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Xing BS, Chang XL, Zhang Y, Cao S, Tang XF, Han YC, Li YY, Wang XC, Chen R. A compound enzyme as an additive to a continuous anaerobic dynamic membrane bioreactor for enhanced lignocellulose removal from codigestion: Performance, membrane characteristics and microorganisms. BIORESOURCE TECHNOLOGY 2024; 402:130772. [PMID: 38703959 DOI: 10.1016/j.biortech.2024.130772] [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: 02/26/2024] [Revised: 04/27/2024] [Accepted: 04/29/2024] [Indexed: 05/06/2024]
Abstract
To explore the enzyme-enhanced strategy of a continuous anaerobic dynamic membrane reactor (AnDMBR), the anaerobic codigestion system of food waste and corn straw was first operated stably, and then the best combination of compound enzymes (laccase, endo-β-1,4-glucanase, xylanase) was determined via a series of batch trials. The results showed that the methane yield (186.8 ± 19.9 mL/g VS) with enzyme addition was 12.2 % higher than that without enzyme addition. Furthermore, the removal rates of cellulose, hemicellulose and lignin increased by 31 %, 36 % and 78 %, respectively. In addition, dynamic membranes can form faster and more stably with enzyme addition. The addition of enzymes changed the structure of microbial communities while maintaining sufficient hydrolysis bacteria (Bacteroidetes), promoting the proliferation of Proteobacteria as a dominant strain and bringing stronger acetylation ability. In summary, the compound enzyme strengthening strategy successfully improved the methane production, dynamic membrane effect, and degradation rate of lignocellulose in AnDMBR.
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Affiliation(s)
- Bao-Shan Xing
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 9808579, Japan.
| | - Xiang-Lin Chang
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
| | - Yi Zhang
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
| | - Sifan Cao
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
| | - Xi-Fang Tang
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
| | - Yong-Chen Han
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 9808579, Japan
| | - Xiaochang C Wang
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
| | - Rong Chen
- State International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, MOE Key Lab of Northwest Water Resource, Environment and Ecology, Shaanxi Provincial Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Provincial Key Lab of Environmental Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China
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Duan J, Kitamura K, Tsukamoto H, Van Phan H, Oba K, Hori T, Fujiwara T, Terada A. Enhanced granulation of activated sludge in an airlift reactor for organic carbon removal and ammonia retention from industrial fermentation wastewater: A comparative study. WATER RESEARCH 2024; 251:121091. [PMID: 38244299 DOI: 10.1016/j.watres.2023.121091] [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: 09/01/2023] [Revised: 12/06/2023] [Accepted: 12/28/2023] [Indexed: 01/22/2024]
Abstract
Ammonia retention and recovery from high-nitrogenous wastewater are new concepts being used for nitrogen management. A microaerophilic activated sludge system was developed to convert organic nitrogen into ammonia and retain it for its recovery; however, the settleability of activated sludge remains a challenge. Therefore, this study proposed an aerobic granular sludge system as a potential solution. Two types of sequencing batch reactors-airlift and upflow reactors-were operated to investigate the feasibility of fast granule formation, the performance of organic carbon removal and ammonia retention, and the dynamics of microbial community composition. The operation fed with industrial fermentation wastewater demonstrated that the airlift reactor ensured a more rapid granule formation than the upflow reactor because of the high shear force, and it maintained a superior ammonia retention stability of approximately 85 %. Throughout the operational period, changes in hydraulic retention time (HRT), settling time, and exchange ratio altered the granular particle sizes and microbial community compositions. Rhodocyclaceae were replaced with Comamonadaceae, Methylophilaceae, Xanthomonadaceae, and Chitinophagaceae as core taxa instrumental in granulation, likely because of their extracellular polymeric substance secretion. As the granulation process progressed, a significant decrease in the relative abundances of nitrifying bacteria-Nitrospiraceae and Nitrosomonadaceae-was observed. The reduction of settling time and HRT enhanced granulation and inhibited the activity of nitrifying bacteria. The success in granulation for ammonia conversion and retention in this study accelerates the paradigm shift from ammonia removal to ammonia recovery from industrial fermentation wastewater.
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Affiliation(s)
- Jingyu Duan
- Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo 184-8588, Japan
| | - Kotaro Kitamura
- Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo 184-8588, Japan
| | - Hiroki Tsukamoto
- Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo 184-8588, Japan
| | - Hop Van Phan
- Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo 184-8588, Japan
| | - Kohei Oba
- Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo 184-8588, Japan
| | - Tomoyuki Hori
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Taku Fujiwara
- Department of Global Ecology, Graduate School of Global Environmental Studies, Kyoto University, Kyoto 615-8540, Japan
| | - Akihiko Terada
- Department of Applied Physics and Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-Cho, Koganei, Tokyo 184-8588, Japan; Global Innovation Research Institute, Tokyo University of Agriculture and Technology, 3-8-1 Harumi-Cho, Fuchu, Tokyo 185-8538, Japan.
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