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Hammami K, Souissi Y, Souii A, Gorrab A, Hassen W, Chouchane H, Masmoudi AS, Cherif A, Neifar M. Pseudomonas rhizophila S211 as a microbial cell factory for direct bioconversion of waste cooking oil into medium-chain-length polyhydroxyalkanoates. 3 Biotech 2024; 14:207. [PMID: 39184912 PMCID: PMC11341804 DOI: 10.1007/s13205-024-04048-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 08/08/2024] [Indexed: 08/27/2024] Open
Abstract
The present study examines the use of waste cooking oil (WCO) as a substrate for medium-chain-length polyhydroxyalkanoates (mcl-PHA) production by Pseudomonas rhizophila S211. The genome analysis revealed that the S211 strain has a mcl-PHA cluster (phaC1ZC2DFI) encoding two class II PHA synthases (PhaC1 and PhaC2) separated by a PHA depolymerase (PhaZ), a transcriptional activator (PhaD) and two phasin-like proteins (PhaFI). Genomic annotation also identified a gene encoding family I.3 lipase that was able to hydrolyze plant oils and generate fatty acids as favorable carbon sources for cell growth and PHA synthesis via β-oxidation pathway. Using a three-variable Doehlert experimental design, the optimum conditions for mcl-PHA accumulation were achieved in 10% of WCO-based medium with an inoculum size of 10% and an incubation period of 48 h at 30 °C. The experimental yield of PHA from WCO was 1.8 g/L close to the predicted yield of 1.68 ± 0.14 g/L. Moreover, 1H nuclear magnetic resonance spectroscopy analysis confirmed the extracted mcl-PHA. Overall, this study describes P. rhizophila as a cell factory for biosynthesis of biodegradable plastics and proposes green and efficient approach to cooking oil waste management by decreasing the cost of mcl-PHA production, which can help reduce the dependence on petroleum-based plastics.
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Affiliation(s)
- Khouloud Hammami
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
| | - Yasmine Souissi
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
- Department of Engineering, German University of Technology in Oman, Muscat, Oman
| | - Amal Souii
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
| | - Afwa Gorrab
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
| | - Wafa Hassen
- Research Unit of Analysis and Process Applied on the Environmental-APAE UR17ES32, Higher Institute of Applied Sciences and Technology Mahdia “ISSAT”, University of Monastir, 5100 Mahdia, Tunisia
| | - Habib Chouchane
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
| | - Ahmed Slaheddine Masmoudi
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
| | - Ameur Cherif
- BVBGR-LR11ES31, Higher Institute of Biotechnology of Sidi Thabet (ISBST), University of Manouba, Ariana, Tunisia
| | - Mohamed Neifar
- APVA-LR16ES20, National School of Engineers of Sfax (ENIS), University of Sfax, Sfax, Tunisia
- Common Services Unit “Bioreactor Coupled With an Ultrafilter”, ENIS, University of Sfax, 3030 Sfax, Tunisia
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An X, Xu Y, Dai X. Biohythane production from two-stage anaerobic digestion of food waste: A review. J Environ Sci (China) 2024; 139:334-349. [PMID: 38105059 DOI: 10.1016/j.jes.2023.04.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 12/19/2023]
Abstract
The biotransformation of food waste (FW) to bioenergy has attracted considerable research attention as a means to address the energy crisis and waste disposal problems. To this end, a promising technique is two-stage anaerobic digestion (TSAD), in which the FW is transformed to biohythane, a gaseous mixture of biomethane and biohydrogen. This review summarises the main characteristics of FW and describes the basic principle of TSAD. Moreover, the factors influencing the TSAD performance are identified, and an overview of the research status; economic aspects; and strategies such as pre-treatment, co-digestion, and regulation of microbial consortia to increase the biohythane yield from TSAD is provided. Additionally, the challenges and future considerations associated with the treatment of FW by TSAD are highlighted. This paper can provide valuable reference for the improvement and widespread implementation of TSAD-based FW treatment.
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Affiliation(s)
- Xiaona An
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Ying Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
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Boey JY, Kong U, Lee CK, Lim GK, Oo CW, Tan CK, Ng CY, Azniwati AA, Tay GS. The effect of spent coffee ground (SCG) loading, matrix ratio and biological treatment of SCG on poly(hydroxybutyrate) (PHB)/poly(lactic acid) (PLA) polymer blend. Int J Biol Macromol 2024; 266:131079. [PMID: 38537860 DOI: 10.1016/j.ijbiomac.2024.131079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 03/11/2024] [Accepted: 03/20/2024] [Indexed: 04/06/2024]
Abstract
This study investigates the effects of SCG embedded into biodegradable polymer blends and aimed to formulate and characterise biomass-reinforced biocomposites using spent coffee ground (SCG) as reinforcement in PHB/PLA polymer blend. The effect of SCG filler loading and varying PHB/PLA ratios on the tensile properties and morphological characteristics of the biocomposites were examined. The results indicated that tensile properties reduction could be due to its incompatibility with the PHB/PLA matrixSCG aggregation at 40 wt% content resulted in higher void formation compared to lower content at 10 wt%. A PHB/PLA ratio of 50/50 with SCG loading 20 wt% was chosen for biocomposites with treated SCG. Biological treatment of SCG using Phanerochaete chrysosporium CK01 and Aspergillus niger DWA8 indicated P. chrysosporium CK01 necessitated a higher moisture content for optimum growth and enzyme production, whereas the optimal conditions for enzyme production (50-55 %, w/w) differed from those promoting A. niger DWA8 growth (40 %, w/w). SEM micrographs highlighted uniform distribution and effective wetting of treated SCG, resulting in improvements of tensile strength and modulus of biocomposites, respectively. The study demonstrated the effectiveness of sustainable fungal treatment in enhancing the interfacial adhesion between treated SCG and the PHB/PLA matrix.
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Affiliation(s)
- J Y Boey
- School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - U Kong
- School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - C K Lee
- School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - G K Lim
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - C W Oo
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - C K Tan
- PMI Packaging Sdn. Bhd., Taman Perindustrian Senai, 81400 Senai, Johor, Malaysia
| | - C Y Ng
- CY Enterprise Sdn. Bhd., Taman Perindustrian Murni, 81400 Senai, Johor, Malaysia
| | - A A Azniwati
- School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - G S Tay
- School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
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Abdelrahman SA, Barakat OS, Ahmed MN. Genetic characterization of a novel Salinicola salarius isolate applied for the bioconversion of agro-industrial wastes into polyhydroxybutyrate. Microb Cell Fact 2024; 23:56. [PMID: 38368375 PMCID: PMC10874550 DOI: 10.1186/s12934-024-02326-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/05/2024] [Indexed: 02/19/2024] Open
Abstract
BACKGROUND Polyhydroxybutyrate (PHB) has emerged as a promising eco-friendly alternative to traditional petrochemical-based plastics. In the present study, we isolated and characterized a new strain of Salinicola salarius, a halophilic bacterium, from the New Suez Canal in Egypt and characterized exclusively as a potential PHB producer. Further genome analysis of the isolated strain, ES021, was conducted to identify and elucidate the genes involved in PHB production. RESULTS Different PHB-producing marine bacteria were isolated from the New Suez Canal and characterized as PHB producers. Among the 17 bacterial isolates, Salinicola salarius ES021 strain showed the capability to accumulate the highest amount of PHB. Whole genome analysis was implemented to identify the PHB-related genes in Salinicola salarius ES021 strain. Putative genes were identified that can function as phaCAB genes to produce PHB in this strain. These genes include fadA, fabG, and P3W43_16340 (encoding acyl-CoA thioesterase II) for PHB production from glucose. Additionally, phaJ and fadB were identified as key genes involved in PHB production from fatty acids. Optimization of environmental factors such as shaking rate and incubation temperature, resulted in the highest PHB productivity when growing Salinicola salarius ES021 strain at 30°C on a shaker incubator (110 rpm) for 48 h. To maximize PHB production economically, different raw materials i.e., salted whey and sugarcane molasses were examined as cost-effective carbon sources. The PHB productivity increased two-fold (13.34 g/L) when using molasses (5% sucrose) as a fermentation media. This molasses medium was used to upscale PHB production in a 20 L stirred-tank bioreactor yielding a biomass of 25.12 g/L, and PHB of 12.88 g/L. Furthermore, the produced polymer was confirmed as PHB using Fourier-transform infrared spectroscopy (FTIR), gas chromatography-mass spectroscopy (GC-MS), and nuclear magnetic resonance spectroscopy (NMR) analyses. CONCLUSIONS Herein, Salinicola salarius ES021 strain was demonstrated as a robust natural producer of PHB from agro-industrial wastes. The detailed genome characterization of the ES021 strain presented in this study identifies potential PHB-related genes. However, further metabolic engineering is warranted to confirm the gene networks required for PHB production in this strain. Overall, this study contributes to the development of sustainable and cost-effective PHB production strategies.
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Affiliation(s)
- Shymaa A Abdelrahman
- Department of Microbiology, Faculty of Agriculture, Cairo University, El-Gamaa Street, Giza, 12613, Egypt.
| | - Olfat S Barakat
- Department of Microbiology, Faculty of Agriculture, Cairo University, El-Gamaa Street, Giza, 12613, Egypt
| | - Marwa N Ahmed
- Department of Microbiology, Faculty of Agriculture, Cairo University, El-Gamaa Street, Giza, 12613, Egypt
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Herrera DAG, Mojicevic M, Pantelic B, Joshi A, Collins C, Batista M, Torres C, Freitas F, Murray P, Nikodinovic-Runic J, Brennan Fournet M. Exploring Microorganisms from Plastic-Polluted Sites: Unveiling Plastic Degradation and PHA Production Potential. Microorganisms 2023; 11:2914. [PMID: 38138058 PMCID: PMC10745504 DOI: 10.3390/microorganisms11122914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/23/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
The exposure of microorganisms to conventional plastics is a relatively recent occurrence, affording limited time for evolutionary adaptation. As part of the EU-funded project BioICEP, this study delves into the plastic degradation potential of microorganisms isolated from sites with prolonged plastic pollution, such as plastic-polluted forests, biopolymer-contaminated soil, oil-contaminated soil, municipal landfill, but also a distinctive soil sample with plastic pieces buried three decades ago. Additionally, samples from Arthropoda species were investigated. In total, 150 strains were isolated and screened for the ability to use plastic-related substrates (Impranil dispersions, polyethylene terephthalate, terephthalic acid, and bis(2-hydroxyethyl) terephthalate). Twenty isolates selected based on their ability to grow on various substrates were identified as Streptomyces, Bacillus, Enterococcus, and Pseudomonas spp. Morphological features were recorded, and the 16S rRNA sequence was employed to construct a phylogenetic tree. Subsequent assessments unveiled that 5 out of the 20 strains displayed the capability to produce polyhydroxyalkanoates, utilizing pre-treated post-consumer PET samples. With Priestia sp. DG69 and Neobacillus sp. DG40 emerging as the most successful producers (4.14% and 3.34% of PHA, respectively), these strains are poised for further utilization in upcycling purposes, laying the foundation for the development of sustainable strategies for plastic waste management.
