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Joulak I, Concórdio-Reis P, Torres CAV, Sevrin C, Grandfils C, Attia H, Freitas F, Reis MAM, Azabou S. Sustainable use of agro-industrial wastes as potential feedstocks for exopolysaccharide production by selected Halomonas strains. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:22043-22055. [PMID: 34773587 DOI: 10.1007/s11356-021-17207-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Large quantities of waste biomass are generated annually worldwide by many industries and are vastly underutilized. However, these wastes contain sugars and other dissolved organic matter and therefore can be exploited to produce microbial biopolymers. In this study, four selected Halomonas strains, namely, Halomonas caseinilytica K1, Halomonas elongata K4, Halomonas smyrnensis S3, and Halomonas halophila S4, were investigated for the production of exopolysaccharides (EPS) using low-cost agro-industrial wastes as the sole carbon source: cheese whey, grape pomace, and glycerol. Interestingly, both yield and monosaccharide composition of EPS were affected by the carbon source. Glucose, mannose, galactose, and rhamnose were the predominant monomers, but their relative molar ratio was different. Similarly, the average molecular weight of the synthesized EPS was affected, ranging from 54.5 to 4480 kDa. The highest EPS concentration (446 mg/L) was obtained for H. caseinilytica K1 grown on cheese whey that produced an EPS composed mostly of galactose, rhamnose, glucose, and mannose, with lower contents of galacturonic acid, ribose, and arabinose and with a molecular weight of 54.5 kDa. Henceforth, the ability of Halomonas strains to use cost-effective substrates, especially cheese whey, is a promising approach for the production of EPS with distinct physicochemical properties suitable for various applications.
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Affiliation(s)
- Ichrak Joulak
- Laboratoire Analyse, Valorisation Et Sécurité Des Aliments, Université de Sfax, ENIS, 3038, Sfax, Tunisia
| | - Patrícia Concórdio-Reis
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
| | - Cristiana A V Torres
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
| | - Chantal Sevrin
- Interfaculty Research Centre of Biomaterials (CEIB), University of Liège, Liège, Belgium
| | - Christian Grandfils
- Interfaculty Research Centre of Biomaterials (CEIB), University of Liège, Liège, Belgium
| | - Hamadi Attia
- Laboratoire Analyse, Valorisation Et Sécurité Des Aliments, Université de Sfax, ENIS, 3038, Sfax, Tunisia
| | - Filomena Freitas
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
| | - Maria A M Reis
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
- UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, Caparica, Lisbon, Portugal
| | - Samia Azabou
- Laboratoire Analyse, Valorisation Et Sécurité Des Aliments, Université de Sfax, ENIS, 3038, Sfax, Tunisia.
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Petrova P, Arsov A, Ivanov I, Tsigoriyna L, Petrov K. New Exopolysaccharides Produced by Bacillus licheniformis 24 Display Substrate-Dependent Content and Antioxidant Activity. Microorganisms 2021; 9:microorganisms9102127. [PMID: 34683448 PMCID: PMC8540526 DOI: 10.3390/microorganisms9102127] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/01/2021] [Accepted: 10/08/2021] [Indexed: 01/18/2023] Open
Abstract
Bacillus licheniformis is a soil bacterium with many industrial applications. In addition to enzymes, platform chemicals, antibiotics and phytohormones, the species produces exopolysaccharides (EPSs) of various biological activities. This study revealed that Bulgarian isolate B. licheniformis 24 produced EPSs consisting of galactose, glucose and mannose with substrate-dependent ratio. From glucose, B. licheniformis 24 secreted EPS1, consisting of 54% galactose, 39% glucose and 7% mannose. From fructose, the strain formed EPS2, containing 51% glucose, 30% mannose and 19% galactose. Batch cultivation in flasks yielded 2.2–2.6 g/L EPS1 and 1.90–2.11 g/L EPS2. Four to five times higher yields of EPS were obtained from both substrates during batch and fed-batch processes in a fermenter at 37.8 °C, pH 6.2 and aeration 3.68 vvm. The batch process with 200 g/L of starting substrates received 9.64 g/L EPS1 and 6.29 g/L EPS2, reaching maximum values at the 33rd and 24th h, respectively. Fed-batch fermentation resulted in the highest yields, 12.61 g/L EPS1 and 7.03 g/L EPS2. In all processes, EPSs were produced only in the exponential growth phase. Both EPSs exhibited antioxidant activity, but EPS2 was much more potent in this regard, reaching 811 μM Vitamin C Equivalent Antioxidant Capacity (versus 135 μM for EPS1). EPS1 displayed antibacterial activity against a non-O1 strain of Vibrio cholerae.
