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Leong YK, Show PL, Ooi CW, Ling TC, Lan JCW. Current trends in polyhydroxyalkanoates (PHAs) biosynthesis: Insights from the recombinant Escherichia coli. J Biotechnol 2014; 180:52-65. [DOI: 10.1016/j.jbiotec.2014.03.020] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/03/2014] [Accepted: 03/11/2014] [Indexed: 10/25/2022]
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102
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Valentino F, Beccari M, Fraraccio S, Zanaroli G, Majone M. Feed frequency in a Sequencing Batch Reactor strongly affects the production of polyhydroxyalkanoates (PHAs) from volatile fatty acids. N Biotechnol 2014; 31:264-75. [DOI: 10.1016/j.nbt.2013.10.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 10/10/2013] [Accepted: 10/16/2013] [Indexed: 10/26/2022]
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103
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EngineeredEscherichia colifor Short-Chain-Length Medium-Chain-Length Polyhydroxyalkanoate Copolymer Biosynthesis from Glycerol and Dodecanoate. Biosci Biotechnol Biochem 2014; 77:1262-8. [DOI: 10.1271/bbb.130073] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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104
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Dahman Y, Ugwu CU. Production of green biodegradable plastics of poly(3-hydroxybutyrate) from renewable resources of agricultural residues. Bioprocess Biosyst Eng 2014; 37:1561-8. [DOI: 10.1007/s00449-014-1128-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 01/12/2014] [Indexed: 10/25/2022]
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105
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Laycock B, Halley P, Pratt S, Werker A, Lant P. The chemomechanical properties of microbial polyhydroxyalkanoates. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2013.06.008] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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106
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Phukon P, Phukan MM, Phukan S, Konwar BK. Polyhydroxyalkanoate production by indigenously isolated Pseudomonas aeruginosa using glycerol by-product of KCDL biodiesel as an inexpensive carbon source. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0800-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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107
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Sukan A, Roy I, Keshavarz T. Agro-Industrial Waste Materials as Substrates for the Production of Poly(3-Hydroxybutyric Acid). ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jbnb.2014.54027] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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108
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Sreedevi S, Unni KN, Sajith S, Priji P, Josh MS, Benjamin S. Bioplastics: Advances in Polyhydroxybutyrate Research. ADVANCES IN POLYMER SCIENCE 2014. [DOI: 10.1007/12_2014_297] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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109
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110
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Agnew DE, Pfleger BF. Synthetic biology strategies for synthesizing polyhydroxyalkanoates from unrelated carbon sources. Chem Eng Sci 2013; 103:58-67. [DOI: 10.1016/j.ces.2012.12.023] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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111
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Wang Y, Cai J, Lan J, Liu Z, He N, Shen L, Li Q. Biosynthesis of poly(hydroxybutyrate-hydroxyvalerate) from the acclimated activated sludge and microbial characterization in this process. BIORESOURCE TECHNOLOGY 2013; 148:61-69. [PMID: 24035892 DOI: 10.1016/j.biortech.2013.08.102] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 08/14/2013] [Accepted: 08/17/2013] [Indexed: 06/02/2023]
Abstract
This study investigated the effects of substrate composition (acetate and propionate) on synthesis of various mix of poly(hydroxybutyrate-hydroxyvalerate) (P(HB/HV)) from activated sludge, which was acclimated using a single carbon (acetate) and mixed carbons (acetate and propionate). Results of batch P(HB/HV) production tests indicated that the yield and synthesis rate of P(HB/HV) decreased as the proportion of propionate in the substrate increased. However, mixed-carbon-acclimated sludge with acetate and propionate exhibited better P(HB/HV) production performance than with acetate-acclimated sludge in terms of substrate utilization, yield of P(HB/HV) and HV fraction in P(HB/HV). The desired hydroxyvalerate (HV) fraction (0-74%) of the P(HB/HV) could be obtained based on the substrate composition and sludge acclimation. Furthermore, PCR-DGGE analysis indicated that specific species dominated the activated sludge used for P(HB/HV) production. Acidobacteria and Burkholderiales were the dominant bacterial populations and played an important role in HV synthesis.
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Affiliation(s)
- Yuanpeng Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, The Key Laboratory for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen, PR China.