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Affiliation(s)
- Diana A. Garza Herrera
- PRISM Research Institute, Technological University of the Shannon Midlands Midwest, N37HD68 Athlone, Ireland; (D.A.G.H.); (M.B.F.)
| | - Marija Mojicevic
- PRISM Research Institute, Technological University of the Shannon Midlands Midwest, N37HD68 Athlone, Ireland; (D.A.G.H.); (M.B.F.)
| | - Brana Pantelic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11042 Belgrade, Serbia; (B.P.); (J.N.-R.)
| | - Akanksha Joshi
- Shannon Applied Biotechnology Centre, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland; (A.J.); (C.C.); (P.M.)
| | - Catherine Collins
- Shannon Applied Biotechnology Centre, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland; (A.J.); (C.C.); (P.M.)
| | - Maria Batista
- UCIBIO—Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2829-516 Lisbon, Portugal; (M.B.); (C.T.); (F.F.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, 2829-516 Lisbon, Portugal
| | - Cristiana Torres
- UCIBIO—Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2829-516 Lisbon, Portugal; (M.B.); (C.T.); (F.F.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, 2829-516 Lisbon, Portugal
| | - Filomena Freitas
- UCIBIO—Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2829-516 Lisbon, Portugal; (M.B.); (C.T.); (F.F.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, School of Science and Technology, NOVA University Lisbon, 2829-516 Lisbon, Portugal
| | - Patrick Murray
- Shannon Applied Biotechnology Centre, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland; (A.J.); (C.C.); (P.M.)
| | - Jasmina Nikodinovic-Runic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11042 Belgrade, Serbia; (B.P.); (J.N.-R.)
| | - Margaret Brennan Fournet
- PRISM Research Institute, Technological University of the Shannon Midlands Midwest, N37HD68 Athlone, Ireland; (D.A.G.H.); (M.B.F.)
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6
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Choi SY, Lee Y, Yu HE, Cho IJ, Kang M, Lee SY. Sustainable production and degradation of plastics using microbes. Nat Microbiol 2023; 8:2253-2276. [PMID: 38030909 DOI: 10.1038/s41564-023-01529-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
Plastics are indispensable in everyday life and industry, but the environmental impact of plastic waste on ecosystems and human health is a huge concern. Microbial biotechnology offers sustainable routes to plastic production and waste management. Bacteria and fungi can produce plastics, as well as their constituent monomers, from renewable biomass, such as crops, agricultural residues, wood and organic waste. Bacteria and fungi can also degrade plastics. We review state-of-the-art microbial technologies for sustainable production and degradation of bio-based plastics and highlight the potential contributions of microorganisms to a circular economy for plastics.
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Affiliation(s)
- So Young Choi
- Metabolic and Biomolecular Engineering National Research Laboratory, Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Institute for BioCentury, KAIST, Daejeon, Republic of Korea
- BioProcess Engineering Research Center, KAIST, Daejeon, Republic of Korea
| | - Youngjoon Lee
- Metabolic and Biomolecular Engineering National Research Laboratory, Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Institute for BioCentury, KAIST, Daejeon, Republic of Korea
- BioProcess Engineering Research Center, KAIST, Daejeon, Republic of Korea
| | - Hye Eun Yu
- Metabolic and Biomolecular Engineering National Research Laboratory, Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Institute for BioCentury, KAIST, Daejeon, Republic of Korea
| | - In Jin Cho
- Metabolic and Biomolecular Engineering National Research Laboratory, Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Institute for BioCentury, KAIST, Daejeon, Republic of Korea
- BioProcess Engineering Research Center, KAIST, Daejeon, Republic of Korea
| | - Minju Kang
- Metabolic and Biomolecular Engineering National Research Laboratory, Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
- KAIST Institute for BioCentury, KAIST, Daejeon, Republic of Korea
| | - Sang Yup Lee
- Metabolic and Biomolecular Engineering National Research Laboratory, Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
- KAIST Institute for BioCentury, KAIST, Daejeon, Republic of Korea.
- BioProcess Engineering Research Center, KAIST, Daejeon, Republic of Korea.
- BioInformatics Research Center, KAIST, Daejeon, Republic of Korea.
- Graduate School of Engineering Biology, KAIST, Daejeon, Republic of Korea.
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Pantelic L, Bogojevic SS, Vojnovic S, Oliveira R, Lazic J, Ilic-Tomic T, Milivojevic D, Nikodinovic-Runic J. Upcycling of food waste streams to valuable biopigments pyocyanin and 1-hydroxyphenazine. Enzyme Microb Technol 2023; 171:110322. [PMID: 37722241 DOI: 10.1016/j.enzmictec.2023.110322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/17/2023] [Accepted: 09/05/2023] [Indexed: 09/20/2023]
Abstract
Phenazines, including pyocyanin (PYO) and 1-hydroxyphenazine (1-HP) are extracellular secondary metabolites and multifunctional pigments of Pseudomonas aeruginosa responsible for its blue-green color. These versatile molecules are electrochemically active, involved in significant biological activities giving fitness to the host, but also recognized as antimicrobial and anticancer agents. Their wider application is still limited partly due to the cost of carbon substrate for production, which can be solved by the utilization of carbon from food waste within the biorefinery concept. In this study, a variety of food waste streams (banana peel, potato peel, potato washing, stale bread, yoghurt, processed meat, boiled eggs and mixed canteen waste) was used as sole nutrient source in submerged cultures of P. aeruginosa BK25H. Stale bread was identified as the most suitable substrate to support phenazine biopigments production and bacterial growth. This was further increased in 5-liter fermenter when on average 5.2 mg L-1 of PYO and 4.4 mg L-1 of 1-HP were purified after 24 h batch cultivations from the fermentation medium consisting of homogenized stale bread in tap water. Purified biopigments showed moderate antimicrobial activity, and showed different toxicity profiles, with PYO not being toxic against Caenorhabditis elegans, a free-living soil nematode up to 300 µg mL-1 and 1-HP showing lethal effects at 75 µg mL-1. Therefore, stale bread waste stream with minimal pretreatment should be considered as suitable biorefinery feedstock, as it can support the production of valuable biopigments such as phenazines.
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Affiliation(s)
- Lena Pantelic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia
| | - Sanja Skaro Bogojevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia
| | - Sandra Vojnovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia
| | - Rui Oliveira
- LAQV-REQUIMTE, NOVA School of Science and Technology, NOVA University Lisbon, Largo da Torre, 2829-516 Caparica, Portugal
| | - Jelena Lazic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia
| | - Tatjana Ilic-Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia
| | - Dusan Milivojevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia
| | - Jasmina Nikodinovic-Runic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia.
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Raunhan R, Jantharadej K, Mhuantong W, Chanprateep Napathorn S, Boonchayaanant Suwannasilp B. Valorization of food waste derived anaerobic digestate into polyhydroxyalkanoate (PHA) using Thauera mechernichensis TL1. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 171:248-258. [PMID: 37678073 DOI: 10.1016/j.wasman.2023.08.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/04/2023] [Accepted: 08/29/2023] [Indexed: 09/09/2023]
Abstract
Polyhydroxyalkanoate (PHA) is a biopolymer that can be used as a bioplastic, offering a green alternative to petroleum-based plastics. In this study, we investigated PHA production using Thauera mechernichensis TL1. The optimal molar C/N ratio was determined to be 20 from among the ratios of 4, 20, 40, 80, and 200 and in the absence of nitrogen. Food waste anaerobic digestate, mainly comprised of acetate and propionate, was used as the carbon source for PHA production by T. mechernichensis TL1, resulting in a maximum PHA content of 23.98 ± 0.52 wt% (0.52 ± 0.02 g/L PHA) with a PHA productivity of 0.043 g/L-h PHA. In addition, when using acetate and propionate, T. mechernichensis TL1 produced PHA with a maximum PHA content of 57.43 ± 2.84 wt% (2.04 ± 0.11 g/L PHA) and 50.94 ± 1.61 wt% (2.62 ± 0.16 g/L PHA), with a PHA productivity of 0.092 g/L-h PHA and 0.070 g/L-h PHA, respectively. Proton nuclear magnetic resonance spectroscopy (1H NMR) confirmed polyhydroxybutyrate (PHB) production using acetate as a carbon source, and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) production using propionate or food waste anaerobic digestate as the carbon source. The whole-genome analysis of T. mechernichensis TL1 confirmed the existence of a PHA biosynthesis pathway, with the presence of phaA, phaB, phaC (Class I and Class II), and phaJ genes. This study was the first to demonstrate Thauera sp.'s ability to produce PHA from food waste anaerobic digestate, rendering it as a promising candidate for PHA-producing bacteria for the valorization of food waste.
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Affiliation(s)
- Rasita Raunhan
- Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Krittayapong Jantharadej
- Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Wuttichai Mhuantong
- National Center for Genetic Engineering and Biotechnology, Enzyme Technology Research Team, Pathum Thani, Thailand
| | | | - Benjaporn Boonchayaanant Suwannasilp
- Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand; Biotechnology for Wastewater Engineering Research Unit, Chulalongkorn University, Bangkok, Thailand; Research Network of NANOTEC-CU (RNN), Bangkok, Thailand.
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9
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Zheng Y, Wang P, Wei Y, Feng Z, Jia Z, Li J, Ren L. Untargeted metabolomics elucidated biosynthesis of polyhydroxyalkanoate by mixed microbial cultures from waste activated sludge under different pH values. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 331:117300. [PMID: 36657207 DOI: 10.1016/j.jenvman.2023.117300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/03/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
Waste activated sludge has been frequently used as mixed substrate to produce polyhydroxyalkanoate (PHA). However, insufficient research on microbial metabolism has led to difficulties in regulating PHA accumulation in mixed microbial cultures (MMCs). To explore the variation of functional genes during domestication and the effect of different pH conditions on metabolic pathways during PHA accumulation, MMCs were domesticated by adding acetate and propionate with aerobic dynamic feeding strategy for 60 days. As the domestication progressed, the microbial community diversity declined and PHA-producing bacteria, Brevundimonas, Dechloromonas and Hyphomonas, were enriched. Through bacterial function prediction by PICRUSt the gene rpoE involved in starvation resistance of bacteria was enriched after the domestication. The pH value of 8.5 was the best condition for PHA accumulation in MMCs, under which a maximum PHA content reached 23.50% and hydroxybutyric (HB)/hydroxyvaleric (HV) reached 2.22. Untargeted metabolomics analysis exhibited that pH conditions of 7 and 8.5 could promote the up-regulation of significant differential metabolites, while higher alkaline conditions caused the inhibition of metabolic activity. Functional annotation showed that pH condition of 8.5 significantly affected Pyrimidine metabolism, resulting in an increase in PHA production. Regarding the pathways of PHA biosynthesis, acetoacetate was found to be significant in the metabolism of hydroxybutyric, and the alkaline condition could restrain the conversion from hydroxybutyric (HB) to the acetoacetate to protect PHB accumulation in MMCs compared with neutral condition. Taken together, the present results can advance the fundamental understanding of metabolic function in PHA accumulation under different pH conditions.
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Affiliation(s)
- Yi Zheng
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China; College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China; Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, 215128, China
| | - Pan Wang
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China.
| | - Yuquan Wei
- College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China; Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, 215128, China
| | - Ziwei Feng
- College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China
| | - Zhijie Jia
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Ji Li
- College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, Beijing, 100193, China; Organic Recycling Institute (Suzhou) of China Agricultural University, Suzhou, 215128, China
| | - Lianhai Ren
- State Environmental Protection Key Laboratory of Food Chain Pollution Control, School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China.
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10
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Hari S, Ramaswamy K, Sivalingam U, Ravi A, Dhanraj S, Jagadeesan M. Progress and prospects of biopolymers production strategies. PHYSICAL SCIENCES REVIEWS 2023. [DOI: 10.1515/psr-2022-0215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Abstract
In recent decades, biopolymers have garnered significant attention owing to their aptitude as an environmentally approachable precursor for an extensive application. In addition, due to their alluring assets and widespread use, biopolymers have made significant strides in their production based on various sources and forms. This review focuses on the most recent improvements and breakthroughs that have been made in the manufacturing of biopolymers, via sections focusing the most frequented and preferred routes like micro-macro, algae apart from focusing on microbials routes with special attention to bacteria and the synthetic biology avenue of biopolymer production. For ensuring the continued growth of the global polymer industry, promising research trends must be pursued, as well as methods for overcoming obstacles that arise in exploiting the beneficial properties exhibited by a variety of biopolymers.
