1
|
Chen DZ, Qiu J, Sun H, Liu Y, Ye J, Chen JM, Lu L. Enhanced chlorobenzene removal by internal magnetic field through initial cell adhesion and biofilm formation. Appl Microbiol Biotechnol 2024; 108:159. [PMID: 38252324 PMCID: PMC10803521 DOI: 10.1007/s00253-024-13001-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 12/26/2023] [Accepted: 12/30/2023] [Indexed: 01/23/2024]
Abstract
Magnetic fields (MF) have been proven efficient in bioaugmentation, and the internal MFs have become competitive because they require no configuration, despite their application in waste gas treatment remaining largely unexplored. In this study, we firstly developed an intensity-regulable bioaugmentation with internal MF for gaseous chlorobenzene (CB) treatment with modified packing in batch bioreactors, and the elimination capacity increased by up to 26%, surpassing that of the external MF. Additionally, the microbial affinity to CB and the packing surface was enhanced, which was correlated with the ninefold increased secreted ratio of proteins/polysaccharides, 43% promoted cell surface hydrophobicity, and half reduced zeta potential. Furthermore, the dehydrogenase content was promoted over 3 times, and CB removal steadily increased with the rising intensity indicating enhanced biofilm activity and reduced CB bioimpedance; this was further supported by kinetic analysis, which resulted in improved cell adhesive ability and biological utilisation of CB. The results introduced a novel concept of adjustable magnetic bioaugmentation and provided technical support for industrial waste gas treatments. KEY POINTS: • Regulable magnetic bioaugmentation was developed to promote 26% chlorobenzene removal • Chlorobenzene mineralisation was enhanced under the magnetic field • Microbial adhesion was promoted through weakening repulsive forces.
Collapse
Affiliation(s)
- Dong-Zhi Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
- School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316004, China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jinfeng Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
- School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316004, China
- Zhejiang Provincial Key Laboratory of Petrochemical Pollution Control, Zhoushan, 316004, China
| | - Haimin Sun
- Zhejiang Zhonglan Environmental Technology Co., Ltd., Wenzhou, 325000, China
| | - Yanting Liu
- Yali High School, No. 428 Laodong Western Road, Changsha, Hunan, People's Republic of China, 410007
| | - Jiexu Ye
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jian-Meng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Lichao Lu
- School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316004, China.
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310032, China.
| |
Collapse
|