1
|
Cabrera-Villamizar L, Campano C, López-Rubio A, Fabra MJ, Prieto MA. Tailoring the structural and physicochemical properties of rice straw cellulose-based cryogels by cell-mediated polyhydroxyalkanoate deposition. Carbohydr Polym 2024; 346:122604. [PMID: 39245490 DOI: 10.1016/j.carbpol.2024.122604] [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: 06/13/2024] [Revised: 08/05/2024] [Accepted: 08/08/2024] [Indexed: 09/10/2024]
Abstract
This study presents a novel biotechnological approach for creating water vapor-resistant cryogels with improved integrity. Rice straw cellulose was transformed into nanofibrils through TEMPO-mediated oxidation and high-pressure homogenization. The resulting cryogels remained firm even when immersed in aqueous media, whose pores were used by live cell to deposit polyhydroxyalkanoate (PHA) particles inside them. This novel method allowed the compatibilization of PHA within the cellulosic fibers. As a consequence, the water sorption capacity was decreased by up to 6 times having just 4 % of PHA compared to untreated cryogels, preserving the cryogel density and elasticity. Additionally, this technique can be adapted to various bacterial strains and PHA types, allowing for further optimization. It was demonstrated that the amount and type of PHA (medium chain length and small chain length-PHA) used affects the properties for the cryogels, especially the water vapor sorption behavior and the compressive strength. Compared to traditional coating methods, this cell-mediated approach not only allows to distribute PHA on the surface of the cryogel, but also ensures polymer penetration throughout the cryogel due to bacterial self-movement. This study opens doors for creating cryogels with tunable water vapor sorption and other additional functionalities through the use of specialized PHA variants.
Collapse
Affiliation(s)
- Laura Cabrera-Villamizar
- Food Safety and Preservation Department, Institute of Agrochemistry and Food Technology (IATA), CSIC, Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980, Valencia, Spain.
| | - Cristina Campano
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast), CSIC, Madrid 28006, Spain; Polymer Biotechnology Group, Biological Research Centre Margarita Salas, Spanish National Research Council (CIB), CSIC, C. Ramiro de Maeztu, 9, 28040 Madrid, Spain.
| | - Amparo López-Rubio
- Food Safety and Preservation Department, Institute of Agrochemistry and Food Technology (IATA), CSIC, Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980, Valencia, Spain; Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast), CSIC, Madrid 28006, Spain.
| | - María José Fabra
- Food Safety and Preservation Department, Institute of Agrochemistry and Food Technology (IATA), CSIC, Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980, Valencia, Spain; Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast), CSIC, Madrid 28006, Spain.
| | - M Auxiliadora Prieto
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast), CSIC, Madrid 28006, Spain; Polymer Biotechnology Group, Biological Research Centre Margarita Salas, Spanish National Research Council (CIB), CSIC, C. Ramiro de Maeztu, 9, 28040 Madrid, Spain.
| |
Collapse
|
2
|
Cruz-Romero CL, Chávez-Ramírez AU, Flores-Juárez CR, Arjona N, Álvarez-López A, del Bosque Plata L, Vallejo-Becerra V, Galindo-de-la-Rosa JDD. Biosynthesis of Polyhydroalkanoates Doped with Silver Nanoparticles Using Pseudomonas putida and Pseudomonas aeruginosa for Antibacterial Polymer Applications. Int J Mol Sci 2024; 25:8996. [PMID: 39201681 PMCID: PMC11354355 DOI: 10.3390/ijms25168996] [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: 07/19/2024] [Revised: 07/26/2024] [Accepted: 07/29/2024] [Indexed: 09/03/2024] Open
Abstract
In this study, the biosynthesis of polyhydroxyalkanoates (PHAs) was carried out using Pseudomonas putida and Pseudomonas aeruginosa. These PHAs were produced using reagent-grade glycerol and crude glycerol as the carbon sources. The objective was to compare the production of PHAs and to functionalize these polymers with silver nanoparticles to provide antibacterial properties for potential biomedical applications. The findings from the physical and chemical analyses confirmed the successful synthesis and extraction of PHAs, achieving comparable yields using both crude glycerol and reagent-grade glycerol as carbon sources across both strains. Approximately 16% higher PHAs production was obtained using Pseudomonas putida compared to Pseudomonas aeruginosa, and no significant difference was observed in the production rate of PHAs between the two carbon sources used, which means that crude glycerol could be utilized even though it has more impurities. Notably, PHAs functionalized with silver nanoparticles showed improved antibacterial effectiveness, especially those derived from reagent-grade glycerol and the Pseudomonas aeruginosa strain.