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11
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Versino F, Ortega F, Monroy Y, Rivero S, López OV, García MA. Sustainable and Bio-Based Food Packaging: A Review on Past and Current Design Innovations. Foods 2023; 12:foods12051057. [PMID: 36900574 PMCID: PMC10000825 DOI: 10.3390/foods12051057] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 03/06/2023] Open
Abstract
Food loss and waste occur for many reasons, from crop processing to household leftovers. Even though some waste generation is unavoidable, a considerable amount is due to supply chain inefficiencies and damage during transport and handling. Packaging design and materials innovations represent real opportunities to reduce food waste within the supply chain. Besides, changes in people's lifestyles have increased the demand for high-quality, fresh, minimally processed, and ready-to-eat food products with extended shelf-life, that need to meet strict and constantly renewed food safety regulations. In this regard, accurate monitoring of food quality and spoilage is necessary to diminish both health hazards and food waste. Thus, this work provides an overview of the most recent advances in the investigation and development of food packaging materials and design with the aim to improve food chain sustainability. Enhanced barrier and surface properties as well as active materials for food conservation are reviewed. Likewise, the function, importance, current availability, and future trends of intelligent and smart packaging systems are presented, especially considering biobased sensor development by 3D printing technology. In addition, driving factors affecting fully biobased packaging design and materials development and production are discussed, considering byproducts and waste minimization and revalorization, recyclability, biodegradability, and other possible ends-of-life and their impact on product/package system sustainability.
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Affiliation(s)
- Florencia Versino
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ingeniería, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
- Correspondence:
| | - Florencia Ortega
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
| | - Yuliana Monroy
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
| | - Sandra Rivero
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
| | - Olivia Valeria López
- Planta Piloto de Ingeniería Química (PLAPIQUI), UNS-CONICET, Camino La Carrindanga km.7, Bahía Blanca 8000, Argentina
| | - María Alejandra García
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116, La Plata 1900, Argentina
- Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115, La Plata 1900, Argentina
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12
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Chavan S, Yadav B, Tyagi RD, Wong JWC, Drogui P. Trends and challenges in the valorization of kitchen waste to polyhydroxyalkanoates. BIORESOURCE TECHNOLOGY 2023; 369:128323. [PMID: 36400275 DOI: 10.1016/j.biortech.2022.128323] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
Kitchen waste (KW) is frequently available for free or with a negative cost due to its huge production. It contains a large proportion of organic substances, especially fermentable sugars, which can be used for bioplastic (polyhydroxyalkanoates or PHA) synthesis. Nevertheless, due to the difficulties in processing, various pre-treatments of KW are being investigated to enhance the concentration of simple sugars released during its hydrolysis. The effective use of KW will help in minimizing the issues of its inappropriate disposal. However, the review on KW to bioplastic synthesis is rarely reported in the literature. Hence, this particular review provides a comprehensive summary of the updated research developments in KW valorization and its potency as a feedstock for PHAs synthesis. Additionally, the impacts of KW, its availability, the necessary pre-treatments for the biopolymerization process, as well as the prospects and challenges for industrially generating sustainable PHAs, are critically discussed.
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Affiliation(s)
- Shraddha Chavan
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K 9A9, Canada
| | - Bhoomika Yadav
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K 9A9, Canada
| | - R D Tyagi
- BOSK-Bioproducts, 100-399 rue Jacquard, Québec (QC) G1N 4J6, Canada; School of Technology, Huzhou University, Huzhou 311800, China.
| | - Jonathan W C Wong
- Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment and Department of Biology, Hong Kong Baptist University, Hong Kong; School of Technology, Huzhou University, Huzhou 311800, China
| | - Patrick Drogui
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec G1K 9A9, Canada
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13
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Angra V, Sehgal R, Gupta R. Trends in PHA Production by Microbially Diverse and Functionally Distinct Communities. MICROBIAL ECOLOGY 2023; 85:572-585. [PMID: 35333950 DOI: 10.1007/s00248-022-01995-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Along with the wide applications of conventional plastics, they have a large number of disadvantages like their non-biodegradable nature, dependency on fossil fuels and the release of large amounts of toxic materials in the environment. Therefore, to resolve these problems, a number of bioplastics are studied, out of which polyhydroxyalkanoates are considered as the best alternatives. Polyhydroxyalkanoates (PHAs) are produced by microorganisms as intracellular granules during stressful conditions. Though a wide range of organisms can naturally produce PHAs, only a few of them can be used for commercial production. Therefore, more diverse organisms that accumulate a considerable amount of PHAs and also reduce the production cost need to be exploited. Transgenic plants, recombinant bacteria, algae and extremophiles are some diverse organisms that produce a high amount of PHAs at a low cost. So, if potential organisms are used for PHA production, bioplastics will be able to completely replace petroleum-based polymers. Therefore, our review mainly focuses on production of PHAs using potential organisms so that amount of PHAs produced is high and cost-effective which would further help in the commercialization of PHAs.
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Affiliation(s)
- Vani Angra
- Department of Biotechnology, Himachal Pradesh University, Summerhill, Shimla, 171005, India
| | - Rutika Sehgal
- Department of Biotechnology, Himachal Pradesh University, Summerhill, Shimla, 171005, India
| | - Reena Gupta
- Department of Biotechnology, Himachal Pradesh University, Summerhill, Shimla, 171005, India.
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14
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Elhami V, Hempenius MA, Schuur B. Crotonic Acid Production by Pyrolysis and Vapor Fractionation of Mixed Microbial Culture-Based Poly(3-hydroxybutyrate- co-3-hydroxyvalerate). Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Vahideh Elhami
- Sustainable Process Technology Group, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede 7522 NB, The Netherlands
| | - Mark A. Hempenius
- Sustainable Polymer Chemistry Group, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede 7522 NB, The Netherlands
| | - Boelo Schuur
- Sustainable Process Technology Group, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, Enschede 7522 NB, The Netherlands
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15
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Mohana AA, Islam MM, Rahman M, Pramanik SK, Haque N, Gao L, Pramanik BK. Generation and consequence of nano/microplastics from medical waste and household plastic during the COVID-19 pandemic. CHEMOSPHERE 2023; 311:137014. [PMID: 36328315 PMCID: PMC9619086 DOI: 10.1016/j.chemosphere.2022.137014] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 10/03/2022] [Accepted: 10/23/2022] [Indexed: 05/10/2023]
Abstract
Since the end of 2019, the world has faced a major crisis because of the outbreak of COVID-19 disease which has created a severe threat to humanity. To control this pandemic, the World Health Organization gave some guidelines like wearing PPE (personal protective equipment) (e.g., face masks, overshoes, gloves), social distancing, hand hygiene and shutting down all modes of public transport services. During this pandemic, plastic products (e.g., household plastics, PPE and sanitizer bottles) have substantially prevented the spread of this virus. Since the outbreak, approximately 1.6 million tons of plastic waste have been generated daily. However, single-use PPE like face masks (N95), surgical masks and hand gloves contain many non-biodegradable plastics materials. These abandoned products have created a huge number of plastic debris which ended up as microplastics (MPs) followed by nanoplastics (NPs) in nature that are hazardous to the eco-system. These MPs and NPs also act as vectors for the various pathogenic contaminants. The goal of this review is to offer an extensive discussion on the formation of NPs and MPs from all of these abandoned plastics and their long-term impact on the environment as well as human health. This review paper also attempts to assess the present global scenario and the main challenge of waste management to reduce the potential NP/MPs pollution to improve the eco-systems.
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Affiliation(s)
- Anika Amir Mohana
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Md Monjurul Islam
- Department of Earth Resources and Environmental Engineering, Hanyang University, South Korea
| | - Mahbubur Rahman
- Department of Civil Engineering, Chittagong University of Engineering and Technology, Chittagong, Bangladesh
| | - Sagor Kumar Pramanik
- Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
| | - Nawshad Haque
- CSIRO Mineral Resources, Clayton South, Melbourne, VIC, 3169, Australia
| | - Li Gao
- South East Water, Frankston, Victoria, 3199, Australia
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16
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Wu M, Gong X, Liu X, Tu W, Yu P, Zou Y, Wang H. Comprehensive Techno-environmental Evaluation of a Pilot-Scale PHA Production from Food Waste in China. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 57:1467-1478. [PMID: 36580666 DOI: 10.1021/acs.est.2c05976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Polyhydroxyalkanoates (PHAs), a biodegradable plastic that might replace petroleum-based plastics, can be recovered from organic waste using mixed microbial cultures (MMCs). Research in this field has been ongoing for about 25 years and is now in a critical commercialization period. However, few pilot-scale studies are available to analyze its technical feasibility and environmental impact. We ran an MMC PHA production pilot plant for 6 months using local food waste as the feedstock. The traditional three-stage process achieved PHA content of 47.91 ± 1.91% dry cell weight and volumetric productivity of 9.94 ± 0.01 g/L·d, while a novel rapid proliferation stage was built in, the PHA content and productivity could reach 41.39 ± 2.39% cell dry weight and 20.02 ± 0.01 g/L·d, respectively. Life cycle assessment using field data showed that greenhouse warming potential was much more than five times that of the known literature, and the fossil depletion potential was 10.30 (scenario #1)/7.59 (scenario #2) times higher than petroleum-based polyethylene (PE) plastic. However, establishing a resource-energy-water union instead of an isolated plant could achieve environmental benefits compared to PE plastic. This techno-environmental analysis provides emerging MMC PHA producers worldwide with a valuable reference for further development opportunities and market planning.
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Affiliation(s)
- Menghan Wu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
| | - Xiaoqiang Gong
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
| | - Xinning Liu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
| | - Weiming Tu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
| | - Peng Yu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
| | - Yina Zou
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
| | - Hui Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, 100084Beijing, China
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17
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Eco-friendly dyeing of polyamide and polyamide-elastane knits with living bacterial cultures of two Streptomyces sp. strains. World J Microbiol Biotechnol 2022; 39:32. [PMID: 36462123 DOI: 10.1007/s11274-022-03473-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/17/2022] [Indexed: 12/04/2022]
Abstract
Given the environmental burden of textile industry, especially of dyeing processes and the volume of synthetic dyes and surfactants, the intensive development of the greener approaches is under way. Herein, an environmentaly-friendly dyeing of polyamide (PA) and PA/Elastane (PA/EA) knits using live bacterial approach in water environment, completely eliminating usage of textile auxiliaries is described. A total of 12 pigment-producing Streptomyces strains were isolated and purified from soil and rizoshere or bark of smoke tree Cotinus coggygria samples. The antibacterial, antifungal and cytotoxic effects of crude bacterial extracts were tested. Antimicrobial effect was obtained by the majority of extracts but only two streptomycetes extracts, 11-5 and BPS51, showed moderate cytotoxicity against HaCaT human cell line. This was the reason to select 11-5 and BPS51 strains for the dyeing of the textile materials. Excellent properties of dyeing wool, silk and PA are achieved initially using live cultures, and the bioprocess is optimized on commercial PA and PA/EA knits used for stockings production. Satisfactory coloration of both knits is achieved with dynamic conditions (culture shaking at 180 rpm over 5-14 days at 30 ºC) giving the best coloration results, except in the case of the PA sample dyed with a bacterial strain 11-5. The prolongation of dyeing time leads to higher color yields independently of fabric and bacteria strain. Although the color differences between the samples before and after washing are observed, washing fastness after three washing cycles can be considered as satisfactory.
