effluent recirculation rates.
Titel: |
Effect of effluent recirculation rate on the performance of anaerobic bio-filter treating coal gasification wastewater under co-digestion conditions
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Autor/in / Beteiligte Person: | Wu, Xiaogang ; Yu, Zhenjiang ; Tabassum, Salma ; Zhang, Xiaojun ; Zhang, Zhenjia ; Song, Yaping ; Li, Yajie ; Chu, Chunfeng |
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Zeitschrift: | RSC Advances, Jg. 6 (2016), S. 87926-87934 |
Veröffentlichung: | Royal Society of Chemistry (RSC), 2016 |
Medientyp: | unknown |
ISSN: | 2046-2069 (print) |
DOI: | 10.1039/c6ra18363h |
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