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Affiliation(s)
- Penka Petrova
- Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (A.A.); (I.I.)
- Correspondence: (P.P.); (K.P.)
| | - Alexander Arsov
- Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (A.A.); (I.I.)
| | - Ivan Ivanov
- Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (A.A.); (I.I.)
| | - Lidia Tsigoriyna
- Institute of Chemical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
| | - Kaloyan Petrov
- Institute of Chemical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;
- Correspondence: (P.P.); (K.P.)
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Genome Mining Associated with Analysis of Structure, Antioxidant Activity Reveals the Potential Production of Levan-Rich Exopolysaccharides by Food-Derived Bacillus velezensis VTX20. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11157055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Exopolysaccharides (EPSs) produced by Bacillus species have recently emerged as promising commercial antioxidants in various industries, such as pharmaceutics and biomedicine. However, little is known about EPS production and function from Bacillus velezensis so far. In the present study, the effect of sugar sources on EPS production by B. velezensis VTX20 and the genetic biosynthesis, characteristics, and antioxidant activity of the resulting EPS were evaluated. The strain VTX20 produced the maximum EPS yield of 75.5 ± 4.8 g/L from an initial 200 g/L of sucrose after a 48-h cultivation. Through genomic analysis, ls-levB operon was found, for the first time, to be responsible for the levan-type EPS production in B. velezensis. Biochemical and structural characterization further confirmed the majority of levan, followed by an extremely low level of dextran biopolymer. The water solubility index and water holding capacity of the EPSs were 81.9 ± 3.4% and 100.2 ± 3.4%, respectively. In vitro antioxidant activity analyses showed strong scavenging activity for 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radical values of 40.1–64.0% and 16.0–40%, respectively. These findings shed light on the EPS biosynthesis of B. velezensis at both structural and genetic levels and the potential application of EPS as a natural antioxidant for pharmaceutical and biomedical industries.
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Rončević Z, Bajić B, Vlajkov V, Dodić S, Grahovac J, Jokić A, Dodić J. Optimisation of xanthan production on glycerol-based medium using response surface methodology. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2020. [DOI: 10.1007/s43153-020-00062-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Han HM, Kim IJ, Yun EJ, Lee JW, Cho Y, Jin YS, Kim KH. Overproduction of Exopolysaccharide Colanic Acid by Escherichia coli by Strain Engineering and Media Optimization. Appl Biochem Biotechnol 2020; 193:111-127. [PMID: 32820352 DOI: 10.1007/s12010-020-03409-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 08/12/2020] [Indexed: 02/04/2023]
Abstract
Colanic acid (CA) is one of the major bacterial exopolysaccharides. Due to its biological activities, CA has a significant commercial value. However, the cultivation conditions have not been optimized for the large-scale production of CA. Here, we constructed a CA-overproducing Escherichia coli strain (ΔwaaF) and statistically optimized its culture media for maximum CA production. Glucose and tryptone were found the optimal carbon and nitrogen sources, respectively. Fractional factorial design indicated tryptone and Na2HPO4 as the critical nutrients for CA production. Through further optimization, we achieved a maximum CA production of 1910.0 mg/L, which is approximately 12-fold higher than the amount obtained using the non-optimized medium initially used. The predicted value of CA production was comparable with experimental value (2052.8 mg/L) under the optimized conditions. This study constitutes a successful demonstration of media optimization for increased CA production, and paves the way for future research for achieving large-scale CA production.
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Affiliation(s)
- Hyeong Min Han
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - In Jung Kim
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - Eun Ju Yun
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - Jae Won Lee
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Yoonho Cho
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Kyoung Heon Kim
- Department of Biotechnology, Korea University Graduate School, Seoul, 02841, South Korea.