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18
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Piecha CR, Alves TC, Zanini MLDO, Corrêa CDPL, Leite FPL, Galli V, Diaz PS. Application of the solid-state fermentation process and its variations in PHA production: a review. Arch Microbiol 2022; 205:11. [PMID: 36460824 DOI: 10.1007/s00203-022-03336-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/25/2022] [Accepted: 11/14/2022] [Indexed: 12/04/2022]
Abstract
Solid-state fermentation (SSF) is a type of fermentation process with potential to use agro-industrial by-products as a carbon source. Nonetheless, there are few studies evaluating SSF compared to submerged fermentation (SmF) to produce polyhydroxyalkanoates (PHAs). Different methodologies are available associating the two processes. In general, the studies employ a 1st step by SSF to hydrolyze the agro-industrial by-products used as a carbon source, and a 2nd step to produce PHA that can be carried out by SmF or SSF. This paper reviewed and compared the different methodologies described in the literature to assess their potential for use in PHA production. The studies evaluated showed that highest PHA yields (86.2% and 82.3%) were achieved by associating SSF and SmF by Cupriavidus necator. Meanwhile, in methodologies using only SSF, Bacillus produced the highest yields (62% and 56.8%). Since PHA (%) does not necessarily represent a higher production by biomass, the productivity parameter was also compared between studies. We observed that the highest productivity results did not necessarily represent the highest PHA (%). C. necator presented the highest PHA yields associating SSF and SmF, however, is not the most suitable microorganism for PHA production by SSF. Concomitant use of C. necator and Bacillus is suggested for future studies in SSF. Also, it discusses the lack of studies on the association of the two fermentation methodologies, and on the scaling of SSF process for PHA production. In addition to demonstrating the need for standardization of results, for comparison between different methodologies.
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Affiliation(s)
- Camila Rios Piecha
- Bioprocess Technology Laboratory, Biotechnology, Technological Development Center, Federal University of Pelotas, RS, Zip Code 96010-90, Pelotas, Brazil.
| | - Taisha Carvalho Alves
- Center for Chemical, Pharmaceutical and Food Science, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Maria Luiza de Oliveira Zanini
- Bioprocess Technology Laboratory, Biotechnology, Technological Development Center, Federal University of Pelotas, RS, Zip Code 96010-90, Pelotas, Brazil
| | - Caroline de Paula Lopes Corrêa
- Bioprocess Technology Laboratory, Biotechnology, Technological Development Center, Federal University of Pelotas, RS, Zip Code 96010-90, Pelotas, Brazil
| | - Fábio Pereira Leivas Leite
- Bioprocess Technology Laboratory, Biotechnology, Technological Development Center, Federal University of Pelotas, RS, Zip Code 96010-90, Pelotas, Brazil
| | - Vanessa Galli
- Bioprocess Technology Laboratory, Biotechnology, Technological Development Center, Federal University of Pelotas, RS, Zip Code 96010-90, Pelotas, Brazil
| | - Patrícia Silva Diaz
- Bioprocess Technology Laboratory, Biotechnology, Technological Development Center, Federal University of Pelotas, RS, Zip Code 96010-90, Pelotas, Brazil
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19
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Process Development of Polyhydroxyalkanoates Production by Halophiles Valorising Food Waste. Bioengineering (Basel) 2022; 9:bioengineering9110630. [DOI: 10.3390/bioengineering9110630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/20/2022] [Accepted: 10/28/2022] [Indexed: 11/06/2022] Open
Abstract
Polyhydroxyalkanoates (PHA) is an emerging biodegradable plastic family that can replace a broad spectrum of conventional thermoplastics and is promising in the sustainable process development and valorization of organic waste. This study established a novel production system of PHA from food waste through halophilic microbial fermentation with spent medium recycling. The essential processing parameters for batch cultivation of Haloferax mediterranei were optimized for food waste substrate (a 40 g/L loading and 2.5 vvm of aeration), which achieved a yield of 0.3 g PHA/g COD consumed. A batch bioreactor system was developed, which produced 7.0 ± 0.7 g/L cell dry mass and 4.5 ± 0.2 g/L PHA with a 20% dissolved oxygen (DO) level. A DO above 50% saturation resulted in faster cell growth and similar cell mass production but 25% less PHA production. The spent saline medium, treated with H2O2 and rotary evaporation, was successfully reused for four consecutive batches and provided consistent PHA concentrations and product qualities.
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20
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Asunis F, Cappai G, Carucci A, De Gioannis G, Dessì P, Muntoni A, Polettini A, Pomi R, Rossi A, Spiga D, Trois C. Dark fermentative volatile fatty acids production from food waste: A review of the potential central role in waste biorefineries. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2022; 40:1571-1593. [PMID: 35796574 DOI: 10.1177/0734242x221103940] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Volatile fatty acids (VFAs) are high-value chemicals that are increasingly demanded worldwide. Biological production via food waste (FW) dark fermentation (DF) is a promising option to achieve the sustainability and environmental benefits typical of biobased chemicals and concurrently manage large amounts of residues. DF has a great potential to play a central role in waste biorefineries due to its ability to hydrolyze and convert complex organic substrates into VFAs that can be used as building blocks for bioproducts, chemicals and fuels. Several challenges must be faced for full-scale implementation, including process optimization to achieve high and stable yields, the development of efficient techniques for selective recovery and the cost-effectiveness of the whole process. This review aims to critically discuss and statistically analyze the existing relationships between process performance and the main variables of concern. Moreover, opportunities, current challenges and perspectives of a FW-based and fermentation-centred biorefinery layout are discussed.
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Affiliation(s)
- Fabiano Asunis
- DICAAR - Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Cagliari, Italy
| | - Giovanna Cappai
- DICAAR - Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Cagliari, Italy
- Environmental Geology and Geoengineering Institute of the National Research Council (IGAG-CNR), Cagliari, Italy
| | - Alessandra Carucci
- DICAAR - Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Cagliari, Italy
- Environmental Geology and Geoengineering Institute of the National Research Council (IGAG-CNR), Cagliari, Italy
| | - Giorgia De Gioannis
- DICAAR - Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Cagliari, Italy
- Environmental Geology and Geoengineering Institute of the National Research Council (IGAG-CNR), Cagliari, Italy
| | - Paolo Dessì
- School of Chemistry and Energy Research Centre, Ryan Institute, National University of Ireland, Galway, Ireland
| | - Aldo Muntoni
- DICAAR - Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Cagliari, Italy
- Environmental Geology and Geoengineering Institute of the National Research Council (IGAG-CNR), Cagliari, Italy
| | - Alessandra Polettini
- Department of Civil, Building and Environmental Engineering, University of Rome "La Sapienza", Rome, Italy
| | - Raffaella Pomi
- Department of Civil, Building and Environmental Engineering, University of Rome "La Sapienza", Rome, Italy
| | - Andreina Rossi
- Department of Civil, Building and Environmental Engineering, University of Rome "La Sapienza", Rome, Italy
| | - Daniela Spiga
- DICAAR - Department of Civil and Environmental Engineering and Architecture, University of Cagliari, Cagliari, Italy
| | - Cristina Trois
- Department of Civil Engineering, School of Engineering, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Durban, South Africa
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21
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Extraction of low molecular weight polyhydroxyalkanoates from mixed microbial cultures using bio-based solvents. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Boey JY, Lee CK, Tay GS. Factors Affecting Mechanical Properties of Reinforced Bioplastics: A Review. Polymers (Basel) 2022; 14:polym14183737. [PMID: 36145883 PMCID: PMC9505779 DOI: 10.3390/polym14183737] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/24/2022] [Accepted: 08/27/2022] [Indexed: 01/12/2023] Open
Abstract
The short life cycle and recalcitrant nature of petroleum-based plastics have been associated with plastic waste accumulation due to their composition rather than worldwide overproduction. The drive to replace single-use products has sparked a considerable amount of research work to discover sustainable options for petroleum-based plastics. Bioplastics open up a new horizon in plastics manufacturing operations and industrial sectors because of their low environmental impact, superior biodegradability, and contribution to sustainable goals. Their mechanical properties regarding tensile, flexural, hardness, and impact strength vary substantially. Various attempts have been made to augment their mechanical characteristics and capacities by incorporating reinforcement materials, such as inorganic and lignocellulosic fibres. This review summarizes the research on the properties of bioplastics modified by fibre reinforcement, with a focus on mechanical performance. The mechanical properties of reinforced bioplastics are significantly driven by parameters such as filler type, filler percentage, and aspect ratio. Fibre treatment aims to promote fibre–matrix adhesion by changing their physical, chemical, thermal, and mechanical properties. A general overview of how different filler treatments affect the mechanical properties of the composite is also presented. Lastly, the application of natural fibre-reinforced bioplastics in the automobile, construction, and packaging industries is discussed.
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Affiliation(s)
- Jet Yin Boey
- Bioresource Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Chee Keong Lee
- Bioprocess Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Guan Seng Tay
- Bioresource Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Green Biopolymer, Coatings & Packaging Cluster, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Correspondence: ; Tel.: +60-4-6532201
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23
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Innovative solutions and challenges to increase the use of Poly(3-hydroxybutyrate) in food packaging and disposables. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Awasthi MK, Harirchi S, Sar T, Vs V, Rajendran K, Gómez-García R, Hellwig C, Binod P, Sindhu R, Madhavan A, Kumar ANA, Kumar V, Kumar D, Zhang Z, Taherzadeh MJ. Myco-biorefinery approaches for food waste valorization: Present status and future prospects. BIORESOURCE TECHNOLOGY 2022; 360:127592. [PMID: 35809874 DOI: 10.1016/j.biortech.2022.127592] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/30/2022] [Accepted: 07/02/2022] [Indexed: 06/15/2023]
Abstract
Increases in population and urbanization leads to generation of a large amount of food waste (FW) and its effective waste management is a major concern. But putrescible nature and high moisture content is a major limiting factor for cost effective FW valorization. Bioconversion of FW for the production of value added products is an eco-friendly and economically viable strategy for addressing these issues. Targeting on production of multiple products will solve these issues to greater extent. This article provides an overview of bioconversion of FW to different value added products.
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Affiliation(s)
- Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
| | - Sharareh Harirchi
- Swedish Centre for Resource Recovery, University of Borås, Borås 50190, Sweden
| | - Taner Sar
- Swedish Centre for Resource Recovery, University of Borås, Borås 50190, Sweden
| | - Vigneswaran Vs
- Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India
| | - Karthik Rajendran
- Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India
| | - Ricardo Gómez-García
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Coralie Hellwig
- Swedish Centre for Resource Recovery, University of Borås, Borås 50190, Sweden
| | - Parameswaran Binod
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Raveendran Sindhu
- Department of Food Technology, TKM Institute of Technology, Kollam 691 505, Kerala, India
| | - Aravind Madhavan
- Rajiv Gandhi Centre for Biotechnology, Jagathy, Thiruvananthapuram 695 014, Kerala, India
| | - A N Anoop Kumar
- Centre for Research in Emerging Tropical Diseases (CRET-D), Department of Zoology, University of Calicut, Malappuram 673635, Kerala, India
| | - Vinod Kumar
- School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK
| | - Deepak Kumar
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, 402 Walters Hall, 1 Forestry Drive, Syracuse, NY 13210, USA
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
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Thomas CM, Kumar D, Scheel RA, Ramarao B, Nomura CT. Production of Medium Chain Length polyhydroxyalkanoate copolymers from agro-industrial waste streams. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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From Organic Wastes and Hydrocarbons Pollutants to Polyhydroxyalkanoates: Bioconversion by Terrestrial and Marine Bacteria. SUSTAINABILITY 2022. [DOI: 10.3390/su14148241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The use of fossil-based plastics has become unsustainable because of the polluting production processes, difficulties for waste management sectors, and high environmental impact. Polyhydroxyalkanoates (PHA) are bio-based biodegradable polymers derived from renewable resources and synthesized by bacteria as intracellular energy and carbon storage materials under nutrients or oxygen limitation and through the optimization of cultivation conditions with both pure and mixed culture systems. The PHA properties are affected by the same principles of oil-derived polyolefins, with a broad range of compositions, due to the incorporation of different monomers into the polymer matrix. As a consequence, the properties of such materials are represented by a broad range depending on tunable PHA composition. Producing waste-derived PHA is technically feasible with mixed microbial cultures (MMC), since no sterilization is required; this technology may represent a solution for waste treatment and valorization, and it has recently been developed at the pilot scale level with different process configurations where aerobic microorganisms are usually subjected to a dynamic feeding regime for their selection and to a high organic load for the intracellular accumulation of PHA. In this review, we report on studies on terrestrial and marine bacteria PHA-producers. The available knowledge on PHA production from the use of different kinds of organic wastes, and otherwise, petroleum-polluted natural matrices coupling bioremediation treatment has been explored. The advancements in these areas have been significant; they generally concern the terrestrial environment, where pilot and industrial processes are already established. Recently, marine bacteria have also offered interesting perspectives due to their advantageous effects on production practices, which they can relieve several constraints. Studies on the use of hydrocarbons as carbon sources offer evidence for the feasibility of the bioconversion of fossil-derived plastics into bioplastics.
