Micropollutants affect volatile fatty acids production during anaerobic fermentation of waste activated sludge
Most of the reported studies on micropollutants harbored in waste activated sludge (WAS) focused on its biodegradation during sludge bioconversion and bioproducts generation,and little attention was paid to the influence of those micropollutants on the identical process.Herein,the effect of nonylphenol (NP) and phenanthrene (a representative polycyclic aromatic hydrocarbons (PAHs)),which were typical micropollutants and widespreadly appeared in WAS,on anaerobic fermentation of WAS for volatile fatty acids (VFAs) accumulation was investigated.Experimental results showed that the concentration of VFAs derived from WAS was increased in the presence of NP and phenanthrene during anaerobic fermentation.The maximum VFAs production was achieved with 200 mg/kg dry sludge NP and 100 mg/kg dry sludge phenanthrene and acetic acid was predominant enhanced components via determining individual VFA.Mechanism exploration revealed that the present NP and phenanthrene mainly affected the acidification process of anaerobic fermentation and caused the shift of the microbial community to benefit the accumulation of acetic acid.Further investigation by the pure acetogen revealed that both the viability and activity of Proteiniphilum acetatigenes were improved by NP and phenanthrene during anaerobic fermentation,resulting in more production of acetic acid and showing good agreement with that in the real WAS fermentation systems.
Waste activated sludge Anaerobic fermentation Nonylphenol Polycyclic aromatic hydrocarbons
Xu Duan Leiyu Feng Yuanyuan Yan Qi Zhou
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and E Research & Service Center for Environmental Industry, Yancheng 224051, Jiangsu Province, China
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
307-310
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）