Recovery trajectories and community resilience of biofilms in receiving rivers after wastewater treatment plant upgrade

	Recovery trajectories and community resilience of biofilms in receiving rivers after wastewater treatment plant upgrade
	Lin, Hui ; Wang, Qiaojuan ; Zhou, Jie ; Wang, Donglin ; Men, Yujie ; Bai, Yaohui; Qu, Jiuhui
	2021-08
Source Publication	ENVIRONMENTAL RESEARCH
ISSN	0013-9351
Volume	199 Pages:-
Abstract	Wastewater treatment plant (WWTP) upgrades can reduce both nutrient and micropollutant emissions into receiving rivers, thus modifying the composition and function of biological communities. However, how microbial communities vary and whether they can be restored to levels found in less-polluted rivers remains uncertain. Aquatic biofilms are sensitive to environmental change and respond rapidly to bottom-up pressure. Thus, we used 12 flumes configured in three experimental treatments to mimic the dynamic processes of biofilm microbial communities occurring in a wastewater-receiving river following WWTP upgrade, with rivers containing two levels of nutrients and micropollutants used as references. We compared the biofilm microbial biomass, carbon source utilization, and community composition among the three blocks. Results showed that the metabolic patterns of the carbon sources and composition of the biofilm bacterial communities in the flumes mimicking a receiving river with WWTP upgrade recovered over time to those mimicking a less-disturbed river. The restoration of potential carboxylic acid-consuming denitrifying bacteria (i.e., Zoogloea, Comamonas, Dechloromonas, and Acinetobacter) likely played a significant role in this process. Combining quantitative analysis of the denitrification genes nirS and nosZ, we confirmed that the denitrification function of the river biofilms recovered after WWTP upgrade, consistent with our previous field investigation.
Department	中国科学院饮用水科学与技术重点实验室
Keyword	Wastewater treatment plant upgrade Biofilms Carboxylic acid-consuming bacteria Recovery Denitrification
WOS Research Area	Environmental Sciences ; Public, Environmental & Occupational Health
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/46255
Collection	中国科学院饮用水科学与技术重点实验室
Affiliation	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA
Recommended Citation GB/T 7714	Lin, Hui,Wang, Qiaojuan,Zhou, Jie,et al. Recovery trajectories and community resilience of biofilms in receiving rivers after wastewater treatment plant upgrade[J]. ENVIRONMENTAL RESEARCH,2021,199:-.
APA	Lin, Hui.,Wang, Qiaojuan.,Zhou, Jie.,Wang, Donglin.,Men, Yujie.,...&Qu, Jiuhui.(2021).Recovery trajectories and community resilience of biofilms in receiving rivers after wastewater treatment plant upgrade.ENVIRONMENTAL RESEARCH,199,-.
MLA	Lin, Hui,et al."Recovery trajectories and community resilience of biofilms in receiving rivers after wastewater treatment plant upgrade".ENVIRONMENTAL RESEARCH 199(2021):-.

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