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Chang YC, Reddy MV, Tsukiori Y, Mawatari Y, Choi D. Production of polyhydroxyalkanoates using sewage and cheese whey. Heliyon 2023; 9:e23130. [PMID: 38144304 PMCID: PMC10746463 DOI: 10.1016/j.heliyon.2023.e23130] [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: 07/25/2023] [Revised: 11/14/2023] [Accepted: 11/27/2023] [Indexed: 12/26/2023] Open
Abstract
Recently, polyhydroxyalkanoates (PHAs) have been produced using raw sewage in our laboratory; however, the production concentrations are low. Therefore, this study aimed to enhance PHA production by applying different strategies. PHA production was higher in sewage-containing medium than in mineral salt medium and was enhanced 22-fold after glucose supplementation. A relatively high degree of glucose consumption (83.6 ± 1.59 %) was also achieved. Bacteria incubated with cheese whey diluted with sewage showed higher PHA production than bacteria incubated with cheese whey diluted with distilled water did. The expression of the PHA synthase gene (phaC) was evaluated via real-time polymerase chain reaction using low- and high-carbon-containing sewage. Relatively higher phaC expression levels were observed in high-carbon-containing sewage but at lower nitrogen concentrations. The characteristics of the produced PHA were comparable to those of standard PHA. Therefore, this study revealed that the bacterium Bacillus sp. CYR1 can produce PHA from low- or high-carbon-containing wastewater.
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Affiliation(s)
- Young-Cheol Chang
- Course of Chemical and Biological Engineering, Division of Sustainable and Environmental Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - M. Venkateswar Reddy
- Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO, 80523, USA
| | - Yusei Tsukiori
- Course of Chemical and Biological Engineering, Division of Sustainable and Environmental Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - Yasuteru Mawatari
- Research Center for Environmentally Friendly Materials Engineering, Muroran Institute of Technology, Hokkaido, 050-8585, Japan
| | - DuBok Choi
- Faculty of Advanced Industry Convergence, Chosun University, Gwangju, 61452, South Korea
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Varghese VK, Poddar BJ, Shah MP, Purohit HJ, Khardenavis AA. A comprehensive review on current status and future perspectives of microbial volatile fatty acids production as platform chemicals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152500. [PMID: 34968606 DOI: 10.1016/j.scitotenv.2021.152500] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/26/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Volatile fatty acids (VFA), the secondary metabolite of microbial fermentation, are used in a wide range of industries for production of commercially valuable chemicals. In this review, the fermentative production of VFAs by both pure as well mixed microbial cultures is highlighted along with the strategies for enhancing the VFA production through innovations in existing approaches. Role of conventionally applied tools for the optimization of operational parameters such as pH, temperature, retention time, organic loading rate, and headspace pressure has been discussed. Furthermore, a comparative assessment of above strategies on VFA production has been done with alternate developments such as co-fermentation, substrate pre-treatment, and in situ removal from fermented broth. The review also highlights the applications of different bioreactor geometries in the optimum production of VFAs and how metagenomic tools could provide a detailed insight into the microbial communities and their functional attributes that could be subjected to metabolic engineering for the efficient production of VFAs.
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Affiliation(s)
- Vijay K Varghese
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur 440020, India
| | - Bhagyashri J Poddar
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur 440020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Maulin P Shah
- Industrial Waste Water Research Lab, Division of Applied and Environmental Microbiology Lab, Enviro Technology Ltd., Ankleshwar 393002, India
| | - Hemant J Purohit
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur 440020, India
| | - Anshuman A Khardenavis
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur 440020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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Guzik M, Witko T, Steinbüchel A, Wojnarowska M, Sołtysik M, Wawak S. What Has Been Trending in the Research of Polyhydroxyalkanoates? A Systematic Review. Front Bioeng Biotechnol 2020; 8:959. [PMID: 33014998 PMCID: PMC7513618 DOI: 10.3389/fbioe.2020.00959] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 07/24/2020] [Indexed: 12/24/2022] Open
Abstract
Over the past decades, enormous progress has been achieved with regard to research on environmentally friendly polymers. One of the most prominent families of such biopolymers are bacterially synthesized polyhydroxyalkanoates (PHAs) that have been known since the 1920s. However, only as recent as the 1990s have extensive studies sprung out exponentially in this matter. Since then, different areas of exploration of these intriguing materials have been uncovered. However, no systematic review of undertaken efforts has been conducted so far. Therefore, we have performed an unbiased search of up-to-date literature to reveal trending topics in the research of PHAs over the past three decades by data mining of 2,227 publications. This allowed us to identify eight past and current trends in this area. Our study provides a comprehensive review of these trends and speculates where PHA research is heading.
