1
|
Property evaluation of bacterial cellulose nanostructures produced from confectionery wastes. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
2
|
Ladakis D, Stylianou E, Ioannidou SM, Koutinas A, Pateraki C. Biorefinery development, techno-economic evaluation and environmental impact analysis for the conversion of the organic fraction of municipal solid waste into succinic acid and value-added fractions. BIORESOURCE TECHNOLOGY 2022; 354:127172. [PMID: 35447331 DOI: 10.1016/j.biortech.2022.127172] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
The organic fraction of municipal solid waste (OFMSW) was used for biorefinery development within a circular bioeconomy context towards extraction of lipids/fats and proteins with 100% and 68% recovery yields, respectively, as well as succinic acid (SA) production. A nutrient-rich hydrolysate (89.1 g/L sugars) produced using crude enzymes derived via solid state fermentation of Aspergillus awamori, was employed in Actinobacillus succinogenes fermentation leading to 31.7 gSA/L with 0.68 g/g yield and 0.67 g/L/h productivity. The SA minimum selling price ($1.13-2.39/kgSA) considering 60,000 tSA/year production varied depending on co-product market prices and OFMSW management fees. The biorefinery using 1000 kg OFMSW contributes 35% lower CO2 emissions than conventional processes for the production of 105 kg vegetable oil, 87 kg vegetable protein and 206.4 kg fossil-SA considering also the CO2 emissions due to OFMSW landfilling. The proposed OFMSW biorefinery leads to cost-competitive SA production with lower CO2 emissions for OFMSW treatment.
Collapse
Affiliation(s)
- Dimitrios Ladakis
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Eleni Stylianou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Sofia-Maria Ioannidou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Apostolis Koutinas
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Chrysanthi Pateraki
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece.
| |
Collapse
|
3
|
Samrot AV, Samanvitha SK, Shobana N, Renitta ER, Senthilkumar P, Kumar SS, Abirami S, Dhiva S, Bavanilatha M, Prakash P, Saigeetha S, Shree KS, Thirumurugan R. The Synthesis, Characterization and Applications of Polyhydroxyalkanoates (PHAs) and PHA-Based Nanoparticles. Polymers (Basel) 2021; 13:3302. [PMID: 34641118 PMCID: PMC8512352 DOI: 10.3390/polym13193302] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/31/2021] [Accepted: 08/31/2021] [Indexed: 12/22/2022] Open
Abstract
Polyhydroxyalkanoates (PHAs) are storage granules found in bacteria that are essentially hydroxy fatty acid polyesters. PHA molecules appear in variety of structures, and amongst all types of PHAs, polyhydroxybutyrate (PHB) is used in versatile fields as it is a biodegradable, biocompatible, and ecologically safe thermoplastic. The unique physicochemical characteristics of these PHAs have made them applicable in nanotechnology, tissue engineering, and other biomedical applications. In this review, the optimization, extraction, and characterization of PHAs are described. Their production and application in nanotechnology are also portrayed in this review, and the precise and various production methods of PHA-based nanoparticles, such as emulsion solvent diffusion, nanoprecipitation, and dialysis are discussed. The characterization techniques such as UV-Vis, FTIR, SEM, Zeta Potential, and XRD are also elaborated.
Collapse
Affiliation(s)
- Antony V. Samrot
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jalan SP2, Bandar Saujana Putra, Jenjarom 42610, Selangor, Malaysia
| | - Sree K. Samanvitha
- Department of Biotechnology, Shanmugha Arts, Science, Technology & Research Academy, Thanjavur 613401, Tamil Nadu, India;
| | - N. Shobana
- Department of Biotechnology, School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (N.S.); (M.B.); (P.P.); (S.S.); (K.S.S.)
| | - Emilin R. Renitta
- Department of Food Processing Technology, School of Agriculture and Biosciences, Karunya Institute of Science and Technology, Karunya Nagar, Coimbatore, 641114, Tamil Nadu, India;
| | - P. Senthilkumar
- Department of Chemical Engineering, School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India;
| | - Suresh S. Kumar
- Centre for Materials Engineering and Regenerative Medicine, Bharath Institute of Higher Education and Research, Chennai 600126, Tamil Nadu, India
| | - S. Abirami
- Department of Microbiology, Kamaraj College, Thoothukudi 628003, Tamil Nadu, India;
| | - S. Dhiva
- Department of Microbiology, Sree Narayana College, Alathur, Palakkad 678682, Kerala, India;
| | - M. Bavanilatha
- Department of Biotechnology, School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (N.S.); (M.B.); (P.P.); (S.S.); (K.S.S.)
