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Ai S, Wang X, Zhu J, Meng X, Liu Z, Yang F, Cheng K. Microbial community assemblage altered by coprecipitation of artificial humic substances and ferrihydrite: Implications for carbon fixation pathway transformation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:174838. [PMID: 39029757 DOI: 10.1016/j.scitotenv.2024.174838] [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: 04/21/2024] [Revised: 07/10/2024] [Accepted: 07/14/2024] [Indexed: 07/21/2024]
Abstract
The suppression of soil carbon mineralization has been demonstrated to be effectively facilitated by carbon‑iron interactions, yet the specific mechanisms by which artificial humic substances (A-HS) coupled with ferrihydrite influence this process remain insufficiently explored. This study is to investigate how the A-HS, specifically artificial fulvic acid (A-FA) and artificial humic acid (A-HA), coupled with ferrihydrite, affect carbon mineralization under anaerobic system that simulates paddy flooding conditions. The object is to investigate trends in carbon emissions and to delineate microbial community structure and functional pathways. The findings indicate that A-HA and A-FA substantially reduce CO2 and CH4 emissions, with A-FA having a particularly pronounced effect on carbon fixation, halving CO2 concentrations. The low concentration of Fe(II) observed suggest that A-FA and A-HA impede the dissimilatory iron reduction (DIR) process. Detailed 16S rDNA sequencing and gene prediction analyses reveal changes in microbial community structures and functions, highlighting Methanobacterium as the dominant hydrogenotrophic methanogens. The reductive citric acid cycle, predominantly utilized by Clostridium carboxidivorans, was identified as the principal carbon fixation pathway. This work provides a novel insight into the microbial mechanisms of carbon sequestration and highlights the potential of A-HS in improving soil fertility and contributing to climate change mitigation through enhancing soil carbon storage.
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Affiliation(s)
- Shuang Ai
- College of Engineering, Northeast Agricultural University, Harbin, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Xiaobin Wang
- College of Engineering, Northeast Agricultural University, Harbin, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Jiayu Zhu
- College of Engineering, Northeast Agricultural University, Harbin, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Xianghui Meng
- College of Engineering, Northeast Agricultural University, Harbin, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Zhuqing Liu
- International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, China.
| | - Fan Yang
- International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, China.
| | - Kui Cheng
- College of Engineering, Northeast Agricultural University, Harbin, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China.
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2
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Feng L, Os Andersen T, Heldal Hagen L, Bilgic B, Jarle Horn S. Bioaugmentation by enriched hydrogenotrophic methanogens into trickle bed reactors for H 2/CO 2 conversion. BIORESOURCE TECHNOLOGY 2024; 408:131225. [PMID: 39111397 DOI: 10.1016/j.biortech.2024.131225] [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: 04/04/2024] [Revised: 08/03/2024] [Accepted: 08/04/2024] [Indexed: 08/11/2024]
Abstract
Biomethanation represents a promising approach for biomethane production, with biofilm-based processes like trickle bed reactors (TBRs) being among the most efficient solutions. However, maintaining stable performance can be challenging, and both pure and mixed culture approaches have been applied to address this. In this study, inocula enriched with hydrogenotrophic methanogens were introduced to to TBRs as bioaugmentation strategy to assess their impacts on the process performance and microbial community dynamics. Metagenomic analysis revealed a metagenome-assembled genome belonging to the hydrogenotrophic genus Methanobacterium, which became dominant during enrichment and successfully colonized the TBR biofilm after bioaugmentation. The TBRs achieved a biogas production with > 96 % methane. The bioaugmented reactor consumed additional H2. This may be due to microbial species utilizing CO2 and H2 via various CO2 reduction pathways. Overall, implementing bioaugmentation in TBRs showed potential for establishing targeted species, although challenges remain in managing H2 consumption and optimizing microbial interactions.