Collapse
Affiliation(s)
- Carmen Liliana Cruz-Romero
- Facultad de Ingeniería, División de Investigación y Posgrado, Centro Universitario Cerro de las Campanas, Universidad Autónoma de Querétaro, Querétaro, Qro. C.P. 76010, Mexico; (C.L.C.-R.); (A.Á.-L.)
| | - Abraham Ulises Chávez-Ramírez
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Pedro Escobedo, Qro. C.P. 76703, Mexico; (A.U.C.-R.); (N.A.)
| | - Cyntia R. Flores-Juárez
- División Industrial Área de Nanotecnología, Universidad Tecnológica de Querétaro, Querétaro, Qro. C.P. 76148, Mexico;
| | - Noé Arjona
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Pedro Escobedo, Qro. C.P. 76703, Mexico; (A.U.C.-R.); (N.A.)
| | - Alejandra Álvarez-López
- Facultad de Ingeniería, División de Investigación y Posgrado, Centro Universitario Cerro de las Campanas, Universidad Autónoma de Querétaro, Querétaro, Qro. C.P. 76010, Mexico; (C.L.C.-R.); (A.Á.-L.)
| | | | - Vanessa Vallejo-Becerra
- Facultad de Ingeniería, División de Investigación y Posgrado, Centro Universitario Cerro de las Campanas, Universidad Autónoma de Querétaro, Querétaro, Qro. C.P. 76010, Mexico; (C.L.C.-R.); (A.Á.-L.)
| | - Juan de Dios Galindo-de-la-Rosa
- Facultad de Ingeniería, División de Investigación y Posgrado, Centro Universitario Cerro de las Campanas, Universidad Autónoma de Querétaro, Querétaro, Qro. C.P. 76010, Mexico; (C.L.C.-R.); (A.Á.-L.)
| |
Collapse
|
3
|
Ahuja V, Singh PK, Mahata C, Jeon JM, Kumar G, Yang YH, Bhatia SK. A review on microbes mediated resource recovery and bioplastic (polyhydroxyalkanoates) production from wastewater. Microb Cell Fact 2024; 23:187. [PMID: 38951813 PMCID: PMC11218116 DOI: 10.1186/s12934-024-02430-0] [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: 03/05/2024] [Accepted: 05/20/2024] [Indexed: 07/03/2024] Open
Abstract
BACKGROUND Plastic is widely utilized in packaging, frameworks, and as coverings material. Its overconsumption and slow degradation, pose threats to ecosystems due to its toxic effects. While polyhydroxyalkanoates (PHA) offer a sustainable alternative to petroleum-based plastics, their production costs present significant obstacles to global adoption. On the other side, a multitude of household and industrial activities generate substantial volumes of wastewater containing both organic and inorganic contaminants. This not only poses a threat to ecosystems but also presents opportunities to get benefits from the circular economy. Production of bioplastics may be improved by using the nutrients and minerals in wastewater as a feedstock for microbial fermentation. Strategies like feast-famine culture, mixed-consortia culture, and integrated processes have been developed for PHA production from highly polluted wastewater with high organic loads. Various process parameters like organic loading rate, organic content (volatile fatty acids), dissolved oxygen, operating pH, and temperature also have critical roles in PHA accumulation in microbial biomass. Research advances are also going on in downstream and recovery of PHA utilizing a combination of physical and chemical (halogenated solvents, surfactants, green solvents) methods. This review highlights recent developments in upcycling wastewater resources into PHA, encompassing various production strategies, downstream processing methodologies, and techno-economic analyses. SHORT CONCLUSION Organic carbon and nitrogen present in wastewater offer a promising, cost-effective source for producing bioplastic. Previous attempts have focused on enhancing productivity through optimizing culture systems and growth conditions. However, despite technological progress, significant challenges persist, such as low productivity, intricate downstream processing, scalability issues, and the properties of resulting PHA.