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Bhuwal AK, Singh G, Aggarwal NK, Goyal V, Yadav A. Isolation and screening of polyhydroxyalkanoates producing bacteria from pulp, paper, and cardboard industry wastes. Int J Biomater 2013; 2013:752821. [PMID: 24288534 PMCID: PMC3830821 DOI: 10.1155/2013/752821] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 08/08/2013] [Accepted: 08/20/2013] [Indexed: 12/04/2022] Open
Abstract
Background. Polyhydroxyalkanoates (PHAs) are storage materials that accumulate by various bacteria as energy and carbon reserve materials. They are biodegradable, environmentally friendly, and also biocompatible bioplastics. Unlike petrochemical-based plastics that take several decades to fully degrade, PHAs can be completely degraded within a year by variety of microorganisms into CO2 and water. In the present study, we aim to utilize pulp, paper, and cardboard industry sludge and waste water for the isolation and screening of polyhydroxyalkanoates (PHAs) accumulating bacteria and production of cost-effective PHB using cardboard industry waste water. Results. A total of 42 isolates showed black-blue coloration when stained with Sudan black B, a preliminary screening agent for lipophilic compounds, and a total of 15 isolates showed positive result with Nile blue A staining, a more specific dye for PHA granules. The isolates NAP11 and NAC1 showed maximum PHA production 79.27% and 77.63% with polymer concentration of 5.236 g/L and 4.042 g/L with cardboard industry waste water. Both of the selected isolates, NAP11 and NAC1, were classified up to genus level by studying their morphological and biochemical characteristics and were found to be Enterococcus sp., Brevundimonas sp. and, respectively. Conclusion. The isolates Enterococcus sp. NAP11 and Brevundimonas sp. NAC1 can be considered as good candidates for industrial production of PHB from cardboard industry waste water. We are reporting for the first time the use of cardboard industry waste water as a cultivation medium for the PHB production.
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Affiliation(s)
- Anish Kumari Bhuwal
- Department of Microbiology, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Gulab Singh
- Department of Microbiology, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Neeraj Kumar Aggarwal
- Department of Microbiology, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Varsha Goyal
- Department of Microbiology, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Anita Yadav
- Department of Biotechnology, Kurukshetra University, Kurukshetra 136119, India
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113
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Physiology of Lichtheimia ramosa obtained by solid-state bioprocess using fruit wastes as substrate. Bioprocess Biosyst Eng 2013; 37:727-34. [DOI: 10.1007/s00449-013-1043-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/20/2013] [Indexed: 11/25/2022]
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114
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A review on production of poly β hydroxybutyrates from cyanobacteria for the production of bio plastics. ALGAL RES 2013. [DOI: 10.1016/j.algal.2013.03.002] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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115
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Sathiyanarayanan G, Kiran GS, Selvin J, Saibaba G. Optimization of polyhydroxybutyrate production by marine Bacillus megaterium MSBN04 under solid state culture. Int J Biol Macromol 2013; 60:253-61. [PMID: 23748002 DOI: 10.1016/j.ijbiomac.2013.05.031] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 05/17/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Abstract
A marine sponge-associated bacterium Bacillus megaterium MSBN04 was used for the production of polyhydroxybutyrate (PHB) under solid state culture (SSC). A central composite design (CCD) was employed to optimize the production medium and to find out the interactive effects of four independent variables, viz. tapioca industry waste, palm jaggery, horse gram flour and trace element solution on PHB production. The maximum yield of PHB 8.637 mg g(-1) of substrate (tapioca industry waste) was achieved from biomass 15.203 mg g(-1) of substrate, using statistically optimized medium. The horse gram flour (nitrogen source) and trace element solution were found to be critical control factors for PHB synthesis. The (1)H NMR analysis revealed that the polymer was a PHB monomer. PHB obtained from this study having high molecular weight (6.7×10(5) Da) with low polydispersity index (PDI) value (1.71) and produced PHB was used to synthesize PHB polymeric nanoparticles using solvent displacement approach. Therefore, B. megaterium MSBN04 is an ideal candidate that can be exploited biotechnologically for the commercial production of PHB under solid state culture.