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Affiliation(s)
- Lu Feng
- Norwegian Institute of Bioeconomy Research (NIBIO), P.O. Box 115, 1431 Ås, Norway.
| | - Thea Os Andersen
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Live Heldal Hagen
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Begum Bilgic
- Norwegian Institute of Bioeconomy Research (NIBIO), P.O. Box 115, 1431 Ås, Norway; Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Svein Jarle Horn
- Norwegian Institute of Bioeconomy Research (NIBIO), P.O. Box 115, 1431 Ås, Norway; Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
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3
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Mahieux M, Richard C, Aemig Q, Delgenès JP, Juge M, Trably E, Escudié R. Archaeal community composition as key driver of H2 consumption rates at the start-up of the biomethanation process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172922. [PMID: 38701927 DOI: 10.1016/j.scitotenv.2024.172922] [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: 01/29/2024] [Revised: 04/03/2024] [Accepted: 04/29/2024] [Indexed: 05/05/2024]
Abstract
The performance of hydrogen consumption by various inocula derived from mesophilic anaerobic digestion plants was evaluated under ex situ biomethanation. A panel of 11 mesophilic inocula was operated at a concentration of 15 gVS.L-1 at a temperature of 35 °C in batch system with two successive injections of H2:CO2 (4:1 mol:mol). Hydrogen consumption and methane production rates were monitored from 44 h to 72 h. Hydrogen consumption kinetics varies significantly based on the inoculum origin, with no accumulation of volatile fatty acids. Microbial community analyses revealed that microbial indicators such as the increase in Methanosarcina sp. abundance and the increase of the Archaea/Bacteria ratio were associated to high initial hydrogen consumption rates. The improvement in the hydrogen consumption rate between the two injections was correlated with the enrichment in hydrogenotrophic methanogens. This work provides new insights into the early response of microbial communities to hydrogen injection and on the microbial structures that may favor their adaptation to the biomethanation process.
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Affiliation(s)
- M Mahieux
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France; ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - C Richard
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - Q Aemig
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - J-P Delgenès
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France
| | - M Juge
- ENGIE, Lab CRIGEN, 4 Rue Joséphine Baker, 93240 Stains, France
| | - E Trably
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France
| | - R Escudié
- INRAE, Univ. Montpellier, LBE, 102 Avenue des étangs, F-11100 Narbonne, France.
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Li X, Jia T, Zhu H, Cai L, Lu Y, Wang J, Tao H, Li P. Bioelectricity facilitates carbon dioxide fixation by Alcaligenes faecalis ZS-1 in a biocathodic microbial fuel cell (MFC). BIORESOURCE TECHNOLOGY 2024; 399:130555. [PMID: 38460556 DOI: 10.1016/j.biortech.2024.130555] [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: 12/03/2023] [Revised: 03/01/2024] [Accepted: 03/06/2024] [Indexed: 03/11/2024]
Abstract
The CO2 fixation mechanism by Alcaligenes faecalis ZS-1 in a biocathode microbial fuel cell (MFC) was investigated. The closed-circuit MFC (CM) exhibited a significantly higher CO2 fixation rate (10.7%) compared to the open-circuit MFC (OC) (2.0%), indicating that bioelectricity enhances CO2 capture efficiency. During the inward extracellular electron transfer (EET) process, riboflavin concentration increased in the supernatant while cytochrome levels decreased. Genome sequencing revealed diverse metabolic pathways for CO2 fixation in strain ZS-1, with potential dominance of rTCA and C4 pathways under electrotrophic conditions as evidenced by significant upregulation of the ppc gene. Differential metabolite analysis using LC-MS demonstrated that CM promoted upregulation of various lipid metabolites. These findings collectively highlight that ZS-1 simultaneously generated electricity and fixed CO2 and that the ppc associated with bioelectricity played a critical role in CO2 capture. In conclusion, bioelectricity resulted in a significant enhancement in the efficiency of CO2 fixation and lipid production.
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Affiliation(s)
- Xinyi Li
- School of Ocean Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Tianbo Jia
- School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Haiguang Zhu
- School of Ocean Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Luhan Cai
- School of Ocean Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Yubiao Lu
- School of Ocean Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Jianxin Wang
- School of Ocean Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Hengcong Tao
- School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Peng Li
- School of Ocean Science and Technology, Zhejiang Ocean University, Zhoushan 316022, PR China.
