title: Performance and microbial community of a sequencing batch biofilm reactor treating synthetic mariculture wastewater under long-term exposure to norfloxacin.
abstract: The performance and microbial community of a sequencing batch biofilm reactor (SBBR) treating synthetic mariculture wastewater were evaluated under long-term exposure to norfloxacin (NFX) due to the overuse of antibiotics during the mariculture. The COD and NH4+-N removals had no distinct change at 0-6mgL-1NFX and were inhibited at 6-35mgL-1NFX. The specific oxygen uptake rate (SOUR), specific ammonium oxidation rate (SAOR), specific nitrite oxidation rate (SNOR) and specific nitrate reduction rate (SNRR) of the biofilm kept a decreasing tendency with the increase of NFX concentration from 0 to 35mgL-1. The presence of NFX promoted the microorganisms to secrete more extracellular polymeric substances (EPS) and affected the chemical compositions of EPS. The microbial richness and diversity showed some obvious variations at different NFX concentrations. The present results demonstrated that NFX inhibited the SBBR performance and should decrease the NFX dosage in the mariculture.
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Zheng
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Chang
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Li
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China. Electronic address: mengchungao@outlook.com.
authors.forename: Mengchun
authors.initials: M
authors.lastname: Gao
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Zonglian
authors.initials: Z
authors.lastname: She
authors.affiliation: College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
authors.forename: Xuejiao
authors.initials: X
authors.lastname: Wang
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Guo
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Yangguo
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Chunji
authors.initials: C
authors.lastname: Jin
authors.affiliation: Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
mesh_terms: D017756:Aquaculture / Q000379:methods*; D018441:Biofilms; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D059014:High-Throughput Nucleotide Sequencing; D059013:Microbial Consortia / Q000187:drug effects* / Q000235:genetics; D009566:Nitrates / Q000378:metabolism; D058465:Nitrification; D009643:Norfloxacin / Q000494:pharmacology*; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater
chemical_list: D009566:Nitrates; D009643:Norfloxacin; D062065:Wastewater
keywords: Mariculture; Microbial activity; Microbial diversity; Norfloxacin; SBBR