| | - P. Prakash
- Department of Biotechnology, School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (N.S.); (M.B.); (P.P.); (S.S.); (K.S.S.)
| | - S. Saigeetha
- Department of Biotechnology, School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (N.S.); (M.B.); (P.P.); (S.S.); (K.S.S.)
| | - Krithika S. Shree
- Department of Biotechnology, School of Bio and Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (N.S.); (M.B.); (P.P.); (S.S.); (K.S.S.)
| | - R. Thirumurugan
- Department of Transfusion Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry 605006, India;
| |
Collapse
|
4
|
Rathore DS, Singh SP. Kinetics of growth and co-production of amylase and protease in novel marine actinomycete, Streptomyces lopnurensis KaM5. Folia Microbiol (Praha) 2021; 66:303-316. [PMID: 33404954 DOI: 10.1007/s12223-020-00843-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 12/07/2020] [Indexed: 12/29/2022]
Abstract
Amylases and proteases are among the industrially most important enzymes for food processing, animal feed, brewing, starch processing, detergents, healthcare, leather processing, and biofuel production. In this study, we investigated the growth kinetics and statistically optimized the co-production of amylase and protease in a phylogenetically novel haloalkaliphilic actinomycete, Streptomyces lopnurensis KaM5 of seawater. The Plackett-Berman design using Minitab 14.0 software was employed to assess the impact of the nutritional factors, temperature, pH, and incubation time. Further, starch, yeast extract, NaCl concentrations, and incubation time were optimized by Box-Behnken design at their three levels. The Pareto charts, contour, surface plots, and individual factorial analysis expressed the variability and levels for the optimal enzyme production. ANOVA analysis admitted the statistical fitness and significance level among the variables. A two-fold increase in enzyme production was achieved by cost-effective co-production media. The study was further extended to growth kinetics associated with enzyme production. Specific growth rate (μ), maximal cell mass (Xmax), volumetric product formation (Pmax), rate of product formation (Qp), and generation time (g) were computed and analyzed. These parameters significantly improved when compared with the pre-optimized conditions, and the production economics of the enzyme was industrially viable. The initial studies on the characteristics of the enzymes suggested its ability to function under the combination of alkaline pH and high salt concentrations. The co-production of enzymes from extremophiles can be a potentially viable option for large-scale production and applications.
Collapse
Affiliation(s)
- Dalip Singh Rathore
- UGC-CAS Department of Biosciences, Saurashtra University, Rajkot, Gujarat, India
| | - Satya P Singh
- UGC-CAS Department of Biosciences, Saurashtra University, Rajkot, Gujarat, India.
| |
Collapse
|
5
|
Ideal Feedstock and Fermentation Process Improvements for the Production of Lignocellulolytic Enzymes. Processes (Basel) 2020. [DOI: 10.3390/pr9010038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The usage of lignocellulosic biomass in energy production for biofuels and other value-added products can extensively decrease the carbon footprint of current and future energy sectors. However, the infrastructure in the processing of lignocellulosic biomass is not well-established as compared to the fossil fuel industry. One of the bottlenecks is the production of the lignocellulolytic enzymes. These enzymes are produced by different fungal and bacterial species for degradation of the lignocellulosic biomass into its reactive fibers, which can then be converted to biofuel. The selection of an ideal feedstock for the lignocellulolytic enzyme production is one of the most studied aspects of lignocellulolytic enzyme production. Similarly, the fermentation enhancement strategies for different fermentation variables and modes are also the focuses of researchers. The implementation of fermentation enhancement strategies such as optimization of culture parameters (pH, temperature, agitation, incubation time, etc.) and the media nutrient amendment can increase the lignocellulolytic enzyme production significantly. Therefore, this review paper summarized these strategies and feedstock characteristics required for hydrolytic enzyme production with a special focus on the characteristics of an ideal feedstock to be utilized for the production of such enzymes on industrial scales.