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Boccalon E, Gorrasi G. Functional bioplastics from food residual: Potentiality and safety issues. Compr Rev Food Sci Food Saf 2022; 21:3177-3204. [PMID: 35768940 DOI: 10.1111/1541-4337.12986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 04/30/2022] [Accepted: 05/03/2022] [Indexed: 11/26/2022]
Abstract
Plastic pollution and food waste are two global issues with much in common. Plastic containers were introduced as a practical and easy remedy to improve food preservation and reduce the risk of creating waste, but ironically, to address one problem, another has been made worse. The spread of single-use containers has dramatically increased the amount of plastic that has to be discarded, and the most urgent task is now to find a solution to what has become part of the problem. An innovative way around it consists of promoting the valorization of food residues by turning them into novel materials for packaging. Although the results are promising, the aim of completely replacing plastics with biodegradable materials still seems far from being achieved. This review illustrates the main strategies adopted thus far to produce new bioplastic materials and composites from waste resources and focuses on the pros and cons of the food recovery process to look for the aspects that represent an obstacle to the development of the circular food economy on an industrial scale.
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Affiliation(s)
- Elisa Boccalon
- Department of Industrial Engineering, University of Salerno, Salerno, Fisciano, Italy
| | - Giuliana Gorrasi
- Department of Industrial Engineering, University of Salerno, Salerno, Fisciano, Italy
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A Review on Biological Synthesis of the Biodegradable Polymers Polyhydroxyalkanoates and the Development of Multiple Applications. Catalysts 2022. [DOI: 10.3390/catal12030319] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Polyhydroxyalkanoates, or PHAs, belong to a class of biopolyesters where the biodegradable PHA polymer is accumulated by microorganisms as intracellular granules known as carbonosomes. Microorganisms can accumulate PHA using a wide variety of substrates under specific inorganic nutrient limiting conditions, with many of the carbon-containing substrates coming from waste or low-value sources. PHAs are universally thermoplastic, with PHB and PHB copolymers having similar characteristics to conventional fossil-based polymers such as polypropylene. PHA properties are dependent on the composition of its monomers, meaning PHAs can have a diverse range of properties and, thus, functionalities within this biopolyester family. This diversity in functionality results in a wide array of applications in sectors such as food-packaging and biomedical industries. In order for PHAs to compete with the conventional plastic industry in terms of applications and economics, the scale of PHA production needs to grow from its current low base. Similar to all new polymers, PHAs need continuous technological developments in their production and material science developments to grow their market opportunities. The setup of end-of-life management (biodegradability, recyclability) system infrastructure is also critical to ensure that PHA and other biobased biodegradable polymers can be marketed with maximum benefits to society. The biobased nature and the biodegradability of PHAs mean they can be a key polymer in the materials sector of the future. The worldwide scale of plastic waste pollution demands a reformation of the current polymer industry, or humankind will face the consequences of having plastic in every step of the food chain and beyond. This review will discuss the aforementioned points in more detail, hoping to provide information that sheds light on how PHAs can be polymers of the future.
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Singh A, Singh A. Microbial Degradation and Value Addition to Food and Agriculture Waste. Curr Microbiol 2022; 79:119. [PMID: 35235053 DOI: 10.1007/s00284-022-02809-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 02/11/2022] [Indexed: 11/26/2022]
Abstract
Food and agriculture waste (FAW) is a serious problem that is increasing globally. Wastage of raw materials or processed food due to various man-made activities is huge. This solid waste which is either being discarded by humans in their daily activities or an obligatory residue of agricultural processes is severely harming our environment. This becomes a major concern in densely populated agri-based countries, like India, China, and the USA. It is strongly debated that such issues need to be addressed very emphatically for sustainable development of ourselves and our surroundings. Lots of economic benefits can be obtained by reducing the food loss or converting the agricultural waste into useful products and these advantages can be in the form of better food security, reduced production cost, biodegradable products, and environment sustainability with cleaner options to reduce the ever-increasing global problem of garbage and waste management. Proper management of these substances can considerably lessen the risks to individual health. Reprocessing of waste is of great advantage as FAW has many components which may form an available resource to be converted to another useful product. Several approaches have been made for converting food waste into fruitful products. Bioconversion being the most prominent approach is helping us in a major way to overcome the problem of FAW. Microorganisms are at the forefront of this and have been extensively explored for their bioconversion potential. The present work focuses on the current state of food and agriculture waste and their valorization approaches. Through extensive literature review, we have highlighted and discussed the potential of microorganisms in bioconversion of waste, major types of functional ingredients derived during the process, and potential constraints in implementation of such state-of-the-art technology at industrial scale. The review also gives a brief technical overview of the conversion of waste products into energy generation and biofuels.
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Affiliation(s)
- Aditi Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Gomti Nagar Extension, Near Malhaur Railway Station, Lucknow, 226028, India.
| | - Avishka Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Gomti Nagar Extension, Near Malhaur Railway Station, Lucknow, 226028, India
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A fermentation process for the production of poly(3-hydroxybutyrate) using waste cooking oil or waste fish oil as inexpensive carbon substrate. BIOTECHNOLOGY REPORTS 2022; 33:e00700. [PMID: 35070732 PMCID: PMC8762085 DOI: 10.1016/j.btre.2022.e00700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/23/2021] [Accepted: 01/04/2022] [Indexed: 11/21/2022]
Abstract
Both WCO and WFO can be used as promising substrates for PHA production. First report of a fed-batch fermentation process using WFO as sole carbon source for PHA production. High PHB yields of 0.8 g/g and 0.92 g/g were produced from WCO and WFO, respectively. Highest PHB productivity (1.73 g/L/h) was achieved when using waste oil as carbon source.
The utilization of waste cooking oil (WCO) or waste fish oil (WFO) as inexpensive carbon substrate for the production of poly(3-hydroxybutyrate) (PHB) by Cupriavidus necator H16 was investigated. Fed-batch cultivation mode in bioreactor was applied in this study. High cell dry weight (CDW) of 135.1 g/L, PHB content of 76.9 wt%, PHB productivity of 1.73 g/L/h, and PHB yield of 0.8 g/g were obtained from WCO. In the case of WFO, the CDW, PHB content, PHB productivity, and PHB yield were 114.8 g/L, 72.5 wt%, 1.73 g/L/h, and 0.92 g/g, respectively. The PHB productivity and yield obtained in the current study from WCO or WFO are among the highest reported so far for PHA production using oils as sole carbon substrate, suggesting that both WCO and WFO can be used as inexpensive carbon substrates for the production of PHA on an industrial scale.
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Elhami V, Antunes EC, Temmink H, Schuur B. Recovery Techniques Enabling Circular Chemistry from Wastewater. Molecules 2022; 27:1389. [PMID: 35209179 PMCID: PMC8877087 DOI: 10.3390/molecules27041389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 12/04/2022] Open
Abstract
In an era where it becomes less and less accepted to just send waste to landfills and release wastewater into the environment without treatment, numerous initiatives are pursued to facilitate chemical production from waste. This includes microbial conversions of waste in digesters, and with this type of approach, a variety of chemicals can be produced. Typical for digestion systems is that the products are present only in (very) dilute amounts. For such productions to be technically and economically interesting to pursue, it is of key importance that effective product recovery strategies are being developed. In this review, we focus on the recovery of biologically produced carboxylic acids, including volatile fatty acids (VFAs), medium-chain carboxylic acids (MCCAs), long-chain dicarboxylic acids (LCDAs) being directly produced by microorganisms, and indirectly produced unsaturated short-chain acids (USCA), as well as polymers. Key recovery techniques for carboxylic acids in solution include liquid-liquid extraction, adsorption, and membrane separations. The route toward USCA is discussed, including their production by thermal treatment of intracellular polyhydroxyalkanoates (PHA) polymers and the downstream separations. Polymers included in this review are extracellular polymeric substances (EPS). Strategies for fractionation of the different fractions of EPS are discussed, aiming at the valorization of both polysaccharides and proteins. It is concluded that several separation strategies have the potential to further develop the wastewater valorization chains.
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Affiliation(s)
- Vahideh Elhami
- Sustainable Process Technology Group, Process and Catalysis Cluster, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands; (V.E.); (E.C.A.)
| | - Evelyn C. Antunes
- Sustainable Process Technology Group, Process and Catalysis Cluster, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands; (V.E.); (E.C.A.)
- Wetsus—European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands;
| | - Hardy Temmink
- Wetsus—European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands;
- Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| | - Boelo Schuur
- Sustainable Process Technology Group, Process and Catalysis Cluster, Faculty of Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands; (V.E.); (E.C.A.)
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32
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Biopolymers from Industrial Waste. Biopolymers 2022. [DOI: 10.1007/978-3-030-98392-5_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ortega F, Versino F, López OV, García MA. Biobased composites from agro-industrial wastes and by-products. EMERGENT MATERIALS 2022; 5:873-921. [PMID: 34849454 PMCID: PMC8614084 DOI: 10.1007/s42247-021-00319-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 10/14/2021] [Indexed: 05/09/2023]
Abstract
The greater awareness of non-renewable natural resources preservation needs has led to the development of more ecological high-performance polymeric materials with new functionalities. In this regard, biobased composites are considered interesting options, especially those obtained from agro-industrial wastes and by-products. These are low-cost raw materials derived from renewable sources, which are mostly biodegradable and would otherwise typically be discarded. In this review, recent and innovative academic studies on composites obtained from biopolymers, natural fillers and active agents, as well as green-synthesized nanoparticles are presented. An in-depth discussion of biobased composites structures, properties, manufacture, and life-cycle assessment (LCA) is provided along with a wide up-to-date overview of the most recent works in the field with appropriate references. Potential uses of biobased composites from agri-food residues such as active and intelligent food packaging, agricultural inputs, tissue engineering, among others are described, considering that the specific characteristics of these materials should match the proposed application.