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Affiliation(s)
- G Sathiyanarayanan
- School of Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
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116
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Process optimization and production of polyhydroxybutyrate using palm jaggery as economical carbon source by marine sponge-associated Bacillus licheniformis MSBN12. Bioprocess Biosyst Eng 2013; 36:1817-27. [PMID: 23670633 DOI: 10.1007/s00449-013-0956-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 04/12/2013] [Indexed: 10/26/2022]
Abstract
The Polyhydroxybutyrate (PHB) producer, Bacillus licheniformis MSBN12 was isolated from the marine sponge Callyspongia diffusa. The PHB production of B. licheniformis MSBN12 was optimized using a four-factor Box-Behnken design to find the interactive effects of variables such as palm jaggery, wheat bran, seawater, and incubation temperature. The maximum yield of PHB (6.38 g/L) was achieved through response surface methodology-based optimization and the optimized conditions were further used for the batch and fed-batch fermentation. Maximum biomass was reached at 48 and 36 h of incubation with PHB accumulation of 62.91 and 67.16 % (w/w of dry cells) for batch and fed-batch process. The production of PHB under fed-batch process with B. licheniformis MSBN12 was increased threefold over shake flask culture when palm jaggery as sole carbon source. The ¹H NMR data was extrapolated with peaks of the PHB reference standard and confirmed as PHB analog.
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117
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Sathiyanarayanan G, Saibaba G, Seghal Kiran G, Selvin J. A statistical approach for optimization of polyhydroxybutyrate production by marine Bacillus subtilis MSBN17. Int J Biol Macromol 2013; 59:170-7. [PMID: 23603079 DOI: 10.1016/j.ijbiomac.2013.04.040] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 04/09/2013] [Accepted: 04/12/2013] [Indexed: 11/16/2022]
Abstract
The important biological macromolecule polyhydroxybutyrate (PHB) producing Bacillus subtilis was isolated from the marine sponge Callyspongia diffusa and identified by means of 16S rRNA analysis. The central composite design (CCD) was used to optimize the PHB production using cheap raw materials such as pulp industry waste (PIW), tamarind kernel powder (TKP), palm jaggery (PJ) and green gram flour (GGF). The extracted polymer was characterized by (1)H NMR analysis. The PIW was fed at three different intervals and the maximum production of PHB (19.08g/L) was attained after a period of 40h of incubation of B. subtilis. Dissolved oxygen, sodium chloride and nitrogen source were found to be the critical control factors that affected the PHB polymer production. The present investigation demonstrates an inexpensive model of producing PHB green thermoplastics in vitro for biomedical applications.
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Affiliation(s)
- G Sathiyanarayanan
- Department of Bioinformatics, School of Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
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118
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Laycock B, Halley P, Pratt S, Werker A, Lant P. The chemomechanical properties of microbial polyhydroxyalkanoates. Prog Polym Sci 2013. [DOI: 10.1016/j.progpolymsci.2012.06.003] [Citation(s) in RCA: 197] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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119
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Cavalheiro JM, Almeida MCMD, Fonseca MMRD, Carvalho CCD. Adaptation of Cupriavidus necator to conditions favoring polyhydroxyalkanoate production. J Biotechnol 2013; 164:309-17. [DOI: 10.1016/j.jbiotec.2013.01.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 01/08/2013] [Accepted: 01/14/2013] [Indexed: 10/27/2022]
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120
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García IL, López JA, Dorado MP, Kopsahelis N, Alexandri M, Papanikolaou S, Villar MA, Koutinas AA. Evaluation of by-products from the biodiesel industry as fermentation feedstock for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) production by Cupriavidus necator. BIORESOURCE TECHNOLOGY 2013; 130:16-22. [PMID: 23280181 DOI: 10.1016/j.biortech.2012.11.088] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 11/16/2012] [Accepted: 11/19/2012] [Indexed: 06/01/2023]
Abstract
Utilization of by-products from oilseed-based biodiesel production (crude glycerol, rapeseed meal hydrolysates) for microbial polyhydroxyalkanoate (PHA) production could lead to the replacement of expensive carbon sources, nutrient supplements and precursors for co-polymer production. Batch fermentations in shake flasks with varying amounts of free amino nitrogen led to the production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (P(3HB-co-3HV)) with a 2.8-8% 3HV content. Fed-batch fermentations in shake flasks led to the production of 10.9g/L P(3HB-co-3HV) and a 55.6% P(3HB-co-3HV) content. NaCl concentrations between 2 and 6g/L gradually became inhibitory to bacterial growth and PHA formation, whereas in the case of K(2)SO(4), the inhibitory effect was observed only at concentrations higher than 20g/L. Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and nuclear magnetic resonance ((13)C NMR) demonstrated that the incorporation of 3HV into the obtained P(3HB-co-3HV) lowered glass transition temperature, crystallinity and melting point as compared to polyhydroxybutyrate. Integrating PHA production in existing oilseed-based biodiesel plants could enhance the viability and sustainability of this first generation biorefinery.
