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Costa P, Basaglia M, Casella S, Kennes C, Favaro L, Carmen Veiga M. Autotrophic production of polyhydroxyalkanoates using acidogenic-derived H 2 and CO 2 from fruit waste. BIORESOURCE TECHNOLOGY 2023; 390:129880. [PMID: 37852509 DOI: 10.1016/j.biortech.2023.129880] [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: 09/15/2023] [Revised: 10/14/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023]
Abstract
The environmental concerns regarding fossil plastics call for alternative biopolymers such as polyhydroxyalkanoates (PHAs) whose manufacturing costs are however still too elevated. Autotrophic microbes like Cupriavidus necator, able to convert CO2 and H2 into PHAs, offer an additional strategy. Typically, the preferred source for CO2 and H2 are expensive pure gases or syngas, which has toxic compounds for most PHAs-accumulating strains. In this work, for the first time, H2 and CO2 originating from an acidogenic reactor were converted autotrophically into poly(3-hydroxybutyrate) P(3HB). During the first stage, a mixed microbial community continuously catabolized melon waste into H2 (26.7 %) and CO2 (49.2 %) that were then used in a second bioreactor by C. necator DSM 545 to accumulate 1.7 g/L P(3HB). Additionally, the VFAs (13 gCOD/L) produced during acidogenesis were processed into 2.7 g/L of P(3HB-co-3HV). This is the first proof-of-concept of using acidogenic-derived H2 and CO2 from fruit waste to produce PHAs.
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Affiliation(s)
- Paolo Costa
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), Waste to Bioproducts-Lab, Università di Padova, Agripolis, Viale dell'Università 16, Legnaro, Padua 35020, Italy; Chemical Engineering Laboratory, Faculty of Sciences and Centre for Advanced Scientific Research (CICA), University of A Coruña, Rúa da Fraga 10, Coruña 15008 A, Spain
| | - Marina Basaglia
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), Waste to Bioproducts-Lab, Università di Padova, Agripolis, Viale dell'Università 16, Legnaro, Padua 35020, Italy
| | - Sergio Casella
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), Waste to Bioproducts-Lab, Università di Padova, Agripolis, Viale dell'Università 16, Legnaro, Padua 35020, Italy
| | - Christian Kennes
- Chemical Engineering Laboratory, Faculty of Sciences and Centre for Advanced Scientific Research (CICA), University of A Coruña, Rúa da Fraga 10, Coruña 15008 A, Spain
| | - Lorenzo Favaro
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), Waste to Bioproducts-Lab, Università di Padova, Agripolis, Viale dell'Università 16, Legnaro, Padua 35020, Italy.
| | - Maria Carmen Veiga
- Chemical Engineering Laboratory, Faculty of Sciences and Centre for Advanced Scientific Research (CICA), University of A Coruña, Rúa da Fraga 10, Coruña 15008 A, Spain
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Polyhydroxyalkanoate Production from Fruit and Vegetable Waste Processing. Polymers (Basel) 2022; 14:polym14245529. [PMID: 36559896 PMCID: PMC9781074 DOI: 10.3390/polym14245529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Traditional plastics represent a tremendous threat to the environment because of increases in polluting manufacturing as well as their very extended degradation time. Polyhydroxyalkanoates (PHAs) are polymers with similar performance to plastic but are compostable and synthesizable from renewable sources and therefore could be a replacement for fossil-based plastics. However, their production costs are still too high, thus demanding the investigation of new and cheap substrates. In this sense, agricultural wastes are attractive because they are inexpensive and largely available. Specifically, fruit and vegetables are rich in sugars that could be fermented into PHAs. In this work two strains, Cupriavidus necator DSM 545 and Hydrogenophaga pseudoflava DSM 1034, well-known PHA-producing microbes, were screened for their ability to grow and accumulate PHAs. Ten different fruit and vegetable processing waste streams, never before reported in combination with these strains, were tested. Residues from red apple and melon were found to be the most suitable feedstocks for PHA production. Under specific selected conditions, C. necator DSM 545 accumulated up to 7.4 and 4.3 g/L of 3-hydroxybutyrate (3HB) from red apple and melon, respectively. Copolymer production was also obtained from melon. These results confirm the attractiveness of food processing waste as a promising candidate for PHA production. Ultimately, these novel substrates draw attention for future studies on process optimization and upscaling with C. necator.
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Kaniapan S, Pasupuleti J, Patma Nesan K, Abubackar HN, Umar HA, Oladosu TL, Bello SR, Rene ER. A Review of the Sustainable Utilization of Rice Residues for Bioenergy Conversion Using Different Valorization Techniques, Their Challenges, and Techno-Economic Assessment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:3427. [PMID: 35329114 PMCID: PMC8953080 DOI: 10.3390/ijerph19063427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/06/2022] [Accepted: 03/08/2022] [Indexed: 11/24/2022]
Abstract
The impetus to predicting future biomass consumption focuses on sustainable energy, which concerns the non-renewable nature of fossil fuels and the environmental challenges associated with fossil fuel burning. However, the production of rice residue in the form of rice husk (RH) and rice straw (RS) has brought an array of benefits, including its utilization as biofuel to augment or replace fossil fuel. Rice residue characterization, valorization, and techno-economic analysis require a comprehensive review to maximize its inherent energy conversion potential. Therefore, the focus of this review is on the assessment of rice residue characterization, valorization approaches, pre-treatment limitations, and techno-economic analyses that yield a better biofuel to adapt to current and future energy demand. The pre-treatment methods are also discussed through torrefaction, briquetting, pelletization and hydrothermal carbonization. The review also covers the limitations of rice residue utilization, as well as the phase structure of thermochemical and biochemical processes. The paper concludes that rice residue is a preferable sustainable biomass option for both economic and environmental growth.
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Affiliation(s)
- Sivabalan Kaniapan
- Institute of Sustainable Energy, Universiti Tenaga Nasional, Kajang 43000, Malaysia;
| | - Jagadeesh Pasupuleti
- Institute of Sustainable Energy, Universiti Tenaga Nasional, Kajang 43000, Malaysia;
| | - Kartikeyan Patma Nesan
- Chemical Engineering Department, Universiti Teknologi Petronas, Seri Iskandar 32610, Malaysia
| | | | - Hadiza Aminu Umar
- Mechanical Engineering Department, Bayero University Kano, Kano PMB 3011, Nigeria;
- Mechanical Engineering Department, Universiti Teknologi Petronas, Seri Iskandar 32610, Malaysia;
| | - Temidayo Lekan Oladosu
- Mechanical Engineering Department, Universiti Teknologi Petronas, Seri Iskandar 32610, Malaysia;
| | - Segun R. Bello
- Department of Agricultural and Bioenvironmental Engineering Technology, Federal College of Agriculture Ishiagu, Ishiagu 402143, Nigeria;
| | - Eldon R. Rene
- Department of Environmental Engineering and Water Technology, IHE Delft Institute for Water Education, P.O. Box 3015, 2601 DA Delft, The Netherlands;
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