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Xu H, Miao J, Wang J, Deng J, Zhang J, Kou Q, Xiong X, Holmes DE. Integrated CO 2 capture and conversion via H 2-driven CO 2 biomethanation: Cyclic performance and microbial community response. BIORESOURCE TECHNOLOGY 2024; 393:130055. [PMID: 37995871 DOI: 10.1016/j.biortech.2023.130055] [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: 09/24/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 11/25/2023]
Abstract
This study investigated the use of H2-driven CO2 biomethanation for integrated CO2 capture and conversion (iCCC). Anaerobic chambers containing Na2CO3-amended microbial growth medium provided with H2 were inoculated with anaerobic granular sludge. Microorganisms were enriched that could regenerate carbonate by using the bicarbonate formed from CO2 absorption to generate methane. Multiple absorption-regeneration cycles were performed and effective restoration of CO2 absorption capacity and stable carbonate recycling via CO2 biomethanation were observed for CO2 absorbents adjusted to three different pH values (9.0, 9.5, and 10.0). The pH = 10.0 group had the highest CO2 absorption capacity; 65.3 mmol/L in the 5th cycle. A slight alkaline inhibition of acetoclastic methanogenesis occurred near the end of regeneration, but had limited impact on the cyclic performance of the iCCC process. Microbial communities were dominated by H2-utilizing and alkali-tolerant species that could participate in CO2 biomethanation and survive under alternating neutral and alkaline conditions.
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Affiliation(s)
- Heng Xu
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Jiahui Miao
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Jianbing Wang
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Jiushuai Deng
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Jiayin Zhang
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Qingshuang Kou
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China
| | - Xia Xiong
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China.
| | - Dawn E Holmes
- Department of Physical and Biological Sciences, Western New England University, 1215 Wilbraham Road, Springfield, MA 01119, United States
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2
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Kita K, Unno R, Osada T, Yoshiyama H, Masaki S, Nogimura S, Matsutani M, Ishikawa M, Suzuki T. Relationship between microorganisms and volatile components in each fermentation process in the kusaya gravy that plays an important role in the manufacturing of kusaya, a traditional Japanese fermented fish product. Biosci Biotechnol Biochem 2023; 88:111-122. [PMID: 37816670 DOI: 10.1093/bbb/zbad144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/06/2023] [Indexed: 10/12/2023]
Abstract
The relationship between the microbiota and volatile components of kusaya gravy involved in the manufacturing of kusaya, a traditional Japanese fermented fish product, in the Izu Islands (Niijima and Hachijojima) and the fermentation processes are not clear. In this study, we aimed to investigate the relationship between the microbiota and volatile compounds involved in the manufacturing and management of kusaya gravy. 16S ribosomal RNA (rRNA) gene-based amplicon sequencing revealed that the microbiota in kusaya gravy was significantly different between the two islands, and the microbiota hardly changed during each fermentation process. Gas chromatography-mass spectrometry analysis also revealed that the volatile components were strongly related to the microbiota in kusaya gravy, with Hachijojima samples containing sulfur-containing compounds and Niijima samples containing short-chain fatty acids. Therefore, our findings suggest that kusaya gravy is a characteristic fermented gravy with a stable microbiota, and the fermented pickling gravy is fermented by microorganisms.
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Affiliation(s)
- Kosuke Kita
- Department of Fermentation Science and Technology, Graduate School of Applied Bioscience, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | - Ryosuke Unno
- Department of Fermentation Science and Technology, Graduate School of Applied Bioscience, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | | | | | - Sachiko Masaki
- Department of Fermentation Science and Technology, Graduate School of Applied Bioscience, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | - Sakura Nogimura
- Department of Fermentation Science and Technology, Graduate School of Applied Bioscience, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | - Minenosuke Matsutani
- NODAI Genome Research Center, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | - Morio Ishikawa
- Department of Fermentation Science and Technology, Graduate School of Applied Bioscience, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
| | - Toshihiro Suzuki
- Department of Fermentation Science and Technology, Graduate School of Applied Bioscience, Tokyo University of Agriculture, Setagaya, Tokyo, Japan
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Bitencourt JAP, Chequer LPT, Waite CC, Oliveira G, Oliveira AMS, Pereira DC, Crapez MAC. Biomass and enzymatic activities of marine bacteria in the presence of multiple metals. Braz J Microbiol 2023; 54:1523-1532. [PMID: 37212983 PMCID: PMC10485232 DOI: 10.1007/s42770-023-00993-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 04/25/2023] [Indexed: 05/23/2023] Open
Abstract
Marine environments are a repository for metals, and humans have enhanced this phenomenon over the years. Heavy metals are notoriously toxic due to their ability to biomagnify in the food chain and interact with cellular components. Nevertheless, some bacteria have physiological mechanisms that enable them to survive in impacted environments. This characteristic makes them important as biotechnological tools for environmental remediation. Thus, we isolated a bacterial consortium in Guanabara Bay (Brazil), a place with a long metal pollution history. To test the growth efficiency of this consortium in Cu-Zn-Pb-Ni-Cd medium, we measured the activity of key enzymes of microbial activity (esterases and dehydrogenase) under acidic (4.0) and neutral pH conditions, as well as the number of living cells, biopolymer production, and changes in microbial composition during metal exposure. Additionally, we calculated the predicted physiology based on microbial taxonomy. During the assay, a slight modification in bacterial composition was observed, with low abundance changes and little production of carbohydrates. Oceanobacillus chironomi, Halolactibacillus miurensis, and Alkaliphilus oremlandii were predominant in pH 7, despite O. chironomi and Tissierella creatinophila in pH 4, and T. creatinophila in Cu-Zn-Pb-Ni-Cd treatment. The metabolism represented by esterases and dehydrogenase enzymes suggested bacterial investment in esterases to capture nutrients and meet the energy demand in an environment with metal stress. Their metabolism potentially shifted to chemoheterotrophy and recycling nitrogenous compounds. Moreover, concomitantly, bacteria produced more lipids and proteins, suggesting extracellular polymeric substance production and growth in a metal-stressed environment. The isolated consortium showed promise for bioremediation of multimetal contamination and could be a valuable tool in future bioremediation programs.
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Affiliation(s)
| | - L P T Chequer
- Departamento de Biologia Marinha, Programa de Pós-Graduação Em Biologia Marinha E Ambientes Costeiros, Universidade Federal Fluminense, Niterói, RJ, CEP 24020-150, Brazil
| | - C C Waite
- Departamento de Biologia Marinha, Programa de Pós-Graduação Em Biologia Marinha E Ambientes Costeiros, Universidade Federal Fluminense, Niterói, RJ, CEP 24020-150, Brazil
| | - G Oliveira
- Departamento de Biologia Marinha, Programa de Pós-Graduação Em Biologia Marinha E Ambientes Costeiros, Universidade Federal Fluminense, Niterói, RJ, CEP 24020-150, Brazil
- School of Earth and Environmental Sciences, University of Queensland, St. Lucia, Brisbane, QLD, 4072, Australia
| | - A M S Oliveira
- Instituto Tecnológico Vale, Belém, PA, CEP 66055-090, Brazil
| | - D C Pereira
- Departamento de Biologia Marinha, Programa de Pós-Graduação Em Biologia Marinha E Ambientes Costeiros, Universidade Federal Fluminense, Niterói, RJ, CEP 24020-150, Brazil
| | - M A C Crapez
- Departamento de Biologia Marinha, Programa de Pós-Graduação Em Biologia Marinha E Ambientes Costeiros, Universidade Federal Fluminense, Niterói, RJ, CEP 24020-150, Brazil
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Chen K, Yu C, Cai L, Zhang W, Xing Y, Yang Y. Bacterial community succession in aerobic-anaerobic-coupled and aerobic composting with mown hay affected C and N losses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27572-3. [PMID: 37204571 DOI: 10.1007/s11356-023-27572-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 05/08/2023] [Indexed: 05/20/2023]
Abstract
The primary objective of this work was to investigate how the dominant microbial species change and affect C and N losses under aerobic and aerobic-anaerobic-coupled composting of mown hay (MH, ryegrass) and corn stover (CS) mix. Results showed that C and N losses in aerobic compost of MH-CS were significantly decreased by 19.57-31.47% and 29.04-41.18%, respectively. 16S rRNA gene sequencing indicated that the bacterial microbiota showed significant differences in aerobic and aerobic-anaerobic-coupled composting. LEfSe analyses showed that aerobic composting promoted the growth of bacteria related to lignocellulosic degradation and nitrogen fixation, while aerobic-anaerobic-coupled composting promoted the growth of bacteria related to denitrification. Correlation analysis between bacterial community and environmental factors indicated that moisture content (MC) was the most important environmental factor influencing the differentiation of bacterial growth. KEGG analysis showed that aerobic composting enhanced the amino acid, carbohydrate, and other advantageous metabolic functions compared to that of aerobic-anaerobic-coupled composting. As a conclusion, the addition of 10-20% corn stover (w/w) to new-mown hay (ryegrass) appeared to inhibit anaerobic composting and prompt aerobic composting in MH-CS mix, which led to the effective utilization of mown hay as a resource for composting.
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Affiliation(s)
- Kaishan Chen
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Chenxu Yu
- Department of Agriculture and Biosystem Engineering, Iowa State University, Ames, 50010, USA
| | - Liqun Cai
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Wenming Zhang
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China.
| | - Yanhong Xing
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
| | - Yingxiang Yang
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, People's Republic of China
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Zhu J, Dong G, Shih CJ, Wu YC, Lai SJ, You YT, Qiu W, Wu CH, Liao CH, Gong Y, Chen SC. Complete Genome Sequence of Tissierella sp. Strain Yu-01, Isolated from the Feces of the Black Soldier Fly. Microbiol Resour Announc 2023:e0027723. [PMID: 37154723 DOI: 10.1128/mra.00277-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
We report the complete genome sequence of Tissierella sp. strain Yu-01 (=BCRC 81391), isolated from the feces of black soldier fly (Hermetia illucens) larvae. This fly has increasingly been gaining attention because of its usefulness for recycling organic waste. The genome of strain Yu-01 was selected for further species delineation.