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Affiliation(s)
- Maciej Guzik
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Kraków, Poland
| | - Tomasz Witko
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Kraków, Poland
| | - Alexander Steinbüchel
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, Münster, Germany
- Environmental Sciences Department, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Magdalena Wojnarowska
- Department of Product Technology and Ecology, Cracow University of Economics, Kraków, Poland
| | - Mariusz Sołtysik
- Department of Management Process, Cracow University of Economics, Kraków, Poland
| | - Sławomir Wawak
- Department of Management Process, Cracow University of Economics, Kraków, Poland
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Chen Y, Li M, Meng F, Yang W, Chen L, Huo M. Optimal poly (3-hydroxybutyrate/3-hydroxyvalerate) biosynthesis by fermentation liquid from primary and waste activated sludge. ENVIRONMENTAL TECHNOLOGY 2014; 35:1791-1801. [PMID: 24956772 DOI: 10.1080/09593330.2014.882993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this paper the production of poly (3-hydroxybutyrate/3-hydroxyvalerate) (PHBV) with activated sludge was investigated by using the fermentation liquid from primary sludge (PS) and waste activated sludge (WAS) as carbon source. First, the suitable concentration and ratio of acetic to propionic (acetic/propionic) for PHBV synthesis with desired hydroxyvalerate (HV) fraction was determined. Then, the conditions for producing fermentation liquid with the required acetic/propionic from the PS/WAS mixture were optimized. Finally, this optimized fermentation liquid was used as the carbon source for PHBV synthesis by the aerobic feeding and discharge process. The PHBV content in the sludge reached 65.5%, with 47.8% (mol-C based) of HV unit content, and the corresponding polyhydroxyalkanoates yield per litre of acclimated sludge was 1.44 g/L. This was the first optimal PHBV biosynthesis reported by using activated sludge as the microbe and sludge fermentation liquid as the carbon source. Polymerase chain reaction-based 454 pyrosequencing analysis revealed that Thauera strains were the predominant species in the PHBV biosynthesis system.
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Ince O, Basaka B, Inceb BK, Cetecioglua Z, Celikkolb S, Kolukirik M. Effect of nitrogen deficiency during SBR operation on PHA storage and microbial diversity. ENVIRONMENTAL TECHNOLOGY 2012; 33:1827-1837. [PMID: 23240176 DOI: 10.1080/09593330.2011.634441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, changes in microbial diversity and polyhydroxyalkanoate storage ability of activated sludge under aerobic dynamic feeding conditions were investigated. Two sequencing batch reactors were operated with and without nitrogen limitation, by applying a moderate sludge retention time. Polymer storage abilities of the biomasses were improved significantly under dynamic conditions, in terms of specific polymer storage rate, polymer storage yield and polymer content of activated sludge. Moreover, aerobic dynamic feeding conditions together with nutrient limitation further improved the storage ability of the mixed population. Polymer storage yields of the biomass enriched under nitrogen-sufficient and nitrogen-deficient conditions were 0.43 and 0.61 Cmmol PHA/Cmmol substrate, respectively. This study also contributes to the knowledge of activated sludge microbiology, providing detailed information about temporal changes in community structure under dynamic conditions. Microbial community structure was determined by 16S rDNA clone library construction. Also changes in communities under different operating conditions were monitored by DGGE analysis based on bacterial 16S rDNA. The beta subclass of Proteobacteria was the most abundant phylum in both reactors during the operation periods. Changes in the community structure occurred in terms of relative abundance of the operational taxonomic units (OTUs) rather than the OTU types present in the system.
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Affiliation(s)
- Orhan Ince
- Department of Environmental Engineering, Istanbul Technical University, 34469, Istanbul, Turkey.