Collapse
Affiliation(s)
- Vishal Ahuja
- Department of Biotechnology, University Centre for Research & Development, Chandigarh University, Mohali, Punjab, 140413, India
| | - Pankaj Kumar Singh
- Department of Biotechnology, University Centre for Research & Development, Chandigarh University, Mohali, Punjab, 140413, India
| | - Chandan Mahata
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana- Champaign, 1304 W. Pennsylvania Avenue, Urbana, 61801, USA
| | - Jong-Min Jeon
- Green & Sustainable Materials R&D Department, Research Institute of Clean Manufacturing System, Korea Institute of Industrial Technology (KITECH), Chungnam, 331-825, Republic of Korea
| | - Gopalakrishnan Kumar
- School of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea
- Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Box 8600, Forus, Stavanger, 4036, Norway
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
- Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, 05029, Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea.
- Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, 05029, Republic of Korea.
| |
Collapse
|
4
|
Sachan RSK, Devgon I, Sharma V, Perveen K, Bukhari NA, Alsulami JA, Jadon VS, Suyal DC, Karnwal A. Investigating chemical pre-treatment methods: Valorization of wheat straw to enhance polyhydroxyalkanoate (PHA) production with novel isolate Bacillus paranthracis RSKS-3. Heliyon 2024; 10:e31572. [PMID: 38828345 PMCID: PMC11140699 DOI: 10.1016/j.heliyon.2024.e31572] [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: 08/24/2023] [Revised: 03/03/2024] [Accepted: 05/18/2024] [Indexed: 06/05/2024] Open
Abstract
Wheat is a crucial food crop worldwide, generating straw upon post-harvest. The straw is often burned to enhance soil fertility, leading to massive air pollution. In this study, wheat straw was investigated for the production of Polyhydroxyalkanoate (PHA) using the novel isolate Bacillus paranthracis RSKS-3. The wheat straw was pulverized and valorized with different acids (2 % and 4 % H2SO4, acetic acid, and hydrochloric acid) and alkalis (2 % and 4 % NaOH, calcium carbonate, and potassium hydroxide). The validation of carbohydrates was done using the Molisch test by analyzing purple-ring production and the DNS test which concluded 4 % H2SO4 as an effective treatment with a maximal sugar yield of 5.04 mg/mL at P < 0.05. The bioconversion efficiency of the extract to PHA resulted in 0.87 g/L by Bacillus paranthracis RSKS-3, later characterized by Ultraviolet (UV)-spectroscopy and FT-IR assessment. The findings of the research offer a potential strategy to mitigate airborne pollutants that result from smouldering wheat straw, thereby contributing significant improvements to sustainable development.