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Peng W, Lu J, Kuang J, Tang R, Guan F, Xie K, Zhou L, Yuan Y. Enhancement of hydrogenotrophic methanogenesis for methane production by nano zero-valent iron in soils. ENVIRONMENTAL RESEARCH 2024; 247:118232. [PMID: 38262517 DOI: 10.1016/j.envres.2024.118232] [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: 12/04/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/25/2024]
Abstract
Nanoscale zero-valent iron (nZVI) is attracting increasing attention as the most commonly used environmental remediation material. However, given the high surface area and strong reducing capabilities of nZVI, there is a lack of understanding regarding its effects on the complex anaerobic methane production process in flooded soils. To elucidate the mechanism of CH4 production in soil exposed to nZVI, paddy soil was collected and subjected to anaerobic culture under continuous flooding conditions, with various dosages of nZVI applied. The results showed that the introduction of nZVI into anaerobic flooded rice paddy systems promoted microbial utilization of acetate and carbon dioxide as carbon sources for methane production, ultimately leading to increased methane production. Following the introduction of nZVI into the soil, there was a rapid increase in hydrogen levels in the headspace, surpassing that of the control group. The hydrogen levels in both the experimental and control groups were depleted by the 29th day of culture. These findings suggest that nZVI exposure facilitates the enrichment of hydrogenotrophic methanogens, providing them with a favorable environment for growth. Additionally, it affected soil physicochemical properties by increasing pH and electrical conductivity. The metagenomic analysis further indicates that under exposure to nZVI, hydrogenotrophic methanogens, particularly Methanobacteriaceae and Methanocellaceae, were enriched. The relative abundance of genes such as mcrA and mcrB associated with methane production was increased. This study provides important theoretical insights into the response of key microbes, functional genes, and methane production pathways to nZVI during anaerobic methane production in rice paddy soils, offering fundamental insights into the long-term fate and risks associated with the introduction of nZVI into soils.
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Affiliation(s)
- Weijie Peng
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jinrong Lu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jiajie Kuang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Rong Tang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Fengyi Guan
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Kunting Xie
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Lihua Zhou
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China.
| | - Yong Yuan
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
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6
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Poulsen JS, Macêdo WV, Bonde T, Nielsen JL. Energetically exploiting lignocellulose-rich residues in anaerobic digestion technologies: from bioreactors to proteogenomics. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:183. [PMID: 38017526 PMCID: PMC10685487 DOI: 10.1186/s13068-023-02432-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 11/14/2023] [Indexed: 11/30/2023]
Abstract
The biogas produced through anaerobic digestion (AD) of renewable feedstocks is one of the promising alternatives to replace fossil-derived energy. Even though lignocellulosic biomass is the most abundant biomass on earth, only a small fraction is being used towards resources recovery, leaving a great potential unexploited. In this study, the combination of state-of-art genomic techniques and engineered systems were used to further advance the knowledge on biogas production from lignocellulosic-rich residues and the microbiome involved in the anaerobic digestion hereof. A long-term adapted anaerobic microbiome capable of degrading wheat straw as the sole substrate was investigated using protein stable isotope probing (protein-SIP). The results indicated that a diverse microbial community, primarily composed of Firmicutes and Methanogens, played crucial roles in cellulose degradation and methane production. Notably, Defluviitoga tunisiensis, Syntrophothermus lipocalidus, and Pelobacter carbinolicus were identified as direct metabolizers of cellulose, while Dehalobacterium assimilated labelled carbon through cross-feeding. This study provides direct evidence of primary cellulose degraders and sheds light on their genomic composition. By harnessing the potential of lignocellulosic biomass and understanding the microbial communities involved, we can promote sustainable biogas production, contributing to energy security and environmental preservation.