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Affiliation(s)
- Junyu Zhu
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, Fujian, People's Republic of China
- School of Resources and Chemical Engineering, Sanming University, Sanming City, Fujian, People's Republic of China
| | - Guowen Dong
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, Fujian, People's Republic of China
- School of Resources and Chemical Engineering, Sanming University, Sanming City, Fujian, People's Republic of China
| | - Chao-Jen Shih
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu, Taiwan, Republic of China
| | - Yen-Chi Wu
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu, Taiwan, Republic of China
| | - Shu-Jung Lai
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung City, Taiwan, Republic of China
- Research Center for Cancer Biology, China Medical University, Taichung City, Taiwan, Republic of China
| | - Yi-Ting You
- Department of Life Sciences, National Chung Hsing University, Taichung City, Taiwan, Republic of China
| | - Wanling Qiu
- School of Resources and Chemical Engineering, Sanming University, Sanming City, Fujian, People's Republic of China
| | - Chih-Hung Wu
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, Fujian, People's Republic of China
- School of Resources and Chemical Engineering, Sanming University, Sanming City, Fujian, People's Republic of China
| | - Ching-Hua Liao
- School of Resources and Chemical Engineering, Sanming University, Sanming City, Fujian, People's Republic of China
| | - Yan Gong
- People's Government of Zhongcun Township, Sanyuan District, Sanming City, Fujian, People's Republic of China
| | - Sheng-Chung Chen
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, Fujian, People's Republic of China
- School of Resources and Chemical Engineering, Sanming University, Sanming City, Fujian, People's Republic of China
- Department of Life Sciences, National Chung Hsing University, Taichung City, Taiwan, Republic of China
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6
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Chancharoenthana W, Kamolratanakul S, Visitchanakun P, Sontidejkul S, Cheibchalard T, Somboonna N, Settachaimongkon S, Leelahavanichkul A. Lacticaseibacilli attenuated fecal dysbiosis and metabolome changes in Candida-administered bilateral nephrectomy mice. Front Immunol 2023; 14:1131447. [PMID: 36969207 PMCID: PMC10034098 DOI: 10.3389/fimmu.2023.1131447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 02/27/2023] [Indexed: 03/11/2023] Open
Abstract
The impacts of metabolomic changes (reduced short-chain-fatty acids; SCFAs) in uremic condition is not fully understood. Once daily Candida gavage with or without probiotics (different times of administration) for 1 week prior to bilateral nephrectomy (Bil Nep) in 8-week-old C57BL6 mice as the possible models more resemble human conditions were performed. Candida-administered Bil Nep mice demonstrated more severe conditions than Bil Nep alone as indicated by mortality (n = 10/group) and other 48 h parameters (n = 6-8/group), including serum cytokines, leaky gut (FITC-dextran assay, endotoxemia, serum beta-glucan, and loss of Zona-occludens-1), and dysbiosis (increased Enterobacteriaceae with decreased diversity in microbiome analysis) (n = 3/group for fecal microbiome) without the difference in uremia (serum creatinine). With nuclear magnetic resonance metabolome analysis (n = 3-5/group), Bil Nep reduced fecal butyric (and propionic) acid and blood 3-hydroxy butyrate compared with sham and Candida-Bil Nep altered metabolomic patterns compared with Bil Nep alone. Then, Lacticaseibacillus rhamnosus dfa1 (SCFA-producing Lacticaseibacilli) (n = 8/group) attenuated the model severity (mortality, leaky gut, serum cytokines, and increased fecal butyrate) of Bil Nep mice (n = 6/group) (regardless of Candida). In enterocytes (Caco-2 cells), butyrate attenuated injury induced by indoxyl sulfate (a gut-derived uremic toxin) as indicated by transepithelial electrical resistance, supernatant IL-8, NFκB expression, and cell energy status (mitochondria and glycolysis activities by extracellular flux analysis). In conclusion, the reduced butyrate by uremia was not enhanced by Candida administration; however, the presence of Candida in the gut induced a leaky gut that was attenuated by SCFA-producing probiotics. Our data support the use of probiotics in uremia.
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Affiliation(s)
- Wiwat Chancharoenthana
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Tropical Immunology and Translational Research Unit (TITRU), Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- *Correspondence: Wiwat Chancharoenthana, ; Asada Leelahavanichkul,
| | - Supitcha Kamolratanakul
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Tropical Immunology and Translational Research Unit (TITRU), Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Peerapat Visitchanakun
- Center of Excellence on Translational Research in Inflammatory and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok, Thailand
| | - Supistha Sontidejkul
- Center of Excellence on Translational Research in Inflammatory and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok, Thailand
| | - Thanya Cheibchalard
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Naraporn Somboonna
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Microbiome Research Unit for Probiotics in Food and Cosmetics, Chulalongkorn University, Bangkok, Thailand
| | - Sarn Settachaimongkon
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Asada Leelahavanichkul
- Center of Excellence on Translational Research in Inflammatory and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok, Thailand
- *Correspondence: Wiwat Chancharoenthana, ; Asada Leelahavanichkul,
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7
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Hu J, Zuo Y, Guo B, Shi H. Enhanced hydrogen production from sludge anaerobic fermentation by combined freezing and calcium hypochlorite pretreatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:160134. [PMID: 36372170 DOI: 10.1016/j.scitotenv.2022.160134] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/20/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
A novel and high-efficiency sludge pretreatment method by combination of freezing and calcium hypochlorite (CH) for promoting the anaerobic fermentation performance was reported in this work. Experimental results indicated that a maximum biohydrogen production of 18.18 ± 0.43 mL/g volatile suspended solids (VSS) was realized by freezing (-5 °C) combined with CH (0.12 g/g VSS) pretreatment, which was 1.19, 4.05 and 11.36 times to that from the sole CH, sole freezing and control fermenters, respectively. Mechanism study showed that freezing + CH pretreatment efficiently disintegrated sludge flocs, producing abundant substrates for anaerobic fermentation. Model substances degradation experiment showed that the biochemical processes were all suppressed by freezing + CH method, but the suppressive degrees for hydrogen-consuming processes were greater than hydrogen-producing processes. 16S rRNA analysis revealed that the microbial community in freezing + CH treated reactor was more beneficial to hydrogen generation than that in the control, because the abundance of functional microbes was enriched from 6.81 % to 34.95 % by the co-treatment. Furthermore, sludge dewatering performance, including settleability, dewaterability and filterability, was enhanced by freezing + CH pretreatment.
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Affiliation(s)
- Jiawei Hu
- College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
| | - Yuanhui Zuo
- Research Institute of Fudan University in Ningbo, 315336, China
| | - Bing Guo
- CCCC National Engineering Research Center of Dredging Technology and Equipment Co., Ltd., Shanghai 200082, China
| | - Huancong Shi
- Huzhou Institute of Zhejiang University, Huzhou 313000, China; School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
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Description of a moderately acidotolerant and aerotolerant anaerobic bacterium Acidilutibacter cellobiosedens gen. nov., sp. nov. within the family Acidilutibacteraceae fam. nov., and proposal of Sporanaerobacteraceae fam. nov. and Tepidimicrobiaceae fam. nov. Syst Appl Microbiol 2023; 46:126376. [PMID: 36375421 DOI: 10.1016/j.syapm.2022.126376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/17/2022] [Accepted: 10/26/2022] [Indexed: 11/09/2022]
Abstract
A Gram-stain positive, moderately thermophilic, acidotolerant and aerotolerant anaerobic bacterium, designated JN-28 T, was isolated from the pit mud of Chinese strong-flavor liquor. Growth was observed at 25-50 °C and pH 5.5-8.0 in the presence of 0-25 g l-1 NaCl (optimally at 45 °C, pH 6.0, without NaCl). Strain JN-28 T was heterotrophic, requiring yeast extract for growth. The major cellular fatty acids were iso-C15:0 and C14:0. The DNA G + C content of genomic DNA was 33.54 mol%. The strain was resistant to vancomycin (10 mg l-1). Genome analysis revealed the presence of genes involved in the response to mild acid stress and oxidative stress, and resistance to vancomycin. 16S rRNA gene-based phylogenetic analysis showed that strain JN-28 T shares ≤ 89.3 % sequence similarity with its closest relatives Sporanaerobacter acetigenes DSM 13106 T and other members in the order Tissierellales. Based on phenotypic and phylogenetic characteristics, Acidilutibacter cellobiosedens gen. nov., sp. nov. is proposed for the new genus and novel species with the type strain JN-28 T (=CCAM 418 T = JCM 39087 T). Further phylogenetic and phylogenomic analyses suggested strain JN-28 T represents a novel family within the order Tissierellales, for which Acidilutibacteraceae fam. nov. is proposed. In addition, the family Tissierellaceae was reclassified, Sporanaerobacteraceae fam. nov. and Tepidimicrobiaceae fam. nov. were formally proposed. Emended description of the family Tissierellaceae is also provided.
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Liu MK, Liu CY, Tian XH, Feng J, Guo XJ, Liu Y, Zhang XY, Tang YM. Bioremediation of degraded pit mud by indigenous microbes for Baijiu production. Food Microbiol 2022; 108:104096. [DOI: 10.1016/j.fm.2022.104096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/20/2022] [Accepted: 07/16/2022] [Indexed: 11/26/2022]
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Hinkel LA, Willsey GG, Lenahan SM, Eckstrom K, Schutz KC, Wargo MJ. Creatine utilization as a sole nitrogen source in Pseudomonas putida KT2440 is transcriptionally regulated by CahR. MICROBIOLOGY (READING, ENGLAND) 2022; 168. [PMID: 35266867 DOI: 10.1099/mic.0.001145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Glutamine amidotransferase-1 domain-containing AraC-family transcriptional regulators (GATRs) are present in the genomes of many bacteria, including all Pseudomonas species. The involvement of several characterized GATRs in amine-containing compound metabolism has been determined, but the full scope of GATR ligands and regulatory networks are still unknown. Here, we characterize Pseudomonas putida's detection of the animal-derived amine compound creatine, a compound particularly enriched in muscle and ciliated cells by a creatine-specific GATR, PP_3665, here named CahR (Creatine amidohydrolase Regulator). cahR is necessary for transcription of the gene encoding creatinase (PP_3667/creA) in the presence of creatine and is critical for P. putida's ability to utilize creatine as a sole source of nitrogen. The CahR/creatine regulon is small, and an electrophoretic mobility shift assay demonstrates strong and specific CahR binding only at the creA promoter, supporting the conclusion that much of the regulon is dependent on downstream metabolites. Phylogenetic analysis of creA orthologues associated with cahR orthologues highlights a strain distribution and organization supporting probable horizontal gene transfer, particularly evident within the genus Acinetobacter. This study identifies and characterizes the GATR that transcriptionally controls P. putida's metabolism of creatine, broadening the scope of known GATR ligands and suggesting GATR diversification during evolution of metabolism for aliphatic nitrogen compounds.
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Affiliation(s)
- Lauren A Hinkel
- Department of Microbiology and Molecular Genetics, University of Vermont Larner College of Medicine, Burlington, VT 05405, USA
- Cellular, Molecular and Biomedical Sciences Graduate Program, University of Vermont, Burlington, VT 05405, USA
- Present address: Department of Biology, Rutgers Camden, Camden, NJ 08182, USA
| | - Graham G Willsey
- Department of Microbiology and Molecular Genetics, University of Vermont Larner College of Medicine, Burlington, VT 05405, USA
- Cellular, Molecular and Biomedical Sciences Graduate Program, University of Vermont, Burlington, VT 05405, USA
- Present address: Division of Infectious Diseases, Department of Health, Wadsworth Center, New York State, Albany, NY 12208, USA
| | - Sean M Lenahan
- Cellular, Molecular and Biomedical Sciences Graduate Program, University of Vermont, Burlington, VT 05405, USA
| | - Korin Eckstrom
- Department of Microbiology and Molecular Genetics, University of Vermont Larner College of Medicine, Burlington, VT 05405, USA
| | - Kristin C Schutz
- Department of Microbiology and Molecular Genetics, University of Vermont Larner College of Medicine, Burlington, VT 05405, USA
| | - Matthew J Wargo
- Department of Microbiology and Molecular Genetics, University of Vermont Larner College of Medicine, Burlington, VT 05405, USA
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Coşgun S, Kara B, Kunt B, Hür C, Semerci N. Biological recovery of phosphorus from waste activated sludge via alkaline fermentation and struvite biomineralization by Brevibacterium antiquum. Biodegradation 2022; 33:195-206. [PMID: 35142960 DOI: 10.1007/s10532-022-09975-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 02/01/2022] [Indexed: 11/27/2022]
Abstract
Struvite biomineralization is a promising method for phosphorus recovery from wastewater treatment plant streams, and the growth of responsible microorganisms in mixed cultures is one of the most critical points for applying this process in pilot and full-scale. This study aimed to investigate the growth and bio-struvite production of Brevibacterium antiquum in mixed sludge culture. Alkaline fermentation was applied at different pH conditions to enhance the phosphorus content of sludge for an efficient recovery, and pH 8 was determined as the most feasible considering the phosphorus release and sludge characteristics. Growth optimization studies showed that NaCl's presence decreases the growth rate of Brevibacterium antiquum and bio-struvite production. At the same time, pH in the range of 6.8-8.2 did not alter the growth significantly. In addition, studies showed the ability of Brevibacterium antiquum in unsterilized fermented sludge centrate to grow and recover the phosphorus as struvite. Thus, our results indicated the potential of struvite biomineralization in full-scale wastewater treatment plants.