Collapse
Affiliation(s)
- Rohan Samir Kumar Sachan
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, Punjab, India
| | - Inderpal Devgon
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, Punjab, India
| | - Vikas Sharma
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, Punjab, India
| | - Kahkashan Perveen
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh, 11495, Saudi Arabia
| | - Najat A. Bukhari
- Department of Botany & Microbiology, College of Science, P.O. Box-22452, King Saud University, Riyadh, 11495, Saudi Arabia
| | - Jamilah A. Alsulami
- Microbiology Department, Howard University, 2400 Sixth Street, N.W, Washington, DC, 20059, USA
| | - Vikash Singh Jadon
- Himalayan School of Biosciences, Swami Rama Himalayan University, Jollygrant, Dehradun, India
| | - Deep Chandra Suyal
- Vidyadayini Institute of Science, Management and Technology, Sajjan Singh Nagar, Raisen Rd, Opposite Patel Nagar, Bhopal, Madhya Pradesh, India
| | - Arun Karnwal
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, Punjab, India
| |
Collapse
|
5
|
Yoo Y, Young Kwon D, Jeon M, Lee J, Kwon H, Lee D, Seong Khim J, Choi YE, Kim JJ. Enhancing poly(3-hydroxybutyrate) production in halophilic bacteria through improved salt tolerance. BIORESOURCE TECHNOLOGY 2024; 394:130175. [PMID: 38086463 DOI: 10.1016/j.biortech.2023.130175] [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: 11/06/2023] [Revised: 12/06/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Polyhydroxyalkanoates (PHA) have emerged as a promising bio-compound in the industrial application due to their potential to replace conventional petroleum-based plastics with sustainable bioplastics. This study focuses on Halomonas sp. YJPS3-3, a halophilic bacterium, and presents a novel approach to enhance PHA production by exploiting its salt tolerance toward PHA biosynthesis. Through gamma irradiation-induced mutants with enhanced salt tolerance from 15% NaCl to 20% NaCl, mutant halo6 showing a significant 11% increase in PHA yield, was achieved. Moreover, the mutants displayed not only higher PHA content but also remarkable cell morphology with elongation. In addition, this research unravels the genetic determinants behind the elevated PHA content and identifies a corresponding shift in fatty acid composition favoring PHA accumulation. This novel mutant obtained from gamma irradiation with enhanced salt tolerance in halophilic bacteria opens up new avenues not only for the bioplastic industry but also for applications in the production of high-value metabolites.
Collapse
Affiliation(s)
- Yeonjae Yoo
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Dae Young Kwon
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Minseo Jeon
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea
| | - Jaehoon Lee
- Department of Plant Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Haeun Kwon
- Department of Plant Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Dongho Lee
- Department of Plant Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Jong Seong Khim
- School of Earth and Environmental Sciences & Research Institute of Oceanography, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoon-E Choi
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Jae-Jin Kim
- Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, Seoul 02841, Republic of Korea.
| |
Collapse
|
6
|
González-Rojo S, Paniagua-García AI, Díez-Antolínez R. Biotransformation of starch-based wastewater into bioplastics: Optimization of poly(3-hydroxybutyrate) production by Cupriavidus necator DSM 545 using potato wastewater hydrolysate. WATER RESEARCH 2023; 247:120766. [PMID: 37897996 DOI: 10.1016/j.watres.2023.120766] [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: 07/27/2023] [Revised: 10/16/2023] [Accepted: 10/19/2023] [Indexed: 10/30/2023]
Abstract
Biodegradable biopolymers, such as polyhydroxyalkanoates (PHAs), have emerged as an alternative to petrochemical-based plastics. The present work explores the production of PHAs based on the biotransformation of potato processing wastewater and addresses two different strategies for PHA recovery. To this end, culture conditions for PHA synthesis by Cupriavidus necator DSM 545 were optimized on a laboratory scale using a response surface methodology-based experimental design. Optimal conditions rendered a PHB, poly(3-hydroxybutyrate), accumulation of 83.74 ± 2.37 % (5.1 ± 0.2 gL-1), a 1.4-fold increase compared to the initial conditions. Moreover, polymer extraction with non-halogenated agent improved PHB recovery compared to chloroform method (PHB yield up to 78.78 ± 0.57 %), while maintaining PHB purity. (99.83 ± 4.95 %). Overall, the present work demonstrated the potential valorization of starch-based wastewater by biotransformation into PHBs, a high value-added product, and showed that recovery approaches more eco-friendly than the traditional treatments could be applied to PHB recovery to some extent.
Collapse
Affiliation(s)
- S González-Rojo
- Centro de Biocombustibles y Bioproductos, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Polígono Agroindustrial del Órbigo p. 2-6, Villarejo de Órbigo 24358, León, Spain.
