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Li X, Gao X, Cheng M, Lu X, Zhao Z. Augmentation of saline wastewater treatment via functional enrichment of bacteria and optimized distribution in constructed wetlands combined with slag-sponges at different temperatures. CHEMOSPHERE 2024; 358:142194. [PMID: 38692369 DOI: 10.1016/j.chemosphere.2024.142194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/24/2024] [Accepted: 04/27/2024] [Indexed: 05/03/2024]
Abstract
China's aquatic environment continues to face several difficulties. Ecological constructed wetland systems (CWs) can be used to treat polluted saline water to alleviate water shortages regionally and globally. However, the performance is limited by low temperatures. To expand the use of CWs, we introduced a slag-sponge, a flaky material derived from alkaline waste slag, to create a newly constructed wetland system that can operate at both low and high temperatures. We evaluated its effectiveness by placing it at different heights in our devices. The results showed that the treatment was effective for saline wastewater with multiple contaminants. The efficiency was 20% higher than that of traditional CWs. Slag-sponges were found to carry pore structures and exhibit thermal insulation, which led to the enrichment of functional microbial communities (Chryseobacterium and Exiguerium) at low temperatures according to the microbial species analysis. The enhanced CWs offer another option for the treatment of polluted saline water in the environment and provide promising strategies for the utilization of waste slag.
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Affiliation(s)
- Xiao Li
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, China; Shanghai Textile Architecture Design and Research Institute Co., Ltd., Shanghai, China
| | - Xueqing Gao
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, China
| | - Mengqi Cheng
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, China; Department of Chemical, Biological and Environmental Engineering, Autonomous University of Barcelona, Spain
| | - Xian Lu
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, China
| | - Zhimiao Zhao
- College of Oceanography and Ecological Science, Shanghai Ocean University, Engineering Research Center for Water Environment Ecology in Shanghai, China; Hebei Key Laboratory of Wetland Ecology and Conservation, Hengshui, Hebei, China.
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2
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Wang L, Cui YW. Mutualistic symbiosis of fungi and nitrogen-fixing bacteria in halophilic aerobic granular sludge treating nitrogen-deficient hypersaline organic wastewater. BIORESOURCE TECHNOLOGY 2024; 394:130183. [PMID: 38092076 DOI: 10.1016/j.biortech.2023.130183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/06/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Hypersaline organic wastewater is characterized as being nitrogen-deficient, and is easily prone to sludge bulking. In this study, the stability of halophilic aerobic granular sludge (HAGS) for the treatment of hypersaline organic wastewater is explored. Along with the decrease of influent ammonium, the bacterial population substantially reduced, whereas the fungal population continuously increased in HAGS. Saccharomycetales in fungi become the dominant sequence (99.78%) in HAGS bulking. Additionally, Halanaerobium (77.47%) remained prevalent in HAGS despite bacterial washout. Halanaerobium, a nitrogen-fixing genus of bacteria, provided nitrogen for ammonium-assimilating fungi. Saccharomycetales encapsulating HAGS reduced the transfer efficiency of dissolved oxygen, thereby creating favorable growth conditions for Halanaerobium. This paper for the first time highlights the mutualistic symbiosis of fungi and bacteria in HAGS treating the hypersaline organic wastewater. The study lays the foundation for the control and recovery of HAGS bulking.
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Affiliation(s)
- Ling Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
| | - You-Wei Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China.
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3
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Chen J, Xue Y, Yang D, Ma S, Lin Y, Wang H, Wang Y, Ren H, Xu K. Optimizing waste molasses utilization to enhance electron transfer via micromagnetic carriers: Mechanisms and high-nitrate wastewater denitrification performance. ENVIRONMENTAL RESEARCH 2024; 242:117709. [PMID: 37993049 DOI: 10.1016/j.envres.2023.117709] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/10/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
The biological denitrification of high-nitrate wastewater (HNW) is primarily hindered by insufficient carbon sources and excessive nitrite accumulation. In this study, micromagnetic carriers with varying micromagnetic field (MMF) strengths (0.0, 0.3, 0.6, 0.9 mT) were employed to enhance the denitrification of HNW using waste molasses (WMs) as a carbon source. The results revealed that 0.6 mT MMF significantly improved the total nitrogen removal (TN) efficiency at 96.3%. A high nitrate (NO3--N) removal efficiency at 99.3% with a low nitrite (NO2--N) accumulation at 25.5 mg/L was achieved at 0.6 mT MMF. The application of MMF facilitated the synthesis of adenosine triphosphate (ATP) and stimulated denitrifying enzymes (e.g., nitrate reductase (NAR), nitrite reductase (NIR), and nitric oxide reductase (NOR)), which thereby promoting denitrification. Moreover, the effluent chemical oxygen demand (COD), tryptophan and fulvic-like substances exhibited their lowest levels at 0.6 mT MMF. Analysis through 16S ribosomal ribonucleic acid gene sequencing indicated a significant enrichment of denitrifying bacteria including Castellaniella Klebsiella under the influence of MMF. Besides, the proliferation of Acholeplasma, Klebsiella and Proteiniphilum at 0.6 mT MMF promoted the hydrolysis and acidification of WMs. This study offers new insights into the enhanced utilization of WMs and the denitrification of HNW through the application of MMF.
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Affiliation(s)
- Jiahui Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Yi Xue
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Dongli Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Sijia Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Yuan Lin
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Haiyue Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Yanru Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China.
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4
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Sui C, Nie Z, Liu H, Boczkaj G, Liu W, Kong L, Zhan J. Singlet oxygen-dominated peroxymonosulfate activation by layered crednerite for organic pollutants degradation in high salinity wastewater. J Environ Sci (China) 2024; 135:86-96. [PMID: 37778844 DOI: 10.1016/j.jes.2023.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 01/07/2023] [Accepted: 01/08/2023] [Indexed: 10/03/2023]
Abstract
Advanced oxidation processes have been widely studied for organic pollutants treatment in water, but the degradation performance of radical-dominated pathway was severely inhibited by the side reactions between the anions and radicals, especially in high salinity conditions. Here, a singlet oxygen (1O2)-dominated non-radical process was developed for organic pollutants degradation in high salinity wastewater, with layered crednerite (CuMnO2) as catalysts and peroxymonosulfate (PMS) as oxidant. Based on the experiments and density functional theory calculations, 1O2 was the dominating reactive species and the constructed Cu-O-Mn with electron-deficient Mn captured electron from PMS promoting the generation of 1O2. The rapid degradation of bisphenol A (BPA) was achieved by CuMnO2/PMS system, which was 5-fold and 21-fold higher than that in Mn2O3/PMS system and Cu2O/PMS system. The CuMnO2/PMS system shown prominent BPA removal performance under high salinity conditions, prominent PMS utilization efficiency, outstanding total organic carbon removal rate, wide range of applicable pH and good stability. This work unveiled that the 1O2-dominated non-radical process of CuMnO2/PMS system overcame the inhibitory effect of anions in high salinity conditions, which provided a promising technique to remove organic pollutants from high saline wastewater.
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Affiliation(s)
- Chengji Sui
- Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan 250100, China
| | - Zixuan Nie
- Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan 250100, China
| | - Huan Liu
- Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan 250100, China
| | - Grzegorz Boczkaj
- Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of Sanitary Engineering, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland; EkoTech Center, Gdansk University of Technology, G. Narutowicza St. 11/12, 80-233 Gdansk, Poland
| | - Weizhen Liu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510006, China
| | - Lingshuai Kong
- Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan 250100, China.
| | - Jinhua Zhan
- Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan 250100, China.
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Xu T, Mitra R, Tan D, Li Z, Zhou C, Chen T, Xie Z, Han J. Utilization of gene manipulation system for advancing the biotechnological potential of halophiles: A review. Biotechnol Adv 2024; 70:108302. [PMID: 38101552 DOI: 10.1016/j.biotechadv.2023.108302] [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: 10/09/2023] [Revised: 12/02/2023] [Accepted: 12/09/2023] [Indexed: 12/17/2023]
Abstract
Halophiles are salt-loving microorganisms known to have their natural resistance against media contamination even when cultivated in nonsterile and continuous bioprocess system, thus acting as promising cell factories for Next Generation of Industrial Biotechnology (NGIB). NGIB - a successor to the traditional industrial biotechnology, is a more sustainable and efficient bioprocess technology while saving energy and water in a more convenient way as well as reducing the investment cost and skilled workforce requirement. Numerous studies have achieved intriguing outcomes during synthesis of different metabolite using halophiles such as polyhydroxyalkanoates (PHA), ectoine, biosurfactants, and carotenoids. Present-day development in genetic maneuverings have shown optimistic effects on the industrial applications of halophiles. However, viable and competent genetic manipulation system and gene editing tools are critical to accelerate the process of halophile engineering. With the aid of such powerful gene manipulation systems, exclusive microbial chassis are being crafted with desirable features to breed another innovative area of research such as synthetic biology. This review provides an aerial perspective on how the expansion of adaptable gene manipulation toolkits in halophiles are contributing towards biotechnological advancement, and also focusses on their subsequent application for production improvement. This current methodical and comprehensive review will definitely help the scientific fraternity to bridge the gap between challenges and opportunities in halophile engineering.
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Affiliation(s)
- Tong Xu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Ruchira Mitra
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; International College, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Dan Tan
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Zhengjun Li
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Cheng Zhou
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; College of Biochemical Engineering, Beijing Union University, Beijing 100023, People's Republic of China
| | - Tao Chen
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Zhengwei Xie
- Peking University International Cancer Institute, Health Science Center, Peking University, Beijing 100191, People's Republic of China
| | - Jing Han
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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Biswas J, Sarkar HS, Paul AK, Mandal S. Simultaneous conversion of chromium and malachite green coexists in halophilic bacterium Halomonas xianhensis SUR308 isolated from a solar saltern. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:118881-118896. [PMID: 37922074 DOI: 10.1007/s11356-023-30652-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 10/20/2023] [Indexed: 11/05/2023]
Abstract
Many industries are known to use heavy metals like chromium (Cr) to fix dyes in the fabrication processes and malachite green (MG) as colorant. Alkalinity, elevated temperature, or salinity of the industrial effluents makes conventional physicochemical removal of MG and hexavalent chromium [Cr(VI)] more difficult to apply and demands to perceive potential cost-effective and environment-friendly treatment methods to eliminate or convert them into less toxic compounds. Here, we report simultaneous removal and bioconversion of MG and Cr(VI) by a halophilic biofilm-forming bacterium Halomonas xianhensis SUR308. It can efficiently produce exopolysaccharides as extracellular polymeric substances (EPS) and form biofilm under oxygen limiting condition. The reduction of hexavalent chromium [Cr(VI)] to trivalent chromium [Cr(III)] is about 100%, and 95% after 84 h of growth in shaken and stagnant culture, respectively. The strain completely decolorizes MG after 48 h of growth in shaken culture. Furthermore, we found that strain SUR308 can efficiently detoxify chromium by reduction and degrades MG via producing various intermediate products simultaneously. Most interestingly, such conversions can also take place in alkaline environment and in environment where substantial amount of salt is present. These unique features of strain SUR308 make it suitable for the simultaneous remediation of toxic heavy metals and hazardous dye even from the environment having higher pH and salinity. The detail molecular mechanism of the bioconversion with its application in open environment would be the future research focus for bioprospecting strain SUR308.