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Affiliation(s)
- Sevil Coşgun
- Environmental Engineering Department, Institute of Pure and Applied Sciences, Marmara University, Kuyubaşı, Istanbul, Turkey.
- Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland.
| | - Büşra Kara
- Environmental Engineering Department, Institute of Pure and Applied Sciences, Marmara University, Kuyubaşı, Istanbul, Turkey
| | - Büşra Kunt
- Environmental Engineering Department, Institute of Pure and Applied Sciences, Marmara University, Kuyubaşı, Istanbul, Turkey
| | - Ceren Hür
- Environmental Engineering Department, Institute of Pure and Applied Sciences, Marmara University, Kuyubaşı, Istanbul, Turkey
| | - Neslihan Semerci
- Environmental Engineering Department, Faculty of Engineering, Marmara University, Kuyubaşı, Istanbul, Turkey
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12
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Meng X, Cao Q, Sun Y, Huang S, Liu X, Li D. 16S rRNA genes- and metagenome-based confirmation of syntrophic butyrate-oxidizing methanogenesis enriched in high butyrate loading. BIORESOURCE TECHNOLOGY 2022; 345:126483. [PMID: 34864185 DOI: 10.1016/j.biortech.2021.126483] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 06/13/2023]
Abstract
The understanding and enrichment of consortia formed by syntrophic butyrate-oxidizing bacteria and methanogens in the complex environment are crucial for effectively degrading butyrate and preventing acid inhibition. In this study, the better butyrate-tolerated and highly efficient microbial consortia were domesticated and enriched through adding butyric acid ranging from 0.2 to 4.4 g/(L·d). The volumetric biogas production continuously increased to 1.65 L/(L·d). Microbial community diversity showed that a dramatic shift of bacterial structure occurred at BAL of 1.6 g/(L·d) and the structure presented better stability at high BAL. The syntrophic consortia and the main metabolic pathways were revealed through combination of the 16S rDNA and metagenome sequencing analyses. Syntrophomonas was the major butyrate-oxidizing bacterium and oxidized butyrate mainly through β-oxidaiton. Synergistaceae and Mesotoga acted as the main acetate-oxidizing bacteria. IHT and methanogenesis pathways were strongly enhanced by DMER64 and Methanosarcina as the main H2 carrier and dominant methanogen, respectively.
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Affiliation(s)
- Xianghui Meng
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; College of Engineering, Northeast Agriculture University, Harbin 150030, PR China
| | - Qin Cao
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Yong Sun
- College of Engineering, Northeast Agriculture University, Harbin 150030, PR China
| | - Siyuan Huang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Xiaofeng Liu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Dong Li
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
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13
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Enhancement of co-conversion of endogenous carbon and nitrogen of dairy wastewater in mesophilic hydrolysis-acidification coupled microalgae culture system by rhamnolipid. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2021.108314] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Ban Q, Zhang L, Li J. Correlating bacterial and archaeal community with efficiency of a coking wastewater treatment plant employing anaerobic-anoxic-oxic process in coal industry. CHEMOSPHERE 2022; 286:131724. [PMID: 34388873 DOI: 10.1016/j.chemosphere.2021.131724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 07/24/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Coking wastewater (CWW) contains various complex pollutants, and biological treatment processes are frequently applied in the coking wastewater treatment plants (CWWTPs). The present work is to evaluate the contaminants removal of a full-scale CWWTP with an anaerobic-anoxic-oxic process (A/A/O), to reveal function of bacterial and archaeal community involved in different bioreactors, and to clarify the relationship between the performance and microbial community. Illumina Miseq sequencing of bacteria showed that β-proteobacteria dominated in three bioreactors with relative abundance of 60.2%~81.7%. 75.2% of sequences were assigned to Petrobacter in the bioreactor A1, while Thiobacillus dominated in A2 and O with relative abundance of 31.8% and 38.7%, respectively. Illumina Miseq sequencing of archaea revealed a high diversity of methanogens existed in A1 and A2 activated sludge. Moreover, Halostagnicola was the dominant archaea in A1 and A2 activated sludge with relative abundance of 41.8% and 66.5%, respectively. Function predicted analysis explored that function of bacteria was similar to that of archaea but the relative abundance differed from each other. A putative biodegradation model of CWW treatment in A/A/O process indicated that A1 and A2 activated sludge mainly reduced carbohydrate, protein, TN, phenol and cyanide, as well as methane production. Bacteria in the bioreactor O were responsible for aerobic biotransformation of residual carbohydrates, refractory organics and nitrification. The redundancy analysis (RDA) further revealed that removal of COD, TN, and NO3--N, phenol and cyanides were highly correlated with some anaerobic bacteria and archaea, whereas the transformation of NH4+-N was positively correlated with some aerobic bacteria.
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Affiliation(s)
- Qiaoying Ban
- College of Environmental and Resource Sciences, Shanxi University, Taiyuan, 030006, PR China; Shanxi Laboratory for Yellow River, Taiyuan, 030006, China
| | - Liguo Zhang
- College of Environmental and Resource Sciences, Shanxi University, Taiyuan, 030006, PR China; Shanxi Laboratory for Yellow River, Taiyuan, 030006, China
| | - Jianzheng Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, PR China.
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15
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Christakis CA, Barkay T, Boyd ES. Expanded Diversity and Phylogeny of mer Genes Broadens Mercury Resistance Paradigms and Reveals an Origin for MerA Among Thermophilic Archaea. Front Microbiol 2021; 12:682605. [PMID: 34248899 PMCID: PMC8261052 DOI: 10.3389/fmicb.2021.682605] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/28/2021] [Indexed: 11/13/2022] Open
Abstract
Mercury (Hg) is a highly toxic element due to its high affinity for protein sulfhydryl groups, which upon binding, can destabilize protein structure and decrease enzyme activity. Prokaryotes have evolved enzymatic mechanisms to detoxify inorganic Hg and organic Hg (e.g., MeHg) through the activities of mercuric reductase (MerA) and organomercury lyase (MerB), respectively. Here, the taxonomic distribution and evolution of MerAB was examined in 84,032 archaeal and bacterial genomes, metagenome assembled genomes, and single-cell genomes. Homologs of MerA and MerB were identified in 7.8 and 2.1% percent of genomes, respectively. MerA was identified in the genomes of 10 archaeal and 28 bacterial phyla previously unknown to code for this functionality. Likewise, MerB was identified in 2 archaeal and 11 bacterial phyla previously unknown to encode this functionality. Surprisingly, homologs of MerB were identified in a number of genomes (∼50% of all MerB-encoding genomes) that did not encode MerA, suggesting alternative mechanisms to detoxify Hg(II) once it is generated in the cytoplasm. Phylogenetic reconstruction of MerA place its origin in thermophilic Thermoprotei (Crenarchaeota), consistent with high levels of Hg(II) in geothermal environments, the natural habitat of this archaeal class. MerB appears to have been recruited to the mer operon relatively recently and likely among a mesophilic ancestor of Euryarchaeota and Thaumarchaeota. This is consistent with the functional dependence of MerB on MerA and the widespread distribution of mesophilic microorganisms that methylate Hg(II) at lower temperature. Collectively, these results expand the taxonomic and ecological distribution of mer-encoded functionalities, and suggest that selection for Hg(II) and MeHg detoxification is dependent not only on the availability and type of mercury compounds in the environment but also the physiological potential of the microbes who inhabit these environments. The expanded diversity and environmental distribution of MerAB identify new targets to prioritize for future research.
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Affiliation(s)
- Christos A. Christakis
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Tamar Barkay
- Department of Biochemistry and Microbiology, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
| | - Eric S. Boyd
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
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16
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Salar-Garcia MJ, Obata O, Kurt H, Chandran K, Greenman J, Ieropoulos IA. Impact of Inoculum Type on the Microbial Community and Power Performance of Urine-Fed Microbial Fuel Cells. Microorganisms 2020; 8:microorganisms8121921. [PMID: 33287204 PMCID: PMC7761717 DOI: 10.3390/microorganisms8121921] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 01/08/2023] Open
Abstract
Bacteria are the driving force of the microbial fuel cell (MFC) technology, which benefits from their natural ability to degrade organic matter and generate electricity. The development of an efficient anodic biofilm has a significant impact on the power performance of this technology so it is essential to understand the effects of the inoculum nature on the anodic bacterial diversity and establish its relationship with the power performance of the system. Thus, this work aims at analysing the impact of 3 different types of inoculum: (i) stored urine, (ii) sludge and (iii) effluent from a working MFC, on the microbial community of the anodic biofilm and therefore on the power performance of urine-fed ceramic MFCs. The results showed that MFCs inoculated with sludge outperformed the rest and reached a maximum power output of 40.38 mW·m-2anode (1.21 mW). The power performance of these systems increased over time whereas the power output by MFCs inoculated either with stored urine or effluent decreased after day 30. These results are directly related to the establishment and adaptation of the microbial community on the anode during the assay. Results showed the direct relationship between the bacterial community composition, originating from the different inocula, and power generation within the MFCs.
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Affiliation(s)
- Maria Jose Salar-Garcia
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, Bristol BS16 1QY, UK; (O.O.); (J.G.)
- Correspondence: (M.J.S.-G.); (I.A.I.)
| | - Oluwatosin Obata
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, Bristol BS16 1QY, UK; (O.O.); (J.G.)
| | - Halil Kurt
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA; (H.K.); (K.C.)
| | - Kartik Chandran
- Department of Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA; (H.K.); (K.C.)
| | - John Greenman
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, Bristol BS16 1QY, UK; (O.O.); (J.G.)
| | - Ioannis A. Ieropoulos
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, Bristol BS16 1QY, UK; (O.O.); (J.G.)
- Correspondence: (M.J.S.-G.); (I.A.I.)
