Bioresource Technology 249 (2018) 943–952 Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier.com/locate/biortech Role of acid/alkali-treatment in primary sludge anaerobic fermentation: Insights into microbial community structure, functional shifts and metabolic output by high-throughput sequencing a a,b a,b, a Xiao Huang , Wenyi Dong , Hongjie Wang , Yangyang Feng School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen 518055, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: This study aimed to investigate the eﬀect of acid- or alkali-treatment on volatile fatty acids (VFAs) production Primary sludge and microbiological mechanism during primary sludge anaerobic fermentation. Seven fermentation experiments Anaerobic fermentation were conducted at diﬀerent pH (3−12). Results showed that the optimal pH was 10 for accumulation of VFAs. High-throughput sequencing High-throughput sequencing results indicated that acid and alkali treatment could inhibit Microbial community Erysipelotrichaceae_UCG-004 and norank_p_Aminicenantes, instead of promoting Pseudomonas and Tissierella at Functional shifts acidic and alkaline condition, respectively. Besides, molecular ecological networks (MENs) analysis and multi- Metabolic output variate canonical correspondence analysis (CCA) revealed that the microbial community interactions are sig- niﬁcant diﬀerent between acid
Bioresource Technology – Elsevier
Published: Feb 1, 2018
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