期刊
BIORESOURCE TECHNOLOGY
卷 200, 期 -, 页码 587-597出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.10.036
关键词
Waste activated sludge; Low temperature fermentation; Hydrolytic acidification; Alkali type; Microbial community
资金
- Natural Science Foundation of China [51178007]
- project of scientific research base and scientific innovation platform of Beijing municipal education commission
- project of scientific research base and scientific innovation platform
The effect of four alkali reagents (NaOH, KOH, Ca(OH)(2), mixed alkali) on waste activated sludge (WAS) hydrolytic acidification and microbial community was studied in semi-continuous fermentation systems at low temperature (15 degrees C) over long term operational time (65 day). The results showed that protein and polysaccharide of NaOH (124.26, 11.92) was similar to that of KOH (109.53, 11.30), both were higher than Ca(OH)(2) (70.66, 3.74) and mixed alkali (90.66, 8.71). The short chain fatty acids (SCFAs) of NaOH (231.62) was higher than KOH (220.62 mg chemical oxygen demand (COD)/g VSS). Although Ca(OH)(2) system had strong acidification capacity, the shortage of SCFAs occurred due to the low activity of hydrolase. Illumina MiSeq sequencing revealed that Tissierella and Erysipelothrix were enriched in the NaOH and Ca(OH)(2) systems, where Peptostreptococcaceae incertae_sedis was enriched in the NaOH and KOH systems, less Anaerolinea was involved in Ca(OH)(2) condition. (C) 2015 Published by Elsevier Ltd.
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