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17
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De Paepe J, De Paepe K, Gòdia F, Rabaey K, Vlaeminck SE, Clauwaert P. Bio-electrochemical COD removal for energy-efficient, maximum and robust nitrogen recovery from urine through membrane aerated nitrification. WATER RESEARCH 2020; 185:116223. [PMID: 32739699 DOI: 10.1016/j.watres.2020.116223] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/17/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
Resource recovery from source-separated urine can shorten nutrient cycles on Earth and is essential in regenerative life support systems for deep-space exploration. In this study, a robust two-stage, energy-efficient, gravity-independent urine treatment system was developed to transform fresh real human urine into a stable nutrient solution. In the first stage, up to 85% of the COD was removed in a microbial electrolysis cell (MEC), converting part of the energy in organic compounds (27-46%) into hydrogen gas and enabling full nitrogen recovery by preventing nitrogen losses through denitrification in the second stage. Besides COD removal, all urea was hydrolysed in the MEC, resulting in a stream rich in ammoniacal nitrogen and alkalinity, and low in COD. This stream was fed into a membrane-aerated biofilm reactor (MABR) in order to convert the volatile and toxic ammoniacal nitrogen to non-volatile nitrate by nitrification. Bio-electrochemical pre-treatment allowed to recover all nitrogen as nitrate in the MABR at a bulk-phase dissolved oxygen level below 0.1 mg O2 L-1. In contrast, feeding the MABR directly with raw urine (omitting the first stage), at the same nitrogen loading rate, resulted in nitrogen loss (18%) due to denitrification. The MEC and MABR were characterised by very distinct and diverse microbial communities. While (strictly) anaerobic genera, such as Geobacter (electroactive bacteria), Thiopseudomonas, a Lentimicrobiaceae member, Alcaligenes and Proteiniphilum prevailed in the MEC, the MABR was dominated by aerobic genera, including Nitrosomonas (a known ammonium oxidiser), Moheibacter and Gordonia. The two-stage approach yielded a stable nitrate-rich, COD-low nutrient solution, suitable for plant and microalgae cultivation.
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Affiliation(s)
- Jolien De Paepe
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium; Departament d'Enginyeria Química, Biològica I Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra 08193 Barcelona, Spain; Center for Advanced Process Technology and Urban Resource Efficiency (CAPTURE), Belgium
| | - Kim De Paepe
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium
| | - Francesc Gòdia
- Departament d'Enginyeria Química, Biològica I Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra 08193 Barcelona, Spain
| | - Korneel Rabaey
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium; Center for Advanced Process Technology and Urban Resource Efficiency (CAPTURE), Belgium.
| | - Siegfried E Vlaeminck
- Center for Advanced Process Technology and Urban Resource Efficiency (CAPTURE), Belgium; Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Peter Clauwaert
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium; Center for Advanced Process Technology and Urban Resource Efficiency (CAPTURE), Belgium
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18
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Cheng J, Dong H, Zhang H, Yuan L, Li H, Yue L, Hua J, Zhou J. Improving CH 4 production and energy conversion from CO 2 and H 2 feedstock gases with mixed methanogenic community over Fe nanoparticles. BIORESOURCE TECHNOLOGY 2020; 314:123799. [PMID: 32673781 DOI: 10.1016/j.biortech.2020.123799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/01/2020] [Accepted: 07/04/2020] [Indexed: 06/11/2023]
Abstract
To achieve methanogenic community optimization and improve the conversion efficiency of CO2 to CH4, Fe nanoparticles were used to promote the Methanothermobacter abundance in methanogens, which significantly increased the conversion efficiency of CO2 and H2 feedstock gases to CH4 product. High-throughput 16S rRNA gene sequencing analysis revealed that Methanothermobacter abundance markedly increased from 7 to 16% when the Fe nanoparticles concentration increased from 0 to 1.5 g/LR (the working volume in the bioreactor). Therefore, the CH4 yield significantly promoted from 0.105 to 0.186 L/LR. However, when the Fe nanoparticles concentration was further increased to 2 g/LR, methanogenesis was inhibited due to toxic effects. The electron transfer constant kapp of anaerobic sludge increased by 32.8-fold to 5.77 × 10-2 s-1 when the Fe nanoparticles concentration increased from 0 to 1.5 g/LR, which significantly promoted carbon conversion efficiency from 52.9 to 92.9% and energy conversion efficiency from 46.3 to 76.9%.
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Affiliation(s)
- Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Haiquan Dong
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Haihua Zhang
- Hangzhou Environmental Group Company Limited, Hangzhou 310022, China
| | - Luyun Yuan
- Hangzhou Environmental Group Company Limited, Hangzhou 310022, China
| | - Hui Li
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Liangchen Yue
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Junjie Hua
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Junhu Zhou
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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19
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Prudente M, Massazza DA, Busalmen JP, Romeo HE. Urine dilution with a synthetic wastewater (Syntho) boosts the electricity production in a bio-electrochemical system powered by un-pretreated human urine. Bioelectrochemistry 2020; 137:107639. [PMID: 32942188 DOI: 10.1016/j.bioelechem.2020.107639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 11/29/2022]
Abstract
Human urine can be turned into electricity in bio-electrochemical systems. The acclimation of electro-active bacteria to culture media with increasing urine concentrations has led to raising the obtained current densities, which typically followed a Monod-like evolution profile as a function of urine concentration. However, the acclimation protocol has been so far evaluated using pretreated urine samples (fermented or precipitated), not raw (un-pretreated) urine. We demonstrate that, when un-pretreated urine is used, the microbial adaptation to increasingly concentrated urine leads to a current density profile that does not reach a saturation-like phase, but follows a Han/Levenspiel-type trend (bell-shaped). By diluting un-pretreated urine with a synthetic domestic wastewater (Syntho) up to concentrations matching those of the maximum in the Han/Levenspiel-like current profile (15-20% v/v) it is possible to avoid the drop in the electro-active response, generating anodic current densities as high as 3.6 ± 0.2 A.m-2 (per actual surface area), 35-fold higher than those reached in pure un-pretreated urine.
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Affiliation(s)
- Mariano Prudente
- División Polímeros Nanoestructurados, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 7600 Mar del Plata, Argentina
| | - Diego A Massazza
- División Ingeniería de Interfases y Bio-procesos, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 7600 Mar del Plata, Argentina
| | - Juan P Busalmen
- División Ingeniería de Interfases y Bio-procesos, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 7600 Mar del Plata, Argentina
| | - Hernán E Romeo
- División Polímeros Nanoestructurados, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 7600 Mar del Plata, Argentina.
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20
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Del Val C, Bondar AN. Diversity and sequence motifs of the bacterial SecA protein motor. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183319. [PMID: 32335021 DOI: 10.1016/j.bbamem.2020.183319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/17/2020] [Accepted: 04/19/2020] [Indexed: 12/24/2022]
Abstract
SecA is an essential component of the Sec protein secretion pathway in bacteria. Secretory proteins targeted to the Sec pathway by their N-terminal signal peptide bind to SecA, which couples binding and hydrolysis of adenosine triphosphate with movement of the secretory protein across the membrane-embedded SecYEG protein translocon. The phylogenetic diversity of bacteria raises the important question as to whether the region of SecA where the pre-protein binds has conserved sequence features that might impact the reaction mechanism of SecA. To address this question we established a large data set of SecA protein sequences and implemented a protocol to cluster and analyze these sequences according to features of two of the SecA functional domains, the protein binding domain and the nucleotide-binding domain 1. We identify remarkable sequence diversity of the protein binding domain, but also conserved motifs with potential role in protein binding. The N-terminus of SecA has sequence motifs that could help anchor SecA to the membrane. The overall sequence length and net estimated charge of SecA sequences depend on the organism.
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Affiliation(s)
- Coral Del Val
- University of Granada, Departmrent of Computer Science and Artificial Intelligence, E-18071 Granada, Spain; University of Granada, Andalusian Research Institute in Data Science and Computational Intelligence, E-18071 Granada, Spain.
| | - Ana-Nicoleta Bondar
- Freie Universität Berlin, Department of Physics, Theoretical Molecular Biophysics, D-14195 Berlin, Germany.
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21
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Obata O, Greenman J, Kurt H, Chandran K, Ieropoulos I. Resilience and limitations of MFC anodic community when exposed to antibacterial agents. Bioelectrochemistry 2020; 134:107500. [PMID: 32299023 PMCID: PMC7262590 DOI: 10.1016/j.bioelechem.2020.107500] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 12/20/2022]
Abstract
MFC cascade can withstand and degrade high concentrations of ampicillin. Chloroxylenol caused loss of power and microbial community within MFC cascade. MFC anodic biofilm responds differentially to different inhibitory chemical agents. MFC cascade has the potential for bioremediation of certain chemical agents.
This study evaluates the fate of certain bactericidal agents introduced into microbial fuel cell (MFC) cascades and the response of the microbial community. We tested the response of functioning urine fed MFC cascades using two very different bactericidal agents: a common antibiotic (Ampicillin, 5 g/L) and a disinfectant (Chloroxylenol 4.8 g/L) in concentrations of up to 100 times higher than the usual dose. Results of power generation showed that the established bacteria community was able to withstand high concentrations of ampicillin with good recovery after 24 h of minor decline. However, power generation was adversely affected by the introduction of chloroxylenol, resulting in a 99% loss of power generation. Ampicillin was completely degraded within the MFC cascade (>99.99%), while chloroxylenol remained largely unaffected. Analysis of the microbial community before the addition of the bactericidal agents showed a significant bacterial diversity with at least 35 genera detected within the cascade. Microbial community analysis after ampicillin treatment showed the loss of a small number of bacterial communities and proportional fluctuations of specific strains within the individual MFCs community. On the other hand, there was a significant shift in the bacterial community after chloroxylenol treatment coupled with the loss of at least 13 bacterial genera across the cascade.
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Affiliation(s)
- Oluwatosin Obata
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, BS16 1QY, UK.
| | - John Greenman
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, BS16 1QY, UK; Biological, Biomedical and Analytical Sciences, University of the West of England, BS16 1QY, UK
| | - Halil Kurt
- Department of Earth and Environmental Engineering, Columbia University, New York, United States
| | - Kartik Chandran
- Department of Earth and Environmental Engineering, Columbia University, New York, United States
| | - Ioannis Ieropoulos
- Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, BS16 1QY, UK.
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22
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Setiawan R, Sumerta IN, Anita S, Narakusumo RP, Setiawan Achmadi A. Comparison of gut microbiome from Sulawesi carrion and burying beetles (Coleoptera: Silphidae) through metagenomic analysis of 16S rRNA gene. BIO WEB OF CONFERENCES 2020. [DOI: 10.1051/bioconf/20201900015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Carrion beetle (Coleoptera: Silphidae) is one of the scavengers which obtain nutrition from carcass decomposition which supported by the microbial symbionts through the mutual symbiosis. In this study, we characterized and compared the gut microbial community from the species of Nicrophorinae (Nicrophorus distinctus Grouvelle, 1885) and Silphinae (Necrophila renatae Portevin, 1920) from Dako Mountain, Central Sulawesi using 16S metagenomic approach. A total of 661 bacterial Operational Taxonomic Units (OTUs) at the species level were obtained from the guts of Ni. distinctus and Ne. renatae. Those numbers were predominated by Firmicutes and Proteobacteria, followed by Bacteriodetes in both species. Interestingly, a high number of Lactobacillales was observed in Ni. distinctus and lower number in Clostridiales and Cardiobacteriales compared to Ne. renatae, which showed higher abundance of those classes. Both of these insect species have nearly the same microbial diversity values, even though there some lower taxa levels were found different abundance. These results suggest that the patterns of the gut microbial structure depicted their roles in certain behavior and habitat on decomposing carcasses and could be correlated to the specific level of taxa roles in nutrient processing.
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23
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Takakura T, Francis R, Anani H, Bilen M, Raoult D, Bou Khalil J. Anaerosphaera massiliensis sp. nov., a new bacterium isolated from the stool of a 39-year-old Pygmy. New Microbes New Infect 2020; 33:100633. [PMID: 32021694 PMCID: PMC6994800 DOI: 10.1016/j.nmni.2019.100633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 11/25/2019] [Accepted: 12/04/2019] [Indexed: 12/22/2022] Open
Abstract
Anaerosphaera massiliensis strain Marseille-P4592T (= CSURP4592T; = CCUG72452T) is a new species isolated from the stool of a 39-year-old male Pygmy from the Democratic Republic of Congo.