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de Meneses L, Pereira JR, Sevrin C, Grandfils C, Paiva A, Reis MA, Freitas F. Pseudomonas chlororaphis as a multiproduct platform: Conversion of glycerol into high-value biopolymers and phenazines. N Biotechnol 2020; 55:84-90. [DOI: 10.1016/j.nbt.2019.10.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 10/03/2019] [Accepted: 10/03/2019] [Indexed: 11/25/2022]
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7
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Araújo D, Concórdio-Reis P, Marques AC, Sevrin C, Grandfils C, Alves VD, Fortunato E, Reis MAM, Freitas F. Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions. ENVIRONMENTAL TECHNOLOGY 2020; 41:287-295. [PMID: 29974822 DOI: 10.1080/09593330.2018.1497710] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
In this study, the flocculation properties of FucoPol, a bacterial extracellular polysaccharide, were investigated. FucoPol is a high molecular weight polymer and negatively charged due to the presence of glucuronic acid and the acyl groups succinyl and pyruvyl. High flocculation rate values (>70%) were achieved with a low bioflocculant dosage of 1 mg/L, for pH values in the range 3-5 and temperature within 15-20°C. The bioflocculant was also shown to be stable after freezing/thawing and heating up to 100°C. Given the polymer's anionic character, the size of flocs formed and their surface profile, bridging seems to be the main flocculation mechanism of FucoPol. This study demonstrated that FucoPol is a promising natural, biodegradable and biocompatible alternative to the currently used synthetic or inorganic hazardous products, with potential to be used as a novel flocculation agent in several applications, such as water treatment, food or mining. Further studies will involve evaluating the reduction of cation dosage on flocculation efficiency, as well as testing the applicability of FucoPol to flocculate different types of suspended solids, such as, for example, activated carbons, soil solids or yeast cells.
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Affiliation(s)
- Diana Araújo
- UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Patrícia Concórdio-Reis
- UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Ana C Marques
- i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica, Portugal
| | - Chantal Sevrin
- Interfaculty Research Centre of Biomaterials (CEIB), University of Liège, Liège, Belgium
| | - Christian Grandfils
- Interfaculty Research Centre of Biomaterials (CEIB), University of Liège, Liège, Belgium
| | - Vítor D Alves
- LEAF - Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal
| | - Elvira Fortunato
- i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica, Portugal
| | - Maria A M Reis
- UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Filomena Freitas
- UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
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A New Strain of Bacillus tequilensis CGMCC 17603 Isolated from Biological Soil Crusts: A Promising Sand-Fixation Agent for Desertification Control. SUSTAINABILITY 2019. [DOI: 10.3390/su11226501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In arid and semi-arid desert ecosystems, physical, chemical, and vegetative measures were used to prevent wind erosion. However, studies on the utilization of microbial resources for sand fixation are still limited. To fill this gap, a new strain of Bacillus tequilensis CGMCC 17603 with high productivity of exopolysaccharide (EPS) was isolated from biological soil crusts, and its high-density culture technology and sand-fixing ability were studied. The one-factor-at-a-time approach (OFAT) and Box–Behnken design of CGMCC 17603 showed that the optimum culture conditions were pH 8.5, temperature 31 °C, agitation speed 230 rpm, and inoculation quantity 3%, and the optimum medium was 27.25 g/L glucose, 15.90 g/L yeast extract, and 5.61 g/L MgSO4•7H2O. High-density culture showed that the biomass and EPS yield of CGMCC 17603 increased from 9.62 × 107 to 2.33 × 109 CFU/mL, and from 8.01 to 15.61 g/L, respectively. The field experiments showed that CGMCC 17603 could effectively improve the ability of sand fixation and wind prevention. These results indicated that B. tequilensis, first isolated from cyanobacterial crusts, can be considered as an ideal soil-fixing agent to combat desertification in arid and semi-arid areas.
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A Process Engineering Approach to Improve Production of P(3HB) byCupriavidus necatorfrom Used Cooking Oil. INT J POLYM SCI 2019. [DOI: 10.1155/2019/2191650] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Different feeding strategies, namely, exponential feeding and DO-stat mode, were implemented for the production of poly(3-hydroxybutyrate), P(3HB), byCupriavidus necatorDSM 428 with used cooking oil (UCO) as the sole carbon source. With the exponential feeding strategy, a cell dry mass of 21.3 ± 0.9 g L−1was obtained, with a polymer content of 84.0 ± 4.5 wt.%, giving an overall volumetric productivity of 4.5 ± 0.2 g L−1 day−1. However, the highest P(3HB) volumetric productivity, 12.6 ± 0.8 g L−1 day−1, was obtained when the DO-stat mode was implemented together with the use of ammonium hydroxide for pH control, which served as an additional nitrogen source and allowed to reach higher cell dry mass (7.8 ± 0.6 g L−1). The P(3HB) obtained in all experiments had a high molecular mass, ranging from 0.6 × 105to 2.6 × 105 g mol−1, with low polydispersity indexes of 1.2-1.6. Melting and glass transition temperatures were also similar for the polymer produced with both cultivation strategy, 174°C and 3.0-4.0°C, respectively. The polymer exhibited a crystallinity ranging from 52 to 65%. The DO-stat strategy to feed oil containing substrates as the sole carbon sources was reported for the first time in this study, and the preliminary results obtained show that it is a promising strategy to improve P(3HB) production. Nevertheless, the process requires further optimization in order to make it economically viable.