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Affiliation(s)
- I L García
- Department of Physical Chemistry and Applied Thermodynamics, Escuela Politecnica Superior, University of Cordoba, campus de excelencia agroalimentario, ceiA3, 23071 Cordoba, Spain
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121
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Neves A, Müller J. Use of enzymes in extraction of polyhydroxyalkanoates produced byCupriavidus necator. Biotechnol Prog 2012; 28:1575-80. [DOI: 10.1002/btpr.1624] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/28/2012] [Indexed: 11/06/2022]
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122
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Sharma PK, Fu J, Cicek N, Sparling R, Levin DB. Kinetics of medium-chain-length polyhydroxyalkanoate production by a novel isolate of Pseudomonas putida LS46. Can J Microbiol 2012; 58:982-9. [DOI: 10.1139/w2012-074] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Six bacteria that synthesize medium-chain-length polyhydroxyalkanoates (mcl-PHAs) were isolated from sewage sludge and hog barn wash and identified as strains of Pseudomonas and Comamonas by 16S rDNA gene sequencing. One isolate, Pseudomonas putida LS46, showed good PHA production (22% of cell dry mass) in glucose medium, and it was selected for further studies. While it is closely related to other P. putida strains (F1, KT2440, BIRD-1, GB-1, S16, and W619), P. putida LS46 was genetically distinct from these other strains on the basis of nucleotide sequence analysis of the cpn60 gene hypervariable region. PHA production was detected as early as 12 h in both nitrogen-limited and nitrogen-excess conditions. The increase in PHA production after 48 h was higher in nitrogen-limited cultures than in nitrogen-excess cultures. Pseudomonas putida LS46 produced mcl-PHAs when cultured with glucose, glycerol, or C6–C14 saturated fatty acids as carbon sources, and mcl-PHAs accounted for 56% of the cell dry mass when cells were batch cultured in medium containing 20 mmol/L octanoate. Although 3-hydroxydecanoate was the major mcl-PHA monomer (58.1–68.8 mol%) in P. putida LS46 cultured in glucose medium, 3-hydroxyoctanoate was the major monomer produced in octanoate medium (88 mol%).
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Affiliation(s)
- Parveen K. Sharma
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
| | - Jilagamazhi Fu
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
| | - Nazim Cicek
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
| | - Richard Sparling
- Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
| | - David B. Levin
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada
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123
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Modeling and optimization of poly(3hydroxybutyrate-co-3hydroxyvalerate) production from cane molasses by Azohydromonas lata MTCC 2311 in a stirred-tank reactor: effect of agitation and aeration regimes. ACTA ACUST UNITED AC 2012; 39:987-1001. [DOI: 10.1007/s10295-012-1102-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Accepted: 02/02/2012] [Indexed: 10/28/2022]
Abstract
Abstract
The effects of agitation and aeration rates on copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)] production by Azohydromonas lata MTCC 2311 using cane molasses supplemented with propionic acid in a bioreactor were investigated. The experiments were conducted in a three-level factorial design by varying the impeller (150–500 rev min−1) and aeration (0.5–1.5 vvm) rates. Further, the data were fitted to mathematical models [quadratic polynomial equation and artificial neural network (ANN)] and process variables were optimized by genetic algorithm-coupled models. ANN and hybrid ANN-GA were found superior for modeling and optimization of process variables, respectively. The maximum copolymer concentration of 7.45 g l−1 with 21.50 mol% of 3HV was predicted at process variables: agitation speed, 287 rev min−1; and aeration rate, 0.85 vvm, which upon validation gave 7.20 g l−1 of P(3HB-co-3HV) with 21 mol% of 3HV with the prediction error (%) of 3.38 and 2.32, respectively. Agitation speed established a relative high importance of 72.19% than of aeration rate (27.80%) for copolymer accumulation. The volumetric gas–liquid mass transfer coefficient (k L a) was strongly affected by agitation and aeration rates. The highest P(3HB-co-3HV) productivity of 0.163 g l−1 h−1 was achieved at 0.17 s−1 of k L a value. During the early phase of copolymer production process, 3HB monomers were accumulated, which were shifted to 3HV units (9–21%) during the cultivation period of 24–42 h. The enhancement of 7.5 and 34% were reported for P(3HB-co-3HV) production and 3HV content, respectively, by hybrid ANN-GA paradigm, which revealed the significant utilization of cane molasses for improved copolymer production.
