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The attachment potential and N-acyl-homoserine lactone-based quorum sensing in aerobic granular sludge and algal-bacterial granular sludge.
Zhang, Bing; Lens, Piet N L; Shi, Wenxin; Zhang, Ruijun; Zhang, Zhiqiang; Guo, Yuan; Bao, Xian; Cui, Fuyi.
Afiliação
  • Zhang B; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
  • Lens PNL; UNESCO-IHE, P.O. Box 3015, 2601 DA, Delft, The Netherlands.
  • Shi W; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China. swx@hit.edu.cn.
  • Zhang R; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
  • Zhang Z; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
  • Guo Y; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
  • Bao X; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
  • Cui F; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China. mdjzjl@163.com.
Appl Microbiol Biotechnol ; 102(12): 5343-5353, 2018 Jun.
Article em En | MEDLINE | ID: mdl-29696336
Bacteria and algae often coexist in the aerobic granular sludge (AGS) system in a photo-bioreactor, forming algal-bacterial granular sludge. In this study, the physicochemical characteristics and microbial attachment potential of the AGS and algal-bacterial granular sludge were comparatively analyzed. Results clearly showed that the larger and denser algal-bacterial granular sludge had stronger attachment potential compared to the AGS (as the control). A bioassay with Agrobacterium tumefaciens KYC55 indicated that N-acyl-homoserine lactones (AHLs) existed in both sludge types, but further investigations revealed that the relative AHL content of the algal-bacterial granular sludge obviously increased and slightly decreased during phases II and III, respectively, but was consistently higher than the AGS. Based on the EPS measurements and 3D-excitation-emission matrix (3D-EEM) fluorescence spectra analysis, the enhancement of AHL-based QS favored the hydrophobic protein production of algal-bacterial granular sludge, contributing to a good development of the granular sludge. In addition, it was also found that inhibition of AHLs resulted in the reduction of the protein content and attachment potential in algal-bacterial granular sludge, which was unfavorable to the structural stability of the granules. High-throughput sequencing analysis showed that the microbial community of AGS was different from the algal-bacterial granular sludge; specifically, algal-bacterial granulation facilitated the abundance of AHLs and EPS producers, such as the genera Acinetobacter, Chryseobacterium, and Flavobacterium.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esgotos / Fenômenos Fisiológicos Bacterianos / Reatores Biológicos / Percepção de Quorum / Acil-Butirolactonas Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Esgotos / Fenômenos Fisiológicos Bacterianos / Reatores Biológicos / Percepção de Quorum / Acil-Butirolactonas Idioma: En Ano de publicação: 2018 Tipo de documento: Article