Collapse
|
6
|
Chandra P, Enespa, Singh R, Arora PK. Microbial lipases and their industrial applications: a comprehensive review. Microb Cell Fact 2020; 19:169. [PMID: 32847584 PMCID: PMC7449042 DOI: 10.1186/s12934-020-01428-8] [Citation(s) in RCA: 233] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/17/2020] [Indexed: 12/12/2022] Open
Abstract
Lipases are very versatile enzymes, and produced the attention of the several industrial processes. Lipase can be achieved from several sources, animal, vegetable, and microbiological. The uses of microbial lipase market is estimated to be USD 425.0 Million in 2018 and it is projected to reach USD 590.2 Million by 2023, growing at a CAGR of 6.8% from 2018. Microbial lipases (EC 3.1.1.3) catalyze the hydrolysis of long chain triglycerides. The microbial origins of lipase enzymes are logically dynamic and proficient also have an extensive range of industrial uses with the manufacturing of altered molecules. The unique lipase (triacylglycerol acyl hydrolase) enzymes catalyzed the hydrolysis, esterification and alcoholysis reactions. Immobilization has made the use of microbial lipases accomplish its best performance and hence suitable for several reactions and need to enhance aroma to the immobilization processes. Immobilized enzymes depend on the immobilization technique and the carrier type. The choice of the carrier concerns usually the biocompatibility, chemical and thermal stability, and insolubility under reaction conditions, capability of easy rejuvenation and reusability, as well as cost proficiency. Bacillus spp., Achromobacter spp., Alcaligenes spp., Arthrobacter spp., Pseudomonos spp., of bacteria and Penicillium spp., Fusarium spp., Aspergillus spp., of fungi are screened large scale for lipase production. Lipases as multipurpose biological catalyst has given a favorable vision in meeting the needs for several industries such as biodiesel, foods and drinks, leather, textile, detergents, pharmaceuticals and medicals. This review represents a discussion on microbial sources of lipases, immobilization methods increased productivity at market profitability and reduce logistical liability on the environment and user.
Collapse
Affiliation(s)
- Prem Chandra
- Food Microbiology & Toxicology, Department of Microbiology, School for Biomedical and Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University (A Central) University, Lucknow, Uttar Pradesh 226025 India
| | - Enespa
- Department of Plant Pathology, School for Agriculture, SMPDC, University of Lucknow, Lucknow, 226007 U.P. India
| | - Ranjan Singh
- Department of Environmental Science, School for Environmental Science, Babasaheb Bhimrao Ambedkar University (A Central) University, Lucknow, U.P. India
| | - Pankaj Kumar Arora
- Department of Microbiology, School for Biomedical and Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University (A Central) University, Lucknow, U.P. India
| |
Collapse
|
7
|
Jiang L, Fu H, Yang HK, Xu W, Wang J, Yang ST. Butyric acid: Applications and recent advances in its bioproduction. Biotechnol Adv 2018; 36:2101-2117. [PMID: 30266343 DOI: 10.1016/j.biotechadv.2018.09.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 12/20/2022]
Abstract
Butyric acid is an important C4 organic acid with broad applications. It is currently produced by chemosynthesis from petroleum-based feedstocks. However, the fermentative production of butyric acid from renewable feedstocks has received growing attention because of consumer demand for green products and natural ingredients in foods, pharmaceuticals, animal feed supplements, and cosmetics. In this review, strategies for improving microbial butyric acid production, including strain engineering and novel fermentation process development are discussed and compared regarding product yield, titer, purity and productivity. Future perspectives on strain and process improvements for butyric acid production are also discussed.
