Bioresource Technology 293 (2019) 122020 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Bacterial community structure and predicted function in an acidogenic sulfate-reducing reactor: Eﬀect of organic carbon to sulfate ratios Jun Li, Min-Hui Cai, Yu Miao, Gan Luo, Wen-Tao Li, Yan Li , Ai-Min Li State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China GRAPHICAL ABSTRACT ARTIC L E I NF O ABSTRAC T Keywords: A lab-scale acidogenic sulfate-reducing reactor with N stripping was continuously operated to uncover its Acidogenic phase reactor microbial mechanism treating highly sulfate-containing organic wastewaters. Results showed that sulfate re- COD/sulfate ratios duction eﬃciency decreased with the inﬂuent COD/sulfate ratios. Microbial community analysis showed that Sulfate reduction VFA accumulation mainly caused by the predominance of fermentative bacteria including Streptococcus and Microbial co-occurrence network Oceanotoga. Genus Desulfovibrio was the most predominant SRB and enriched at low inﬂuent COD/sulfate ratios. PICRUSt analysis Although Biﬁdobacterium, Atopobium, Wohlfahrtiimonas, Dysgonomonas etc. had low average abundance, they were identiﬁed keystone genera by the co-occurrence network analysis. The functions of the microbial com- munity were not insigniﬁcantly inﬂuenced by COD/sulfate ratios. All predicted functional genes involved in dissimilatory sulfate reduction
Bioresource Technology – Elsevier
Published: Dec 1, 2019
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