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Moghannem SAM, Farag MMS, Shehab AM, Azab MS. Exopolysaccharide production from Bacillus velezensis KY471306 using statistical experimental design. Braz J Microbiol 2018; 49:452-462. [PMID: 29449173 PMCID: PMC6066745 DOI: 10.1016/j.bjm.2017.05.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 03/18/2017] [Accepted: 05/09/2017] [Indexed: 11/15/2022] Open
Abstract
Exopolysaccharide (EPS) biopolymers produced by microorganisms play a crucial role in the environment such as health and bio-nanotechnology sectors, gelling agents in food and cosmetic industries in addition to bio-flocculants in the environmental sector as they are degradable, nontoxic. This study focuses on the improvement of EPS production through manipulation of different culture and environmental conditions using response surface methodology (RSM). Plackett–Burman design indicated that; molasses, yeast extract and incubation temperature are the most effective parameters. Box–Behnken RSM indicated that; the optimum concentration for each parameter was 12% (w/v) for molasses, 6 g/L yeast extract and 30 °C for incubation temperature. The most potent bacterial isolate was identified as Bacillus velezensis KY498625. After production, EPS was extracted, purified using DEAE-cellulose, identified using Fourier transform infrared (FTIR), gel permeation chromatography (GPC) and gas chromatography–mass spectroscopy (GC–MS). The result indicated that; it has molecular weight 1.14 × 105 D consisting of glucose, mannose and galactose.
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Affiliation(s)
- Saad A M Moghannem
- Al-Azhar University, Faculty of Science, Botany and Microbiology Department, Cairo, Egypt.
| | - Mohamed M S Farag
- Al-Azhar University, Faculty of Science, Botany and Microbiology Department, Cairo, Egypt
| | - Amr M Shehab
- Al-Azhar University, Faculty of Science, Botany and Microbiology Department, Cairo, Egypt
| | - Mohamed S Azab
- Al-Azhar University, Faculty of Science, Botany and Microbiology Department, Cairo, Egypt
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Raghunandan K, Kumar A, Kumar S, Permaul K, Singh S. Production of gellan gum, an exopolysaccharide, from biodiesel-derived waste glycerol by Sphingomonas spp. 3 Biotech 2018; 8:71. [PMID: 29354382 PMCID: PMC5766450 DOI: 10.1007/s13205-018-1096-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 01/04/2018] [Indexed: 10/18/2022] Open
Abstract
In the present study, biodiesel-derived waste glycerol (WG) was used for the isolation and production of gellan, an exopolysaccharide, on media containing WG as the main carbon source. Two bacterial isolates showed gellan producing potential which were identified as Sphingomonas pseudosanguinis (Accession No. GI:724472387) and Sphingomonas yabuuchiae (GI:724472388) by 16S rRNA gene sequencing. To maximize gellan production by S. pseudosanguinis and S. yabuuchiae, media optimization was performed at different pHs and glycerol concentrations. Morphological observations through microscopic images showed the production of gellan from these isolates. Simple linear regression showed better utilization of WG by S. pseudosanguinis than S. yabuuchiae at pH 6 and pH 7. Though, both the strains showed reverse trend at pH 8. Both the strains were able to produce high amounts of gellan gum (51.6 and 52.6 g/l, respectively) using WG (80 g/l) as the sole carbon source, in a minimal medium. This is the first report on the efficient degradation of WG and low-cost production of gellan. Owing to these characteristics, S. pseudosanguinis and S. yabuuchiae demonstrate great potential for use in the commercial production of gellan and in the bioremediation of WG.