Collapse
Affiliation(s)
- Ling Jiang
- School of Biology & Biological Engineering, South China University of Technology, Guangzhou 510006, China; College of Food Science and Light Industry, Nanjing Tech University, No. 5 Xinmofan Road, Nanjing 210009, China
| | - Hongxin Fu
- School of Biology & Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Hopen K Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Wei Xu
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA; School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Jufang Wang
- School of Biology & Biological Engineering, South China University of Technology, Guangzhou 510006, China; Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA.
| | - Shang-Tian Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA.
| |
Collapse
|
8
|
Effects of Reduced and Enhanced Glycogen Pools on Salt-Induced Sucrose Production in a Sucrose-Secreting Strain of Synechococcus elongatus PCC 7942. Appl Environ Microbiol 2018; 84:AEM.02023-17. [PMID: 29101204 DOI: 10.1128/aem.02023-17] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/26/2017] [Indexed: 11/20/2022] Open
Abstract
Sucrose and glycogen syntheses in cyanobacteria share the common precursor glucose-1-phosphate. It is generally assumed that lowering glycogen synthesis could drive more carbon toward sucrose synthesis that can be induced by salt stress among cyanobacteria. By using a theophylline-dependent riboswitch system, the expression of glgC, a key gene in glycogen synthesis, was downregulated in a quantitative manner in a sucrose-secreting strain of Synechococcus elongatus PCC 7942. We observed that the stepwise suppression of glycogen synthesis limited rather than stimulated sucrose production in the salt-stressed cells, suggesting that glycogen could serve as a carbon pool for the synthesis of sucrose. Accordingly, we generated glycogen-overproducing strains, but the increased glycogen pool alone did not stimulate sucrose production, indicating that alternative steps limit the carbon flux toward the synthesis of sucrose. Consistent with previous studies that showed that sucrose-phosphate synthase (SPS) catalyzes the rate-limiting step in sucrose synthesis, the combination of glycogen overproduction and sps overexpression resulted in increased sucrose production. Our results indicate that the glycogen and sucrose pools are closely linked in Synechococcus elongatus PCC 7942, and we propose that enhancing the glycogen pool could be a promising strategy for the improvement of sucrose production by cyanobacteria in the presence of a strong sucrose synthesis sink.IMPORTANCE Many cyanobacteria naturally synthesize and accumulate sucrose when stressed by NaCl, which provides novel possibilities for obtaining sugar feedstock by engineering of cyanobacteria. It has been assumed that glycogen synthesis competes with sucrose synthesis for the carbon flux. However, our results showed that the suppression of glycogen synthesis decreased rather than stimulated sucrose production in a sucrose-secreting strain of Synechococcus elongatus PCC 7942. This result suggests that glycogen could serve as a supportive rather than a competitive carbon pool for the synthesis of sucrose, providing new insights about the relation between glycogen synthesis and sucrose synthesis in cyanobacteria. This finding is also useful to guide metabolic engineering work to optimize the production of sucrose and possibly other products by cyanobacteria.
Collapse
|
9
|
Chang CW, Webb C. Production of a generic microbial feedstock for lignocellulose biorefineries through sequential bioprocessing. BIORESOURCE TECHNOLOGY 2017; 227:35-43. [PMID: 28013134 DOI: 10.1016/j.biortech.2016.12.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/14/2016] [Accepted: 12/15/2016] [Indexed: 06/06/2023]
Abstract
Lignocellulosic materials, mostly from agricultural and forestry residues, provide a potential renewable resource for sustainable biorefineries. Reducing sugars can be produced only after a pre-treatment stage, which normally involves chemicals but can be biological. In this case, two steps are usually necessary: solid-state cultivation of fungi for deconstruction, followed by enzymatic hydrolysis using cellulolytic enzymes. In this research, the utilisation of solid-state bioprocessing using the fungus Trichoderma longibrachiatum was implemented as a simultaneous microbial pretreatment and in-situ enzyme production method for fungal autolysis and further enzyme hydrolysis of fermented solids. Suspending the fermented solids in water at 50°C led to the highest hydrolysis yields of 226mg/g reducing sugar and 7.7mg/g free amino nitrogen (FAN). The resultant feedstock was shown to be suitable for the production of various products including ethanol.