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Affiliation(s)
- Jhuma Biswas
- Laboratory of Molecular Bacteriology, Department of Microbiology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India
| | - Himadri Sekhar Sarkar
- Department of Organic and Medicinal Chemistry, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal, 700032, India
| | - Amal Kanti Paul
- Microbiology Laboratory, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India
| | - Sukhendu Mandal
- Laboratory of Molecular Bacteriology, Department of Microbiology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India.
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Feng Y, Cui J, Xu B, Jiang Y, Fu C, Tan L. A Potentially Practicable Halotolerant Yeast Meyerozyma guilliermondii A4 for Decolorizing and Detoxifying Azo Dyes and Its Possible Halotolerance Mechanisms. J Fungi (Basel) 2023; 9:851. [PMID: 37623622 PMCID: PMC10456123 DOI: 10.3390/jof9080851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 08/09/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
In this study, a halotolerant yeast that is capable of efficiently decolorizing and detoxifying azo dyes was isolated, identified and characterized for coping with the treatment of azo-dye-containing wastewaters. A characterization of the yeast, including the optimization of its metabolism and growth conditions, its detoxification effectiveness and the degradation pathway of the target azo dye, as well as a determination of the key activities of the enzyme, was performed. Finally, the possible halotolerance mechanisms of the yeast were proposed through a comparative transcriptome analysis. The results show that a halotolerant yeast, A4, which could decolorize various azo dyes, was isolated from a marine environment and was identified as Meyerozyma guilliermondii. Its optimal conditions for dye decolorization were ≥1.0 g/L of sucrose, ≥0.2 g/L of (NH4)2SO4, 0.06 g/L of yeast extract, pH 6.0, a temperature of 35 °C and a rotation speed of ≥160 rpm. The yeast, A4, degraded and detoxified ARB through a series of steps, relying on the key enzymes that might be involved in the degradation of azo dye and aromatic compounds. The halotolerance of the yeast, A4, was mainly related to the regulation of the cell wall components and the excessive uptake of Na+/K+ and/or compatible organic solutes into the cells under different salinity conditions. The up-regulation of genes encoding Ca2+-ATPase and casein kinase II as well as the enrichment of KEGG pathways associated with proteasome and ribosome might also be responsible for its halotolerance.
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Affiliation(s)
- Yue Feng
- Key Laboratory of Plant Biotechnology of Liaoning Province, School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.F.); (J.C.); (Y.J.); (C.F.)
| | - Jingru Cui
- Key Laboratory of Plant Biotechnology of Liaoning Province, School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.F.); (J.C.); (Y.J.); (C.F.)
| | - Bingwen Xu
- Dalian Center for Certification and Food and Drug Control, Dalian 116037, China;
| | - Yifan Jiang
- Key Laboratory of Plant Biotechnology of Liaoning Province, School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.F.); (J.C.); (Y.J.); (C.F.)
| | - Chunqing Fu
- Key Laboratory of Plant Biotechnology of Liaoning Province, School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.F.); (J.C.); (Y.J.); (C.F.)
| | - Liang Tan
- Key Laboratory of Plant Biotechnology of Liaoning Province, School of Life Science, Liaoning Normal University, Dalian 116081, China; (Y.F.); (J.C.); (Y.J.); (C.F.)
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Xu SS, Lai QL, Liu ZZ, Xu Y. Paracoccus onchidii sp. nov., a moderately halophilic bacterium isolated from a marine invertebrate from the South China Sea. Antonie Van Leeuwenhoek 2023:10.1007/s10482-023-01848-7. [PMID: 37231142 DOI: 10.1007/s10482-023-01848-7] [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: 02/28/2023] [Accepted: 05/18/2023] [Indexed: 05/27/2023]
Abstract
A novel moderately halophilic bacterial strain, designated Z330T, was isolated from the egg of a marine invertebrate of the genus Onchidium collected in the South China Sea. The 16S rRNA gene sequence of strain Z330T exhibited the highest similarity value to that of the type strain Paracoccus fistulariae KCTC 22803T (97.6%), Paracoccus seriniphilus NBRC 100798T (97.6%) and Paracoccus aestuarii DSM 19484T (97.6%). Phylogenomic and 16S rRNA phylogenetic analysis showed that strain Z330T was most closely related to P. seriniphilus NBRC 100798T and P. fistulariae KCTC 22803T. Strain Z330T grew optimally at 28-30 °C, pH 7.0-8.0 with the presence of 5.0-7.0% (w/v) NaCl. In addition, growth of strain Z330T occurred at 0.5-16% NaCl, indicated strain Z330T was a moderately halophilic and halotolerant bacterium of genus Paracoccus. The predominant respiratory quinone in strain Z330T was identified as ubiquinone-10. The major polar lipids of strain Z330T were phosphatidylcholine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylmonomethylethanolamine, glycolipid and six unidentified polar lipids. The major fatty acids of strain Z330T was summed feature 8 (C18:1 ω6c and/or C18:1 ω7c). The draft genome sequence of strain Z330T includes 4,084,570 bp in total (N50 = 174,985 bp) with a medium read coverage of 463.6 × and 83 scaffolds. The DNA G + C content of strain Z330T was 60.5%. In silico DNA-DNA hybridization with the four type strains showed 20.5, 22.3, 20.1 and 20.1% relatedness to Paracoccus fistulariae KCTC 22803T, Paracoccus seriniphilus NBRC 100798T, Paracoccus aestuarii DSM 19484T and Paracoccus denitrificans 1A10901T, respectively. And the average nucleotide identity (ANIb) values between strain Z330T and these four type strains were 76.2, 80.0, 75.8 and 73.8%, respectively, lower than the 95-96% threshold value for dividing prokaryotic species. On the basis of the phenotypic, phylogenetic, phylogenomic and chemotaxonomic properties, a novel species of the genus Paracoccus, Paracoccus onchidii sp. nov. is proposed with the type strain Z330T (= KCTC 92727T = MCCC 1K08325T).
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Affiliation(s)
- Shan-Shan Xu
- Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518055, People's Republic of China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China
| | - Qi-Liang Lai
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, People's Republic of China
| | - Zeng-Zhi Liu
- Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518055, People's Republic of China.
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
| | - Ying Xu
- Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, Shenzhen Engineering Laboratory for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518055, People's Republic of China
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Masmoudi F, Alsafran M, Jabri HA, Hosseini H, Trigui M, Sayadi S, Tounsi S, Saadaoui I. Halobacteria-Based Biofertilizers: A Promising Alternative for Enhancing Soil Fertility and Crop Productivity under Biotic and Abiotic Stresses-A Review. Microorganisms 2023; 11:1248. [PMID: 37317222 DOI: 10.3390/microorganisms11051248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/03/2023] [Accepted: 05/06/2023] [Indexed: 06/16/2023] Open
Abstract
Abiotic and biotic stresses such as salt stress and fungal infections significantly affect plant growth and productivity, leading to reduced crop yield. Traditional methods of managing stress factors, such as developing resistant varieties, chemical fertilizers, and pesticides, have shown limited success in the presence of combined biotic and abiotic stress factors. Halotolerant bacteria found in saline environments have potential as plant promoters under stressful conditions. These microorganisms produce bioactive molecules and plant growth regulators, making them a promising agent for enhancing soil fertility, improving plant resistance to adversities, and increasing crop production. This review highlights the capability of plant-growth-promoting halobacteria (PGPH) to stimulate plant growth in non-saline conditions, strengthen plant tolerance and resistance to biotic and abiotic stressors, and sustain soil fertility. The major attempted points are: (i) the various abiotic and biotic challenges that limit agriculture sustainability and food safety, (ii) the mechanisms employed by PGPH to promote plant tolerance and resistance to both biotic and abiotic stressors, (iii) the important role played by PGPH in the recovery and remediation of agricultural affected soils, and (iv) the concerns and limitations of using PGHB as an innovative approach to boost crop production and food security.
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Affiliation(s)
- Fatma Masmoudi
- Biotechnology Program, Center for Sustainable Development, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
| | - Mohammed Alsafran
- Central Laboratories Unit (CLU), Office of VP for Research & Graduate Studies, Qatar University, Doha P.O. Box 2713, Qatar
- Agricultural Research Station (ARS), Office of VP for Research and Graduate Studies, Qatar University, Doha P.O. Box 2713, Qatar
| | - Hareb Al Jabri
- Biotechnology Program, Center for Sustainable Development, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
- Department of Biological and Environmental Sciences, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
| | - Hoda Hosseini
- Biotechnology Program, Center for Sustainable Development, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
| | - Mohammed Trigui
- Laboratory of Environmental Sciences and Sustainable Development (LASED), Sfax Preparatory Engineering Institute, University of Sfax, Sfax 3018, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
| | - Slim Tounsi
- Laboratory of Biopesticides (LBPES), Center of Biotechnology of Sfax, University of Sfax, Sfax 3038, Tunisia
| | - Imen Saadaoui
- Biotechnology Program, Center for Sustainable Development, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
- Department of Biological and Environmental Sciences, College of Art and Sciences, Qatar University, Doha P.O. Box 2713, Qatar
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10
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Ibrahim IM, Fedonenko YP, Sigida EN, Kokoulin MS, Grinev VS, Mokrushin IG, Burygin GL, Zakharevich AM, Shirokov AA, Konnova SA. Structural characterization and physicochemical properties of the exopolysaccharide produced by the moderately halophilic bacterium Chromohalobacter salexigens, strain 3EQS1. Extremophiles 2023; 27:4. [PMID: 36715826 DOI: 10.1007/s00792-023-01289-0] [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: 08/08/2022] [Accepted: 01/15/2023] [Indexed: 01/31/2023]
Abstract
A strain, 3EQS1, was isolated from a salt sample taken from Lake Qarun (Fayoum Province, Egypt). On the basis of physiological, biochemical, and phylogenetic analyses, the strain was classified as Chromohalobacter salexigens. By 72 h of growth at 25 °C, strain 3EQS1 produced large amounts (15.1 g L-1) of exopolysaccharide (EPS) in a liquid mineral medium (initial pH 8.0) containing 10% sucrose and 10% NaCl. The EPS was precipitated from the cell-free culture medium with chilled ethanol and was purified by gel-permeation and anion-exchange chromatography. The molecular mass of the EPS was 0.9 × 106 Da. Chemical analyses, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy showed that the EPS was a linear β-D-(2 → 6)-linked fructan (levan). In aqueous solution, the EPS tended to form supramolecular aggregates with a critical aggregation concentration of 240 µg mL-1. The EPS had high emulsifying activity (E24, %) against kerosene (31.2 ± 0.4%), sunflower oil (76.9 ± 1.3%), and crude oil (98.9 ± 0.8%), and it also had surfactant properties. A 0.1% (w/v) aqueous EPS solution reduced the surface tension of water by 11.9%. The levan of C. salexigens 3EQS1 may be useful in various biotechnological processes.