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Affiliation(s)
- T. Takakura
- Hitachi High-Technologies Corporation, Analytical & Medical Solution Business Group, Ibaraki-ken, Japan
| | - R. Francis
- Institut Hospitalo-Universitaire Méditerranée-Infection, Marseille, France
- Aix-Marseille Université, Institut de Recherche pour le Developpement, UMR Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
| | - H. Anani
- Institut Hospitalo-Universitaire Méditerranée-Infection, Marseille, France
- Aix Marseille Université, Institut de Recherche pour le Développement, Service de Santé des Armées, AP-HM, UMR Vecteurs Infections Tropicales et Méditeranéennes (VITROME), Marseille, France
| | - M. Bilen
- Institut Hospitalo-Universitaire Méditerranée-Infection, Marseille, France
| | - D. Raoult
- Institut Hospitalo-Universitaire Méditerranée-Infection, Marseille, France
- Aix-Marseille Université, Institut de Recherche pour le Developpement, UMR Microbes Evolution Phylogeny and Infections (MEPHI), Marseille, France
| | - J.Y. Bou Khalil
- Institut Hospitalo-Universitaire Méditerranée-Infection, Marseille, France
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24
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Zhao CC, Kim DW, Eun JB. Physicochemical properties and bacterial community dynamics of hongeo, a Korean traditional fermented skate product, during fermentation at 10 °C. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.01.048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Unveiling hákarl: A study of the microbiota of the traditional Icelandic fermented fish. Food Microbiol 2019; 82:560-572. [PMID: 31027819 DOI: 10.1016/j.fm.2019.03.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 01/10/2023]
Abstract
Hákarl is produced by curing of the Greenland shark (Somniosus microcephalus) flesh, which before fermentation is toxic due to the high content of trimethylamine (TMA) or trimethylamine N-oxide (TMAO). Despite its long history of consumption, little knowledge is available on the microbial consortia involved in the fermentation of this fish. In the present study, a polyphasic approach based on both culturing and DNA-based techniques was adopted to gain insight into the microbial species present in ready-to-eat hákarl. To this aim, samples of ready-to-eat hákarl were subjected to viable counting on different selective growth media. The DNA directly extracted from the samples was further subjected to Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) and 16S amplicon-based sequencing. Moreover, the presence of Shiga toxin-producing Escherichia coli (STEC) and Pseudomonas aeruginosa was assessed via qualitative real-time PCR assays. pH values measured in the analyzed samples ranged from between 8.07 ± 0.06 and 8.76 ± 0.00. Viable counts revealed the presence of total mesophilic aerobes, lactic acid bacteria and Pseudomonadaceae. Regarding bacteria, PCR-DGGE analysis highlighted the dominance of close relatives of Tissierella creatinophila. For amplicon sequencing, the main operational taxonomic units (OTUs) shared among the data set were Tissierella, Pseudomonas, Oceanobacillus, Abyssivirga and Lactococcus. The presence of Pseudomonas in the analyzed samples supports the hypothesis of a possible role of this microorganism on the detoxification of shark meat from TMAO or TMA during fermentation. Several minor OTUs (<1%) were also detected, including Alkalibacterium, Staphylococcus, Proteiniclasticum, Acinetobacter, Erysipelothrix, Anaerobacillus, Ochrobactrum, Listeria and Photobacterium. Analysis of the yeast and filamentous fungi community composition by PCR-DGGE revealed the presence of close relatives of Candida tropicalis, Candida glabrata, Candida parapsilosis, Candida zeylanoides, Saccharomyces cerevisiae, Debaryomyces, Torulaspora, Yamadazyma, Sporobolomyces, Alternaria, Cladosporium tenuissimum, Moristroma quercinum and Phoma/Epicoccum, and some of these species probably play key roles in the development of the sensory qualities of the end product. Finally, qualitative real-time PCR assays revealed the absence of STEC and Pseudomonas aeruginosa in all of the analyzed samples.
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Chen S, Dong B, Dai X, Wang H, Li N, Yang D. Effects of thermal hydrolysis on the metabolism of amino acids in sewage sludge in anaerobic digestion. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 88:309-318. [PMID: 31079644 DOI: 10.1016/j.wasman.2019.03.060] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 02/21/2019] [Accepted: 03/26/2019] [Indexed: 05/23/2023]
Abstract
Three semi-continuous anaerobic digesters with raw sludge (R1) or thermally hydrolyzed sludge (120 °C (R2) or 160 °C (R3)) were operated to investigate the effects of thermal hydrolysis on the metabolism of amino acids during high solid anaerobic digestion with sewage sludge. Thermal hydrolysis pretreatment (THP) decomposed protein in terms of hydrolytic amino acid in raw sludge by 8.90% and 26.69% under 120 °C and 160 °C, respectively. The decomposition of amino acids during THP was the main contributor to the final enhanced amino acids degradation in sewage sludge with THP after anaerobic digestion. The dominating bacterial genera related to amino acids degradation in R2 and R3 shifted to Fastidiosipila and Proteiniphilum/Tissierella, respectively, from Gelria in R1, influencing the utilization of amino acids, especially glutamic acid, glycine and proline. Different from 120 °C, THP at 160 °C played an important role in promoting amino acid metabolism during AD through the Stickland pathway by the bacteria belonged to order Clostridiales.
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Affiliation(s)
- Sisi Chen
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Bin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Hongyang Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Ning Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
| | - Dianhai Yang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
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Blázquez E, Baeza JA, Gabriel D, Guisasola A. Treatment of real flue gas desulfurization wastewater in an autotrophic biocathode in view of elemental sulfur recovery: Microbial communities involved. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 657:945-952. [PMID: 30677960 DOI: 10.1016/j.scitotenv.2018.12.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 12/03/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
Sulfur oxide emissions can lead to acidic precipitation and health concerns. Flue gas desulfurization (FGD) systems treat these emissions generating a wastewater with high-sulfate content. This work is the first attempt to treat this effluent with bioelectrochemical systems (BES) in order to recover elemental sulfur, a technology that allows the treatment of several wastewaters that lack of electron donor. The sulfate treatment and elemental sulfur recovery have been studied in a biocathode with simultaneous sulfate reduction to sulfide and partial sulfide oxidation, comparing the performance obtained with synthetic and real wastewater. A decrease of the sulfate removal rate (SRR) from 108 to 73mgS-SO42-L-1d-1 was observed coupled to an increase in the elemental sulfur recovery from 1.4 to 27mgS-S0L-1d-1. This elemental sulfur recovered as a solid from the real wastewater represented a 64% of the theoretical elemental sulfur produced (the elemental sulfur corresponded to a 72% of the solid weight). In addition, microbial communities analysis of the membrane and cathode biofilms and planktonic biomass showed that the real wastewater allowed a higher growth of sulfur oxidizing bacteria (SOB) adapted to more complex waters as Halothiobacillus sp. while decreasing the relative abundance of sulfate reducing bacteria (SRB).
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Affiliation(s)
- Enric Blázquez
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | - Juan Antonio Baeza
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | - David Gabriel
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | - Albert Guisasola
- GENOCOV, Departament d'Enginyeria Química, Biològica i Ambiental, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
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Kong X, Li C, Wang P, Huang G, Li Z, Han Z. Soil Pollution Characteristics and Microbial Responses in a Vertical Profile with Long-Term Tannery Sludge Contamination in Hebei, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E563. [PMID: 30781422 PMCID: PMC6407015 DOI: 10.3390/ijerph16040563] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/09/2019] [Accepted: 02/09/2019] [Indexed: 11/20/2022]
Abstract
An investigation was made into the effects of tannery sludge on soil chemical properties and microbial communities in a typical soil profile with long-term tannery sludge contamination, North China. The results showed that trivalent chromium (Cr(III)), ammonium, organic nitrogen, salinity and sulfide were the predominant contaminants in tannery sludge. Although the tannery sludge contained high chromium (Cr, 3,0970 mg/kg), the proportion of mobile Cr forms (exchangeable plus carbonate-bound fraction) only accounted for 1.32%. The X-ray diffraction and X-ray photoelectron spectroscopy results further demonstrated that the Cr existed in a stable state of oxides and iron oxides. The alkaline loam soil had a significant retardation effect on the migration of salinity, ammonium, Cr(III) and sulfide, and the accumulation of these contaminants occurred in soils (0⁻40 cm). A good correlation (R² = 0.959) was observed between total organic carbon (TOC) and Cr(III) in the soil profile, indicating that the dissolved organic matter from sludge leachate promoted the vertical mobility of Cr(III) via forming Cr(III)-organic complexes. The halotolerant bacteria (Halomonas and Tepidimicrobium) and organic degrading bacteria (Flavobacteriaceae, Tepidimicrobium and Balneola) became the dominant microflora in the soil profile. High contents of salinity, Cr and nitrogen were the main environmental factors affecting the abundance of indigenous microorganisms in soils.
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Affiliation(s)
- Xiangke Kong
- Institute of Hydrogeology & Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China.
- Hebei and China Geological Survey Key Laboratory of Groundwater Remediation, Institute of Hydrogeology & Environmental Geology, Shijiazhuang, 050061, China.
| | - Chunhui Li
- School of Earth Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450046, China.
| | - Ping Wang
- Institute of Hydrogeology & Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China.
- Hebei and China Geological Survey Key Laboratory of Groundwater Remediation, Institute of Hydrogeology & Environmental Geology, Shijiazhuang, 050061, China.
| | - Guoxin Huang
- Chinese Academy for Environmental Planning, Beijing 100012, China.
| | - Zhitao Li
- Chinese Academy for Environmental Planning, Beijing 100012, China.
| | - Zhantao Han
- Institute of Hydrogeology & Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China.
- Hebei and China Geological Survey Key Laboratory of Groundwater Remediation, Institute of Hydrogeology & Environmental Geology, Shijiazhuang, 050061, China.
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Christiaens MER, De Vrieze J, Clinckemaillie L, Ganigué R, Rabaey K. Anaerobic ureolysis of source-separated urine for NH 3 recovery enables direct removal of divalent ions at the toilet. WATER RESEARCH 2019; 148:97-105. [PMID: 30352325 DOI: 10.1016/j.watres.2018.10.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/01/2018] [Accepted: 10/07/2018] [Indexed: 06/08/2023]
Abstract
Source-separated urine is of interest for nutrient recovery. Most nitrogen recovery technologies rely on ammonia (NH3) as input, which requires ureolysis. As urease positive bacteria are widespread, source-separated urine is unstable, not only leading to NH3 release but also loss, odor nuisance, and downstream scaling. Hence, ureolysis ideally occurs in a closed controlled environment close to the toilet. We characterized microbial-induced ureolysis, subsequent divalent cation precipitation, and fermentation in anaerobic sequencing batch reactors (SBRs) at 15 °C and 28 °C. Temperatures were a proxy for urine hydrolysis in a wet well at street level or in the toilet, respectively. The need for inoculation and the metabolic stability was assessed by inoculation with autofermented urine or a mixture of anaerobic digestion and fermentation sludge. The highest specific ureolysis rates in the SBRs were achieved at 28 °C: 2107 ± 395 and 1948 ± 1121 mg N g VSS-1 d-1, for the mixed and autofermented inoculum, respectively. For Ca2+ and Mg2+ precipitation, and organics fermentation, autofermented urine at 28 °C performed best with 47.9 ± 16.4 mg Ca2+ g VSS-1 d-1, 8.2 ± 4.6 mg Mg2+ g VSS-1 d-1, and 623 ± 129 mg VFA-COD g VSS-1 d-1, respectively. This indicates the hydrolysis reactor should be close to the toilet. The selected inoculum did not impact ureolysis, whereas both Ca2+ and Mg2+ precipitation and fermentation were better in the SBRs with autofermented urine. Ureolysis was identified as the only process significantly impacting the microbial community, indicating external inoculation would not be required. A urine hydrolysis reactor in the toilet without external inoculation could thus serve as a controlled environment to release NH3 and remove divalent cations to prevent scaling in downstream transport and processing. For practical implementation in a household toilet, the reactor should be designed for user-friendly precipitate discharge and odor control.