Collapse
Affiliation(s)
- Chen-Wei Chang
- School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Colin Webb
- School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
| |
Collapse
|
10
|
Tsouko E, Kachrimanidou V, dos Santos AF, do Nascimento Vitorino Lima ME, Papanikolaou S, de Castro AM, Freire DMG, Koutinas AA. Valorization of By-Products from Palm Oil Mills for the Production of Generic Fermentation Media for Microbial Oil Synthesis. Appl Biochem Biotechnol 2016; 181:1241-1256. [DOI: 10.1007/s12010-016-2281-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/04/2016] [Indexed: 10/20/2022]
|
11
|
Wei H, Junhong T, Yongfeng L. Utilization of food waste for fermentative hydrogen production. PHYSICAL SCIENCES REVIEWS 2016. [DOI: 10.1515/psr-2016-0050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
12
|
Proton catalysis with active carbons and partially pyrolyzed carbonaceous materials. CHINESE JOURNAL OF CATALYSIS 2014. [DOI: 10.1016/s1872-2067(14)60147-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
13
|
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]
|
14
|
Enhanced ethanol and chitosan production from wheat straw by Mucor indicus with minimal nutrient consumption. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.07.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
15
|
Combination of wet disk milling and hydrogen peroxide treatments for enhancing saccharification of sugarcane bagasse. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2012.07.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
16
|
|
17
|
Castilho LR, Mitchell DA, Freire DMG. Production of polyhydroxyalkanoates (PHAs) from waste materials and by-products by submerged and solid-state fermentation. BIORESOURCE TECHNOLOGY 2009; 100:5996-6009. [PMID: 19581084 DOI: 10.1016/j.biortech.2009.03.088] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Revised: 03/16/2009] [Accepted: 03/16/2009] [Indexed: 05/08/2023]
Abstract
Polyhydroxyalkanoates are biodegradable polymers produced by prokaryotic organisms from renewable resources. The production of PHAs by submerged fermentation processes has been intensively studied over the last 30 years. In recent years, alternative strategies have been proposed, such as the use of solid-state fermentation or the production of PHAs in transgenic plants. This paper gives an overview of submerged and solid-state fermentation processes used to produce PHAs from waste materials and by-products. The use of these low-cost raw materials has the potential to reduce PHA production costs, because the raw material costs contribute a significant part of production costs in traditional PHA production processes.
Collapse
Affiliation(s)
- Leda R Castilho
- Federal University of Rio de Janeiro, COPPE, Chemical Engineering Program, Caixa Postal 68502, 21941-972 Rio de Janeiro/RJ, Brazil.
| | | | | |
Collapse
|
18
|
Yun C, Kim Y, Park J, Park S. Optimal procurement and operational planning for risk management of an integrated biorefinery process. Chem Eng Res Des 2009. [DOI: 10.1016/j.cherd.2009.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
19
|
Satakarni M, Koutinas AA, Webb C, Curtis R. Enrichment of fermentation media and optimization of expression conditions for the production of EAK(16) peptide as fusions with SUMO. Biotechnol Bioeng 2009; 102:725-35. [PMID: 18973282 DOI: 10.1002/bit.22114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
EAK(16) (AEAEAKAKAEAKAEAK) belongs to a novel class of self-assembling peptides, which is being investigated in research and industry. SUMO belongs to the ubiquitin class of proteins and is a promising fusion partner currently in use. In this study, EAK(16) peptide fusions with hexa-histidine tagged SUMO have been constructed using Escherichia coli based pET expression vector. Intracellular expression of the SUMO-EAK(16) fusion using LB media has been optimized. Low-cost complex media (fungal autolysates, wheat and gluten hydrolysates) produced via a novel wheat-based biorefinery have been used as alternative fermentation media to LB. Shake flask cultures using either enriched LB or complex wheat-derived media containing 2 g/L of glucose resulted in intracellular SUMO-EAK(16) fusion protein production of approximately 250 mg/L fermentation volume which corresponded to 30-35% of the total bacterial protein expressed being the fusion protein. Fusion protein productivities up to five times higher were achieved when using a bioreactor.