| | - A I Paniagua-García
- Centro de Biocombustibles y Bioproductos, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Polígono Agroindustrial del Órbigo p. 2-6, Villarejo de Órbigo 24358, León, Spain
| | - R Díez-Antolínez
- Centro de Biocombustibles y Bioproductos, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Polígono Agroindustrial del Órbigo p. 2-6, Villarejo de Órbigo 24358, León, Spain
| |
Collapse
|
7
|
Che L, Jin W, Zhou X, Han W, Chen Y, Chen C, Jiang G. Current status and future perspectives on the biological production of polyhydroxyalkanoates. ASIA-PAC J CHEM ENG 2023. [DOI: 10.1002/apj.2899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Affiliation(s)
- Lin Che
- School of Environment, Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment, 150090 Harbin China
- Shenzhen Engineering Laboratory of Microalgae Bioenergy Harbin Institute of Technology (Shenzhen), 518055 Shenzhen China
| | - Wenbiao Jin
- School of Environment, Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment, 150090 Harbin China
- Shenzhen Engineering Laboratory of Microalgae Bioenergy Harbin Institute of Technology (Shenzhen), 518055 Shenzhen China
| | - Xu Zhou
- School of Environment, Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment, 150090 Harbin China
- Shenzhen Engineering Laboratory of Microalgae Bioenergy Harbin Institute of Technology (Shenzhen), 518055 Shenzhen China
| | - Wei Han
- School of Environment, Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment, 150090 Harbin China
- Shenzhen Engineering Laboratory of Microalgae Bioenergy Harbin Institute of Technology (Shenzhen), 518055 Shenzhen China
| | - Yidi Chen
- School of Environment, Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment, 150090 Harbin China
| | - Chuan Chen
- School of Environment, Harbin Institute of Technology State Key Laboratory of Urban Water Resource and Environment, 150090 Harbin China
| | - Guangming Jiang
- School of Civil, Mining and Environmental Engineering University of Wollongong Wollongong NSW 2522 Australia
| |
Collapse
|
8
|
Can Biomass Mastication Assist the Downstreaming of Polyhydroxyalkanoates Produced from Mixed Microbial Cultures? MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020767. [PMID: 36677824 PMCID: PMC9861560 DOI: 10.3390/molecules28020767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are natural polyesters which biodegrade in soils and oceans but have more than double the cost of comparable oil-based polymers. PHA downstreaming from its biomass represents 50% of its overall cost. Here, in an attempt to assist downstreaming, mastication of wet biomasses is tested as a new mechanical continuous biomass pretreatment with potential for industrial upscaling. Downstreaming conditions where both product recovery and purity are low due to the large amount of treated wet biomass (50% water) were targeted with the following process: extraction of 20 g in 100 mL solvent at 30 °C for 2 h, followed by 4.8 h digestion of 20 g in 0.3 M NaOH. Under the studied conditions, NaOH digestion was more effective than solvent extraction in recovering larger PHA amounts, but with less purity. A nearly 50% loss of PHA was seen during digestion after mastication. PHAs downstreamed by digestion with large amounts of impurities started to degrade at lower temperatures, but their melt elasticity was thermally stable at 170 °C. As such, these materials are attractive as fully PHA-compatible processing aids, reinforcing fillers or viscosity modifiers. On the other hand, wet biomass mastication before solvent extraction improves PHA purity and thermal stability as well as the melt rheology, which recovers the viscoelasticity measured with a PHA extracted from a dried biomass.
Collapse
|
9
|
Estévez-Alonso Á, Altamira-Algarra B, Arnau-Segarra C, van Loosdrecht MCM, Kleerebezem R, Werker A. Process conditions affect properties and outcomes of polyhydroxyalkanoate accumulation in municipal activated sludge. BIORESOURCE TECHNOLOGY 2022; 364:128035. [PMID: 36182016 DOI: 10.1016/j.biortech.2022.128035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/19/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
The developments of mixed culture polyhydroxyalkanoate production has been directed to maximize the biomass PHA content with limited attention to polymer quality. Direct comparison of PHA accumulation literature is challenging, and even regularly contradicting in reported results, due to underlying differences that are not well expressed. A study was undertaken to systematically compare the commonly reported process conditions for PHA accumulation by full-scale municipal activated sludge. A biomass acclimation step combined with a pulse-wise feeding strategy resulted in maximum average PHA contents and product yields. pH control and active nitrification did not result in observable effects on the PHA productivity. Under these conditions a high molecular weight polymer (1536 ± 221 kDa) can be produced. Polymer extraction recoveries were influenced by the PHA molecular weight. A standard protocol for an activated sludge PHA accumulation test including downstream processing and standardized extraction has been developed and is available as supplementary material.