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Affiliation(s)
- Kerisha Raghunandan
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001 South Africa
| | - Ashwani Kumar
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001 South Africa
- Metagenomics and Secretomics Research Laboratory, Department of Botany, Dr. Harisingh Gour University (Central University), Sagar, MP 470003 India
| | - Santhosh Kumar
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001 South Africa
| | - Kugenthiren Permaul
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001 South Africa
| | - Suren Singh
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001 South Africa
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Redmile-Gordon M, Chen L. Zinc toxicity stimulates microbial production of extracellular polymers in a copiotrophic acid soil. INTERNATIONAL BIODETERIORATION & BIODEGRADATION 2017; 119:413-418. [PMID: 28413265 PMCID: PMC5380658 DOI: 10.1016/j.ibiod.2016.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 10/01/2016] [Accepted: 10/03/2016] [Indexed: 05/27/2023]
Abstract
The production of extracellular polymeric substances (EPS) is crucial for biofilm structure, microbial nutrition and proximal stability of habitat in a variety of environments. However, the production patterns of microbial EPS in soils as affected by heavy metal contamination remain uncertain. Here we investigate the extracellular response of the native microbial biomass in a grassland soil treated with refined glycerol or crude unrefined biodiesel co-product (BCP) with and without ZnCl2. We extracted microbial EPS and more readily soluble microbial products (SMP), and quantified total polysaccharide, uronic acid, and protein content in these respective extracts. Organic addition, especially BCP, significantly stimulated the production of EPS-polysaccharide and protein but had no impact on EPS-uronic acids, while in the SMP-fraction, polysaccharides and uronic acids were both significantly increased. In response to the inclusion of Zn2+, both EPS- and SMP-polysaccharides increased. This implies firstly that a tolerance mechanism of soil microorganisms against Zn2+ toxicity exists through the stimulation of SMP and EPS production, and secondly that co-products of biofuel industries may have value-added use in bioremediation efforts to support in-situ production of microbial biopolymers. Microbial films and mobile polymers are likely to impact a range of soil properties. The recent focus on EPS research in soils is anticipated to help contribute an improved understanding of biofilm dynamics in other complex systems - such as continuously operated bioreactors.
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Affiliation(s)
- Marc Redmile-Gordon
- Department of Sustainable Soils and Grassland Systems, Rothamsted Research, Harpenden, Herts AL5 2JQ, UK
| | - Lin Chen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou 310058, China
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Marques R, von Stosch M, Portela RMC, Torres CAV, Antunes S, Freitas F, Reis MAM, Oliveira R. Hybrid modeling of microbial exopolysaccharide (EPS) production: The case of Enterobacter A47. J Biotechnol 2017; 246:61-70. [PMID: 28153767 DOI: 10.1016/j.jbiotec.2017.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/13/2017] [Accepted: 01/27/2017] [Indexed: 11/25/2022]
Abstract
Enterobacter A47 is a bacterium that produces high amounts of a fucose-rich exopolysaccharide (EPS) from glycerol residue of the biodiesel industry. The fed-batch process is characterized by complex non-linear dynamics with highly viscous pseudo-plastic rheology due to the accumulation of EPS in the culture medium. In this paper, we study hybrid modeling as a methodology to increase the predictive power of models for EPS production optimization. We compare six hybrid structures that explore different levels of knowledge-based and machine-learning model components. Knowledge-based components consist of macroscopic material balances, Monod type kinetics, cardinal temperature and pH (CTP) dependency and power-law viscosity models. Unknown dependencies are set to be identified by a feedforward artificial neural network (ANN). A semiparametric identification schema is applied resorting to a data set of 13 independent fed-batch experiments. A parsimonious hybrid model was identified that describes the dynamics of the 13 experiments with the same parameterization. The final model is specific to Enterobacter A47 but can be easily extended to other microbial EPS processes.
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Affiliation(s)
- Rodolfo Marques
- LAQV-REQUIMTE, Systems Biology and Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Campus Caparica, Portugal
| | - Moritz von Stosch
- LAQV-REQUIMTE, Systems Biology and Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Campus Caparica, Portugal
| | - Rui M C Portela
- LAQV-REQUIMTE, Systems Biology and Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Campus Caparica, Portugal
| | - Cristiana A V Torres
- UCIBIO-REQUIMTE, Biochemical Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Sílvia Antunes
- UCIBIO-REQUIMTE, Biochemical Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Filomena Freitas
- UCIBIO-REQUIMTE, Biochemical Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Maria A M Reis
- UCIBIO-REQUIMTE, Biochemical Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Rui Oliveira
- LAQV-REQUIMTE, Systems Biology and Engineering Group, Chemistry Department, FCT/Universidade Nova de Lisboa, 2829-516 Campus Caparica, Portugal.
