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Immobilized-microbial bioaugmentation protects aerobic denitrification from heavy metal shock in an activated-sludge reactor
Yu, Xuan1,2; Shi, Juanjuan1; Khan, Aman1; Yun, Hui1; Zhang, Pengyun2; Zhang, Peng2; Kakade, Apurva1; Tian, Yanrong3; Pei, Yaxin1; Jiang, Yiming1; Huang, Haiying1; Wu, Kejia1; Li, XK(李祥锴)1
Indexed ByEI
2020
Source PublicationBioresource Technology
ISSN18732976
Volume307
AbstractThe inhibition of denitrification by heavy metals is a problem in nitrogen wastewater treatment, but the solutions are rarely studied. In this study, Pseudomonas brassicacearum LZ-4, immobilized in sodium alginate-kaolin, was applied in an activated-sludge reactor to protect denitrifiers from hexavalent chromium (Cr(VI)). Q-PCR result showed that the strain LZ-4 was incorporated into activated sludge under the help of immobilization. In the non-bioaugmentation system, the removal efficiency of nitrate was decreased by 86.07% by 30 mg/L Cr(VI). Whereas, denitrification was protected and 95% of nitrate was removed continuously in immobilized-cell bioaugmentation system. Miseq sequencing data showed that bioaugmentation decreased the impact of Cr(VI) on microbial communities and increased the abundance of denitrifiers. Based on the results of biomass and extracellular polymers, activated sludge was protected from Cr(VI) toxicity. This discovery will provide a feasible technique for nitrogen wastewater treatment in the presence of distressing heavy metals.
© 2020 Elsevier Ltd
DOI10.1016/j.biortech.2020.123185
Funding Project[31870082] ; [17ZD2WA017] ; Fundamental Research Funds for the Central Universities[lzujbky-2017-br01]
PublisherElsevier Ltd
EI Accession Number20201408374537
EI KeywordsCell culture ; Chemicals removal (water treatment) ; Denitrification ; Heavy metals ; Nitrates ; Nitrogen ; Radioactive waste vitrification ; Sodium alginate ; Wastewater treatment
EI Classification NumberIndustrial Wastes Treatment and Disposal:452.4 ; Metallurgy and Metallography:531 ; Chemical Reactions:802.2 ; Chemical Products Generally:804
Original Document TypeJournal article (JA)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/423144
Collection生命科学学院
Corresponding AuthorLi, Xiangkai
Affiliation1.Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000; Gansu, China
2.Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Gansu Academy of Membrane Science and Technology, Lanzhou 730020; Gansu, China
3.PetroChina Lanzhou Petrochemical Company, yumenjie#10, Lanzhou 730060; Gansu, China
First Author AffilicationLanzhou University
Corresponding Author AffilicationLanzhou University
Recommended Citation
GB/T 7714
Yu, Xuan,Shi, Juanjuan,Khan, Aman,et al. Immobilized-microbial bioaugmentation protects aerobic denitrification from heavy metal shock in an activated-sludge reactor[J]. Bioresource Technology,2020,307.
APA Yu, Xuan.,Shi, Juanjuan.,Khan, Aman.,Yun, Hui.,Zhang, Pengyun.,...&Li, Xiangkai.(2020).Immobilized-microbial bioaugmentation protects aerobic denitrification from heavy metal shock in an activated-sludge reactor.Bioresource Technology,307.
MLA Yu, Xuan,et al."Immobilized-microbial bioaugmentation protects aerobic denitrification from heavy metal shock in an activated-sludge reactor".Bioresource Technology 307(2020).
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