Collapse
Affiliation(s)
- Makkapati Satakarni
- School of Chemical Engineering and Analytical Science, The University of Manchester, PO Box 88, Manchester M601QD, United Kingdom
| | | | | | | |
Collapse
|
20
|
Botella C, Diaz AB, Wang R, Koutinas A, Webb C. Particulate bioprocessing: A novel process strategy for biorefineries. Process Biochem 2009. [DOI: 10.1016/j.procbio.2009.01.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
21
|
Development of novel wheat biorefining: Effect of gluten extraction from wheat on bioethanol production. Biochem Eng J 2009. [DOI: 10.1016/j.bej.2008.09.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
22
|
|
23
|
Cardona CA, Sánchez OJ. Fuel ethanol production: process design trends and integration opportunities. BIORESOURCE TECHNOLOGY 2007; 98:2415-57. [PMID: 17336061 DOI: 10.1016/j.biortech.2007.01.002] [Citation(s) in RCA: 319] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2006] [Revised: 01/04/2007] [Accepted: 01/04/2007] [Indexed: 05/11/2023]
Abstract
Current fuel ethanol research and development deals with process engineering trends for improving biotechnological production of ethanol. In this work, the key role that process design plays during the development of cost-effective technologies is recognized through the analysis of major trends in process synthesis, modeling, simulation and optimization related to ethanol production. Main directions in techno-economical evaluation of fuel ethanol processes are described as well as some prospecting configurations. The most promising alternatives for compensating ethanol production costs by the generation of valuable co-products are analyzed. Opportunities for integration of fuel ethanol production processes and their implications are underlined. Main ways of process intensification through reaction-reaction, reaction-separation and separation-separation processes are analyzed in the case of bioethanol production. Some examples of energy integration during ethanol production are also highlighted. Finally, some concluding considerations on current and future research tendencies in fuel ethanol production regarding process design and integration are presented.
Collapse
Affiliation(s)
- Carlos A Cardona
- Department of Chemical Engineering, National University of Colombia at Manizales, Cra. 27 No. 64-60 Of. F-505, Manizales, Caldas, Colombia.
| | | |
Collapse
|
24
|
Du C, Lin SKC, Koutinas A, Wang R, Webb C. Succinic acid production from wheat using a biorefining strategy. Appl Microbiol Biotechnol 2007; 76:1263-70. [PMID: 17653539 DOI: 10.1007/s00253-007-1113-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Revised: 07/03/2007] [Accepted: 07/04/2007] [Indexed: 10/23/2022]
Abstract
The biosynthesis of succinic acid from wheat flour was investigated in a two-stage bio-process. In the first stage, wheat flour was converted into a generic microbial feedstock either by fungal fermentation alone or by combining fungal fermentation for enzyme and fungal bio-mass production with subsequent flour hydrolysis and fungal autolysis. In the second stage, the generic feedstock was converted into succinic acid by bacterial fermentation by Actinobacillus succinogenes. Direct fermentation of the generic feedstock produced by fungal fermentation alone resulted in a lower succinic acid production, probably due to the low glucose and nitrogen concentrations in the fungal broth filtrate. In the second feedstock production strategy, flour hydrolysis conducted by mixing fungal broth filtrate with wheat flour generated a glucose-rich stream, while the fungal bio-mass was subjected to autolysis for the production of a nutrient-rich stream. The possibility of replacing a commercial semi-defined medium by these two streams was investigated sequentially. A. succinogenes fermentation using only the wheat-derived feedstock resulted in a succinic acid concentration of almost 16 g l(-1) with an overall yield of 0.19 g succinic acid per g wheat flour. These results show that a wheat-based bio-refinery employing coupled fungal fermentation and subsequent flour hydrolysis and fungal autolysis can lead to a bacterial feedstock for the efficient production of succinic acid.
Collapse
Affiliation(s)
- Chenyu Du
- Satake Centre for Grain Process Engineering, School of Chemical Engineering and Analytical Science, The University of Manchester, P.O. Box 88, Manchester M60 1QD, UK
| | | | | | | | | |
Collapse
|
25
|
Polyhydroxybutyrate production from a novel feedstock derived from a wheat-based biorefinery. Enzyme Microb Technol 2007. [DOI: 10.1016/j.enzmictec.2006.08.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
26
|
Turner P, Mamo G, Karlsson EN. Potential and utilization of thermophiles and thermostable enzymes in biorefining. Microb Cell Fact 2007; 6:9. [PMID: 17359551 PMCID: PMC1851020 DOI: 10.1186/1475-2859-6-9] [Citation(s) in RCA: 317] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Accepted: 03/15/2007] [Indexed: 11/10/2022] Open
Abstract
In today's world, there is an increasing trend towards the use of renewable, cheap and readily available biomass in the production of a wide variety of fine and bulk chemicals in different biorefineries. Biorefineries utilize the activities of microbial cells and their enzymes to convert biomass into target products. Many of these processes require enzymes which are operationally stable at high temperature thus allowing e.g. easy mixing, better substrate solubility, high mass transfer rate, and lowered risk of contamination. Thermophiles have often been proposed as sources of industrially relevant thermostable enzymes. Here we discuss existing and potential applications of thermophiles and thermostable enzymes with focus on conversion of carbohydrate containing raw materials. Their importance in biorefineries is explained using examples of lignocellulose and starch conversions to desired products. Strategies that enhance thermostablity of enzymes both in vivo and in vitro are also assessed. Moreover, this review deals with efforts made on developing vectors for expressing recombinant enzymes in thermophilic hosts.