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Affiliation(s)
- Ibrahim M Ibrahim
- Department of Agricultural Microbiology, Faculty of Agriculture, Fayoum University, Fayoum, 63514, Egypt.,Chernyshevsky Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov, 410012, Russia
| | - Yuliya P Fedonenko
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, 410049, Russia.
| | - Elena N Sigida
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, 410049, Russia
| | - Maxim S Kokoulin
- G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of Russian Academy of Sciences, 159 Prospekt 100 let Vladivostoku, Vladivostok, 690022, Russia
| | - Vyacheslav S Grinev
- Chernyshevsky Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov, 410012, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, 410049, Russia
| | | | - Gennady L Burygin
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, 410049, Russia
| | - Andrey M Zakharevich
- Chernyshevsky Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov, 410012, Russia
| | - Alexander A Shirokov
- Chernyshevsky Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov, 410012, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, 410049, Russia
| | - Svetlana A Konnova
- Chernyshevsky Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov, 410012, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, 13 Prospekt Entuziastov, Saratov, 410049, Russia
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11
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Liang S, Wang SN, Zhou LL, Sun S, Zhang J, Zhuang LL. Combination of Biochar and Functional Bacteria Drives the Ecological Improvement of Saline-Alkali Soil. PLANTS (BASEL, SWITZERLAND) 2023; 12:284. [PMID: 36678996 PMCID: PMC9864812 DOI: 10.3390/plants12020284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The addition of functional bacteria (FB) is low-cost and is widely applied in saline-alkali soil remediation, which may gradually become ineffective due to inter-specific competition with indigenous bacteria. To improve the adaptability of FB, the target FB strains were isolated from local saline-alkali soil, and the combined effects of FB and biochar were explored. The results showed that FB isolated from local soil showed better growth than the purchased strains under high saline-alkali conditions. However, the indigenous community still weakened the function of added FB. Biochar addition provided a specific niche and increased the relative abundance of FB, especially for Proteobacteria and Bacteroidota. As a result, the co-addition of 10% biochar and FB significantly increased the soil available phosphorus (AP) by 74.85% and available nitrogen (AN) by 114.53%. Zea Mays's growth (in terms of height) was enhanced by 87.92% due to the decreased salinity stress and extra nutrients provided.
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Affiliation(s)
- Shuang Liang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
| | - Sheng-Nan Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
| | - Lu-Lu Zhou
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
| | - Shuo Sun
- Baiyangdian Basin Eco-environmental Support Center, Shijiazhuang 050000, China
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Lin-Lan Zhuang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
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12
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Boness HVM, de Sá HC, Dos Santos EKP, Canuto GAB. Sample Preparation in Microbial Metabolomics: Advances and Challenges. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1439:149-183. [PMID: 37843809 DOI: 10.1007/978-3-031-41741-2_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Microbial metabolomics has gained significant interest as it reflects the physiological state of microorganisms. Due to the great variability of biological organisms, in terms of physicochemical characteristics and variable range of concentration of metabolites, the choice of sample preparation methods is a crucial step in the metabolomics workflow and will reflect on the quality and reliability of the results generated. The procedures applied to the preparation of microbial samples will vary according to the type of microorganism studied, the metabolomics approach (untargeted or targeted), and the analytical platform of choice. This chapter aims to provide an overview of the sample preparation workflow for microbial metabolomics, highlighting the pre-analytical factors associated with cultivation, harvesting, metabolic quenching, and extraction. Discussions focus on obtaining intracellular and extracellular metabolites. Finally, we introduced advanced sample preparation methods based on automated systems.
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Affiliation(s)
- Heiter V M Boness
- Department of Analytical Chemistry, Institute of Chemistry, Federal University of Bahia, Salvador, BA, Brazil
| | - Hanna C de Sá
- Department of Analytical Chemistry, Institute of Chemistry, Federal University of Bahia, Salvador, BA, Brazil
| | - Emile K P Dos Santos
- Department of Analytical Chemistry, Institute of Chemistry, Federal University of Bahia, Salvador, BA, Brazil
| | - Gisele A B Canuto
- Department of Analytical Chemistry, Institute of Chemistry, Federal University of Bahia, Salvador, BA, Brazil.
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13
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Wang L, Cui YW, Jian L, Yao JL. Spontaneous granulation of moderately halophilic sludge inoculated with saltern sediments from single granule into multi-granule aggregation. ENVIRONMENTAL RESEARCH 2023; 216:114813. [PMID: 36395863 DOI: 10.1016/j.envres.2022.114813] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 11/02/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
There is very limited research on the application of moderate halophiles for biotreatment of hypersaline wastewater widely generated from some industries. This study demonstrated the development of moderate halophiles inoculated from saltern sediments into aerobic granule sludge (AGS) to treat hypersaline wastewater with a salinity of 100 g/L. The granulation of moderate halophiles can occur without applying the settling velocity selective pressure. The saltern sediment initially aggregated into single small granules and finally developed into 1200 ± 50 μm multiparticle granules. The halophiles affiliated in Halomonas was dominant in the granular bacterial community, with a relative abundance of 94.52%. Halomonas ventosae secreted sulfated polysaccharides. The sulfated polysaccharides content accounted for 63.95 ± 2.10% in the polysaccharides (PS), having an adhesive role in connecting single granules. Multiparticle granules showed the clear stratified structure, with α-D-glucopyranose polysaccharides in the inner bounders and β-D-glucopyranose polysaccharides in the outer. The moderately granular sludge showed the stable chemical oxygen demand (COD) removal efficiency of >90% and the aerobic total inorganic nitrogen (TIN) removal efficiency (equal to ammonia removal) of 70 ± 5.00%. This paper contributes new insight into the formation of moderately halophilic granular sludge and accelerates the application of moderately halophilic granular sludge to treat hypersaline wastewater.
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Affiliation(s)
- Ling Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
| | - You-Wei Cui
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China.
| | - Li Jian
- China Academy of Transportation Sciences, Huixinli Chaoyang District, P.R.C, Beijing, 100029, China
| | - Jia-Lin Yao
- China Academy of Transportation Sciences, Huixinli Chaoyang District, P.R.C, Beijing, 100029, China
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14
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Liu S, Liu X, Shi Y, Zhuang S, Chen Q. RETRACTED: The adaptive mechanism of halophilic Brachybacterium muris in response to salt stress and its mitigation of copper toxicity in hydroponic plants. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 313:120124. [PMID: 36089137 DOI: 10.1016/j.envpol.2022.120124] [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: 06/07/2022] [Revised: 08/27/2022] [Accepted: 09/03/2022] [Indexed: 06/15/2023]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Authors who have indicated that there are significant errors with the scientific data upon which this study is based. Specifically, the authors have subsequently discovered that the 16S rDNA sequencing of Brachybacterium muris may not be reliable because of the limited identification methods from a few years ago. The authors are now repeating their experiments to reconfirm their data. The Authors take full responsibility for these errors and offer their sincere apologies.
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Affiliation(s)
- Siyu Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Xiayu Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Ying Shi
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
| | - Shulin Zhuang
- College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Qihe Chen
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China; Future Food Laboratory, Innovation Center of Yangtze River Delta, Zhejiang University, Jiashan, 310000, China.
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15
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Firoozbakht M, Sepahi AA, Rashedi H, Yazdian F. Investigating the effect of nanoparticle on phenanthrene biodegradation by Labedella gwakjiensis strain KDI. Biodegradation 2022; 33:441-460. [PMID: 35732966 DOI: 10.1007/s10532-022-09991-0] [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: 07/15/2021] [Accepted: 06/06/2022] [Indexed: 11/02/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs), as persistent organic contaminants, are a major source of concern due to their toxic effect on ecosystems and human health. This study attempted to isolate halotolerant PAHs degrading bacteria from saline oil-contaminated soils. Among the isolates, strain KDI with the highest 16S rRNA gene sequence similarity to Labedella gwakjiensis was able to reduce surface tension (ST) from 65.42 to 26.60 mN m-1 and increase the emulsification index to 81.04%, as a result of significant biosurfactant production. Response Surface Methodology (RSM) analysis was applied to optimize the factors, i.e. PAHs concentration and NaCl concentration as well as to determine the effect of these important variables on PAHs biodegradation. The Carbon Quantum Dots. Iron Oxide (CQDs.Fe3O4) nanoparticles were characterized by several popular analytical techniques, after which the effect of CQD.Fe3O4 nanoparticles on biodegradation was examined. PAHs biodegradation rate and efficiency of strain KDI to degrade PHE in the presence of CQD.Fe3O4 nanoparticles was analyzed by GC. According to the results during biodegradation both the concentration of PAHs and the amount of NaCl were effective. The biodegradation rate significantly increased in the presence of CQD.Fe3O4. The highest biodegradation of PHE occurred in the presence of 0.5 g/L of CQD.Fe3O4 which was 63.63% and 81.77% after 48 and 72 h of incubation. To the best of our knowledge, this is the first report on optimization of PAHs concentration and salinity by RSM and nanobioremediation of PHE using a bacterial strain in the presence of CQD.Fe3O4 nanoparticles.
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Affiliation(s)
- Maryam Firoozbakht
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Abbas Akhavan Sepahi
- Department of Microbiology, Faculty of Biological Sciences, Islamic Azad University, North Tehran Branch, Tehran, Iran.
| | - Hamid Rashedi
- Department of Biotechnology, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Fatemeh Yazdian
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran
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16
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Jimoh AA, Ikhimiukor OO, Adeleke R. Prospects in the bioremediation of petroleum hydrocarbon contaminants from hypersaline environments: A review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:35615-35642. [PMID: 35247173 DOI: 10.1007/s11356-022-19299-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Hypersaline environments are underappreciated and are frequently exposed to pollution from petroleum hydrocarbons. Unlike other environs, the high salinity conditions present are a deterrent to various remediation techniques. There is also production of hypersaline waters from oil-polluted ecosystems which contain toxic hydrophobic pollutants that are threat to public health, environmental protection, and sustainability. Currently, innovative advances are being proposed for the remediation of oil-contaminated hypersaline regions. Such advancements include the exploration and stimulation of native microbial communities capable of utilizing and degrading petroleum hydrocarbons. However, prevailing salinity in these environments is unfavourable for the growth of non-halophylic microorganisms, thus limiting effective bioremediation options. An in-depth understanding of the potentials of various remediation technologies of hydrocarbon-polluted hypersaline environments is lacking. Thus, we present an overview of petroleum hydrocarbon pollution in hypersaline ecosystems and discuss the challenges and prospects associated with several technologies that may be employed in remediation of hydrocarbon pollution in the presence of delimiting high salinities. The application of biological remediation technologies including the utilization of halophilic and halotolerant microorganisms is also discussed.
