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Yue W, Genji Y, Bowen W, Yaozu M, Yang Z, Tian M, Hailian Z, Chuanwu X, Yi C, Chunyan L. Papermaking wastewater treatment coupled to 2,3-butanediol production by engineered psychrotrophic Raoultella terrigena. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131994. [PMID: 37418966 DOI: 10.1016/j.jhazmat.2023.131994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/22/2023] [Accepted: 07/03/2023] [Indexed: 07/09/2023]
Abstract
The simultaneous bioremediation and bioconversion of papermaking wastewater by psychrotrophic microorganisms holds great promise for developing sustainable environments and economies in cold regions. Here, the psychrotrophic bacterium Raoultella terrigena HC6 presented high endoglucanase (26.3 U/mL), xylosidase (732 U/mL), and laccase (8.07 U/mL) activities for lignocellulose deconstruction at 15 °C. mRNA monitoring and phenotypic variation analyses confirmed that cold-inducible cold shock protein A (CspA) facilitated the expression of the cel208, xynB68, and lac432 genes to increase the enzyme activities in strain HC6. Furthermore, the cspA gene-overexpressing mutant (strain HC6-cspA) was deployed in actual papermaking wastewater and achieved 44.3%, 34.1%, 18.4%, 80.2% and 100% removal rates for cellulose, hemicellulose, lignin, COD, and NO3--N at 15 °C. Simultaneously, 2,3-butanediol (2,3-BD) was produced from the effluent with a titer of 2.98 g/L and productivity of 0.154 g/L/h. This study reveals an association between the cold regulon and lignocellulolytic enzymes and provides a promising candidate for simultaneous papermaking wastewater treatment and 2,3-BD production.
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Affiliation(s)
- Wang Yue
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Yang Genji
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Wu Bowen
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Mi Yaozu
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Zhou Yang
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Ma Tian
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Zang Hailian
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China
| | - Xi Chuanwu
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Cheng Yi
- College of Plant Protection, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China.
| | - Li Chunyan
- College of Resources and Environment, Northeast Agricultural University, Harbin, China; Key Laboratory of Swine Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, China.
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Li J, Wang J, Zhang Q, Ding Y, Zhang Y, Wang R, Wang D, Bai S. Efficient carbon removal and excellent anti-clogging performance have been achieved in multilayer quartz sand horizontal subsurface flow constructed wetland for domestic sewage treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 335:117516. [PMID: 36840999 DOI: 10.1016/j.jenvman.2023.117516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 02/01/2023] [Accepted: 02/11/2023] [Indexed: 06/18/2023]
Abstract
The present study aimed to investigate the application of a multilayer quartz sand substrate horizontal subsurface flow constructed wetland (HSFCW) for campus sewage treatment. It aimed to assess the pollutant removal efficiency and anti-clogging performance under the suggested maximum organic loading rate (250 g/m2/d). The results of the multilayer HSFCW (CW6) were compared to the mololayer HSFCW (CW1) for the removal of the chemical oxygen demand (COD), solid accumulation, and microbial communities. During operation, the combination conditions of high hydraulic loading rate (HLR) with low COD concentration were better for COD removal under a high organic loading rate (OLR) of 200-300 g/m2/d. The maximum removal rate reached 80.4% in CW6 under high HLR, which was 13.8% higher than that in CW1, showing better adsorption and biodegradation ability of organic matter. Impressive clogging resistance capacity was found in CW6 due to the lower contents of the insoluble organic matter (IOM) that are prone to clogging, indicating full degradation of organic matters, particularly IOM, in CW6 under high HLR. Less abundance of unclassified Chitinophagaceae (under low HLR), Pedobacter and Saccharibacteria_genera_incertae_sedis (under high HLR) in CW6, which contributed to aerobic membrane fouling, helped to prevent clogging. Moreover, Brevundimonas, Cloacibacterium, Citrobacter, Luteimonas contributed to IOM degradation, thus further enhancing the anti-clogging performance. In view of the better clogging resistance performance, the application of CW6 operated under high HLR and low COD concentrations was recommended to achieve economical, efficient, and steady COD removal for domestic sewage treatment in long-term operation.
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Affiliation(s)
- Jieyue Li
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Jiajun Wang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Qin Zhang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, 541004, China
| | - Yanli Ding
- Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin, 541004, China.
| | - Yanan Zhang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Modern Industry College of Ecology and Environmental Protection, Guilin, 541004, China
| | - Ronghua Wang
- Hengsheng Water Environment Treatment Co., Ltd, Guilin 541004, China
| | - Dunqiu Wang
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, 541004, China
| | - Shaoyuan Bai
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas, Guilin, 541004, China.
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