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Affiliation(s)
- Marlies E R Christiaens
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Jo De Vrieze
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Lorenzo Clinckemaillie
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Ramon Ganigué
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Korneel Rabaey
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium.
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30
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Barbosa SG, Peixoto L, Soares OS, Pereira MFR, Heijne AT, Kuntke P, Alves MM, Pereira MA. Influence of carbon anode properties on performance and microbiome of Microbial Electrolysis Cells operated on urine. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.02.083] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Wang L, Ye L, Yu Y, Jing C. Antimony Redox Biotransformation in the Subsurface: Effect of Indigenous Sb(V) Respiring Microbiota. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:1200-1207. [PMID: 29313683 DOI: 10.1021/acs.est.7b04624] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Anaerobic microbiological antimonate [Sb(V)] respiration is a newly discovered process regulating the Sb redox transformation in soils. However, little is known about the role microbiological Sb(V) respiration plays in the fate of Sb in the subsurface, especially in the presence of sulfate and electron shuttles. Herein, we successfully enriched a Sb(V) reducing microbiota (SbRM) from the subsurface near an active Sb mine. SbRM was dominated by genus Alkaliphilus (18-36%), Clostridiaceae (17-18%), Tissierella (24-27%), and Lysinibacillus (16-37%). The incubation results showed that SbRM reduced 88% of dissolved Sb(V) to Sb(III), but the total Sb mobility remained the same as in the abiotic control, indicating that SbRM alone did not increase the total Sb release but regulated the Sb speciation in the subsurface. Micro X-ray fluorescence (μ-XRF) analysis suggested the association of Sb and Fe, and electron shuttles such as anthraquinone-2,6-disulfonic disodium salt (AQDS) markedly enhanced the Sb release due to its ability to facilitate Fe mineral dissolution. Sb L-edge and S K-edge X-ray absorption near edge structure (XANES) results demonstrated that indigenous SbRM immobilized Sb via Sb2S3 formation, especially in a sulfur-rich environment. The insights gained from this study shed new light on Sb mobilization and its risk assessment in the subsurface environment.
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Affiliation(s)
- Liying Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Li Ye
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Yaqin Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Chuanyong Jing
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
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Yang SH, Ahn HK, Kim BS, Chang SS, Chung KY, Lee EM, Ki KS, Kwon EG. Comparison of bacterial communities in leachate from decomposing bovine carcasses. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 30:1660-1666. [PMID: 28920403 PMCID: PMC5666202 DOI: 10.5713/ajas.17.0553] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/08/2017] [Accepted: 09/15/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Burial is associated with environmental effects such as the contamination of ground or surface water with biological materials generated during the decomposition process. Therefore, bacterial communities in leachates originating from the decomposing bovine carcasses were investigated. METHODS To understand the process of bovine (Hanwoo) carcass decomposition, we simulated burial using a lab-scale reactor with a volume of 5.15 m3. Leachate samples from 3 carcasses were collected using a peristaltic pump once a month for a period of 5 months, and bacterial communities in samples were identified by pyrosequencing of the 16S rRNA gene. RESULTS We obtained a total of 110,442 reads from the triplicate samples of various sampling time points (total of 15 samples), and found that the phylum Firmicutes was dominant at most sampling times. Differences in the bacterial communities at the various time points were observed among the triplicate samples. The bacterial communities sampled at 4 months showed the most different compositions. The genera Pseudomonas and Psychrobacter in the phylum Proteobacteria were dominant in all of the samples obtained after 3 months. Bacillaceae, Clostridium, and Clostridiales were found to be predominant after 4 months in the leachate from one carcass, whereas Planococcaceae was found to be a dominant in samples obtained at the first and second months from the other two carcasses. The results showed that potentially pathogenic microbes such as Clostridium derived from bovine leachate could dominate the soil environment of a burial site. CONCLUSION Our results indicated that the composition of bacterial communities in leachates of a decomposing bovine shifted continuously during the experimental period, with significant changes detected after 4 months of burial.
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Affiliation(s)
- Seung Hak Yang
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25340, Korea
| | - Hee Kwon Ahn
- Department of Animal Biosystems Science, Chungnam National University, Daejeon 34134, Korea
| | - Bong Soo Kim
- Department of Life Science, Hallym University, Chuncheon 24252, Korea
| | - Sun Sik Chang
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25340, Korea
| | - Ki Yong Chung
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25340, Korea
| | - Eun Mi Lee
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25340, Korea
| | - Kwang Seok Ki
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25340, Korea
| | - Eung Gi Kwon
- Hanwoo Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25340, Korea
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Poehlein A, Yutin N, Daniel R, Galperin MY. Proposal for the reclassification of obligately purine-fermenting bacteria Clostridium acidurici (Barker 1938) and Clostridium purinilyticum (Dürre et al. 1981) as Gottschalkia acidurici gen. nov. comb. nov. and Gottschalkiapurinilytica comb. nov. and of Eubacterium angustum (Beuscher and Andreesen 1985) as Andreesenia angusta gen. nov. comb. nov. in the family Gottschalkiaceae fam. nov. Int J Syst Evol Microbiol 2017; 67:2711-2719. [PMID: 28853681 PMCID: PMC5737214 DOI: 10.1099/ijsem.0.002008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Several strictly anaerobic bacteria that are Gram-stain-positive have the ability to use uric acid as the sole source of carbon and energy. The phylogeny of three such species, Clostridium acidurici, Clostridium purinilyticum, and Eubacterium angustum, members of the Clostridium cluster XII that ferment purines, but not most amino acids or carbohydrates, has been re-examined, taking advantage of their recently sequenced genomes. Phylogenetic analyses, based on 16S rRNA gene sequences, protein sequences of RpoB and GyrB, and on a concatenated alignment of 50 ribosomal proteins, revealed tight clustering of C. acidurici and C. purinilyticum. Eubacterium angustum showed consistent association with C. acidurici and C. purinilyticum
, but differed from these two in terms of the genome size, G+C content of its chromosomal DNA and its inability to form spores. We propose reassigning C. acidurici and C. purinilyticum to the novel genus Gottschalkia as Gottschalkia acidurici gen. nov. comb. nov. (the type species of the genus) and Gottschalkia purinilytica comb. nov., respectively. Eubacterium angustum is proposed to be reclassified as Andreesenia angusta gen. nov. comb. nov. Furthermore, based on the phylogenetic data and similar metabolic properties, we propose assigning genera Gottschalkia and Andreesenia to the novel family Gottschalkiaceae. Metagenomic sequencing data indicate the widespread distibution of organisms falling within the radiation of the proposed family Gottschalkiaceae in terrestrial and aquatic habitats from upstate New York to Antarctica, most likely due to their ability to metabolize avian-produced uric acid.
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Affiliation(s)
- Anja Poehlein
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institute of Microbiology and Genetics, Georg-August-University, Göttingen, Germany
| | - Natalya Yutin
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA
| | - Rolf Daniel
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institute of Microbiology and Genetics, Georg-August-University, Göttingen, Germany
| | - Michael Y Galperin
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA
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Vogel H, Shukla SP, Engl T, Weiss B, Fischer R, Steiger S, Heckel DG, Kaltenpoth M, Vilcinskas A. The digestive and defensive basis of carcass utilization by the burying beetle and its microbiota. Nat Commun 2017; 8:15186. [PMID: 28485370 PMCID: PMC5436106 DOI: 10.1038/ncomms15186] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 03/07/2017] [Indexed: 12/22/2022] Open
Abstract
Insects that use ephemeral resources must rapidly digest nutrients and simultaneously protect them from competitors. Here we use burying beetles (Nicrophorus vespilloides), which feed their offspring on vertebrate carrion, to investigate the digestive and defensive basis of carrion utilization. We characterize gene expression and microbiota composition in the gut, anal secretions, and on carcasses used by the beetles. We find a strict functional compartmentalization of the gut involving differential expression of immune effectors (antimicrobial peptides and lysozymes), as well as digestive and detoxifying enzymes. A distinct microbial community composed of Firmicutes, Proteobacteria and a clade of ascomycetous yeasts (genus Yarrowia) is present in larval and adult guts, and is transmitted to the carcass via anal secretions, where the yeasts express extracellular digestive enzymes and produce antimicrobial compounds. Our results provide evidence of potential metabolic cooperation between the host and its microbiota for digestion, detoxification and defence that extends from the beetle's gut to its nutritional resource.
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Affiliation(s)
- Heiko Vogel
- Department of Entomology, Max Planck Institute for Chemical Ecology, D-07745 Jena, Germany
| | - Shantanu P Shukla
- Department of Entomology, Max Planck Institute for Chemical Ecology, D-07745 Jena, Germany.,Max Planck Institute for Chemical Ecology, Research Group Insect Symbiosis, D-07745 Jena, Germany
| | - Tobias Engl
- Max Planck Institute for Chemical Ecology, Research Group Insect Symbiosis, D-07745 Jena, Germany.,Department for Evolutionary Ecology, Johannes Gutenberg University, D-55128 Mainz, Germany
| | - Benjamin Weiss
- Max Planck Institute for Chemical Ecology, Research Group Insect Symbiosis, D-07745 Jena, Germany.,Department for Evolutionary Ecology, Johannes Gutenberg University, D-55128 Mainz, Germany
| | - Rainer Fischer
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), D-52074 Aachen, Germany
| | - Sandra Steiger
- University of Ulm, Institute of Evolutionary Ecology and Conservation Genomics, D-89081 Ulm, Germany
| | - David G Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, D-07745 Jena, Germany
| | - Martin Kaltenpoth
- Max Planck Institute for Chemical Ecology, Research Group Insect Symbiosis, D-07745 Jena, Germany.,Department for Evolutionary Ecology, Johannes Gutenberg University, D-55128 Mainz, Germany
| | - Andreas Vilcinskas
- Institute for Insect Biotechnology, Justus Liebig University of Giessen, D-35392 Giessen, Germany
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35
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Genome Sequence of Creatinine-Fermenting Tissierella creatinophila Strain KRE 4 T (DSM 6911). GENOME ANNOUNCEMENTS 2017; 5:5/12/e00051-17. [PMID: 28336595 PMCID: PMC5364220 DOI: 10.1128/genomea.00051-17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Tissierella creatinophila strain KRE 4T (DSM 6911) is a strictly anaerobic, creatinine-fermenting, and creatine-fermenting organism, which has been isolated from sewage sludge. The draft genome consists of one circular chromosome (2.5 Mb) and harbors 2,533 predicted protein-encoding genes.