Collapse
Affiliation(s)
- Ángel Estévez-Alonso
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands; Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911, MA, Leeuwarden, The Netherlands.
| | - Beatriz Altamira-Algarra
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911, MA, Leeuwarden, The Netherlands
| | - César Arnau-Segarra
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911, MA, Leeuwarden, The Netherlands
| | - Mark C M van Loosdrecht
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Robbert Kleerebezem
- Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Alan Werker
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911, MA, Leeuwarden, The Netherlands
| |
Collapse
|
10
|
Montiel-Jarillo G, Morales-Urrea DA, Contreras EM, López-Córdoba A, Gómez-Pachón EY, Carrera J, Suárez-Ojeda ME. Improvement of the Polyhydroxyalkanoates Recovery from Mixed Microbial Cultures Using Sodium Hypochlorite Pre-Treatment Coupled with Solvent Extraction. Polymers (Basel) 2022; 14:polym14193938. [PMID: 36235886 PMCID: PMC9573287 DOI: 10.3390/polym14193938] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/19/2022] [Accepted: 08/30/2022] [Indexed: 11/16/2022] Open
Abstract
The use of mixed microbial cultures (MMC) and organic wastes and wastewaters as feed sources is considered an appealing approach to reduce the current polyhydroxyalkanoates (PHAs) production costs. However, this method entails an additional hurdle to the PHAs downstream processing (recovery and purification). In the current work, the effect of a sodium hypochlorite (NaClO) pre-treatment coupled with dimethyl carbonate (DMC) or chloroform (CF) as extraction solvents on the PHAs recovery efficiency (RE) from MMC was evaluated. MMC were harvested from a sequencing batch reactor (SBR) fed with a synthetic prefermented olive mill wastewaster. Two different carbon-sources (acetic acid and acetic/propionic acids) were employed during the batch accumulation of polyhydroxybutyrate (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from MMC. Obtained PHAs were characterized by 1H and 13C nuclear magnetic resonance, gel-permeation chromatography, differential scanning calorimetry, and thermal gravimetric analysis. The results showed that when a NaClO pre-treatment is not added, the use of DMC allows to obtain higher RE of both biopolymers (PHB and PHBV), in comparison with CF. In contrast, the use of CF as extraction solvent required a pre-treatment step to improve the PHB and PHBV recovery. In all cases, RE values were higher for PHBV than for PHB.
Collapse
Affiliation(s)
- Gabriela Montiel-Jarillo
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Escola d’Enginyeria. Edifici Q Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Diego A. Morales-Urrea
- División Catalizadores y Superficies, Instituto de Investigaciones en Ciencia y Tecnología de Materiales, INTEMA (CONICET), Av. Colón 10850, Mar del Plata 7600, Argentina
- Correspondence: (D.A.M.-U.); (M.E.S.-O.)
| | - Edgardo M. Contreras
- División Catalizadores y Superficies, Instituto de Investigaciones en Ciencia y Tecnología de Materiales, INTEMA (CONICET), Av. Colón 10850, Mar del Plata 7600, Argentina
| | - Alex López-Córdoba
- Grupo de Investigación en Bioeconomía y Sostenibilidad Agroalimentaria, Escuela de Administración de Empresas Agropecuarias, Facultad Seccional Duitama, Universidad Pedagógica y Tecnológica de Colombia, Carrera 18 con Calle 22, Duitama 150461, Colombia
| | - Edwin Yesid Gómez-Pachón
- Grupo de Investigación en Diseño, Innovación y Asistencia Técnica de Materiales Avanzados-DITMAV, Escuela de Diseño Industrial, Universidad Pedagógica y Tecnológica de Colombia-UPTC, Duitama 150461, Colombia
| | - Julián Carrera
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Escola d’Enginyeria. Edifici Q Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - María Eugenia Suárez-Ojeda
- GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, Escola d’Enginyeria. Edifici Q Campus UAB, Bellaterra, 08193 Barcelona, Spain
- Correspondence: (D.A.M.-U.); (M.E.S.-O.)
| |
Collapse
|