Collapse
Affiliation(s)
- Pernilla Turner
- Dept Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Gashaw Mamo
- Dept Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Eva Nordberg Karlsson
- Dept Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| |
Collapse
|
27
|
Koutinas AA, Malbranque F, Wang R, Campbell GM, Webb C. Development of an oat-based biorefinery for the production of L(+)-lactic acid by Rhizopus oryzae and various value-added coproducts. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:1755-61. [PMID: 17288441 DOI: 10.1021/jf0627120] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A novel oat-based biorefinery producing L(+)-lactic acid and various value-added coproducts (e.g., beta-glucan, anti-irritant solution) is proposed. Pearling is employed for sequential separation of bran-rich fractions for the extraction of value-added coproducts. Lactic acid production is achieved via fungal fermentation of Rhizopus oryzae on pearled oat flour. Maximum lactic acid concentration (51.7 g/L) and starch conversion yield (0.68 g/g) were achieved when an oat flour concentration of 116.5 g/L was used. Oxygen transfer played a significant role with respect to lactic acid production and starch conversion yield. Rhizopus oryzae produced a range of enzymes (glucoamylase, protease, phosphatase) for the hydrolysis of cereal flour macromolecules. Enzyme production during fungal fermentation has been reported. The proposed biorefining strategy could lead to significant operating cost reduction as compared to current industrial practices for lactic acid production from pure glucose achieved by bacterial fermentations.
Collapse
Affiliation(s)
- Apostolis A Koutinas
- Satake Centre for Grain Process Engineering, School of Chemical Engineering and Analytical Science, The University of Manchester, PO Box 88, Manchester, M60 1QD, United Kingdom.
| | | | | | | | | |
Collapse
|
28
|
Koutinas AA, Arifeen N, Wang R, Webb C. Cereal-based biorefinery development: Integrated enzyme production for cereal flour hydrolysis. Biotechnol Bioeng 2007; 97:61-72. [PMID: 17009318 DOI: 10.1002/bit.21206] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Restructuring the traditional fermentation industry into viable biorefineries for the production of fuels, chemicals and plastics is essential in order to replace (petro)chemical processing. This work presents engineering aspects of Aspergillus awamori submerged fermentation for on-site production of an enzymatic consortium that contains glucoamylase, protease and phosphatase. The crude broth filtrate was used for the production of wheat flour hydrolysates. Improvements on traditional starch hydrolysis carried out in two stages (liquefaction and saccharification) were attempted through integration of unit operations and reduction of processing temperature and reaction duration. An initial increase of temperature to 68 degrees C and a subsequent decrease to 60 degrees C for the rest of the enzymatic hydrolysis resulted in a starch to glucose conversion yield of 94 and 92% when a wheat flour concentration and commercial starch concentration of 225 g L(-1) was used, respectively. The use of crude broth filtrates resulted in the simultaneous hydrolysis of wheat protein and phytic acid, as was indicated by the increase in free amino nitrogen and phosphorus concentration, respectively.