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Affiliation(s)
- Abdullahi Adekilekun Jimoh
- Unit for Environmental Sciences and Management, North-West University (Potchefstroom Campus), Potchefstroom, 2520, South Africa.
- Institute for Microbial Biotechnology and Metagenomics, Department of Biotechnology, University of the Western Cape, Bellville, Cape Town, 7535, South Africa.
| | - Odion Osebhahiemen Ikhimiukor
- Environmental Microbiology and Biotechnology Laboratory, Department of Microbiology, University of Ibadan, Ibadan, Nigeria
| | - Rasheed Adeleke
- Unit for Environmental Sciences and Management, North-West University (Potchefstroom Campus), Potchefstroom, 2520, South Africa
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17
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Zhao J, Wu Q, Tang Y, Zhou J, Guo H. Tannery wastewater treatment: conventional and promising processes, an updated 20-year review. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2022. [DOI: 10.1186/s42825-022-00082-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
AbstractMismanagement of various wastes especially waste water produced by tanning processes has caused serious environmental problems and ultimately impaired human health. Constant efforts have been making to alleviate the pollution of tannery wastewater (TWW), yet terminal treatment still takes dominance. In this review, research on TWW treatment from 2000 to 2021 was summarized, and main methods such as coagulation and flocculation, adsorption, biological treatment, membrane filtration, advanced oxidation process were briefly discussed. More detailed introduction was given to the method of electrochemical treatment since it has excellent performance such as environmental friendliness and high efficiency, hence attracting more and more research attention in recent years. In view of the harsh physi-chemical conditions of TWW, integrated or combined treatment methods are accordingly recommended with better performance and multi-function, however comprehensive studies on optimization of methods combination and cost-effectiveness are needed. The certain issues that the residue Cr in treatment sludge and high salinity in effluent still remain were put forward in this work and potential solutions were provided. Moreover, this review proposed the perspective that realizing multi-function, recycling, and intensification should be the developing direction for future TWW treatment. This review is expected to provide a general guide for researchers who aspire to ameliorate TWW pollution problems and understand various methods utilized in this field.
Graphical abstract
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18
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Zhang X. Selective separation membranes for fractionating organics and salts for industrial wastewater treatment: Design strategies and process assessment. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120052] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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19
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Biomineralization by Extremely Halophilic and Metal-Tolerant Community Members from a Sulfate-Dominated Metal-Rich Environment. Microorganisms 2021; 10:microorganisms10010079. [PMID: 35056528 PMCID: PMC8780871 DOI: 10.3390/microorganisms10010079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 11/17/2022] Open
Abstract
The adaptation to adverse environmental conditions can lead to adapted microbial communities that may be screened for mechanisms involved in halophily and, in this case, metal tolerance. At a former uranium mining and milling site in Seelingstädt, Germany, microbial communities from surface waters and sediment soils were screened for isolates surviving high salt and metal concentrations. The high salt contents consisted mainly of chloride and sulfate, both in soil and riverbed sediment samples, accompanied by high metal loads with presence of cesium and strontium. The community structure was dominated by Chloroflexi, Proteobacteria and Acidobacteriota, while only at the highest contaminations did Firmicutes and Desulfobacterota reach appreciable percentages in the DNA-based community analysis. The extreme conditions providing high stress were mirrored by low numbers of cultivable strains. Thirty-four extremely halotolerant bacteria (23 Bacillus sp. and another 4 Bacillales, 5 Actinobacteria, and 1 Gamma-Proteobacterium) surviving 25 to 100 mM SrCl2, CsCl, and Cs2SO4 were further analyzed. Mineral formation of strontium- or cesium-struvite could be observed, reducing bioavailability and thereby constituting the dominant metal and salt resistance strategy in this environment.
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20
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Effects of Seven-Year Fertilization Reclamation on Bacterial Community in a Coal Mining Subsidence Area in Shanxi, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312504. [PMID: 34886231 PMCID: PMC8656652 DOI: 10.3390/ijerph182312504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/20/2021] [Accepted: 11/24/2021] [Indexed: 12/26/2022]
Abstract
The restoration of soil fertility and microbial communities is the key to the soil reclamation and ecological reconstruction in coal mine subsidence areas. However, the response of soil bacterial communities to reclamation is still not well understood. Here, we studied the bacterial communities in fertilizer-reclaimed soil (CK, without fertilizer; CF, chemical fertilizer; M, manure) in the Lu’an reclamation mining region and compared them with those in adjacent subsidence soil (SU) and farmland soil (FA). We found that the compositions of dominant phyla in the reclaimed soil differed greatly from those in the subsidence soil and farmland soil (p < 0.05). The related sequences of Acidobacteria, Chloroflexi, and Nitrospirae were mainly from the subsided soil, whereas those of Alphaproteobacteria, Planctomycetes, and Deltaproteobacteria were mainly derived from the farmland soil. Fertilization affected the bacterial community composition in the reclaimed soil, and bacteria richness and diversity increased significantly with the accumulation of soil nutrients after 7 years of reclamation (p < 0.05). Moreover, soil properties, especially SOM and pH, were found to play a key role in the restoration of the bacterial community in the reclaimed soil. The results are helpful to the study of soil fertility improvement and ecological restoration in mining areas.
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21
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Valdés H, Saavedra A, Flores M, Vera-Puerto I, Aviña H, Belmonte M. Reverse Osmosis Concentrate: Physicochemical Characteristics, Environmental Impact, and Technologies. MEMBRANES 2021; 11:753. [PMID: 34677518 PMCID: PMC8541667 DOI: 10.3390/membranes11100753] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 11/17/2022]
Abstract
This study's aim is to generate a complete profile of reverse osmosis concentrate (ROC), including physicochemical characteristics, environmental impact, and technologies for ROC treatment, alongside element recovery with potential valorization. A systematic literature review was used to compile and analyze scientific information about ROC, and systematic identification and evaluation of the data/evidence in the articles were conducted using the methodological principles of grounded data theory. The literature analysis revealed that two actions are imperative: (1) countries should impose strict regulations to avoid the contamination of receiving water bodies and (2) desalination plants should apply circular economies. Currently, synergizing conventional and emerging technologies is the most efficient method to mitigate the environmental impact of desalination processes. However, constructed wetlands are an emerging technology that promise to be a viable multi-benefit solution, as they can provide simultaneous treatment of nutrients, metals, and trace organic contaminants at a relatively low cost, and are socially accepted; therefore, they are a sustainable solution.
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Affiliation(s)
- Hugo Valdés
- Centro de Innovación en Ingeniería Aplicada (CIIA), Departamento de Computación e Industrias, Facultad de Ciencias de la Ingeniería, Universidad Católica del Maule (UCM), Av. San Miguel 3605, Talca 3460000, Chile
| | - Aldo Saavedra
- Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Santiago de Chile (USACH), Av. Libertador Bernardo O’Higgins 3363, Estación Central 9160000, Chile
| | - Marcos Flores
- Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad Santo Tomás, Avenida Carlos Schorr 255, Talca 3473620, Chile;
| | - Ismael Vera-Puerto
- Centro de Innovación en Ingeniería Aplicada (CIIA), Departamento de Obras Civiles, Facultad de Ciencias de la Ingeniería, Universidad Católica del Maule, Av. San Miguel 3605, Talca 3460000, Chile;
| | - Hector Aviña
- iiDEA Group, Department of Industrial and Environmental Process Engineering, Engineering Institute, National Autonomous University of Mexico (UNAM), Ciudad de México 04510, Mexico;
| | - Marisol Belmonte
- Laboratorio de Biotecnología, Medio Ambiente e Ingeniería (LABMAI), Facultad de Ingeniería, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Valparaíso 2340000, Chile;
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22
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Weber V, Kamika I, Momba MNB. Comparing the effect of zinc oxide and titanium dioxide nanoparticles on the ability of moderately halophilic bacteria to treat wastewater. Sci Rep 2021; 11:16969. [PMID: 34417503 PMCID: PMC8379202 DOI: 10.1038/s41598-021-96413-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/23/2021] [Indexed: 11/11/2022] Open
Abstract
This study evaluates the ability of moderately halophilic bacterial isolates (Serratia sp., Bacillus sp., Morganella sp., Citrobacter freundii and Lysinibacillus sp.) to treat polluted wastewater in the presence of nZnO and nTiO2 nanoparticles. In this study, bacteria isolates were able to take up nZnO and nTiO2 at concentrations ranging from 1 to 50 mg/L in the presence of higher DO uptake at up to 100% and 99%, respectively, while higher concentrations triggered a significant decrease. Individual halophilic bacteria exhibited a low COD removal efficiency in the presence of both metal oxide nanoparticles concentration ranged between 1 and 10 mg/L. At higher concentrations, they triggered COD release of up to − 60% concentration. Lastly, the test isolates also demonstrated significant nutrient removal efficiency in the following ranges: 23–65% for NO3− and 28–78% for PO43−. This study suggests that moderately halophilic bacteria are good candidates for the bioremediation of highly polluted wastewater containing low metal oxide nanoparticles.
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Affiliation(s)
- Vanessa Weber
- Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Arcadia Campus, Private Bag X680, Pretoria, 0001, South Africa
| | - Ilunga Kamika
- Institute for Nanotechnology and Water Sustainability, School of Science, College of Science, Engineering and Technology, University of South Africa, Florida Campus, Johannesburg, South Africa.
| | - Maggy N B Momba
- Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Arcadia Campus, Private Bag X680, Pretoria, 0001, South Africa.
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23
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Li J, Gao Y, Dong H, Sheng GP. Haloarchaea, excellent candidates for removing pollutants from hypersaline wastewater. Trends Biotechnol 2021; 40:226-239. [PMID: 34284891 DOI: 10.1016/j.tibtech.2021.06.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/23/2021] [Accepted: 06/23/2021] [Indexed: 11/25/2022]
Abstract
Hypersaline wastewater is difficult to treat due to the inhibition of salt stress on microbes' viability and metabolic capabilities. Haloarchaea, native microorganisms that thrive in hypersaline habitats, overcome this key obstacle naturally. This review provides a comprehensive overview of the metabolic versatility of Haloarchaea in hypersaline wastewater treatment, including carbon, nitrogen, phosphorus, sulfur, and heavy metal metabolism. It also analyzes factors affecting pollutant removal and addresses metabolic mechanisms. Additionally, haloarchaea microbial characteristics and strategies to cope with salt stress are highlighted. Finally, the biotechnological potential of biomolecules produced from haloarchaea is investigated. To get better insight into the potential of haloarchaea, a deeper investigation of basic metabolism and more in-depth studies of their genomics and applications in actual wastewater are also necessary.