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Fujii T, Kyoui D, Takahashi H, Kuda T, Kimura B, Washizu Y, Emoto E, Hiramoto T. Pyrosequencing analysis of the microbiota of kusaya gravy obtained from Izu Islands. Int J Food Microbiol 2016; 238:320-325. [DOI: 10.1016/j.ijfoodmicro.2016.09.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 09/27/2016] [Accepted: 09/28/2016] [Indexed: 10/20/2022]
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37
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Yuan Y, Liu Y, Li B, Wang B, Wang S, Peng Y. Short-chain fatty acids production and microbial community in sludge alkaline fermentation: Long-term effect of temperature. BIORESOURCE TECHNOLOGY 2016; 211:685-690. [PMID: 27060243 DOI: 10.1016/j.biortech.2016.03.138] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 03/22/2016] [Accepted: 03/25/2016] [Indexed: 06/05/2023]
Abstract
Sludge alkaline fermentation has been reported to achieve efficient short-chain fatty acids (SCFAs) production. Temperature played important role in further improved SCFAs production. Long-term SCFAs production from sludge alkaline fermentation was compared between mesotherm (30±2°C) and microtherm (15±2°C). The study of 90days showed that mesotherm led to 2.2-folds production of SCFAs as microtherm and enhanced the production of acetic acid as major component of SCFAs. Soluble protein and carbohydrate at mesotherm was 2.63-folds as that at microtherm due to higher activities of protease and α-glucosidase, guaranteeing efficient substrates to produce SCFAs. Illumina MiSeq sequencing revealed that microtherm increased the abundance of Corynebacterium, Alkaliflexus, Pseudomonas and Guggenheimella, capable of enhancing hydrolysis. Hydrolytic bacteria, i.e. Alcaligenes, Anaerolinea and Ottowia, were enriched at mesotherm. Meanwhile, acidogenic bacteria showed higher abundance at mesotherm than microtherm. Therefore, enrichment of functional bacteria and higher microbial activities resulted in the improved SCFAs at mesotherm.
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Affiliation(s)
- Yue Yuan
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Ye Liu
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Baikun Li
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China; Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Bo Wang
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China.
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Yuan Y, Wang S, Liu Y, Li B, Wang B, Peng Y. Long-term effect of pH on short-chain fatty acids accumulation and microbial community in sludge fermentation systems. BIORESOURCE TECHNOLOGY 2015; 197:56-63. [PMID: 26318922 DOI: 10.1016/j.biortech.2015.08.025] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 08/01/2015] [Accepted: 08/08/2015] [Indexed: 05/06/2023]
Abstract
Long-term effect of pH (4, 10, and uncontrolled) on short-chain fatty acid (SCFA) accumulation, microbial community and sludge reduction were investigated in waste activated sludge (WAS) fermentors for over 90days. The average SCFAs accumulation was 1721.4 (at pH 10), 114.2 (at pH 4), and 58.1 (at uncontrolled pH) mg chemical oxygen demand (COD)/L. About 31.65mgCOD/L was produced at pH 10, accounting for 20% of the influent COD. Illumina MiSeq sequencing revealed that Alcaligenes (hydrolic bacteria) and Erysipelothrix (acidogenic bacteria) were enriched at pH 10, while less acidogenic bacteria existed at pH 4 than pH 10, and no acidogenic bacteria were detected at the uncontrolled pH. The ratios of archaea to bacteria were 1:41, 1:16, and 1:9 at the pH of 10, 4, and uncontrolled. This study elucidated the effects of pH on WAS fermentation, and established the correlation of microbial structure with SCFAs accumulations and sludge reduction.
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Affiliation(s)
- Yue Yuan
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Ye Liu
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Baikun Li
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China; Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Bo Wang
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China.
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Yang SH, Lim JS, Khan MA, Kim BS, Choi DY, Lee EY, Ahn HK. High-throughput nucleotide sequence analysis of diverse bacterial communities in leachates of decomposing pig carcasses. Genet Mol Biol 2015; 38:373-80. [PMID: 26500442 PMCID: PMC4612598 DOI: 10.1590/s1415-475738320140252] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Accepted: 02/10/2015] [Indexed: 12/03/2022] Open
Abstract
The leachate generated by the decomposition of animal carcass has been implicated as an environmental contaminant surrounding the burial site. High-throughput nucleotide sequencing was conducted to investigate the bacterial communities in leachates from the decomposition of pig carcasses. We acquired 51,230 reads from six different samples (1, 2, 3, 4, 6 and 14 week-old carcasses) and found that sequences representing the phylum Firmicutes predominated. The diversity of bacterial 16S rRNA gene sequences in the leachate was the highest at 6 weeks, in contrast to those at 2 and 14 weeks. The relative abundance of Firmicutes was reduced, while the proportion of Bacteroidetes and Proteobacteria increased from 3–6 weeks. The representation of phyla was restored after 14 weeks. However, the community structures between the samples taken at 1–2 and 14 weeks differed at the bacterial classification level. The trend in pH was similar to the changes seen in bacterial communities, indicating that the pH of the leachate could be related to the shift in the microbial community. The results indicate that the composition of bacterial communities in leachates of decomposing pig carcasses shifted continuously during the study period and might be influenced by the burial site.
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Affiliation(s)
- Seung Hak Yang
- Animal Nutrition Physiology Team, National Institute of Animal Science, Jeonbuk, South Korea
| | - Joung Soo Lim
- Animal Environment Division, National Institute of Animal Science, Jeonbuk, South Korea
| | - Modabber Ahmed Khan
- Animal Environment Division, National Institute of Animal Science, Jeonbuk, South Korea
| | - Bong Soo Kim
- Department of Life Sciences, Hallym University, Chuncheon, Gangwon-do, South Korea
| | - Dong Yoon Choi
- Animal Environment Division, National Institute of Animal Science, Jeonbuk, South Korea
| | - Eun Young Lee
- Department of Environmental and Energy Engineering, Suwon University, South Korea
| | - Hee Kwon Ahn
- Department of Animal Biosystems Science, Chungnam National University, Daejeon, South Korea
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Ng KK, Shi X, Ng HY. Evaluation of system performance and microbial communities of a bioaugmented anaerobic membrane bioreactor treating pharmaceutical wastewater. WATER RESEARCH 2015; 81:311-324. [PMID: 26086149 DOI: 10.1016/j.watres.2015.05.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 05/15/2015] [Accepted: 05/17/2015] [Indexed: 06/04/2023]
Abstract
In this study, a control anaerobic membrane bioreactor (C-AnMBR) and a bioaugmented anaerobic membrane bioreactor (B-AnMBR) were operated for 210 d to treat pharmaceutical wastewater. Both the bioreactors were fed with the pharmaceutical wastewater containing TCOD of 16,249 ± 714 mg/L and total dissolved solids (TDS) of 29,450 ± 2209 mg/L with an organic loading rate (OLR) of 13.0 ± 0.6 kgCOD/m(3)d. Under steady-state condition, an average total chemical oxygen demand (TCOD) removal efficiency of 46.1 ± 2.9% and 60.3 ± 2.8% was achieved by the C-AnMBR and the B-AnMBR, respectively. The conventional anaerobes in the C-AnMBR cannot tolerate the hypersaline conditions well, resulting in lower TCOD removal efficiency, biogas production and methane yield than the B-AnMBR seeded from the coastal shore. Pyrosequencing analysis indicated that marine bacterial species (Oliephilus sp.) and halophilic bacterial species (Thermohalobacter sp.) were only present in the B-AnMBR; these species could possibly degrade complex and recalcitrant organic matter and withstand hypersaline environments. Two different dominant archaeal communities, genus Methanosaeta (43.4%) and Methanolobus (61.7%), were identified as the dominant methanogens in the C-AnMBR and the B-AnMBR, respectively. The species of genus Methanolobus was reported resistant to penicillin and required sodium and magnesium for growth, which could enable it to thrive in the hypersaline environment.
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Affiliation(s)
- Kok Kwang Ng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
| | - Xueqing Shi
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
| | - How Yong Ng
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore.
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Cho S, Hwang O, Park S. Effect of Dietary Protein Levels on Composition of Odorous Compounds and Bacterial Ecology in Pig Manure. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2015; 28:1362-70. [PMID: 26194219 PMCID: PMC4554878 DOI: 10.5713/ajas.15.0078] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/23/2015] [Accepted: 04/03/2015] [Indexed: 01/10/2023]
Abstract
This study was performed to investigate the effect of different levels of dietary crude protein (CP) on composition of odorous compounds and bacterial communities in pig manure. A total of 48 male pigs (average initial body weight 45 kg) fed diets containing three levels of dietary CP (20%, 17.5%, and 15%) and their slurry samples were collected from the pits under the floor every week for one month. Changes in composition of odorous compounds and bacterial communities were analyzed by gas chromatography and 454 FLX titanium pyrosequencing systems, respectively. Levels of phenols, indoles, short chain fatty acid and branched chain fatty acid were lowest (p<0.05) in CP 15% group among three CP levels. Relative abundance of Bacteroidetes phylum and bacterial genera including Leuconostoc, Bacillus, Atopostipes, Peptonphilus, Ruminococcaceae_uc, Bacteroides, and Pseudomonas was lower (p<0.05) in CP 15% than in CP 20% group. There was a positive correlation (p<0.05) between odorous compounds and bacterial genera: phenol, indole, iso-butyric acid, and iso-valeric acid with Atopostipes, p-cresol and skatole with Bacteroides, acetic acid and butyric acid with AM982595_g of Porphyromonadaceae family, and propionic acid with Tissierella. Taken together, administration of 15% CP showed less production of odorous compounds than 20% CP group and this result might be associated with the changes in bacterial communities especially whose roles in protein metabolism.
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Affiliation(s)
- Sungback Cho
- Department of Food Science and Technology, Sejong University, Seoul 143-747, Korea
| | - Okhwa Hwang
- Department of Food Science and Technology, Sejong University, Seoul 143-747, Korea
| | - Sungkwon Park
- Department of Food Science and Technology, Sejong University, Seoul 143-747, Korea
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Luo J, Feng L, Chen Y, Li X, Chen H, Xiao N, Wang D. Stimulating short-chain fatty acids production from waste activated sludge by nano zero-valent iron. J Biotechnol 2014; 187:98-105. [DOI: 10.1016/j.jbiotec.2014.07.444] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/19/2014] [Accepted: 07/25/2014] [Indexed: 11/26/2022]
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Ziganshina EE, Bagmanova AR, Khilyas IV, Ziganshin AM. Assessment of a biogas-generating microbial community in a pilot-scale anaerobic reactor. J Biosci Bioeng 2014; 117:730-6. [DOI: 10.1016/j.jbiosc.2013.11.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 09/25/2013] [Accepted: 11/18/2013] [Indexed: 10/25/2022]
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Huang L, Chen B, Pistolozzi M, Wu Z, Wang J. Inoculation and alkali coeffect in volatile fatty acids production and microbial community shift in the anaerobic fermentation of waste activated sludge. BIORESOURCE TECHNOLOGY 2014; 153:87-94. [PMID: 24345567 DOI: 10.1016/j.biortech.2013.11.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 11/14/2013] [Accepted: 11/20/2013] [Indexed: 06/03/2023]
Abstract
Batch fermentations of waste activated sludge (WAS) at alkaline pH with different inocula were performed. Paper mill anaerobic granular sludge (PAS) and dyeing mill anaerobic sludge (DAS) were used as inocula. At pH 10 the inoculation did not increase the volatile fatty acids (VFAs) production compared to the non-inoculated samples fermented in the same conditions, and the maximal VFAs yield of non-inoculated WAS was higher than inoculated WAS. However, at pH 9 the inoculation with PAS increased the sludge hydrolysis and VFAs production was 1.7-fold higher than that in non-inoculated WAS (yield 52.40mg/g of volatile solid). Denaturing gradient gel electrophoresis analysis revealed that 3 bacterial species, identified as Proteocatella, Tepidibacter, and Clostridium, disappeared when inoculated with PAS at pH 9 or at pH⩾10. The results showed that the inoculation with PAS can be helpful to achieve a relatively high VFAs production from WAS in a moderate alkaline environment.