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Liang TW, Tseng SC, Wang SL. Production and Characterization of Antioxidant Properties of Exopolysaccharide(s) from Peanibacillus mucilaginosus TKU032. Mar Drugs 2016; 14:md14020040. [PMID: 26907304 PMCID: PMC4771993 DOI: 10.3390/md14020040] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 01/29/2016] [Accepted: 02/02/2016] [Indexed: 11/30/2022] Open
Abstract
Natural polysaccharides have received much attention due to their wide range of applications. Although most microbial exopolysaccharides (EPSs) use sugars as the major carbon source, such as glucose or sucrose, in this study, EPSs were induced from a squid pen powder (SPP)-containing medium by Paenibacillus mucilaginosus TKU032, a bacterial strain isolated from Taiwanese soil. Under the optimal culture conditions, the maximum EPS yield (14.8 g/L) was obtained. MALDI-TOF MS analysis of an EPS fraction purified by gel filtration revealed two mass peaks with molecular weights of ∼1.05 × 104 and ∼1.35 × 104 Da, respectively. The analysis of the hydrolysates of TKU032 EPS with cellulase, pectinase or α-amylase indicated that the glycosidic bond of TKU032 EPS is most likely an α-1,4 glycosidic bond and the hydrolysates are similar to those of starch. In addition, the purified EPS demonstrated strong antioxidant abilities.
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Affiliation(s)
- Tzu-Wen Liang
- Life Science Development Center, Tamkang University, No. 151, Yingchuan Rd., Tamsui, New Taipei City 25137, Taiwan.
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan.
| | - Shih-Chun Tseng
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan.
| | - San-Lang Wang
- Life Science Development Center, Tamkang University, No. 151, Yingchuan Rd., Tamsui, New Taipei City 25137, Taiwan.
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan.
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15
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Sathiyanarayanan G, Bhatia SK, Kim HJ, Kim JH, Jeon JM, Kim YG, Park SH, Lee SH, Lee YK, Yang YH. Metal removal and reduction potential of an exopolysaccharide produced by Arctic psychrotrophic bacterium Pseudomonas sp. PAMC 28620. RSC Adv 2016. [DOI: 10.1039/c6ra17450g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Metal reducing potential of an exopolysaccharide (EPS) produced by Arctic glacier soil bacteriumPseudomonassp. PAMC 28620.
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16
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Ruiz C, Gómez M, Villamizar L. Prototipo de formulación y atmósfera de empaque para la cepa antagonista Pseudomonas fluorescens Ps006. REVISTA COLOMBIANA DE BIOTECNOLOGÍA 2015. [DOI: 10.15446/rev.colomb.biote.v17n2.54282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
<p><strong>Título en ingles</strong>: Formulation prototype and atmosphere packaging for the antagonistic strain Pseudomonas fluorescens PS006</p><p>El aislamiento Pseudomonas fluorescens Ps006 demostró alto potencial para ser usado como principio activo de un bioinsumo, por su capacidad para producir biosurfactantes, actividad solubilizadora de fósforo y antagonista ante diferentes fitopatógenos. Por tal razón, el presente trabajo tuvo como objetivos desarrollar y caracterizar un prototipo de formulación a base de P. fluorescens Ps006, estable bajo condiciones de almacenamiento. Inicialmente se caracterizó el principio activo y se seleccionaron los auxiliares de formulación compatibles con el mismo, evaluándose la estabilidad de su mezcla con tres soportes sólidos, a dos humedades diferentes (10% y 20%) durante tres meses de almacenamiento a temperaturas de 8, 18 y 28 ± 2°C. El principio activo demostró actividad antagonista in vitro sobre cuatro fitopatógenos y la temperatura y la humedad afectaron su estabilidad durante el almacenamiento. A los prototipos de formulación más estables en cuanto a viabilidad y actividad biocontroladora se les evaluó su estabilidad en presencia y ausencia de oxígeno y de protectores de membrana. Se seleccionó el soporte S1 al 20% de humedad mezclado con el principio activo sin adición de protectores de membrana y almacenado en presencia de oxígeno, por ser el tratamiento más estable durante seis meses de alamacenamiento a tres temperaturas, con pérdidas de viabilidad inferiores al 5%.</p>
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17