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Affiliation(s)
- Jin Li
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Yuanyuan Gao
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Huiyu Dong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Guo-Ping Sheng
- Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
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24
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Ren D, Ren SP, Lin Y, Xu J, Wang XL. Stitch and copolymerization of thin-film composite membranes to enhance hydrophilicity and organics resistance for the separation of glycerol-based wastewater. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125446. [PMID: 33930966 DOI: 10.1016/j.jhazmat.2021.125446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/24/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
Many industries produce large amounts of glycerol-based wastewater, which always contains hazardous organic chlorides. Compared with complicated biological treatments or physical adsorption, membrane separation decreases the cost and saves energy. Strong swelling of traditional thin-film composite (TFC) membranes influence the performance in the separation of organic molecules. Here we prepared TFC membranes with an acrylamide-grafted PAN support layer to copolymerize with m-phenylenediamine (MPD) and trimesoyl chloride (TMC). The link of separative layer and support layer was created like a zipper stitching to enhance the stability and resistance for the removal of organic molecules. An aquatic grass-like layer of acrylamide enlarges the surface area and hydrophilicity with superior separation performances (15.8 LMH bar-1 flux, 72.0% rejection of dichloropropanol (DCP) and 64.6% rejection of glycerol (Gl)). The trade-off upper bound was improved to a high level. We also established the simulations of evaporation using Aspen Plus and mathematical models of reverse osmosis to calculate the energy consumption corresponding to the recycle of glycerol-based wastewater. The experimental and theoretical results illustrate the advantages of acrylamide-grafted TFC membranes in the ap-plications to concentrate organic solutes and treat wastewater.
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Affiliation(s)
- Dan Ren
- Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Shu-Ping Ren
- Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Yakai Lin
- Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
| | - Jianhong Xu
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
| | - Xiao-Lin Wang
- Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China.
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Mazioti AA, Vasquez MI, Vyrides I. Comparison of different cultures and culturing conditions for the biological deterioration of organic load from real saline bilge wastewater: microbial diversity insights and ecotoxicity assessment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:36506-36522. [PMID: 33709312 DOI: 10.1007/s11356-021-13153-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
Bilge wastewater is a high strength, typically saline wastewater, originating from operation of ships. In this study, the treatment of real bilge wastewater was tested using pure isolated aerobic strains and mixed cultures (aerobic and anaerobic). The Chemical Oxygen Demand (COD) and ecotoxicity decrease were monitored over time, while the microbial dynamics alterations in mixed cultures were also recorded. The isolated strains Pseudodonghicola xiamenensis, Halomonas alkaliphila and Vibrio antiquaries were shown to significantly biodegrade bilge wastewater. Reasonable COD removal rates were achieved by aerobic mixed cultures (59%, 9 days), while anaerobic mixed cultures showed lower performance (34%, 51 days). The genus Pseudodonghicola was identified as dominant under aerobic conditions both in the mixed cultures and in the control sample (raw wastewater), after exposure to bilge wastewater, demonstrating natural proliferation of the genus and potential contribution to COD reduction. Biodegradation rates were higher when initial organic load was high, while the toxicity of raw wastewater partially decreased after treatment.
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Affiliation(s)
- Aikaterini A Mazioti
- Department of Chemical Engineering, Cyprus University of Technology, 30 Archibishop Kyprianos str, 3036, Limassol, Cyprus
| | - Marlen I Vasquez
- Department of Chemical Engineering, Cyprus University of Technology, 30 Archibishop Kyprianos str, 3036, Limassol, Cyprus
| | - Ioannis Vyrides
- Department of Chemical Engineering, Cyprus University of Technology, 30 Archibishop Kyprianos str, 3036, Limassol, Cyprus.
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Mainka T, Weirathmüller D, Herwig C, Pflügl S. Potential applications of halophilic microorganisms for biological treatment of industrial process brines contaminated with aromatics. J Ind Microbiol Biotechnol 2021; 48:kuab015. [PMID: 33928348 PMCID: PMC9113102 DOI: 10.1093/jimb/kuab015] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/20/2021] [Indexed: 11/13/2022]
Abstract
Saline wastewater contaminated with aromatic compounds can be frequently found in various industrial sectors. Those compounds need to be degraded before reuse of wastewater in other process steps or release to the environment. Halophiles have been reported to efficiently degrade aromatics, but their application to treat industrial wastewater is rare. Halophilic processes for industrial wastewater treatment need to satisfy certain requirements: a continuous process mode, low operational expenditures, suitable reactor systems and a monitoring and control strategy. The aim of this review is to provide an overview of halophilic microorganisms, principles of aromatic biodegradation, and sources of saline wastewater containing aromatics and other contaminants. Finally, process examples for halophilic wastewater treatment and potential process monitoring strategies are discussed. To further illustrate the significant potential of halophiles for saline wastewater treatment and to facilitate development of ready-to-implement processes, future research should focus on scale-up and innovative process monitoring and control strategies.
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Affiliation(s)
- Thomas Mainka
- Institute for Chemical, Environmental and Bioscience
Engineering, TU Wien, Gumpendorfer Straße 1a, 1060
Vienna, Austria
- Competence Center CHASE GmbH,
Altenbergerstraße 69, 4040 Linz, Austria
| | - David Weirathmüller
- Institute for Chemical, Environmental and Bioscience
Engineering, TU Wien, Gumpendorfer Straße 1a, 1060
Vienna, Austria
| | - Christoph Herwig
- Institute for Chemical, Environmental and Bioscience
Engineering, TU Wien, Gumpendorfer Straße 1a, 1060
Vienna, Austria
- Competence Center CHASE GmbH,
Altenbergerstraße 69, 4040 Linz, Austria
| | - Stefan Pflügl
- Institute for Chemical, Environmental and Bioscience
Engineering, TU Wien, Gumpendorfer Straße 1a, 1060
Vienna, Austria
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Extremophilic Fungi and Their Role in Control of Pathogenic Microbes. Fungal Biol 2021. [DOI: 10.1007/978-3-030-60659-6_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Resistance of a Halobacterium salinarum isolate from a solar saltern to cadmium, lead, nickel, zinc, and copper. Antonie Van Leeuwenhoek 2020; 113:1699-1711. [PMID: 32974806 DOI: 10.1007/s10482-020-01475-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 09/16/2020] [Indexed: 10/23/2022]
Abstract
The current study focuses on the tolerance of a strain of Halobacterium salinarum isolated from Sfax solar saltern (Tunisia) towards cadmium (Cd), lead (Pb), nickel (Ni), zinc (Zn), and copper (Cu) by using agar dilution methods in complex and minimal media. The results showed the least inhibitory metals based on Minimum Inhibitory Concentrations (MICs) were lead (MIC = 4.5 mM), cadmium (MIC = 4 mM), and nickel (MIC = 2.5 mM) in complex medium. The MICs of these metals were more inhibitory (MIC < 2 mM) in the other tested media. The archaeal strain revealed a high sensitivity for copper and zinc, with MICs below 0.5 mM for both metals. Growth kinetics in complex and minimal media showed the strain to be more sensitive to the metals in liquid media than in solid media. The growth kinetic assays indicated the presence of selected heavy metals resulted in a lower growth rate and lower total cell mass relative to the control. Despite that cadmium and lead are nonessential and have no nutrient value, they were the most tolerated metals by H. salinarum strain. In addition, pigment intensity in the strain was inhibited by the presence of the heavy metals relative to the control.
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Al Farraj DA, Hadibarata T, Yuniarto A, Alkufeidy RM, Alshammari MK, Syafiuddin A. Exploring the potential of halotolerant bacteria for biodegradation of polycyclic aromatic hydrocarbon. Bioprocess Biosyst Eng 2020; 43:2305-2314. [DOI: 10.1007/s00449-020-02415-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 07/22/2020] [Indexed: 12/27/2022]
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Comparative Study on Different Remediation Strategies Applied in Petroleum-Contaminated Soils. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17051606. [PMID: 32131529 PMCID: PMC7084466 DOI: 10.3390/ijerph17051606] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/16/2020] [Accepted: 02/26/2020] [Indexed: 01/23/2023]
Abstract
Due to the increasing pollution by petroleum hydrocarbons (PHs), it is an important task to develop eco-friendly and highly efficient methods for remediating petroleum-contaminated soils. In this study, bioremediation technology was applied to remediate PHs contaminated soils, and the bacterial community structure and physicochemical characteristics of the soil treated using different bioremediation regimens were analyzed. Compared with the control condition (S0), the PHs removal efficiency of biostimulation (S2) and bioaugmentation (S3) was increased significantly. Combined biostimulation with bioaugmentation (S4) had the highest PHs removal efficiency, up to 60.14 ± 4.12%. Among all the selected remediation strategies (S1-S4, S1: soil moisture content: 25-30%), the bacterial alpha-diversity was higher than in S0. The genera Acinetobacter, Escherichia-Shigella, Bacteroides, Microbacterium, and Parabacteroides were found to greatly contribute to PHs' degradation. In the group S4, the PH-degraders and soil enzyme activity were higher than in the other remediation regimens, and these indices gradually decreased in the mid-to-later periods of all remediation tests. Additionally, the abundance of alkB and nah genes was increased by improving the environmental condition of the microorganism communities. Redundancy analysis (RDA) revealed that the total nitrogen (TN) and total phosphorus (TP) had a positive correlation with total PHs degradation. This study offers insights into the microbial community response to environmental factors during bioremediation, which shows a promoting effect in enhancing the efficiency of PHs remediation.