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Affiliation(s)
- Long Huang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Ben Chen
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Marco Pistolozzi
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Zhenqiang Wu
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China.
| | - Jufang Wang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
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Alauzet C, Marchandin H, Courtin P, Mory F, Lemée L, Pons JL, Chapot-Chartier MP, Lozniewski A, Jumas-Bilak E. Multilocus analysis reveals diversity in the genus Tissierella: Description of Tissierella carlieri sp. nov. in the new class Tissierellia classis nov. Syst Appl Microbiol 2014; 37:23-34. [DOI: 10.1016/j.syapm.2013.09.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 07/25/2013] [Accepted: 09/27/2013] [Indexed: 10/26/2022]
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Kaltenpoth M, Steiger S. Unearthing carrion beetles' microbiome: characterization of bacterial and fungal hindgut communities across the Silphidae. Mol Ecol 2013; 23:1251-1267. [PMID: 24102980 DOI: 10.1111/mec.12469] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 12/26/2022]
Abstract
Carrion beetles (Coleoptera, Silphidae) are well known for their behaviour of exploiting vertebrate carcasses for nutrition. While species in the subfamily Silphinae feed on large carcasses and on larvae of competing scavengers, the Nicrophorinae are unique in monopolizing, burying and defending small carrion, and providing extensive biparental care. As a first step towards investigating whether microbial symbionts may aid in carcass utilization or defence, we characterized the microbial hindgut communities of six Nicrophorinae (Nicrophorus spp.) and two Silphinae species (Oiceoptoma noveboracense and Necrophila americana) by deep ribosomal RNA amplicon sequencing. Across all species, bacteria in the family Xanthomonadaceae, related to Ignatzschineriao larvae, were consistently common, and several other taxa were present in lower abundance (Enterobacteriales, Burkholderiales, Bacilli, Clostridiales and Bacteroidales). Additionally, the Nicrophorinae showed high numbers of unusual Clostridiales, while the Silphinae were characterized by Flavobacteriales and Rhizobiales (Bartonella sp.). In addition to the complex community of bacterial symbionts, each species of carrion beetle harboured a diversity of ascomycetous yeasts closely related to Yarrowia lipolytica. Despite the high degree of consistency in microbial communities across the Silphidae--specifically within the Nicrophorinae--both the fungal symbiont phylogeny and distance-based bacterial community clustering showed higher congruence with sampling locality than host phylogeny. Thus, despite the possibility for vertical transmission via anal secretions, the distinct hindgut microbiota of the Silphidae appears to be shaped by frequent horizontal exchange or environmental uptake of symbionts. The microbial community profiles, together with information on host ecology and the metabolic potential of related microorganisms, allow us to propose hypotheses on putative roles of the symbionts in carcass degradation, detoxification and defence.
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Affiliation(s)
- Martin Kaltenpoth
- Insect Symbiosis Research Group, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany
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Rezgui R, Maaroufi A, Fardeau ML, Ben Ali Gam Z, Cayol JL, Ben Hamed S, Labat M. Anaerosalibacter bizertensis gen. nov., sp. nov., a halotolerant bacterium isolated from sludge. Int J Syst Evol Microbiol 2011; 62:2469-2474. [PMID: 22140152 DOI: 10.1099/ijs.0.036566-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A strictly anaerobic, halotolerant and thermotolerant strain, designated C5BEL(T), was isolated in north Tunisia from storage tanks holding waste generated by the recycling of discarded motor oils. Cells of strain C5BEL(T) were Gram-stain-positive, motile by laterally inserted flagella, straight, and spore-forming. Their two major fatty acids were iso-C(15 : 0) and iso-C(15 : 0) dimethyl acetal. Growth was observed at temperatures of 25-55 °C (optimum, 40 °C) and at pH 6-9 (optimum, pH 7.5). The salinity range for growth was 0-100 g l(-1) NaCl (optimum, 5 g l(-1)). Yeast extract was required for growth. Strain C5BEL(T) was heterotrophic, able to use glucose, pyruvate, succinate, yeast extract, bio-trypticase and peptone, but unable to grow on Casamino acids. Sulfate, thiosulfate, sulfite, elemental sulfur, fumarate, nitrate and nitrite were not reduced. The DNA G+C content of strain C5BEL(T) was 31.1 mol%. 16S rRNA gene sequence analysis indicated that strain C5BEL(T) was a member of the family Clostridiaceae, class Clostridia, phylum Firmicutes and was most closely related to Sporanaerobacter acetigenes Lup33(T) ( = DSM 13106(T)) (92.4 % similarity). On the basis of 16S rRNA gene sequence comparisons and physiological characteristics, strain C5BEL(T) can be classified as a novel species in a new genus, for which the name Anaerosalibacter bizertensis gen. nov., sp. nov. is proposed. The type strain of the type species is C5BEL(T) ( = DSM 23801(T) = JCM 17239(T)).
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Affiliation(s)
- Raja Rezgui
- Laboratoire de Microbiologie IRD, Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MI0, UM110, 163 avenue de Luminy, case 925, F-13288 Marseille cedex 9, France
- Laboratoire de Microbiologie, Groupe des Bioprocédés, Institut Pasteur de Tunis (IPT), BP 74, 13 place Pasteur, Belvédère-1002, Tunis, Tunisia
| | - Abderrazak Maaroufi
- Laboratoire de Microbiologie, Groupe des Bioprocédés, Institut Pasteur de Tunis (IPT), BP 74, 13 place Pasteur, Belvédère-1002, Tunis, Tunisia
| | - Marie-Laure Fardeau
- Laboratoire de Microbiologie IRD, Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MI0, UM110, 163 avenue de Luminy, case 925, F-13288 Marseille cedex 9, France
| | - Zouhaier Ben Ali Gam
- Laboratoire de Microbiologie IRD, Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MI0, UM110, 163 avenue de Luminy, case 925, F-13288 Marseille cedex 9, France
| | - Jean-Luc Cayol
- Laboratoire de Microbiologie IRD, Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MI0, UM110, 163 avenue de Luminy, case 925, F-13288 Marseille cedex 9, France
| | - Saïd Ben Hamed
- Laboratoire de Microbiologie, Groupe des Bioprocédés, Institut Pasteur de Tunis (IPT), BP 74, 13 place Pasteur, Belvédère-1002, Tunis, Tunisia
| | - Marc Labat
- Laboratoire de Microbiologie IRD, Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MI0, UM110, 163 avenue de Luminy, case 925, F-13288 Marseille cedex 9, France
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Bae JW, Park JR, Chang YH, Rhee SK, Kim BC, Park YH. Clostridium hastiforme is a later synonym of Tissierella praeacuta. Int J Syst Evol Microbiol 2004; 54:947-949. [PMID: 15143047 DOI: 10.1099/ijs.0.63068-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The previously proposed species Clostridium hastiforme and Tissierella praeacuta appear to be similar from their published descriptions. Accordingly, the aim of the current study was to perform phenotypic and genetic analyses of the type strains of both species, in order to clarify their taxonomic positions. The type strains of C. hastiforme (DSM 5675(T)) and T. praeacuta (NCTC 11158(T)) exhibited identical biochemical profiles and their 16S rRNA gene sequences displayed 99.9 % similarity. DNA-DNA hybridization was also estimated to be 96.5 %. Thus, it was concluded that C. hastiforme and T. praeacuta are synonyms, where T. praeacuta has priority. An emended description of the genus Tissierella is also given.
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Affiliation(s)
- Jin-Woo Bae
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejon, Korea
| | - Ja Ryeong Park
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejon, Korea
| | - Young-Hyo Chang
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejon, Korea
| | - Sung-Keun Rhee
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejon, Korea
| | - Byung-Chun Kim
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejon, Korea
| | - Yong-Ha Park
- National Research Laboratory of Molecular Ecosystematics, Institute of Probionic, Probionic Corporation, Bio-venture Center, KRIBB, PO Box 115, Yusong, Daejon, Korea
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Daejon, Korea
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Abstract
The goal of this review is to present a comprehensive survey of the many intriguing facets of creatine (Cr) and creatinine metabolism, encompassing the pathways and regulation of Cr biosynthesis and degradation, species and tissue distribution of the enzymes and metabolites involved, and of the inherent implications for physiology and human pathology. Very recently, a series of new discoveries have been made that are bound to have distinguished implications for bioenergetics, physiology, human pathology, and clinical diagnosis and that suggest that deregulation of the creatine kinase (CK) system is associated with a variety of diseases. Disturbances of the CK system have been observed in muscle, brain, cardiac, and renal diseases as well as in cancer. On the other hand, Cr and Cr analogs such as cyclocreatine were found to have antitumor, antiviral, and antidiabetic effects and to protect tissues from hypoxic, ischemic, neurodegenerative, or muscle damage. Oral Cr ingestion is used in sports as an ergogenic aid, and some data suggest that Cr and creatinine may be precursors of food mutagens and uremic toxins. These findings are discussed in depth, the interrelationships are outlined, and all is put into a broader context to provide a more detailed understanding of the biological functions of Cr and of the CK system.
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Affiliation(s)
- M Wyss
- F. Hoffmann-La Roche, Vitamins and Fine Chemicals Division, Basel, Switzerland.
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50
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Andreesen JR, Wagner M, Sonntag D, Kohlstock M, Harms C, Gursinsky T, Jäger J, Parther T, Kabisch U, Gräntzdörffer A, Pich A, Söhling B. Various functions of selenols and thiols in anaerobic gram-positive, amino acids-utilizing bacteria. Biofactors 1999; 10:263-70. [PMID: 10609892 DOI: 10.1002/biof.5520100226] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Electron transfer reactions for the reduction of glycine in Eubacterium acidaminophilum involve many selenocysteine (U)- and thiol-containing proteins, as shown by biochemical and molecular analysis. These include an unusual thioredoxin system (-CXXC-), protein A (-CXXU-) and the substrate-specific protein B of glycine reductase (-UXXCXXC-). Most probably a selenoether is formed at protein B by splitting the C-N-bond after binding of the substrate. The carboxymethyl group is then transferred to the selenocysteine of protein A containing a conserved motif. The latter protein acts as a carbon and electron donor by giving rise to a protein C-bound acetyl-thioester and a mixed selenide-sulfide bond at protein A that will be reduced by the thioredoxin system. The dithiothreitol-dependent D-proline reductase of Clostridium sticklandii exhibits many similarities to protein B of glycine reductase including the motif containing selenocysteine. In both cases proprotein processing at a cysteine residue gives rise to a blocked N-terminus, most probably a pyruvoyl group. Formate dehydrogenase and some other proteins from E. acidaminophilum contain selenocysteine, e.g., a 22 kDa protein showing an extensive homology to peroxiredoxins involved in the detoxification of peroxides.
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Affiliation(s)
- J R Andreesen
- Institut für Mikrobiologie, Martin-Luther Universität Halle-Wittenberg, Germany.
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