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124
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Escapa IF, del Cerro C, García JL, Prieto MA. The role of GlpR repressor inPseudomonas putidaKT2440 growth and PHA production from glycerol. Environ Microbiol 2012; 15:93-110. [DOI: 10.1111/j.1462-2920.2012.02790.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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125
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Berezina N. Novel approach for productivity enhancement of polyhydroxyalkanoates (PHA) production by Cupriavidus necator DSM 545. N Biotechnol 2012; 30:192-5. [PMID: 22634022 DOI: 10.1016/j.nbt.2012.05.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 05/14/2012] [Indexed: 11/16/2022]
Abstract
In the global context of increased concerns for our environment, the use of bioplastics as a replacement for existing petroleum-based polymers is an important challenge. Indeed, bioplastics hardly meet economical and technical constraints. One, of the most promising among currently studied bioplastics, is the polyhydroxyalkanoate (PHA). To circumvent the economical issue for this particular biopolymer one solution can be the enhancement of the overall productivity by the improvement of the nutritional medium of the microorganism producing the biopolymer. Thus, several nutrition media, supplemented or not with sodium glutamate, were tested for the growth and the PHA production by Cupriavidus necator DSM 545 strain. The most efficient for the biomass and the PHA production improvement were found to be the Luria broth (LB) and the Bonnarme's media, both supplemented with 10 g/L sodium glutamate. Hence the overall productivity was 33 times enhanced comparing to traditional cultivation methods. These results open a new route for the PHA production by C. necator which appears to be more suitable on a rich, or enriched, medium with no limiting factors.
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126
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Akaraonye E, Moreno C, Knowles JC, Keshavarz T, Roy I. Poly(3-hydroxybutyrate) production by Bacillus cereus SPV using sugarcane molasses as the main carbon source. Biotechnol J 2011; 7:293-303. [DOI: 10.1002/biot.201100122] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 06/06/2011] [Accepted: 08/25/2011] [Indexed: 11/07/2022]
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127
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From wastewater to bioenergy and biochemicals via two-stage bioconversion processes: a future paradigm. Biotechnol Adv 2011; 29:972-82. [PMID: 21884782 DOI: 10.1016/j.biotechadv.2011.08.012] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 08/06/2011] [Accepted: 08/14/2011] [Indexed: 11/22/2022]
Abstract
Recovery of bioenergy and biochemicals from wastewater has attracted growing and widespread interests. In this respect, two-stage bioconversion process (TSBP) offers an appealing avenue to achieve stepwise and directional substrate conversion in separated stages. Such a biosystem not only enables enhanced degradation of organics, but also favors a high product yield and quality. Various TSBRs have been developed for the production of methane, hydrogen, electricity, bioplastics, bioflocculants, biopesticides, biosurfactants and other value-added products, demonstrating marked advantages over the conventional one-stage processes. It represents a promising, and likely the sole viable, paradigm for future application. However, there are also many remaining challenges. This paper provides an overview of the various TSBPs, introduces the recent advances, and discusses the major challenges and the future perspectives for practical application.
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128
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Verlinden RAJ, Hill DJ, Kenward MA, Williams CD, Piotrowska-Seget Z, Radecka IK. Production of polyhydroxyalkanoates from waste frying oil by Cupriavidus necator. AMB Express 2011; 1:11. [PMID: 21906352 PMCID: PMC3222315 DOI: 10.1186/2191-0855-1-11] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Accepted: 06/10/2011] [Indexed: 11/18/2022] Open
Abstract
Polyhydroxyalkanoates (PHAs) are biopolymers, which can replace petrochemical plastics in many applications. However, these bioplastics are currently far more expensive than petrochemical plastics. Many researchers are investigating the use of inexpensive substrates derived from waste streams. Waste frying oil is abundant and can be used in PHA production without filtration. Cupriavidus necator (formerly known as Ralstonia eutropha) is a versatile organism for the production of PHAs. Small-scale batch fermentation studies have been set up, using different concentrations of pure vegetable oil, heated vegetable oil and waste frying oil. These oils are all rapeseed oils. It has been shown that Cupriavidus necator produced the homopolymer polyhydroxybutyrate (PHB) from the rapeseed oils. The achieved PHB concentration from waste frying oil was 1.2 g/l, which is similar to a concentration that can be obtained from glucose. The PHB harvest from pure oil and heated oil was 0.62 g/l and 0.9 g/l respectively. A feed of waste frying oil could thus achieve more biopolymer than pure vegetable oil. While the use of a waste product is beneficial from a life-cycle perspective, PHB is not the only product that can be made from waste oil. The collection of waste frying oil is becoming more widespread, making waste oil a good alternative to purified oil or glucose for PHB production.