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Biotreatment of high-salinity wastewater: current methods and future directions. World J Microbiol Biotechnol 2020; 36:37. [DOI: 10.1007/s11274-020-02815-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 02/20/2020] [Indexed: 12/16/2022]
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Structure Elucidation and Biochemical Characterization of Environmentally Relevant Novel Extradiol Dioxygenases Discovered by a Functional Metagenomics Approach. mSystems 2019; 4:4/6/e00316-19. [PMID: 31771973 PMCID: PMC6880040 DOI: 10.1128/msystems.00316-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The release of synthetic chemical pollutants in the environment is posing serious health risks. Enzymes, including oxygenases, play a crucial role in xenobiotic degradation. In the present study, we employed a functional metagenomics approach to overcome the limitation of cultivability of microbes under standard laboratory conditions in order to isolate novel dioxygenases capable of degrading recalcitrant pollutants. Fosmid clones possessing dioxygenase activity were further sequenced, and their genes were identified using bioinformatics tools. Two positive fosmid clones, SD3 and RW1, suggested the presence of 2,3-dihydroxybiphenyl 1,2-dioxygenase (BphC-SD3) and catechol 2,3-dioxygenase (C23O-RW1), respectively. Recombinant versions of these enzymes were purified to examine their pollutant-degrading abilities. The crystal structure of BphC-SD3 was determined at 2.6-Å resolution, revealing a two-domain architecture, i.e., N-terminal and C-terminal domains, with the sequential arrangement of βαβββ in each domain, characteristic of Fe-dependent class II type I extradiol dioxygenases. The structure also reveals the presence of conserved amino acids lining the catalytic pocket and Fe3+ metal ion in the large funnel-shaped active site in the C-terminal domain. Further studies suggest that Fe3+ bound in the BphC-SD3 active site probably imparts aerobic stability. We further demonstrate the potential application of BphC-SD3 in biosensing of catecholic compounds. The halotolerant and oxygen-resistant properties of these enzymes reported in this study make them potential candidates for bioremediation and biosensing applications.IMPORTANCE The disposal and degradation of xenobiotic compounds have been serious issues due to their recalcitrant properties. Microbial oxygenases are the fundamental enzymes involved in biodegradation that oxidize the substrate by transferring oxygen from molecular oxygen. Among oxygenases, catechol dioxygenases are more versatile in biodegradation and are well studied among the bacterial world. The use of catechol dioxygenases in the field is currently not practical due to their aerobically unstable nature. The significance of our research lies in the discovery of aerobically stable and halotolerant catechol dioxygenases that are efficient in degrading the targeted environmental pollutants and, hence, could be used as cost-effective alternatives for the treatment of hypersaline industrial effluents. Moreover, the structural determination of novel catechol dioxygenases would greatly enhance our knowledge of the function of these enzymes and facilitate directed evolution to further enhance or engineer desired properties.
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Macêdo WV, Sakamoto IK, Azevedo EB, Damianovic MHRZ. The effect of cations (Na +, Mg 2+, and Ca 2+) on the activity and structure of nitrifying and denitrifying bacterial communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 679:279-287. [PMID: 31082601 DOI: 10.1016/j.scitotenv.2019.04.397] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 06/09/2023]
Abstract
Wastewaters generated in regions with water scarcity usually have high alkalinity, hardness, and elevated osmotic pressure (OP). Those characteristics should be considered when using biological systems for wastewater treatment along with the salinity heterogeneity. The interaction of different salts in mixed electrolyte solutions may cause inhibition, antagonism, synergism, and stimulation effects on microbial communities. Little is known about those effects on microbial activity and community structure of nitrifying and denitrifying bacteria. In this work, factorial design was used to evaluate the effects of NaCl, MgCl2 and CaCl2 on nitrifying and denitrifying communities. Antagonistic relationships between all salts were observed and they had greater magnitude on the nitrifying community. Stimulus and synernism were more evident on the nitrifying and denitrifying experiments, respectively. For this reason, the highest nitrification and denitrification specific rates were 1.1 × 10-1 mgN-NH4+ gSSV-1 min-1 for condition 01 and 6.5 × 10-2 mgN-NO3- gSSV-1 min-1 for control condition, respectively. The toxicity of the salts followed the order of NaCl > MgCl2 > CaCl2 and the antagonism between MgCl2 and NaCl was the most significant. PCR/DGGE analyses showed that Mg2+ may be the element that expresses the least influence in the differentiation of microbial structure even though it significantly affects the activity of the autotrophic microorganisms. The same behavior was observed for Ca2+ on denitrifying microorganism. In addition, microbial diversity and richness was not negatively affected by different salinities. Genetic sequencing suggested that the genus Aeromonas, Alishewanella, Azospirillum, Pseudoalteromonas, and Thioalkalivibrio were outstanding on ammonium and nitrate removal under saline conditions. The specific toxicity of each salt and the interactions among them are the major effects on microbial activity in biological wastewater treatments rather than the osmotic pressure caused by the final salinity.
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Affiliation(s)
- Williane Vieira Macêdo
- Biological Processes Laboratory (LPB), University of São Paulo (USP), 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil.
| | - Isabel K Sakamoto
- Biological Processes Laboratory (LPB), University of São Paulo (USP), 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
| | - Eduardo Bessa Azevedo
- Environmental Technology Development Laboratory (LTDAmb), University of São Paulo (USP), 400 Trab. São Carlense Avenue, 13563-120 São Carlos, SP, Brazil
| | - Marcia Helena R Z Damianovic
- Biological Processes Laboratory (LPB), University of São Paulo (USP), 1100 João Dagnone Avenue, 13563-120 São Carlos, SP, Brazil
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Jalali J, Gaudin P, Capiaux H, Ammar E, Lebeau T. Fate and transport of metal trace elements from phosphogypsum piles in Tunisia and their impact on soil bacteria and wild plants. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 174:12-25. [PMID: 30802673 DOI: 10.1016/j.ecoenv.2019.02.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
The phosphate industry in Tunisia generates large amounts of phosphogypsum (PG) with more than 107 t per year. Environmental impact of this solid waste was studied. Cd, Ce, La, Nd, Sr and Y were analyzed from soils near PG stockpiles (Sfax and M'dhilla) and sediments from marine discharge (Gabes). Their impacts on the bacterial community structure and wild plants were investigated. Metal trace elements (MTE) concentrations (in mg Kg-1 DM) were much higher in contaminated soil than in the control (at 12 km from PG stockpiles). Highest concentrations were recorded in top soil and decreased with depth. A low bacterial diversity was shown (impacted by plants more than by MTE). The MTE concentrations in aerial parts (AP) and roots varied according to the plant species and were higher in contaminated sites. Sr, La and Cd in the AP ranged 33.10-657.56, 2.22-11.05 and 0.21-14.20 mg Kg-1 DM respectively. Plants exhibiting the maximal metal concentrations in AP (in mg Kg-1 DM) were the following: Zygophylum album for Sr (657.56) >Zygophylum album for Cd (14.20) >Zygophylum album (11.05) for La >Conyza canadensis (1.11) for Ce >Conyza canadensis (0.75) for Nd >Arthrocemum inducum (0.72) for Y. Kochia indica showed the highest bioconcentration factor (1.60) for Cd, while Zygophylum album exhibited the highest translocation factor (6.12) for La. Zygophylum album would be the most suitable candidate for MTE phytoextraction. CAPSULE: Phosphogypsum contaminates soils near stockpiles with metal trace elements including rare earth element and selects wild plants able to be used for phytostabilization and phytomining.
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Affiliation(s)
- Jihen Jalali
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France; Research Unit Coastal and Urban Environments, University of Sfax, National Engineering, School of Sfax, BP 1173, 3038 Sfax, Tunisia
| | - Pierre Gaudin
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France
| | - Hervé Capiaux
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France; Platform for molecular analysis of biodiversity-environnement, IUT Génie Biologique, 85035 La Roche sur Yon, France
| | - Emna Ammar
- Research Unit Coastal and Urban Environments, University of Sfax, National Engineering, School of Sfax, BP 1173, 3038 Sfax, Tunisia
| | - Thierry Lebeau
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322 Nantes Cedex 3, France.
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Amini B, Otadi M, Partovinia A. Statistical modeling and optimization of Toluidine Red biodegradation in a synthetic wastewater using Halomonas strain Gb. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2019; 17:319-330. [PMID: 31297214 PMCID: PMC6582210 DOI: 10.1007/s40201-019-00350-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 02/06/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Synthetic dye wastewater is a group of environmental pollutants that are widely used in some industries like textile, printing, dyeing and etc. Traditional treatment methods for wastewaters containing synthetic dyes are considered as expensive and time consuming approaches due to the chemical stability of these pollutants. Therefore, in recent years, biodegradation by means of capable microorganisms has been considered as an effective way to remove these pollutants. Hence, the present study has aimed at examining the decolorization of Toluidine Red (C.I. no.12120), which is an oil soluble azo dye, as the sole sources of carbon and energy from a synthetic dye wastewater by the halophilic Halomonas strain Gb bacterium. In order to model, optimize, and investigate the individual factors affecting the biodegradation capacity of this dye by Halomonas strain Gb, for the first time response surface methodology (RSM) and central composite design (CCD) were applied. METHODS In this research, statistical modeling and optimization were performed by Design Expert software version 10 and the degradation capacity was considered by carrying out 30 tests using RSM method. For this purpose, the effect of 4 variables included dye concentration (10-30 ppm), salt concentration (2-10%), pH (5.5-9.5), and temperature (20-40) at different times of 2nd, 4th, and 10th days have been studied. Then, a second-order function was presented for the amount of dye removal in terms of the four selected variables, based on statistical modeling. RESULTS According to the obtained results and analysis of variance, all main variables were found to be significantly effective on the biodegradation capacity. With regard to the results, the highest amount of biodegradation between different days was 81% and observed at the 4th day, while the optimum conditions for the maximum biodegradation of this time has been determined at pH of 6.5, temperature of 35 °C, and salt and dye concentrations were equivalent to 4% and 25 ppm, respectively. There is 11% relative error between the experimental and predicted results in the selected experiments, which confirms the reliability of the obtained correlation for calculating the decolorization capacity. CONCLUSION In accordance with the results, the proposed model can provide a good prediction of the effect of different conditions on the biodegradation of Toluidine Red, and the optimization results in this study have been consistent with the previous studies conducted with the IP8 and D2 strains by the OFAT method. Moreover, the proposed model may help in better understanding the impact of main effects and interaction between variables on the dye removal. Overall, the results indicated that the halophilic bacterium used in dye removal can be more effective in high-salinity environments.
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Affiliation(s)
- Baharnaz Amini
- Department of Chemical Engineering, Faculty of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Maryam Otadi
- Department of Chemical Engineering, Faculty of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Ali Partovinia
- Faculty of New Technologies Engineering, Zirab Campus, Shahid Beheshti University, Tehran, Iran
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Xu X, Liu W, Wang W, Tian S, Jiang P, Qi Q, Li F, Li H, Wang Q, Li H, Yu H. Potential biodegradation of phenanthrene by isolated halotolerant bacterial strains from petroleum oil polluted soil in Yellow River Delta. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 664:1030-1038. [PMID: 30901777 DOI: 10.1016/j.scitotenv.2019.02.080] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 02/05/2019] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
The Yellow River Delta (YRD), being close to Shengli Oilfield, is at high risk for petroleum oil pollution. The aim of this study was to isolate halotolerant phenanthrene (PHE) degrading bacteria for dealing with this contaminates in salinity environment. Two bacterial strains assigned as FM6-1 and FM8-1 were successfully screened from oil contaminated soil in the YRD. Morphological and molecular analysis suggested that strains FM6-1 and FM8-1 were belonging to Delftia sp. and Achromobacter sp., respectively. Bacterial growth of both strains was not dependent on NaCl, however, grew well under extensive NaCl concentration. The optimum NaCl concentration for bacterial production of strain FM8-1 was 4% (m/v), whereas for strain FM6-1, growth was not affected within 2.5% NaCl. Both strains could use the tested aromatic hydrocarbons (naphthalene, phenanthrene, fluoranthene and pyrene) and aliphatic hydrocarbons (C12, C16, C20 and C32) as sole carbon source. The optimized biodegradation conditions for strain FM6-1 were pH 7, 28 °C and 2% NaCl, for strain FM8-1 were pH 8, 28 °C and 2.5% NaCl. The highest biodegradation rate of strains FM6-1 and FM8-1 was found at 150 mg/L PHE and 200 mg/L, respectively. In addition, strainsFM8-1 showed a superior biodegradation ability to strain FM6-1 at each optimized condition. The PHE biodegradation process by both strains well fitted to first-order kinetic models and the k1 values were calculated to be 0.1974 and 0.1070 per day. Strain FM6-1 metabolized PHE via a "phthalic acid" route, while strain FM8-1 metabolized PHE through the "naphthalene" route. This project not only obtained two halotolerant petroleum hydrocarbon degraders but also provided a promising remediation approach for solving oil pollutants in salinity environments.