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Affiliation(s)
- Florencia Ortega
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116 (1900), La Plata, Argentina
| | - Florencia Versino
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116 (1900), La Plata, Argentina
| | - Olivia Valeria López
- Planta Piloto de Ingeniería Química (PLAPIQUI), UNS-CONICET, Camino La Carrindanga km.7 (8000), Bahía Blanca, Argentina
| | - María Alejandra García
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP-CONICET-CICPBA, 47 y 116 (1900), La Plata, Argentina
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Trapé DV, López OV, Villar MA. Vinasse: from a residue to a high added value biopolymer. BIORESOUR BIOPROCESS 2021; 8:130. [PMID: 38650284 PMCID: PMC10992345 DOI: 10.1186/s40643-021-00476-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 12/01/2021] [Indexed: 11/10/2022] Open
Abstract
This work aimed to study the feasibility of using vinasse for polyhydroxybutyrate (PHB) production by Bacillus megaterium. To optimize the culture medium, a Box-Behnken design was employed considering carbon (C), nitrogen (N), and phosphorus (Ph) concentrations as independent variables and PHB productivity as the response variable. The productivity decreased when C or N were increased, probably due to the presence of phenolic compounds and the limitation of N for the production of PHB by Bacillus sp. bacteria. An additional experimental design to optimize the C/N ratio and growing conditions (fermentation time and temperature) was carried out. Fermentation time had a statistically significant effect on PHB productivity reaching 10.6 mg/L h. On the other hand, the variability in physicochemical properties of vinasse samples led to significant differences in PHB productivity. Lower productivity values were obtained when vinasse had higher values of DBO. Therefore, biopolymers production from vinasse is a feasible alternative to valorize this bioethanol by-product.
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Affiliation(s)
- Daiana V Trapé
- Planta Piloto de Ingeniería Química, PLAPIQUI (UNS-CONICET), Camino La Carrindanga Km. 7, 8000, Bahía Blanca, Argentina
- Departamento de Ingeniería Química, Universidad Nacional del Sur, Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - Olivia V López
- Planta Piloto de Ingeniería Química, PLAPIQUI (UNS-CONICET), Camino La Carrindanga Km. 7, 8000, Bahía Blanca, Argentina
- Departamento de Química, Universidad Nacional del Sur, Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - Marcelo A Villar
- Planta Piloto de Ingeniería Química, PLAPIQUI (UNS-CONICET), Camino La Carrindanga Km. 7, 8000, Bahía Blanca, Argentina.
- Departamento de Ingeniería Química, Universidad Nacional del Sur, Av. Alem 1253, 8000, Bahía Blanca, Argentina.
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Gudiukaite R, Nadda AK, Gricajeva A, Shanmugam S, Nguyen DD, Lam SS. Bioprocesses for the recovery of bioenergy and value-added products from wastewater: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 300:113831. [PMID: 34649321 DOI: 10.1016/j.jenvman.2021.113831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 09/04/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Wastewater and activated sludge present a major challenge worldwide. Wastewater generated from large and small-scale industries, laundries, human residential areas and other sources is emerging as a main problem in sanitation and maintenance of smart/green cities. During the last decade, different technologies and processes have been developed to recycle and purify the wastewater. Currently, identification and fundamental consideration of development of more advanced microbial-based technologies that enable wastewater treatment and simultaneous resource recovery to produce bioenergy, biofuels and other value-added compounds (organic acids, fatty acids, bioplastics, bio-pesticides, bio-surfactants and bio-flocculants etc.) became an emerging topic. In the last several decades, significant development of bioprocesses and techniques for the extraction and recovery of mentioned valuable molecules and compounds from wastewater, waste biomass or sludge has been made. This review presents different microbial-based process routes related to resource recovery and wastewater application for the production of value-added products and bioenergy. Current process limitations and insights for future research to promote more efficient and sustainable routes for this under-utilized and continually growing waste stream are also discussed.
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Affiliation(s)
- Renata Gudiukaite
- Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University, Sauletekis Avenue 7, LT-10257, Vilnius, Lithuania.
| | - Ashok Kumar Nadda
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan, 173 234, India.
| | - Alisa Gricajeva
- Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University, Sauletekis Avenue 7, LT-10257, Vilnius, Lithuania
| | - Sabarathinam Shanmugam
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400044, China
| | - D Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 442-760, South Korea
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
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Thygesen A, Tsapekos P, Alvarado-Morales M, Angelidaki I. Valorization of municipal organic waste into purified lactic acid. BIORESOURCE TECHNOLOGY 2021; 342:125933. [PMID: 34852434 DOI: 10.1016/j.biortech.2021.125933] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Municipal organic waste (biowaste) consists of food derived starch, protein and sugars, and lignocellulose derived cellulose, hemicellulose, lignin and pectin. Proper management enables nutrient recycling and sustainable production of platform chemicals such as lactic acid (LA). This review gathers the most important information regarding use of biowaste for LA fermentation covering pre-treatment, enzymatic hydrolysis, fermentation and downstream processing to achieve high purity LA. The optimal approach was found to treat the two biowaste fractions separately due to different pre-treatment and enzyme needs for achieving enzymatic hydrolysis and to do continues fermentation to achieve high cell density and high LA productivity up to 12 g/L/h for production of both L and D isomers. The specific productivity was 0.4 to 0.5 h-1 but with recalcitrant biomass, the enzymatic hydrolysis was rate limiting. Novel purification approaches included reactive distillation and emulsion liquid membrane separation yielding purities sufficient for polylactic acid production.
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Affiliation(s)
- Anders Thygesen
- Bioconversion Group, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 228A, DK-2800 Kgs. Lyngby, Denmark.
| | - Panagiotis Tsapekos
- Bioconversion Group, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 228A, DK-2800 Kgs. Lyngby, Denmark.
| | - Merlin Alvarado-Morales
- Bioconversion Group, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 228A, DK-2800 Kgs. Lyngby, Denmark.
| | - Irini Angelidaki
- Bioconversion Group, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 228A, DK-2800 Kgs. Lyngby, Denmark.
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Chien Bong CP, Alam MNHZ, Samsudin SA, Jamaluddin J, Adrus N, Mohd Yusof AH, Muis ZA, Hashim H, Salleh MM, Abdullah AR, Chuprat BRB. A review on the potential of polyhydroxyalkanoates production from oil-based substrates. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113461. [PMID: 34435568 DOI: 10.1016/j.jenvman.2021.113461] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 07/26/2021] [Accepted: 07/31/2021] [Indexed: 06/13/2023]
Abstract
Polyhydroxyalkanoate (PHA) is a type of polyesters produced in the form of accumulated intracellular granules by many microorganisms. It is viewed as an environmentally friendly bioproduct due to its biodegradability and biocompatibility. The production of the PHA using oil substrates such as waste oil and plant oil, has gained considerable attention due to the high product yield and lower substrate cost. Nevertheless, the PHA fermentation using oil substrate is complicated due to the heterogenous fatty acid composition, varied bio-accessibility and possible inhibitory effect on the bacterial culture. This review presents the current state-of-the-art of PHA production from oil-based substrates. This paper firstly discusses the technical details, such as the choice of bacteria strain and fermentation conditions, characteristic of the oil substrate as well as the PHA composition and application. Finally, the paper discusses the challenges and prospects for up-scaling towards a cleaner and effective bioprocess. From the literature review, depending on the cell culture and the type of PHA produced, the oil platform can have a PHA yield of 0.2-0.8 g PHA/g oil substrate, with PHA content mostly from 40 to 90% of the cell dry weight. There is an on-going search for more effective oil-utilising PHA producers and lower cost substrate for effective PHA production. The final application of the PHA polymer influences the treatment needed during downstream processing and its economic performance. PHA with different compositions exhibits varied decomposition behaviour under different conditions, requiring further insight towards its management towards a sustainable circular economy.
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Affiliation(s)
- Cassendra Phun Chien Bong
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Muhd Nazrul Hisham Zainal Alam
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Sani Amril Samsudin
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Jamarosliza Jamaluddin
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Nadia Adrus
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Abdul Halim Mohd Yusof
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Zarina Ab Muis
- Process Systems Engineering Centre (PROSPECT), School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Haslenda Hashim
- Process Systems Engineering Centre (PROSPECT), School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia.
| | - Madihah Md Salleh
- Faculty of Bioscience and Medical Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
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Cho JY, Lee Park S, Lee HJ, Kim SH, Suh MJ, Ham S, Bhatia SK, Gurav R, Park SH, Park K, Yoo D, Yang YH. Polyhydroxyalkanoates (PHAs) degradation by the newly isolated marine Bacillus sp. JY14. CHEMOSPHERE 2021; 283:131172. [PMID: 34157624 DOI: 10.1016/j.chemosphere.2021.131172] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/17/2021] [Accepted: 06/05/2021] [Indexed: 06/13/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are bioplastic substitutes for petroleum-derived plastics that may help to reduce the increasing environmental impact of plastic pollution. Among them, polyhydroxybutyrate (PHB) is a promising biopolymer, incentivizing many researchers to search for PHB-producing and PHB-degrading bacteria for improved PHB utilization. Many novel PHB-producing microorganisms have been discovered; however, relatively few PHB-degrading bacteria have been identified. Six PHB-degrading bacteria were found in marine soil and investigated their PHB-degrading abilities under various temperature and salinity conditions using solid-media based culture. Finally, thermotolerant and halotolerant PHB-degrader Bacillus sp. JY14 was selected. PHB degradation was confirmed by monitoring changes in the physical and chemical properties of PHB films incubated with Bacillus sp. JY14 using scanning electron microscopy, Fourier-transform infrared spectroscopy, and gel permeation chromatography. Further, PHB degradation ability of Bacillus sp. JY14 was measured in liquid culture by gas chromatography. After 14 days of cultivation with PHB film, Bacillus sp. JY14 achieved approximately 98% PHB degradation. Applying various bioplastics to assess the bacteria's biodegradation capabilities, the result showed that Bacillus sp. JY14 could also degrade P(3HB-co-4HB) and P(3HB-co-3HV). Overall, this study identified a thermotolerant and halotolerant bacteria capable of PHB degradation under solid and liquid conditions. These results suggest that this bacteria could be utilized to degrade various PHAs.
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Affiliation(s)
- Jang Yeon Cho
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sol Lee Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Hong-Ju Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sang Hyun Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Min Ju Suh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sion Ham
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea; Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, Republic of Korea
| | - Ranjit Gurav
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - See-Hyoung Park
- Department of Biological and Chemical Engineering, Hongik University, Sejong City, Republic of Korea
| | - Kyungmoon Park
- Department of Biological and Chemical Engineering, Hongik University, Sejong City, Republic of Korea
| | - Dongwon Yoo
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea; Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, Republic of Korea.
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Khattab AM, Esmael ME, Farrag AA, Ibrahim MIA. Structural assessment of the bioplastic (poly-3-hydroxybutyrate) produced by Bacillus flexus Azu-A2 through cheese whey valorization. Int J Biol Macromol 2021; 190:319-332. [PMID: 34411615 DOI: 10.1016/j.ijbiomac.2021.08.090] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/24/2021] [Accepted: 08/10/2021] [Indexed: 12/17/2022]
Abstract
The demand for the production of biodegradable plastics has significantly increased. Bioplastics have become an essential alternative to the threats of the daily consumable plastics, sourced from fossil fuels, to the environment. Polyhydroxyalkonates (PHAs) are a ubiquitous group of bioderived and biodegradable plastics, however their production is limited by the costs associated mainly with the carbon sources. Herein, this study aims to reduce the PHAs production cost by using a by-product from the dairy industry, i.e., cheese whey (CW), as a sole carbon source. The developed process recruits an aquatic isolate, Bacillus flexus Azu-A2, and is optimized via studying various parameters using the shaking flasks technique. The results showed that the maximum PHA production (0.95 g L-1) and PHA content (20.96%, w/w), were obtained after incubation period 72 h at 45 °C, 100 rpm agitation rate, 50% CWS concentration, pH 8.5, and 1.0 g L-1 ammonium chloride. Physiochemically, Fourier transform infrared spectroscopy (FTIR), gas chromatography-mass spectroscopy (GC-MS), nuclear magnetic resonance (NMR), and energy-dispersive X-ray (EDX) techniques, emphasized the type of the extracted PHA as polyhydroxybutyrate (PHB). The thermal properties of PHB were measured using differential scanning calorimetry (DSC), recording melting transition temperature (Tm) at 170.96 °C. Furthermore, a scanning electron microscope (SEM) visualized a homogenous microporous structure for the thin PHB biofilm. In essence, this study highlights the ability of Bacillus flexus Azu-A2 to produce a good yield of highly purified PHB at reduced production cost from dairy CW. Consequently, the current study paves the way for an improved whey management strategy.