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Affiliation(s)
- Jan Struckmann Poulsen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220, Aalborg E, Denmark
| | - Williane Vieira Macêdo
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220, Aalborg E, Denmark
- Department of Biological and Chemical Engineering, Aarhus University, Gustav Wieds Vej, 10 D, 8000, Aarhus C, Denmark
| | - Torben Bonde
- Biofuel Technology A/S, Bredkær Parkvej 58, 8250, Egå, Denmark
| | - Jeppe Lund Nielsen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220, Aalborg E, Denmark.
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Gupta R, Sethi S, Sahu R, Bharshankh A, Biswas R. Long-term effect of seasonal and constant low temperatures on mesophilic biomass treating sewage in continuously stirred tank anaerobic granular reactor. BIORESOURCE TECHNOLOGY 2023; 386:129471. [PMID: 37453660 DOI: 10.1016/j.biortech.2023.129471] [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: 05/22/2023] [Revised: 06/27/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023]
Abstract
A Continuously Stirred Tank Anaerobic Granular Reactor seeded with mesophilic biomass was studied for 1733 days analysing the impact of seasonal (12-23 °C) and controlled (8-15 °C) low temperatures on anaerobic treatment of sewage. Aided by intermittent dosing of 0.04% (v/v) methanol, the microbiota quickly adapted to temperature fluctuations. Chemical oxygen demand (COD) removal efficiency was high but low temperatures affected methane production. Under low-temperature stress, the Methanomythylovorans and Methanosaeta-dominated methanogenic community shifted focus to cellular repair and transport, with carbon diversion towards assimilative pathways, thereby decreasing methane yields. Specific methanogenic activity at 15 °C and 30 °C increased by five and four times, respectively, from their initial values indicating microbiota retained its mesophilic properties. Despite lower methane yield, stable and high COD removals, along with low dissolved methane and volatile fatty acids indicated that low-temperature anaerobic sewage treatment using mesophilic biomass in the long run is sustainable.
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Affiliation(s)
- Rohan Gupta
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India
| | - Shradhanjali Sethi
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India
| | - Rojalin Sahu
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India
| | - Ankita Bharshankh
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India
| | - Rima Biswas
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India.
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Struckmann Poulsen J, de Jonge N, Vieira Macêdo W, Rask Dalby F, Feilberg A, Lund Nielsen J. Characterisation of cellulose-degrading organisms in an anaerobic digester. BIORESOURCE TECHNOLOGY 2022; 351:126933. [PMID: 35247567 DOI: 10.1016/j.biortech.2022.126933] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/26/2022] [Accepted: 02/27/2022] [Indexed: 06/14/2023]
Abstract
The recalcitrant nature of lignocellulosic biomass hinders efficient exploitation of this fraction for energy production. A better understanding of the microorganisms able to convert plant-based feedstocks is needed to improve anaerobic digestion of lignocellulosic biomass. In this study, active thermophilic cellulose-degrading microorganisms were identified from a full-scale anaerobic digester fed with maize by using metagenome-resolved protein stable isotope probing (protein-SIP). 13C-cellulose was converted into 13C-methane with a 13/12C isotope ratio of 0.127 after two days of incubation. Metagenomic analysis revealed 238 different genes coding for carbohydrate-active enzymes (CAZymes), six of which were directly associated with cellulose degradation. The protein-SIP analysis identified twenty heavily labelled peptides deriving from microorganisms actively assimilating labelled carbon from the degradation of 13C-cellulose, highlighting several members of the order Clostridiales. Corynebacterium was identified through CAZyme screening, amplicon analysis, and in the metagenome giving a strong identification of being a cellulose degrader.
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Affiliation(s)
- Jan Struckmann Poulsen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg E, Denmark
| | - Nadieh de Jonge
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg E, Denmark
| | - Williane Vieira Macêdo
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg E, Denmark
| | - Frederik Rask Dalby
- Department of Biological and Chemical Engineering, Aarhus University, Finlandsgade 12, 8200 Aarhus N, Denmark
| | - Anders Feilberg
- Department of Biological and Chemical Engineering, Aarhus University, Finlandsgade 12, 8200 Aarhus N, Denmark
| | - Jeppe Lund Nielsen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg E, Denmark.
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