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Affiliation(s)
- Xingjian Xu
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China.
| | - Wenming Liu
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China
| | - Wei Wang
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China
| | - Shuhua Tian
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China
| | - Pan Jiang
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China
| | - Qige Qi
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China
| | - Fengjiao Li
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, China
| | - Haiyan Li
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Changchun University of Science and Technology, Changchun 130022, China
| | - Quanying Wang
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Huai Li
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Hongwen Yu
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Changchun University of Science and Technology, Changchun 130022, China
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Complete Genome Sequence of Halomonas olivaria, a Moderately Halophilic Bacterium Isolated from Olive Processing Effluents, Obtained by Nanopore Sequencing. Microbiol Resour Announc 2019; 8:8/18/e00144-19. [PMID: 31048393 PMCID: PMC6498226 DOI: 10.1128/mra.00144-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Here, we report the complete genome sequence of Halomonas olivaria strain TYRC17, a moderately halophilic, Gram-negative bacterium that was isolated from olive processing effluents. The 5-Mbp genome consists of 7,375 protein-coding sequences, including a variety of genes involved in tyrosol metabolism, nitrate respiration, and the production of polysaccharides. Here, we report the complete genome sequence of Halomonas olivaria strain TYRC17, a moderately halophilic, Gram-negative bacterium that was isolated from olive processing effluents. The 5-Mbp genome consists of 7,375 protein-coding sequences, including a variety of genes involved in tyrosol metabolism, nitrate respiration, and the production of polysaccharides.
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Li Z, Hu Y, Liu C, Shen J, Wu J, Li H, Wang K, Zuo J. Performance and microbial community of an expanded granular sludge bed reactor in the treatment of cephalosporin wastewater. BIORESOURCE TECHNOLOGY 2019; 275:94-100. [PMID: 30579106 DOI: 10.1016/j.biortech.2018.12.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/25/2018] [Accepted: 12/01/2018] [Indexed: 05/06/2023]
Abstract
In this study, the anaerobic treatment and microbial characteristics of high-concentration cephalosporin wastewater were studied. A pilot-scale expanded granular sludge bed (EGSB) reactor was designed to treat cephalosporin wastewater, whose diameter, height and effective volume were 0.5 m, 4.9 m, 0.92 m3, respectively. With mixed high-concentration cephalosporin wastewater and municipal wastewater as a substrate, the anaerobic reactor was started and operated 414 days. An average COD removal efficiency of 72% was achieved at an organic loading rate (OLR) of 9.96 kg COD/(m3·d), with a hydraulic retention time (HRT) of 25 h. The average methane content reached 82%. Methanobacterium and Methanomassiliicoccus were predominant archaea in the granular sludge for each of the organic loading rates, and the predominant methane-producing pathway was hydrogenotroph and methylotroph. Those results demonstrated that the EGSB reactor could treat high-concentration cephalosporin wastewater with a unique methane-producing pathway.
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Affiliation(s)
- Zhonghua Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Yuying Hu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China; School of Civil Engineering and Architecture, East China Jiao Tong University, Nanchang 330013, PR China
| | - Chuanyang Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jian Shen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
| | - Huaizhi Li
- Laboratory of Reactions and Process Engineering, Université de Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jiane Zuo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
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Corsino SF, Capodici M, Di Pippo F, Tandoi V, Torregrossa M. Comparison between kinetics of autochthonous marine bacteria in activated sludge and granular sludge systems at different salinity and SRTs. WATER RESEARCH 2019; 148:425-437. [PMID: 30399557 DOI: 10.1016/j.watres.2018.10.086] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/18/2018] [Accepted: 10/26/2018] [Indexed: 05/12/2023]
Abstract
Biological nutrient removal performances and kinetics of autochthonous marine biomass in forms of activated sludge and aerobic granular sludge were investigated under different salinity and sludge retention time (SRT). Both the biomasses, cultivated from a fish-canning wastewater, were subjected to stepwise increases in salinity (+2 gNaCl L-1), from 30 gNaCl L-1 up to 50 gNaCl L-1 with the aim to evaluate the maximum potential in withstanding salinity by the autochthonous marine biomass. Microbial marine species belonging to the genus of Cryomorphaceae and of Rhodobacteraceae were found dominant in both the systems at the maximum salinity tested (50 gNaCl L-1). The organic carbon was removed with a yield of approximately 98%, irrespective of the salinity. Similarly, nitrogen removal occurred via nitritation-denitritation and was not affected by salinity. The ammonium utilization rate and the nitrite utilization rate were approximately of 3.60 mgNH4-N gVSS-1h-1 and 10.0 mgNO2-N gVSS-1h-1, respectively, indicating a high activity of nitrifying and denitrifying bacteria. The granulation process did not provide significant improvements in the nutrients removal process likely due to the stepwise salinity increase strategy. Biomass activity and performances resulted affected by long SRT (27 days) due to salt accumulation within the activated sludge flocs and granules. In contrast, a lower SRT (14 days) favoured the discharge of the granules and flocs with higher inert content, thereby enhancing the biomass renewing. The obtained results demonstrated that the use of autochthonous-halophilic bacteria represents a valuable solution for the treatment of high-strength carbon and nitrogen saline wastewater in a wide range of salinity. Besides, the stepwise increase in salinity and the operation at low SRT enabled high metabolic activity and to avoid excessive accumulation of salt within the biomass aggregates, limiting their physical destructuration due to the increase in loosely-bound exopolymers.
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Affiliation(s)
- Santo Fabio Corsino
- Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze Ed. 8, 90128, Palermo, Italy.
| | - Marco Capodici
- Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze Ed. 8, 90128, Palermo, Italy
| | - Francesca Di Pippo
- IRSA-CNR Water Research Institute, National Research Council, Via Salaria km 29.300, CP10 00015, Monterotondo, Rome, Italy
| | - Valter Tandoi
- IRSA-CNR Water Research Institute, National Research Council, Via Salaria km 29.300, CP10 00015, Monterotondo, Rome, Italy
| | - Michele Torregrossa
- Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Università di Palermo, Viale delle Scienze Ed. 8, 90128, Palermo, Italy
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Krzmarzick MJ, Taylor DK, Fu X, McCutchan AL. Diversity and Niche of Archaea in Bioremediation. ARCHAEA (VANCOUVER, B.C.) 2018; 2018:3194108. [PMID: 30254509 PMCID: PMC6140281 DOI: 10.1155/2018/3194108] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 08/01/2018] [Indexed: 12/03/2022]
Abstract
Bioremediation is the use of microorganisms for the degradation or removal of contaminants. Most bioremediation research has focused on processes performed by the domain Bacteria; however, Archaea are known to play important roles in many situations. In extreme conditions, such as halophilic or acidophilic environments, Archaea are well suited for bioremediation. In other conditions, Archaea collaboratively work alongside Bacteria during biodegradation. In this review, the various roles that Archaea have in bioremediation is covered, including halophilic hydrocarbon degradation, acidophilic hydrocarbon degradation, hydrocarbon degradation in nonextreme environments such as soils and oceans, metal remediation, acid mine drainage, and dehalogenation. Research needs are addressed in these areas. Beyond bioremediation, these processes are important for wastewater treatment (particularly industrial wastewater treatment) and help in the understanding of the natural microbial ecology of several Archaea genera.
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Affiliation(s)
- Mark James Krzmarzick
- School of Civil and Environmental Engineering, College of Engineering, Architecture, and Technology, Oklahoma State University, Stillwater, OK 74078, USA
| | - David Kyle Taylor
- School of Civil and Environmental Engineering, College of Engineering, Architecture, and Technology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Xiang Fu
- School of Civil and Environmental Engineering, College of Engineering, Architecture, and Technology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Aubrey Lynn McCutchan
- School of Civil and Environmental Engineering, College of Engineering, Architecture, and Technology, Oklahoma State University, Stillwater, OK 74078, USA
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41
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Affiliation(s)
- Xu Zhang
- MOE Lab of Bioinformatics; School of Life Sciences; Tsinghua University; Beijing 100084 China
- Center for Synthetic and Systems Biology; Tsinghua University; Beijing 100084 China
| | - Yina Lin
- MOE Lab of Bioinformatics; School of Life Sciences; Tsinghua University; Beijing 100084 China
- Center for Synthetic and Systems Biology; Tsinghua University; Beijing 100084 China
- Tsinghua-Peking Center for Life Sciences; Tsinghua University; Beijing 100084 China
| | - Guo-Qiang Chen
- MOE Lab of Bioinformatics; School of Life Sciences; Tsinghua University; Beijing 100084 China
- Center for Synthetic and Systems Biology; Tsinghua University; Beijing 100084 China
- Tsinghua-Peking Center for Life Sciences; Tsinghua University; Beijing 100084 China
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Rezaei Somee M, Shavandi M, Dastgheib SMM, Amoozegar MA. Bioremediation of oil-based drill cuttings by a halophilic consortium isolated from oil-contaminated saline soil. 3 Biotech 2018; 8:229. [PMID: 29719771 PMCID: PMC5924431 DOI: 10.1007/s13205-018-1261-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 04/24/2018] [Indexed: 10/17/2022] Open
Abstract
Oil-based drill cuttings are hazardous wastes containing complex hydrocarbons, heavy metals, and brine. Their remediation is a crucial step before release to the environment. In this work, we enriched a halophilic consortium, from oil-polluted saline soil, which is capable of degrading diesel as the main pollutant of oil-based drill cuttings. The degradation ability of the consortium was evaluated in microcosms using two different diluting agents (fine sand and biologically active soil). During the bioremediation process, the bacterial community dynamics of the microcosms was surveyed using PCR amplification of a fragment of 16S rRNA gene followed by denaturing gradient gel electrophoresis (DGGE). The diesel degradation rates were monitored by total petroleum hydrocarbon (TPH) measurement and the total count of heterotrophic and diesel-degrading bacteria. After 3 months, the microcosm containing fine sand and drill cuttings with the ratio of 1:1 (initial TPH of 36,000 mg/kg) showed the highest TPH removal (40%) and its dominant bacterial isolates belonged to the genera Dietzia, Arthrobacter, and Halomonas. DGGE results also confirmed the role of these genera in drill cuttings remediation. DGGE analysis of the bacterial diversity showed that Propionibacterium, Salinimicrobium, Marinobacter, and Dietzia are dominant in active soil microcosm; whereas Bacillus, Salinibacillus, and Marinobacter are abundant in sand microcosm. Our results suggest that the bioaugmentation strategy would be more successful if the diluting agent does not contain a complex microbial community.
