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Responses of microbial interactions to elevated salinity in activated sludge microbial community

Frontiers of Environmental Science & Engineering 2023年第5期17卷 93-103页

作者： Tao Ya Zhimin Wang Junyu Liu Minglu Zhang Lili Zhang Xiaojing Liu Yuan Li Xiaohui Wang Beijing Engineering Research Center of Environmental Material for Water Purification College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China State Environmental Protection Key Laboratory of Food Chain pollution Control Beijing Technology and Business UniversityBeijing 100048China Puyang Vocational and Technical College Puyang 457000China

Biological treatment processes are critical for sewage purification,wherein microbial interactions are tightly associated with treatment *** studies have focused on assessing how environmental factors(such as salinity)affect the diversity and composition of the microbial community but ignore the connections among ***,we described the microbial interactions in response to elevated salinity in an activated sludge system by performing an association network *** was found that higher salinity resulted in low microbial diversity,and small,complex,more competitive overall networks,leading to poor performance of the treatment *** of major phyla(Proteobacteria,Bacteroidetes,and Chloroflexi)and functional bacteria(such as AOB,NOB and denitrifiers)differed substantially under elevated salinity *** with subnetworks of Nitrosomonadaceae,Nitrosomonas(AOB)made a greater contribution to nitrification under higher salinity(especially 3%)in the activated sludge *** established more proportion of cooperative relationships with other bacteria to resist 3%salinity ***,identified keystone species playing crucial roles in maintaining process stability were dynamics and less abundant under salinity *** gleaned from this study deepened our understanding of microbial interaction in response to elevated salinity in activated sludge systems.

关键词： Elevated salinity Activated sludge system pollution removal Microbial interactions Competitive relationship

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