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Affiliation(s)
- Abdelrahman M Khattab
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt
| | - Mahmoud E Esmael
- Al-Azhar Center for Fermentation Biotechnology and Applied Microbiology, Al-Azhar University, Nasr City, Cairo 11884, Egypt
| | - Ayman A Farrag
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt; Al-Azhar Center for Fermentation Biotechnology and Applied Microbiology, Al-Azhar University, Nasr City, Cairo 11884, Egypt
| | - Mohamed I A Ibrahim
- Laboratory of Marine Chemistry, Marine Environment Division, National Institute of Oceanography and Fisheries, NIOF, Egypt.
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Bilal M, Mehmood T, Nadeem F, Barbosa AM, de Souza RL, Pompeu GB, Meer B, Ferreira LFR, Iqbal HMN. Enzyme-Assisted Transformation of Lignin-Based Food Bio-residues into High-Value Products with a Zero-Waste Theme: A Review. WASTE AND BIOMASS VALORIZATION 2021. [DOI: 10.1007/s12649-021-01618-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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41
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Otoni CG, Azeredo HMC, Mattos BD, Beaumont M, Correa DS, Rojas OJ. The Food-Materials Nexus: Next Generation Bioplastics and Advanced Materials from Agri-Food Residues. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2102520. [PMID: 34510571 DOI: 10.1002/adma.202102520] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 06/14/2021] [Indexed: 06/13/2023]
Abstract
The most recent strategies available for upcycling agri-food losses and waste (FLW) into functional bioplastics and advanced materials are reviewed and the valorization of food residuals are put in perspective, adding to the water-food-energy nexus. Low value or underutilized biomass, biocolloids, water-soluble biopolymers, polymerizable monomers, and nutrients are introduced as feasible building blocks for biotechnological conversion into bioplastics. The latter are demonstrated for their incorporation in multifunctional packaging, biomedical devices, sensors, actuators, and energy conversion and storage devices, contributing to the valorization efforts within the future circular bioeconomy. Strategies are introduced to effectively synthesize, deconstruct and reassemble or engineer FLW-derived monomeric, polymeric, and colloidal building blocks. Multifunctional bioplastics are introduced considering the structural, chemical, physical as well as the accessibility of FLW precursors. Processing techniques are analyzed within the fields of polymer chemistry and physics. The prospects of FLW streams and biomass surplus, considering their availability, interactions with water and thermal stability, are critically discussed in a near-future scenario that is expected to lead to next-generation bioplastics and advanced materials.
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Affiliation(s)
- Caio G Otoni
- Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), Rod. Washington Luiz, km 235, São Carlos, SP, 13565-905, Brazil
| | - Henriette M C Azeredo
- Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita 2270, Fortaleza, CE, 60511-110, Brazil
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, Rua XV de Novembro 1452, São Carlos, SP, 13560-970, Brazil
| | - Bruno D Mattos
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, Aalto, Espoo, FIN-00076, Finland
| | - Marco Beaumont
- Department of Chemistry, University of Natural Resources and Life Sciences, Vienna (BOKU), Konrad-Lorenz-Str. 24, Tulln, A-3430, Austria
| | - Daniel S Correa
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, Rua XV de Novembro 1452, São Carlos, SP, 13560-970, Brazil
| | - Orlando J Rojas
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, Aalto, Espoo, FIN-00076, Finland
- Bioproducts Institute, Departments of Chemical & Biological Engineering, Chemistry and Wood Science, The University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
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Advanced Kinetic Modeling of Bio-co-polymer Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Production Using Fructose and Propionate as Carbon Sources. Processes (Basel) 2021. [DOI: 10.3390/pr9081260] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Biopolymers are a promising alternative to petroleum-based plastic raw materials. They are bio-based, non-toxic and degradable under environmental conditions. In addition to the homopolymer poly(3-hydroxybutyrate) (PHB), there are a number of co-polymers that have a broad range of applications and are easier to process in comparison to PHB. The most prominent representative from this group of bio-copolymers is poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). In this article, we show a new kinetic model that describes the PHBV production from fructose and propionic acid in Cupriavidus necator (C. necator). The developed model is used to analyze the effects of process parameter variations such as the CO2 amount in the exhaust gas and the feed rate. The presented model is a valuable tool to improve the microbial PHBV production process. Due to the coupling of CO2 online measurements in the exhaust gas to the biomass production, the model has the potential to predict the composition and the current yield of PHBV in the ongoing process.
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Vuong P, Lim DJ, Murphy DV, Wise MJ, Whiteley AS, Kaur P. Developing Bioprospecting Strategies for Bioplastics Through the Large-Scale Mining of Microbial Genomes. Front Microbiol 2021; 12:697309. [PMID: 34322108 PMCID: PMC8312272 DOI: 10.3389/fmicb.2021.697309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/21/2021] [Indexed: 11/22/2022] Open
Abstract
The accumulation of petroleum-based plastic waste has become a major issue for the environment. A sustainable and biodegradable solution can be found in Polyhydroxyalkanoates (PHAs), a microbially produced biopolymer. An analysis of the global phylogenetic and ecological distribution of potential PHA producing bacteria and archaea was carried out by mining a global genome repository for PHA synthase (PhaC), a key enzyme involved in PHA biosynthesis. Bacteria from the phylum Actinobacteria were found to contain the PhaC Class II genotype which produces medium-chain length PHAs, a physiology until now only found within a few Pseudomonas species. Further, several PhaC genotypes were discovered within Thaumarchaeota, an archaeal phylum with poly-extremophiles and the ability to efficiently use CO2 as a carbon source, a significant ecological group which have thus far been little studied for PHA production. Bacterial and archaeal PhaC genotypes were also observed in high salinity and alkalinity conditions, as well as high-temperature geothermal ecosystems. These genome mining efforts uncovered previously unknown candidate taxa for biopolymer production, as well as microbes from environmental niches with properties that could potentially improve PHA production. This in silico study provides valuable insights into unique PHA producing candidates, supporting future bioprospecting efforts toward better targeted and relevant taxa to further enhance the diversity of exploitable PHA production systems.
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Affiliation(s)
- Paton Vuong
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Daniel J. Lim
- Department of Physics and Astronomy, Curtin University, Perth, WA, Australia
| | - Daniel V. Murphy
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Michael J. Wise
- School of Physics, Mathematics and Computing, The University of Western Australia, Perth, WA, Australia
- Marshall Centre for Infectious Disease Research and Training, University of Western Australia, Perth, WA, Australia
| | | | - Parwinder Kaur
- UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
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Microbial cell factories for the production of polyhydroxyalkanoates. Essays Biochem 2021; 65:337-353. [PMID: 34132340 DOI: 10.1042/ebc20200142] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/14/2021] [Accepted: 05/26/2021] [Indexed: 12/20/2022]
Abstract
Pollution caused by persistent petro-plastics is the most pressing problem currently, with 8 million tons of plastic waste dumped annually in the oceans. Plastic waste management is not systematized in many countries, because it is laborious and expensive with secondary pollution hazards. Bioplastics, synthesized by microorganisms, are viable alternatives to petrochemical-based thermoplastics due to their biodegradable nature. Polyhydroxyalkanoates (PHAs) are a structurally and functionally diverse group of storage polymers synthesized by many microorganisms, including bacteria and Archaea. Some of the most important PHA accumulating bacteria include Cupriavidus necator, Burkholderia sacchari, Pseudomonas sp., Bacillus sp., recombinant Escherichia coli, and certain halophilic extremophiles. PHAs are synthesized by specialized PHA polymerases with assorted monomers derived from the cellular metabolite pool. In the natural cycle of cellular growth, PHAs are depolymerized by the native host for carbon and energy. The presence of these microbial PHA depolymerases in natural niches is responsible for the degradation of bioplastics. Polyhydroxybutyrate (PHB) is the most common PHA with desirable thermoplastic-like properties. PHAs have widespread applications in various industries including biomedicine, fine chemicals production, drug delivery, packaging, and agriculture. This review provides the updated knowledge on the metabolic pathways for PHAs synthesis in bacteria, and the major microbial hosts for PHAs production. Yeasts are presented as a potential candidate for industrial PHAs production, with their high amenability to genetic engineering and the availability of industrial-scale technology. The major bottlenecks in the commercialization of PHAs as an alternative for plastics and future perspectives are also critically discussed.
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Blanco FG, Hernández N, Rivero-Buceta V, Maestro B, Sanz JM, Mato A, Hernández-Arriaga AM, Prieto MA. From Residues to Added-Value Bacterial Biopolymers as Nanomaterials for Biomedical Applications. NANOMATERIALS 2021; 11:nano11061492. [PMID: 34200068 PMCID: PMC8228158 DOI: 10.3390/nano11061492] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/20/2021] [Accepted: 05/26/2021] [Indexed: 12/16/2022]
Abstract
Bacterial biopolymers are naturally occurring materials comprising a wide range of molecules with diverse chemical structures that can be produced from renewable sources following the principles of the circular economy. Over the last decades, they have gained substantial interest in the biomedical field as drug nanocarriers, implantable material coatings, and tissue-regeneration scaffolds or membranes due to their inherent biocompatibility, biodegradability into nonhazardous disintegration products, and their mechanical properties, which are similar to those of human tissues. The present review focuses upon three technologically advanced bacterial biopolymers, namely, bacterial cellulose (BC), polyhydroxyalkanoates (PHA), and γ-polyglutamic acid (PGA), as models of different carbon-backbone structures (polysaccharides, polyesters, and polyamides) produced by bacteria that are suitable for biomedical applications in nanoscale systems. This selection models evidence of the wide versatility of microorganisms to generate biopolymers by diverse metabolic strategies. We highlight the suitability for applied sustainable bioprocesses for the production of BC, PHA, and PGA based on renewable carbon sources and the singularity of each process driven by bacterial machinery. The inherent properties of each polymer can be fine-tuned by means of chemical and biotechnological approaches, such as metabolic engineering and peptide functionalization, to further expand their structural diversity and their applicability as nanomaterials in biomedicine.
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Affiliation(s)
- Francisco G. Blanco
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28040 Madrid, Spain; (F.G.B.); (N.H.); (V.R.-B.); (A.M.); (A.M.H.-A.)
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain
| | - Natalia Hernández
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28040 Madrid, Spain; (F.G.B.); (N.H.); (V.R.-B.); (A.M.); (A.M.H.-A.)
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain
| | - Virginia Rivero-Buceta
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28040 Madrid, Spain; (F.G.B.); (N.H.); (V.R.-B.); (A.M.); (A.M.H.-A.)
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain
| | - Beatriz Maestro
- Host-Parasite Interplay in Pneumococcal Infection Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain; (B.M.); (J.M.S.)
| | - Jesús M. Sanz
- Host-Parasite Interplay in Pneumococcal Infection Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain; (B.M.); (J.M.S.)
| | - Aránzazu Mato
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28040 Madrid, Spain; (F.G.B.); (N.H.); (V.R.-B.); (A.M.); (A.M.H.-A.)
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain
| | - Ana M. Hernández-Arriaga
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28040 Madrid, Spain; (F.G.B.); (N.H.); (V.R.-B.); (A.M.); (A.M.H.-A.)