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129
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Wu D, Lü F, Gao H, Shao L, He P. Mesophilic bio-liquefaction of lincomycin manufacturing biowaste: the influence of total solid content and inoculum to substrate ratio. BIORESOURCE TECHNOLOGY 2011; 102:5855-5862. [PMID: 21376573 DOI: 10.1016/j.biortech.2011.02.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 01/31/2011] [Accepted: 02/01/2011] [Indexed: 05/30/2023]
Abstract
As the potential source of environmental antibiotic pollution, large amount of biowaste generated from antibiotic fermentation manufacture highlights its beneficial utilization for resource and nutrients recovery; which is suitable for anaerobic bio-liquefaction (hydrolysis and acidification). However, its high solid content and residual antibiotics are a cause for concern. In this study, batch anaerobic experiments were conducted to evaluate the bio-liquefaction performance of lincomycin manufacturing biowaste at different total solid content (TS) and the ratios of seeding granular sludge (inoculum) to substrate (ISR). The results showed that lincomycin manufacturing biowaste had high bio-liquefaction efficiency, with the highest 10d volatile solid (VS) degradation rate being approximately 38%. The bio-liquefaction efficiency of protein could reach 100%. Predicted by response surface methodology, 1580 mg/L gVS volatile fatty acids (VFAs) and 497 mg/L gVS ammonium were obtained at a TS of 10%, ISR of 3 and solid retention time of 9.5d, which is the optimum scenario.
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Affiliation(s)
- Duo Wu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
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130
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Lee SH, Kim JH, Mishra D, Ni YY, Rhee YH. Production of medium-chain-length polyhydroxyalkanoates by activated sludge enriched under periodic feeding with nonanoic acid. BIORESOURCE TECHNOLOGY 2011; 102:6159-66. [PMID: 21463934 DOI: 10.1016/j.biortech.2011.03.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2011] [Revised: 03/08/2011] [Accepted: 03/08/2011] [Indexed: 05/20/2023]
Abstract
The potential use of activated sludge for the production of medium-chain-length polyhydroxyalkanoates (MCL-PHAs) was investigated. The enrichment of bacterial populations capable of producing MCL-PHAs was achieved by periodic feeding with nonanoic acid in a sequencing batch reactor (SBR). Denaturing gradient gel electrophoresis analysis revealed Pseudomonas aeruginosa strains to be predominant in the bacterial community during the SBR process. The composition of PHA synthesized by the enriched biomass from nonanoic acid consisted of a large concentration (>89 mol%) of MCL monomer units and a small amount of short-chain-length monomer units. Under fed-batch fermentation with continuous feeding of nonanoic acid at a flow rate of 0.225 g/L/h and a C/N ratio of 40, a maximum PHA content of 48.6% dry cell weight and a conversion yield (Y(p/s)) of 0.94 g/g were achieved. These results indicate that MCL-PHA production by activated sludge is a promising alternative to typical pure culture approaches.
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Affiliation(s)
- Sun Hee Lee
- Department of Microbiology and Molecular Biology, Chungnam National University, Daejeon 305-764, Republic of Korea
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131
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Hafuka A, Sakaida K, Satoh H, Takahashi M, Watanabe Y, Okabe S. Effect of feeding regimens on polyhydroxybutyrate production from food wastes by Cupriavidus necator. BIORESOURCE TECHNOLOGY 2011; 102:3551-3. [PMID: 20870404 DOI: 10.1016/j.biortech.2010.09.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 09/02/2010] [Accepted: 09/04/2010] [Indexed: 05/06/2023]
Abstract
We investigated the effects of different feeding regimens (1-pulse, stepwise, and continuous) of fermented food-waste liquid on polyhydroxybutyrate (PHB) production. The fermentation liquid was filtered with a membrane filter (pore size, 0.45 μm) to remove anaerobic microorganisms and solids and used as a carbon source for Cupriavidus necator. One-pulse feeding yielded the highest cell concentration of C. necator. However, the PHB concentration was higher in the stepwise- and continuous-feeding regimens. Therefore, the continuous-feeding regimen was used for continuous PHB production. PHB could be produced over 259 h (8 draw-fill cycles) with a maximal PHB content of 87%, but the PHB concentration and content decreased with an increase in the operation time.