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Biosurfactant synthesis by Rhodococcus erythropolis IMV Ac-5017, Acinetobacter calcoaceticus IMV B-7241 and Nocardia vaccinii IMV B-7405 on byproduct of biodiesel production. FOOD AND BIOPRODUCTS PROCESSING 2015. [DOI: 10.1016/j.fbp.2013.09.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Maalej H, Hmidet N, Boisset C, Buon L, Heyraud A, Nasri M. Optimization of exopolysaccharide production from Pseudomonas stutzeri
AS22 and examination of its metal-binding abilities. J Appl Microbiol 2014; 118:356-67. [DOI: 10.1111/jam.12688] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 10/14/2014] [Accepted: 11/01/2014] [Indexed: 01/29/2023]
Affiliation(s)
- H. Maalej
- Laboratoire de Génie Enzymatique et de Microbiologie; Université de Sfax-Ecole Nationale d'Ingénieurs de Sfax; Sfax Tunisia
| | - N. Hmidet
- Laboratoire de Génie Enzymatique et de Microbiologie; Université de Sfax-Ecole Nationale d'Ingénieurs de Sfax; Sfax Tunisia
| | - C. Boisset
- Centre de Recherches sur les Macromolécules Végétales; C.N.R.S.; Université Joseph Fourier; Grenoble Cedex France
| | - L. Buon
- Centre de Recherches sur les Macromolécules Végétales; C.N.R.S.; Université Joseph Fourier; Grenoble Cedex France
| | - A. Heyraud
- Centre de Recherches sur les Macromolécules Végétales; C.N.R.S.; Université Joseph Fourier; Grenoble Cedex France
| | - M. Nasri
- Laboratoire de Génie Enzymatique et de Microbiologie; Université de Sfax-Ecole Nationale d'Ingénieurs de Sfax; Sfax Tunisia
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19
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Guzik MW, Kenny ST, Duane GF, Casey E, Woods T, Babu RP, Nikodinovic-Runic J, Murray M, O’Connor KE. Conversion of post consumer polyethylene to the biodegradable polymer polyhydroxyalkanoate. Appl Microbiol Biotechnol 2014; 98:4223-32. [DOI: 10.1007/s00253-013-5489-2] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/20/2013] [Accepted: 12/22/2013] [Indexed: 11/28/2022]
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20
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Controlled Production of Exopolysaccharides from Enterobacter A47 as a Function of Carbon Source with Demonstration of Their Film and Emulsifying Abilities. Appl Biochem Biotechnol 2013; 172:641-57. [DOI: 10.1007/s12010-013-0560-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 09/27/2013] [Indexed: 11/26/2022]
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21
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Freitas F, Alves V, Coelhoso I, Reis M. Production and Food Applications of Microbial Biopolymers. CONTEMPORARY FOOD ENGINEERING 2013. [DOI: 10.1201/b15426-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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22
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Qiang L, Yumei L, Sheng H, Yingzi L, Dongxue S, Dake H, Jiajia W, Yanhong Q, Yuxia Z. Optimization of fermentation conditions and properties of an exopolysaccharide from Klebsiella sp. H-207 and application in adsorption of hexavalent chromium. PLoS One 2013; 8:e53542. [PMID: 23320092 PMCID: PMC3539975 DOI: 10.1371/journal.pone.0053542] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 11/29/2012] [Indexed: 11/19/2022] Open
Abstract
The novel exopolysaccharide HZ-7 is produced by Klebsiella sp. H-207, and its fermentation conditions were optimized by response surface methodology (RSM). In this study, the optimized medium consisted of sucrose 31.93 g/L, KNO3 2.17 g/L and K2HPO4 5.47 g/L; while the optimized culture conditions consisted of seed age 13 h, with an inoculum size of 10.6% and incubation temperature of 28.9°C. A maximum HZ-7 yield of about 15.05 g/L was achieved under the optimized conditions using RSM and single-factor experiments. Next the exopolysaccharide HZ-7 was partially purified and characterized. The resulting product showed good properties, such as high concentration of uronic acid (41.67%), low average molecular weight (about 1.94×105 Da) and porous surface structure, were very advantageous to biosorption. Therefore HZ-7 was applied to absorb hexavalent chromium (Cr(VI)). The maximum adsorption efficiency (99.2%) which was obtained at an initial pH of 1.0 along with an initial Cr(VI) concentration of 20 mg/L, was not affected by ordinary metal ions and temperature. These data suggest Klebsiella sp. H-207 exopolysaccharide will be promising potential for industrial application.