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain
| | - M. Auxiliadora Prieto
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28040 Madrid, Spain; (F.G.B.); (N.H.); (V.R.-B.); (A.M.); (A.M.H.-A.)
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Biological Research Centre Margarita Salas, CIB-CSIC, 28040 Madrid, Spain
- Correspondence:
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46
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Shah S, Kumar A. Production and characterization of polyhydroxyalkanoates from industrial waste using soil bacterial isolates. Braz J Microbiol 2021; 52:715-726. [PMID: 33590449 PMCID: PMC8105478 DOI: 10.1007/s42770-021-00452-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/06/2021] [Indexed: 11/29/2022] Open
Abstract
Nowadays when conventional plastic is being looked as a menace, the possibility of it being replaced with polyhydroxyalkanoates (PHAs) which are biodegradable, environment friendly and biocompatible thermoplastics is not remote. PHAs are a fascinating group of biopolyesters stored within the cytoplasm of numerous bacterial cells as energy and carbon reserves. PHAs signify the best promising biological substitute to certain conventional petrochemical plastics which have wide range of applications in different industries such as biomedical sector, packaging, toners for printing, and adhesives for coating, etc. In the present study, PHAs producing bacterial strains were screened by Sudan black B staining and confirmed by Nile blue A staining. Out of forty bacterial strains showing positive results, six bacterial strains exhibited comparatively higher PHAs production. The highest PHAs producing bacterial strain was identified using 16s rRNA sequencing. Optimization of process parameters was performed by using one factor at a time (OFAT) approach. The isolated bacterium was able to synthesize PHAs when various agro-industrial wastes such as domestic kitchen waste, mixed fruit pulp, sugarcane molasses, and waste flour from bread factory were screened as a carbon substrate in the growth medium. The results showed accumulation of 44.5% PHAs of cell dry weight using domestic kitchen waste as carbon substrate. The characterization of biopolymers was performed using FTIR and XRD analysis. The commercial exploitation of results of this study may serve twin purposes of addressing the challenge of high production cost of PHAs being the major constraint in replacing petro-based plastics as well as address the problem of disposal of recurring domestic kitchen waste and other agro-industrial waste.
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Affiliation(s)
- Shreya Shah
- School of Biotechnology, Devi Ahilya University, Khandwa Road, Indore, 452001, India
| | - Anil Kumar
- School of Biotechnology, Devi Ahilya University, Khandwa Road, Indore, 452001, India.
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Chalima A, de Castro LF, Burgstaller L, Sampaio P, Carolas AL, Gildemyn S, Velghe F, Ferreira BS, Pais C, Neureiter M, Dietrich T, Topakas E. Waste-derived volatile fatty acids as carbon source for added-value fermentation approaches. FEMS Microbiol Lett 2021; 368:6283741. [PMID: 34036336 DOI: 10.1093/femsle/fnab054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 05/20/2021] [Indexed: 12/12/2022] Open
Abstract
The establishment of a sustainable circular bioeconomy requires the effective material recycling from biomass and biowaste beyond composting/fertilizer or anaerobic digestion/bioenergy. Recently, volatile fatty acids attracted much attention due to their potential application as carbon source for the microbial production of high added-value products. Their low-cost production from different types of wastes through dark fermentation is a key aspect, which will potentially lead to the sustainable production of fuels, materials or chemicals, while diminishing the waste volume. This article reviews the utilization of a volatile fatty acid platform for the microbial production of polyhydroxyalkanoates, single cell oil and omega-3 fatty acids, giving emphasis on the fermentation challenges for the efficient implementation of the bioprocess and how they were addressed. These challenges were addressed through a research project funded by the European Commission under the Horizon 2020 programme entitled 'VOLATILE-Biowaste derived volatile fatty acid platform for biopolymers, bioactive compounds and chemical building blocks'.
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Affiliation(s)
- Angelina Chalima
- Industrial Biotechnology and Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15780 Athens, Greece
| | - Laura Fernandez de Castro
- TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Álava, Leonardo Da Vinci 1, 01510 Miñano, Álava, Spain
| | - Lukas Burgstaller
- Institute of Environmental Biotechnology, Department of Agrobiotechnology, University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz-Str. 20, 3430 Tulln, Austria
| | - Paula Sampaio
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Ana Lúcia Carolas
- Biotrend SA - Biocant Park, Núcleo 04, Lote 2, 3060-197 Cantanhede, Portugal
| | | | | | | | - Celia Pais
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Markus Neureiter
- Institute of Environmental Biotechnology, Department of Agrobiotechnology, University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz-Str. 20, 3430 Tulln, Austria
| | - Thomas Dietrich
- TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Álava, Leonardo Da Vinci 1, 01510 Miñano, Álava, Spain
| | - Evangelos Topakas
- Industrial Biotechnology and Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str., Zografou Campus, 15780 Athens, Greece
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48
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Dutt Tripathi A, Paul V, Agarwal A, Sharma R, Hashempour-Baltork F, Rashidi L, Khosravi Darani K. Production of polyhydroxyalkanoates using dairy processing waste - A review. BIORESOURCE TECHNOLOGY 2021; 326:124735. [PMID: 33508643 DOI: 10.1016/j.biortech.2021.124735] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Bio-plastics are eco-friendly biopolymers finding tremendous application in the food and pharmaceutical industries. Bio-plastics have suitable physicochemical, mechanical properties, and do not cause any type of hazardous pollution upon disposal but have a high production cost. This can be minimized by screening potential bio-polymers producing strains, selecting inexpensive raw material, optimized cultivation conditions, and upstream processing. These bio-plastics specifically microbial-produced bio-polymers such as polyhydroxyalkanoates (PHAs) find application in food industries as packaging material owing to their desirable water barrier and gas permeability properties. The present review deals with the production, recovery, purification, characterization, and applications of PHAs. This is a comprehensive first review will also focus on different strategies adopted for efficient PHA production using dairy processing waste, its biosynthetic mechanism, metabolic engineering, kinetic aspects, and also biodegradability testing at the lab and pilot plant level. In addition to that, the authors will be emphasizing more on novel PHAs nanocomposites synthesis strategies and their commercial applicability.
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Affiliation(s)
- Abhishek Dutt Tripathi
- Department of Dairy Science and Food Technology, Institute of Agricultural Sciences, Banaras Hindu University, Uttar Pradesh, India
| | - Veena Paul
- Department of Dairy Science and Food Technology, Institute of Agricultural Sciences, Banaras Hindu University, Uttar Pradesh, India
| | - Aparna Agarwal
- Department of Food & Nutrition and Food Technology, Lady Irwin College, Sikandra Road, New Delhi 110001, India
| | - Ruchi Sharma
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat, Haryana 131028, India
| | - Fataneh Hashempour-Baltork
- Department of Food Technology Research, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Science, P. O. Box: 19395-4741, Tehran, Iran
| | - Ladan Rashidi
- Department of Food and Agricultural Products, Food Technology and Agricultural Products Research Center, Standard Research Institute, Karaj, Iran
| | - Kianoush Khosravi Darani
- Department of Food Technology Research, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Science, P. O. Box: 19395-4741, Tehran, Iran.
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Borrero-de Acuña JM, Rohde M, Saldias C, Poblete-Castro I. Fed-Batch mcl- Polyhydroxyalkanoates Production in Pseudomonas putida KT2440 and Δ phaZ Mutant on Biodiesel-Derived Crude Glycerol. Front Bioeng Biotechnol 2021; 9:642023. [PMID: 33796510 PMCID: PMC8007980 DOI: 10.3389/fbioe.2021.642023] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/18/2021] [Indexed: 11/13/2022] Open
Abstract
Crude glycerol has emerged as a suitable feedstock for the biotechnological production of various industrial chemicals given its high surplus catalyzed by the biodiesel industry. Pseudomonas bacteria metabolize the polyol into several biopolymers, including alginate and medium-chain-length poly(3-hydroxyalkanoates) (mcl-PHAs). Although P. putida is a suited platform to derive these polyoxoesters from crude glycerol, the attained concentrations in batch and fed-batch cultures are still low. In this study, we employed P. putida KT2440 and the hyper-PHA producer ΔphaZ mutant in two different fed-batch modes to synthesize mcl-PHAs from raw glycerol. Initially, the cells grew in a batch phase (μmax 0.21 h–1) for 22 h followed by a carbon-limiting exponential feeding, where the specific growth rate was set at 0.1 (h–1), resulting in a cell dry weight (CDW) of nearly 50 (g L–1) at 40 h cultivation. During the PHA production stage, we supplied the substrate at a constant rate of 50 (g h–1), where the KT2440 and the ΔphaZ produced 9.7 and 12.7 gPHA L–1, respectively, after 60 h cultivation. We next evaluated the PHA production ability of the P. putida strains using a DO-stat approach under nitrogen depletion. Citric acid was the main by-product secreted by the cells, accumulating in the culture broth up to 48 (g L–1) under nitrogen limitation. The mutant ΔphaZ amassed 38.9% of the CDW as mcl-PHA and exhibited a specific PHA volumetric productivity of 0.34 (g L–1 h–1), 48% higher than the parental KT2440 under the same growth conditions. The biosynthesized mcl-PHAs had average molecular weights ranging from 460 to 505 KDa and a polydispersity index (PDI) of 2.4–2.6. Here, we demonstrated that the DO-stat feeding approach in high cell density cultures enables the high yield production of mcl-PHA in P. putida strains using the industrial crude glycerol, where the fed-batch process selection is essential to exploit the superior biopolymer production hallmarks of engineered bacterial strains.
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Affiliation(s)
- José Manuel Borrero-de Acuña
- Institute for Microbiology, Technische Universität Braunschweig, Braunschweig, Germany.,Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Braunschweig, Germany
| | - Manfred Rohde
- Central Facility of Microscopy, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Cesar Saldias
- Departamento de Química Física, Facultad de Química y Farmacia, Pontificia Universidad Católica de Chile, Macul, Chile
| | - Ignacio Poblete-Castro
- Biosystems Engineering Laboratory, Faculty of Life Sciences, Center for Bioinformatics and Integrative Biology, Universidad Andres Bello, Santiago, Chile
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Enhanced polyhydroxybutyrate (PHB) production by newly isolated rare actinomycetes Rhodococcus sp. strain BSRT1-1 using response surface methodology. Sci Rep 2021; 11:1896. [PMID: 33479335 PMCID: PMC7820505 DOI: 10.1038/s41598-021-81386-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 01/06/2021] [Indexed: 02/07/2023] Open
Abstract
Poly-β-hydroxybutyrate (PHB) is a biodegradable polymer, synthesized as carbon and energy reserve by bacteria and archaea. To the best of our knowledge, this is the first report on PHB production by a rare actinomycete species, Rhodococcus pyridinivorans BSRT1-1. Response surface methodology (RSM) employing central composite design, was applied to enhance PHB production in a flask scale. A maximum yield of 3.6 ± 0.5 g/L in biomass and 43.1 ± 0.5 wt% of dry cell weight (DCW) of PHB were obtained when using RSM optimized medium, which was improved the production of biomass and PHB content by 2.5 and 2.3-fold, respectively. The optimized medium was applied to upscale PHB production in a 10 L stirred-tank bioreactor, maximum biomass of 5.2 ± 0.5 g/L, and PHB content of 46.8 ± 2 wt% DCW were achieved. Furthermore, the FTIR and 1H NMR results confirmed the polymer as PHB. DSC and TGA analysis results revealed the melting, glass transition, and thermal decomposition temperature of 171.8, 4.03, and 288 °C, respectively. In conclusion, RSM can be a promising technique to improve PHB production by a newly isolated strain of R. pyridinivorans BSRT1-1 and the properties of produced PHB possessed similar properties compared to commercial PHB.
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