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Affiliation(s)
- Akira Hafuka
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Japan
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132
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Cerrone F, Sánchez-Peinado MDM, Rodríguez-Díaz M, González-López J, Pozo C. PHAs production by strains belonging to Massilia genus from starch. STARCH-STARKE 2011. [DOI: 10.1002/star.201000132] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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133
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Liu Z, Wang Y, He N, Huang J, Zhu K, Shao W, Wang H, Yuan W, Li Q. Optimization of polyhydroxybutyrate (PHB) production by excess activated sludge and microbial community analysis. JOURNAL OF HAZARDOUS MATERIALS 2011; 185:8-16. [PMID: 20970922 DOI: 10.1016/j.jhazmat.2010.08.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 07/20/2010] [Accepted: 08/03/2010] [Indexed: 05/30/2023]
Abstract
In this study, a high value-added and biodegradable thermoplastic, polyhydroxybutyrate (PHB), was produced by excess activated sludge. The effects of the nutritional condition, aeration mode, sodium acetate concentration and initial pH value on PHB accumulation in the activated sludge were investigated. The maximum PHB content and PHB yield of 67.0% (dry cell weight) and 0.740gCODgCOD(-1) (COD: chemical oxygen demand), respectively, were attained by the sludge in the presence of 6.0gL(-1) sodium acetate, with an initial pH value of 7.0 and intermittent aeration. The analysis of the polymerase chain reaction (PCR)-denaturing gradient-gel-electrophoresis (DGGE) sequencing indicated that the microbial community of the sludge was significantly different during the process of PHB accumulation. Three PHB-accumulating microorganisms, which were affiliated with the Thauera, Dechloromonas and Competibacter lineages, were found in the excess activated sludge under different operating conditions for PHB accumulation.
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Affiliation(s)
- Zhenggui Liu
- Environmental Science Research Center, College of Oceanography and Environmental Science, Xiamen University, Xiamen 361005, PR China
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134
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Keshavarz T, Roy I. Polyhydroxyalkanoates: bioplastics with a green agenda. Curr Opin Microbiol 2010; 13:321-6. [DOI: 10.1016/j.mib.2010.02.006] [Citation(s) in RCA: 364] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Accepted: 02/19/2010] [Indexed: 01/27/2023]
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135
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Yan Q, Zhao M, Miao H, Ruan W, Song R. Coupling of the hydrogen and polyhydroxyalkanoates (PHA) production through anaerobic digestion from Taihu blue algae. BIORESOURCE TECHNOLOGY 2010; 101:4508-4512. [PMID: 20153165 DOI: 10.1016/j.biortech.2010.01.073] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 01/18/2010] [Accepted: 01/20/2010] [Indexed: 05/28/2023]
Abstract
Coupling bio-production of hydrogen and polyhydroxyalkanoates (PHA) from Taihu blue algae through metabolites circulation was investigated. It was found that the pH adjustment, especially basification was more practical and efficient than other methods for the pretreatment of blue algae before anaerobic digestion. On this occasion, SCOD, biogas accumulation and hydrogen content reached 26 mg/gTS, 500 mL and 37.2%, and which were 4.3, 1.3 and 14.4 times of those of the control group, respectively. Secondly, amounts of both butyric acid and hydrogen could be further increased when blue algae was alkali pretreated at pH 13, as the accumulation of butyric acid, acetic acid and hydrogen reached 1.7, 1.4 and 3.8 times compared to those of the control, respectively. Finally, the coupling bio-production of hydrogen and PHA was conducted through pumping organic residues into PHA fermenter from anaerobic digester. Remarkably, it was found that the larger the pumping rate of carbon and nitrogen sources supply, the higher the yield of DCW and PHA could be expected by Bacillus cereus.
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Affiliation(s)
- Qun Yan
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
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