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Affiliation(s)
- Li Qiang
- School of Medicine and Life Sciences, University of Jinan, Jinan, China
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
- * E-mail: chm_ (LQ); (L. Yumei)
| | - Li Yumei
- School of Medicine and Life Sciences, University of Jinan, Jinan, China
- * E-mail: chm_ (LQ); (L. Yumei)
| | - Han Sheng
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Liu Yingzi
- Department of Criminal science and Technology, Shandong Police College, Jinan, China
| | - Song Dongxue
- School of Medicine and Life Sciences, University of Jinan, Jinan, China
| | - Hao Dake
- School of Medicine and Life Sciences, University of Jinan, Jinan, China
| | - Wang Jiajia
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Qu Yanhong
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Zheng Yuxia
- School of Medicine and Life Sciences, University of Jinan, Jinan, China
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23
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24
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Production and characterization of exopolysaccharides and antioxidant from Paenibacillus sp. TKU023. N Biotechnol 2011; 28:559-65. [DOI: 10.1016/j.nbt.2011.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 02/25/2011] [Accepted: 03/03/2011] [Indexed: 11/23/2022]
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25
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Freitas F, Alves VD, Reis MA. Advances in bacterial exopolysaccharides: from production to biotechnological applications. Trends Biotechnol 2011; 29:388-98. [DOI: 10.1016/j.tibtech.2011.03.008] [Citation(s) in RCA: 482] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 03/28/2011] [Accepted: 03/30/2011] [Indexed: 01/27/2023]
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26
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Cruz M, Freitas F, Torres CA, Reis MA, Alves VD. Influence of temperature on the rheological behavior of a new fucose-containing bacterial exopolysaccharide. Int J Biol Macromol 2011; 48:695-9. [DOI: 10.1016/j.ijbiomac.2011.02.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 02/15/2011] [Accepted: 02/21/2011] [Indexed: 10/18/2022]
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27
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Kantar C, Demiray H, Dogan NM, Dodge CJ. Role of microbial exopolymeric substances (EPS) on chromium sorption and transport in heterogeneous subsurface soils: I. Cr(III) complexation with EPS in aqueous solution. CHEMOSPHERE 2011; 82:1489-95. [PMID: 21272912 DOI: 10.1016/j.chemosphere.2011.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 12/31/2010] [Accepted: 01/02/2011] [Indexed: 05/06/2023]
Abstract
Chromium (III) binding by exopolymeric substances (EPS) isolated from Pseudomonas putida P18, Pseudomonas aeruginosa P16 and Pseudomonas stutzeri P40 strains were investigated by the determination of conditional stability constants and the concentration of functional groups using the ion-exchange experiments and potentiometric titrations. Spectroscopic (EXAFS) analysis was also used to obtain information on the nature of Cr(III) binding with EPS functional groups. The data from ion-exchange experiments and potentiometric titrations were evaluated using a non-electrostatic discrete ligand approach. The modeling results show that the acid/base properties of EPSs can be best characterized by invoking four different types of acid functional groups with arbitrarily assigned pK(a) values of 4, 6, 8 and 10. The analysis of ion-exchange data using the discrete ligand approach suggests that while the Cr binding by EPS from P. aeruginosa can be successfully described based on a reaction stoichiometry of 1:2 between Cr(III) and HL(2) monoprotic ligands, the accurate description of Cr binding by EPSs extracted from P. putida and P. stutzeri requires postulation of 1:1 Cr(III)-ligand complexes with HL(2) and HL(3) monoprotic ligands, respectively. These results indicate that the carboxyl and/or phosphoric acid sites contribute to Cr(III) binding by microbial EPS, as also confirmed by EXAFS analysis performed in the current study. Overall, this study highlights the need for incorporation of Cr-EPS interactions into transport and speciation models to more accurately assess microbial Cr(VI) reduction and chromium transport in subsurface systems, including microbial reactive treatment barriers.
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Affiliation(s)
- Cetin Kantar
- Mersin University, Faculty of Engineering, Department of Environmental Engineering, Mersin, Turkey.
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28
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Utilization of biodiesel by-products for biogas production. J Biomed Biotechnol 2011; 2011:126798. [PMID: 21403868 PMCID: PMC3051155 DOI: 10.1155/2011/126798] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Revised: 11/22/2010] [Accepted: 01/07/2011] [Indexed: 11/18/2022] Open
Abstract
This contribution reviews the possibility of using the by-products from biodiesel production as substrates for anaerobic digestion and production of biogas. The process of biodiesel production is predominantly carried out by catalyzed transesterification. Besides desired methylesters, this reaction provides also few other products, including crude glycerol, oil-pressed cakes, and washing water. Crude glycerol or g-phase is heavier separate liquid phase, composed mainly by glycerol. A couple of studies have demonstrated the possibility of biogas production, using g-phase as a single substrate, and it has also shown a great potential as a cosubstrate by anaerobic treatment of different types of organic waste or energy crops. Oil cakes or oil meals are solid residues obtained after oil extraction from the seeds. Another possible by-product is the washing water from raw biodiesel purification, which is an oily and soapy liquid. All of these materials have been suggested as feasible substrates for anaerobic degradation, although some issues and inhibitory factors have to be considered.
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