Collapse
Affiliation(s)
- A A Koutinas
- Satake Centre for Grain Process Engineering, School of Chemical Engineering and Analytical Science, The University of Manchester, PO Box 88, Manchester, M60 1QD, United Kingdom
| | | | | | | |
Collapse
|
29
|
Arifeen N, Wang R, Kookos I, Webb C, Koutinas AA. Optimization and Cost Estimation of Novel Wheat Biorefining for Continuous Production of Fermentation Feedstock. Biotechnol Prog 2007. [DOI: 10.1002/bp0700408] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
30
|
Dixon RA, Gang DR, Charlton AJ, Fiehn O, Kuiper HA, Reynolds TL, Tjeerdema RS, Jeffery EH, German JB, Ridley WP, Seiber JN. Applications of metabolomics in agriculture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:8984-94. [PMID: 17117782 DOI: 10.1021/jf061218t] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Biological systems are exceedingly complex. The unraveling of the genome in plants and humans revealed fewer than the anticipated number of genes. Therefore, other processes such as the regulation of gene expression, the action of gene products, and the metabolic networks resulting from catalytic proteins must make fundamental contributions to the remarkable diversity inherent in living systems. Metabolomics is a relatively new approach aimed at improved understanding of these metabolic networks and the subsequent biochemical composition of plants and other biological organisms. Analytical tools within metabolomics including mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy can profile the impact of time, stress, nutritional status, and environmental perturbation on hundreds of metabolites simultaneously resulting in massive, complex data sets. This information, in combination with transcriptomics and proteomics, has the potential to generate a more complete picture of the composition of food and feed products, to optimize crop trait development, and to enhance diet and health. Selected presentations from an American Chemical Society symposium held in March 2005 have been assembled to highlight the emerging application of metabolomics in agriculture.
Collapse
Affiliation(s)
- Richard A Dixon
- Plant Biology Division, Samuel Roberts Noble Foundation, 2510 Sam Noble Parkway, Ardmore, OK 73401, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Pallos FM, Robertson GH, Pavlath AE, Orts WJ. Thermoformed wheat gluten biopolymers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:349-52. [PMID: 16417290 DOI: 10.1021/jf051035r] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The quantity of available wheat gluten exceeds the current food use markets. Thermoforming is an alternative technical means for transforming wheat gluten. Thermoforming was applied here to wheat gluten under chemically reductive conditions to form pliable, translucent sheets. A wide variety of conditions, i.e., temperature, reducing agents, plasticizers and additives were tested to obtain a range of elastic properties in the thermoformed sheets. These properties were compared to those of commercially available polymers, such as polypropylene. Elasticity of the gluten formulations were indexed by Young's modulus and were in the range measured for commercial products when tested in the 30-70% relative humidity range. Removal of the gliadin subfraction of gluten yielded polymers with higher Young's modulus since this component acts as a polymer-chain terminator. At relative humidity less than 30% all whole gluten-based sheets were brittle, while above 70% they were highly elastic.
Collapse
Affiliation(s)
- Ferenc M Pallos
- Western Regional Research Center, Pacific West Area, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, California 94710, USA
| | | | | | | |
Collapse
|
32
|
Robertson GH, Wong DWS, Lee CC, Wagschal K, Smith MR, Orts WJ. Native or raw starch digestion: a key step in energy efficient biorefining of grain. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:353-65. [PMID: 16417291 DOI: 10.1021/jf051883m] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Improved molecular disassembly and depolymerization of grain starch to glucose are key to reducing energy use in the bioconversion of glucose to chemicals, ingredients, and fuels. In fuel ethanol production, these biorefining steps use 10-20% of the energy content of the fuel ethanol. The need to minimize energy use and to raise the net yield of energy can be met by replacing high-temperature, liquid-phase, enzymatic digestion with low temperature, solid-phase, enzymatic digestion. Also called cold hydrolysis, the approach is a step toward a "green" method for the production of fuel ethanol. There has been substantial prior and increased recent interest in this approach that is presented in this first review of the subject. We include incentives, developmental research, fundamental factors of raw starch digestion, and novel approaches in enzymology and processing. The discussion draws on resources found in enzymology, engineering, plant physiology, cereal chemistry, and kinetics.
Collapse
Affiliation(s)
- George H Robertson
- Western Regional Research Center, Agricultural Research Service/Pacific West Area, U.S. Department of Agriculture, 800 Buchanan Street, Albany, California 94710, USA.
| | | | | | | | | | | |
Collapse
|
33
|
Koutinas A, Wang RH, Webb C. Development of a process for the production of nutrient supplements for fermentations based on fungal autolysis. Enzyme Microb Technol 2005. [DOI: 10.1016/j.enzmictec.2004.01.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|