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Mumtaz T, Yahaya NA, Abd-Aziz S, Abdul Rahman N, Yee PL, Shirai Y, Hassan MA. Turning waste to wealth-biodegradable plastics polyhydroxyalkanoates from palm oil mill effluent – a Malaysian perspective. JOURNAL OF CLEANER PRODUCTION 2010; 18:1393-1402. [DOI: 10.1016/j.jclepro.2010.05.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Gasser I, Müller H, Berg G. Ecology and characterization of polyhydroxyalkanoate-producing microorganisms on and in plants. FEMS Microbiol Ecol 2009; 70:142-50. [DOI: 10.1111/j.1574-6941.2009.00734.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Maeda T, Yoshimura T, Shimazu T, Shirai Y, Ogawa HI. Enhanced production of lactic acid with reducing excess sludge by lactate fermentation. JOURNAL OF HAZARDOUS MATERIALS 2009; 168:656-663. [PMID: 19286312 DOI: 10.1016/j.jhazmat.2009.02.067] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Revised: 02/12/2009] [Accepted: 02/12/2009] [Indexed: 05/27/2023]
Abstract
The development of a facile technology for utilizing effectively and/or reducing excess sludge is one of the urgent problems since a large quantity of sewage sludge is formed by activated sludge processes. Excess sludge containing 50mM sucrose was fermented at 50 degrees C using endogenous bacteria in excess sludge, resulting in a high lactic acid production (8.45 g/L) and in an increased sludge reduction (38.2%). Conversion rate to lactic acid was up to 106.0% by standard fermentation at 50 degrees C compared to 43.8% at 30 degrees C and this phenomenon that conversion rate was higher was observed only at 50 degrees C as the fermentation at less or more than 50 degrees C had lower conversion rate than that at 50 degrees C. Lactic acid bacteria increased at 50 degrees C during 1-d fermentation whereas the number of total viable bacteria only increased slightly, indicating that lactic acid bacteria in sludge at 50 degrees C were preferentially able to utilize the sucrose for producing lactic acid. Finally, pH-vibration fermentation at 50 degrees C enabled to completely consume residual sucrose in the normal fermentation, resulting in the maximum production of lactic acid. Lactate fermentation by a purely cultured lactic acid bacterium TS1 with autoclaved excess sludge containing 50mM sucrose had more than 100% of conversion rate to lactic acid, indicating that a part of sludge was converted into lactic acid during the fermentation. Our technique is useful as a facile engineering for reducing excess sludge concomitantly with producing lactic acid by lactate fermentation.
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Affiliation(s)
- Toshinari Maeda
- Department of Biological Functions and Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Japan
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Khardenavis AA, Vaidya AN, Kumar MS, Chakrabarti T. Utilization of molasses spentwash for production of bioplastics by waste activated sludge. WASTE MANAGEMENT (NEW YORK, N.Y.) 2009; 29:2558-2565. [PMID: 19500968 DOI: 10.1016/j.wasman.2009.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Revised: 03/16/2009] [Accepted: 04/19/2009] [Indexed: 05/27/2023]
Abstract
Present study describes the treatment of molasses spentwash and its use as a potential low cost substrate for production of biopolymer polyhydroxybutyrate (PHB) by waste activated sludge. Fluorescence microscopy revealed the presence of PHB granules in sludge biomass which was further confirmed by fourier transform-infra-red spectroscopy (FT-IR) and (13)C nuclear magnetic resonance (NMR). The processing of molasses spentwash was carried out for attaining different ratios of carbon and nitrogen (C:N). Highest chemical oxygen demand (COD) removal and PHB accumulation of 60% and 31% respectively was achieved with raw molasses spentwash containing inorganic nitrogen (C:N ratio=28) followed by COD removal of 52% and PHB accumulation of 28% for filtered molasses containing inorganic nitrogen (C:N ratio=29). PHB production yield (Y(p/s)) was highest (0.184 g g(-1) COD consumed) for deproteinized spentwash supplemented with nitrogen. In contrast, the substrate consumption and product formation were higher in case of raw spentwash. Though COD removal was lowest from deproteinized spentwash, evaluation of kinetic parameters suggested higher rates of conversion of available carbon to biomass and PHB. Thus the process provided dual benefit of conversion of two wastes viz. waste activated sludge and molasses spentwash into value-added product-PHB.
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Affiliation(s)
- Anshuman A Khardenavis
- Environmental Genomics Unit, National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440 020, India.
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