Insights into redox mediator supplementation on enhanced volatile fatty acids production from waste activated sludge

被引:0
作者
Jingang Huang
Susu Chen
Weihong Wu
Huiping Chen
Kangyin Guo
Junhong Tang
Jianping Li
机构
[1] Hangzhou Dianzi University,College of Materials and Environmental Engineering
[2] Zhejiang University,College of Biosystems Engineering and Food Science
来源
Environmental Science and Pollution Research | 2019年 / 26卷
关键词
Sludge; Fermentation; Riboflavin; Lawsone; Protein; Carbohydrate;
D O I
暂无
中图分类号
学科分类号
摘要
Anaerobic fermentation of waste activated sludge (WAS) for recycling valuable volatile fatty acids (VFAs) is economically valuable. However, the fermentation of protein is the rate-limiting step of VFA production with WAS as a substrate. In this study, the effect of redox mediators (RMs, i.e., riboflavin and lawsone) on the enhanced production of VFAs from WAS was investigated. The results indicate that both RMs can promote protein-dependent fermentation, increasing maximum VFA accumulation by 43.9% and 42.5% respectively. In cultures supplemented with riboflavin and lawsone, VFA production was highly correlated with protease activities, but not with α-glucosidase activities. This implies that RMs affected the redox reaction of amino acids degradation, resulting in an increased release of ammonia. Sequencing results showed that RMs significantly increased the abundance of bacteria related to VFA fermentation and protein/amino acid degradation at the levels of phylum, class, order, family, and even genus.
引用
收藏
页码:27052 / 27062
页数:10
相关论文
共 249 条
[11]  
Brutinel ED(2012)Amino acid fermentation at the origin of the genetic code Biol Direct 7 6-217
[12]  
Gralnick JA(2016)Effect of nonylphenol on volatile fatty acids accumulation during anaerobic fermentation of waste activated sludge Water Res 105 209-250
[13]  
Cervantes FJ(2014)Enhanced anaerobic digestion of waste activated sludge digestion by the addition of zero valent iron Water Res 52 242-1469
[14]  
Van Der Velde S(2018)Pre-treatments to enhance the biodegradability of waste activated sludge: elucidating the rate limiting step Biotechnol Adv 36 1434-66
[15]  
Lettinga G(2017)Study of microbial community plasticity for anaerobic digestion of vegetable waste in anaerobic baffled reactor Renew Energy 101 59-1479
[16]  
Field JA(2018)Sulfamethazine (SMZ) affects fermentative short-chain fatty acids production from waste activated sludge Sci Total Environ 639 1471-15
[17]  
Chen Y(2018)Effect of diclofenac on the production of volatile fatty acids from anaerobic fermentation of waste activated sludge Bioresour Technol 254 7-8724
[18]  
Jiang S(2018)Degradation of organics extracted from dewatered sludge by alkaline pretreatment in microbial electrolysis cell Environ Sci Pollut Res 25 8715-30
[19]  
Yuan H(2016)Effects of bio-surfactants combined with alkaline conditions on volatile fatty acid production and microbial community in the anaerobic fermentation of waste activated sludge Int Biodeterior Biodegradation 114 24-86
[20]  
Zhou Q(2016)Volatile fatty acids produced by co-fermentation of waste activated sludge and henna plant biomass Bioresour Technol 211 80-102