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Affiliation(s)
- Maryam Rezaei Somee
- Extremophiles Laboratory, Department of Microbiology, School of Biology, College of Science, University of Tehran, P. O. Box 14155-6455, Tehran, Iran
| | - Mahmoud Shavandi
- Biotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran
| | | | - Mohammad Ali Amoozegar
- Extremophiles Laboratory, Department of Microbiology, School of Biology, College of Science, University of Tehran, P. O. Box 14155-6455, Tehran, Iran
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New Findings on Aromatic Compounds’ Degradation and Their Metabolic Pathways, the Biosurfactant Production and Motility of the Halophilic Bacterium Halomonas sp. KHS3. Curr Microbiol 2018; 75:1108-1118. [DOI: 10.1007/s00284-018-1497-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 04/19/2018] [Indexed: 11/26/2022]
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Guo N, Wang Y, Tong T, Wang S. The fate of antibiotic resistance genes and their potential hosts during bio-electrochemical treatment of high-salinity pharmaceutical wastewater. WATER RESEARCH 2018; 133:79-86. [PMID: 29367050 DOI: 10.1016/j.watres.2018.01.020] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/23/2017] [Accepted: 01/08/2018] [Indexed: 05/18/2023]
Abstract
Pharmaceutical wastewaters containing antibiotics and high salinity can damage traditional biological treatment and result in the proliferation of antibiotic resistance genes (ARGs). Bioelectrochemical system (BES) is a promising approach for treating pharmaceutical wastewater. However, the fate of ARGs in BES and their correlations with microbial communities and horizontal genes transfer are unknown. In this study, we investigated the response of ARGs to bio-electrochemical treatment of chloramphenicol wastewater and their potential hosts under different salinities. Three ARGs encoding efflux pump (cmlA, floR and tetC), one class 1 integron integrase encoding gene (intI1), and sul1 gene (associate with intI1) were analyzed. Correlation analysis between microbial community and ARGs revealed that the abundances of potential hosts of ARGs were strongly affected by salinity, which further determined the alteration in ARGs abundances under different salinities. There were no significant correlations between ARGs and intI1, indicating that horizontal gene transfer was not related to the important changes in ARGs. Moreover, the chloramphenicol removal efficiency was enhanced under a moderate salinity, attributed to the altered microbial community driven by salinity. Therefore, microbial community shift is the major factor for the changes of ARGs and chloramphenicol removal efficiency in BES under different salinities. This study provides new insights on the mechanisms underlying the alteration of ARGs in BES treating high-salinity pharmaceutical wastewater.
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Affiliation(s)
- Ning Guo
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Yunkun Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
| | - Tiezheng Tong
- Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO 80523, United States
| | - Shuguang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
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Ou D, Li H, Li W, Wu X, Wang YQ, Liu YD. Salt-tolerance aerobic granular sludge: Formation and microbial community characteristics. BIORESOURCE TECHNOLOGY 2018; 249:132-138. [PMID: 29040846 DOI: 10.1016/j.biortech.2017.07.154] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/24/2017] [Accepted: 07/26/2017] [Indexed: 06/07/2023]
Abstract
The salt-tolerance aerobic granular sludge (SAGS) dominated by moderately halophilic bacteria was successfully cultured in a 9% (w/v) salty, lab-scale sequence batch reactor (SBR) system. Influence of high salinity (0-9% w/v NaCl) on the formation, performance and microbial succession of the SAGS were explored. Crystal nucleus hypothesis, selection pressure hypothesis and compressed double electric layers hypothesis were used to discuss the formation mechanism of SAGS. Notably, salinity could be seen as a kind of selection pressure contributed to the formation of SAGS, while salinity also declined the performance of SAGS system. High throughput 16S rRNA gene analysis showed that the salinity had great influence on the species succession and community structure of SAGS. Moreover, Salinicola and Halomonas were dominant at 9% salt concentration, therefore moderate halophiles were identified as functional groups for the tolerance of hypersaline stress.
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Affiliation(s)
- Dong Ou
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Hui Li
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Wei Li
- Department of Environmental Engineering, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, PR China
| | - Xiao Wu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Yi-Qiao Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Yong-di Liu
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, PR China.
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The molecular mechanism and post-transcriptional regulation characteristic of Tetragenococcus halophilus acclimation to osmotic stress revealed by quantitative proteomics. J Proteomics 2017; 168:1-14. [DOI: 10.1016/j.jprot.2017.08.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 07/31/2017] [Accepted: 08/18/2017] [Indexed: 12/26/2022]
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Extracellular Microbial Metabolomics: The State of the Art. Metabolites 2017; 7:metabo7030043. [PMID: 28829385 PMCID: PMC5618328 DOI: 10.3390/metabo7030043] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 02/04/2023] Open
Abstract
Microorganisms produce and secrete many primary and secondary metabolites to the surrounding environment during their growth. Therefore, extracellular metabolites provide important information about the changes in microbial metabolism due to different environmental cues. The determination of these metabolites is also comparatively easier than the extraction and analysis of intracellular metabolites as there is no need for cell rupture. Many analytical methods are already available and have been used for the analysis of extracellular metabolites from microorganisms over the last two decades. Here, we review the applications and benefits of extracellular metabolite analysis. We also discuss different sample preparation protocols available in the literature for both types (e.g., metabolites in solution and in gas) of extracellular microbial metabolites. Lastly, we evaluate the authenticity of using extracellular metabolomics data in the metabolic modelling of different industrially important microorganisms.
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Optimization of EPS Production and Characterization by a Halophilic Bacterium, Kocuria rosea ZJUQH from Chaka Salt Lake with Response Surface Methodology. Molecules 2017; 22:molecules22050814. [PMID: 28509876 PMCID: PMC6153930 DOI: 10.3390/molecules22050814] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 05/11/2017] [Accepted: 05/11/2017] [Indexed: 11/17/2022] Open
Abstract
With the rising awareness of microbial exopolysaccharides (EPSs) application in various fields, halophilic microorganisms which produce EPSs have received broad attention. A newly identified Kocuria rosea ZJUQH CCTCC M2016754 was determined to be a moderate halobacterium on account of its successful adaption to the environment containing 10% NaCl. The optimal combination of fermentation medium compositions on EPS production was studied. In this work, a fractional factorial design was adopted to investigate the significant factors that affected EPS production. The factors of KCl and MgSO4 were found to have a profound impact on EPS production. We utilized central composite design and response surface methodology to derive a statistical model for optimizing the submerged culture medium composition. Judging from these experimental results, the optimum culture medium for producing EPSs was composed of 0.50% casein hydrolysate, 1.00% sodium citrate, 0.30% yeast extract, 0.50% KCl, 0.50% peptone, and 5.80% MgSO4 (initial pH 7.0). The maximal EPS was 48.01 g/L, which is close to the predicted value (50.39 g/L). In the validation experiment, the highest concentration of 70.64 g/L EPSs was obtained after 120 h under the optimized culture medium in a 5-L bioreactor. EPS from this bacterium was also characterized by differential scanning calorimetry (DSC) and Fourier transform infrared analysis (FT-IR). The findings in this study imply that Kocuria rosea ZJUQH has great potential to be exploited as a source of EPSs utilized in food, the pharmaceutical and agriculture industry, and in the biotreatment of hypersaline environments.
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Ahmadi M, Jorfi S, Kujlu R, Ghafari S, Darvishi Cheshmeh Soltani R, Jaafarzadeh Haghighifard N. A novel salt-tolerant bacterial consortium for biodegradation of saline and recalcitrant petrochemical wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 191:198-208. [PMID: 28104552 DOI: 10.1016/j.jenvman.2017.01.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Revised: 01/02/2017] [Accepted: 01/05/2017] [Indexed: 06/06/2023]
Abstract
Treatment of a saline petrochemical wastewater with BOD5/COD ratio of less than 0.1 was investigated using a consortium consisted of three isolated salt-tolerant bacteria namely, Kocuria turfanesis, Halomonas alkaliphila and Pseudomonas balearica. Selected bacteria were isolated from petrochemical wastewater containing mineral salt mediums of 3% salinity. A lab-scale activated sludge bioreactor was used for startup in batch mode operation and after obtaining the MLSS concentration of about 3000 mg/L, the operation was changed to continuous flow mode to determine the biokinetic coefficients under different organic loading rates of 0.33-1.21 kg CODm-3 d-1. The COD removal efficiency of 78.7%-61.5% was observed for treatment of real saline wastewater with a decreasing trend along with increasing the organic loading rate. In addition, results of kinetic investigation demonstrated that the yield(Y), endogenous decay coefficient (kd), maximum reaction rate (Kmax), maximum specific growth rate (μmax) and saturation constant (Ks) were 0.54 mg VSS mg COD-1, 0.014 day-1, 1.23 day-1, 0.66 day-1, and 1315 mg L-1, respectively.
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Affiliation(s)
- Mehdi Ahmadi
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Sahand Jorfi
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Raheleh Kujlu
- School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Shokouh Ghafari
- Health Research Institute, Infectious and Tropical Disease Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Virology Department, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | | | - Nematollah Jaafarzadeh Haghighifard
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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50
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Goyal A, Sharma P. A model on the biological treatment of saline wastewater. INT J BIOMATH 2017. [DOI: 10.1142/s1793524517500218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Water scarcity is not a new issue, neither is water pollution. While 70% of the earth’s surface is covered with water, only 3% of it is available as fresh water. Moreover the pollution of water resources has dramatically increased the problem of water scarcity over the last century. Bioremediation presents a cheap and effective solution of this problem. In particular, halophiles have been found to be effective in hypersaline wastewater treatment. Therefore, in this paper, we propose a nonlinear mathematical model to study the removal of a pollutant using halophiles in the hypersaline environment. The analysis of the model is being carried out using stability theory of differential equations. The results indicate that halophiles not only help in removing the organic pollutant, but also help in conversion of saline water into fresh water. The numerical simulations along with sensitivity analysis are performed to support the analytical results.
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Affiliation(s)
- Ashish Goyal
- School of Mathematics and Statistics, The University of New South Wales, Sydney NSW 2052, Australia
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