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Shenbagamuthuraman V, Kasianantham N. Microwave irradiation pretreated fermentation of bioethanol production from Chlorella vulgaris Biomasses: Comparative analysis of response surface methodology and artificial neural network techniques. BIORESOURCE TECHNOLOGY 2023; 390:129867. [PMID: 37832853 DOI: 10.1016/j.biortech.2023.129867] [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: 09/11/2023] [Revised: 10/10/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023]
Abstract
Bioethanol is a promising biofuel for replacing gasoline due to its sustainability. This work uses microwave irradiation and acid hydrolysis to produce bioethanol from Chlorella vulgaris. The hydrolysis procedure used 1%-3% sulfuric acid (H2SO4). The maximum output of reducing sugar was 6.773 g/L after 5 min of irradiation. This study used RSM and ANN to optimize bioethanol production. The study predicted bioethanol yield using three factors: fermentation duration (12-36 h), temperature (28-32 °C), and inoculum concentration (0.5-1.5 g/L). The highest bioethanol yield was achieved using fermentation conditions of 36 h, 30 °C temperature, and 1.5 g/L inoculum concentration. The ANN model predicted the best ethanol output compared to the RSM model. The leftover biomass from biofuel synthesis was characterized for its potential for other energy production. The current study examined the feasibility of employing biomass in an environmentally sustainable manner to enhance the production of biofuels.
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Affiliation(s)
- V Shenbagamuthuraman
- Engine Testing Laboratory, School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Nanthagopal Kasianantham
- Engine Testing Laboratory, School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
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Agarwalla A, Komandur J, Mohanty K. Current trends in the pretreatment of microalgal biomass for efficient and enhanced bioenergy production. BIORESOURCE TECHNOLOGY 2023; 369:128330. [PMID: 36403907 DOI: 10.1016/j.biortech.2022.128330] [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: 09/30/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 06/16/2023]
Abstract
Biofuels from microalgal biomass is among some of the promising sustainable energy technologies that can significantly replace the dependence on fossil fuels worldwide due to potentiality to lower CO2 emissions. Nevertheless, the extraction of biomolecules for biofuel generation is inhibited by the rigidity of the cellular structure of microalgal biomass. Various pretreatment strategies have been evaluated for their efficacy in microalgal cell wall disruption to enhance microalgal bioenergy production. However, the efficiency of the pretreatment methods depend on the particular species being treated due to the inherent variability of the composition of the cell wall. This paper reviews pretreatment strategies (mainly novel physical, chemical and physicochemical) employed in bioenergy generation from microalgal biomass, address existing constraints and provides prospects for economic and industrial-scale production. The authors have also discussed the different pretreatment methods used for biodiesel, bioethanol, and biohydrogen production.
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Affiliation(s)
- Ankit Agarwalla
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Janaki Komandur
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Kaustubha Mohanty
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India; School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India.
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Ren X, Liu Y, Fan C, Hong H, Wu W, Zhang W, Wang Y. Production, Processing, and Protection of Microalgal n-3 PUFA-Rich Oil. Foods 2022; 11:foods11091215. [PMID: 35563938 PMCID: PMC9101592 DOI: 10.3390/foods11091215] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 02/01/2023] Open
Abstract
Microalgae have been increasingly considered as a sustainable “biofactory” with huge potentials to fill up the current and future shortages of food and nutrition. They have become an economically and technologically viable solution to produce a great diversity of high-value bioactive compounds, including n-3 polyunsaturated fatty acids (PUFA). The n-3 PUFA, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), possess an array of biological activities and positively affect a number of diseases, including cardiovascular and neurodegenerative disorders. As such, the global market of n-3 PUFA has been increasing at a fast pace in the past two decades. Nowadays, the supply of n-3 PUFA is facing serious challenges as a result of global warming and maximal/over marine fisheries catches. Although increasing rapidly in recent years, aquaculture as an alternative source of n-3 PUFA appears insufficient to meet the fast increase in consumption and market demand. Therefore, the cultivation of microalgae stands out as a potential solution to meet the shortages of the n-3 PUFA market and provides unique fatty acids for the special groups of the population. This review focuses on the biosynthesis pathways and recombinant engineering approaches that can be used to enhance the production of n-3 PUFA, the impact of environmental conditions in heterotrophic cultivation on n-3 PUFA production, and the technologies that have been applied in the food industry to extract and purify oil in microalgae and protect n-3 PUFA from oxidation.
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Affiliation(s)
- Xiang Ren
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
- Correspondence: (X.R.); (Y.W.); Tel.: +86-411-65864645 (X.R.); +1-902-566-7953 (Y.W.)
| | - Yanjun Liu
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Chao Fan
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Hao Hong
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Wenzhong Wu
- INNOBIO Corporation Limited, No. 49, DDA, Dalian 116600, China; (Y.L.); (C.F.); (H.H.); (W.W.)
| | - Wei Zhang
- DeOxiTech Consulting, 30 Cloverfield Court, Dartmouth, NS B2W 0B3, Canada;
| | - Yanwen Wang
- Aquatic and Crop Resource Development Research Centre, National Research Council of Canada, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
- Correspondence: (X.R.); (Y.W.); Tel.: +86-411-65864645 (X.R.); +1-902-566-7953 (Y.W.)
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Abstract
Several microalgae species have been exploited due to their great biotechnological potential for the production of a range of biomolecules that can be applied in a large variety of industrial sectors. However, the major challenge of biotechnological processes is to make them economically viable, through the production of commercially valuable compounds. Most of these compounds are accumulated inside the cells, requiring efficient technologies for their extraction, recovery and purification. Recent improvements approaching physicochemical treatments (e.g., supercritical fluid extraction, ultrasound-assisted extraction, pulsed electric fields, among others) and processes without solvents are seeking to establish sustainable and scalable technologies to obtain target products from microalgae with high efficiency and purity. This article reviews the currently available approaches reported in literature, highlighting some examples covering recent granted patents for the microalgae’s components extraction, recovery and purification, at small and large scales, in accordance with the worldwide trend of transition to bio-based products.
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Nitsos C, Filali R, Taidi B, Lemaire J. Current and novel approaches to downstream processing of microalgae: A review. Biotechnol Adv 2020; 45:107650. [PMID: 33091484 DOI: 10.1016/j.biotechadv.2020.107650] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 10/02/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023]
Abstract
Biotechnological application of microalgae cultures at large scale has significant potential in the various fields of biofuels, food and feed, cosmetic, pharmaceutic, environmental remediation and water treatment. Despite this great potential application, industrialisation of microalgae culture and valorisation is still faced with serious remaining challenges in culture scale-up, harvesting and extraction of target molecules. This review presents a general summary of current techniques for harvesting and extraction of biomolecules from microalgae, their relative merits and potential for industrial application. The cell wall composition and its impact on microalgae cell disruption is discussed. Additionally, more recent progress and promising experimental methods and studies are summarised that would allow the reader to further investigate the state of the art. A final survey of energetic assessments of the different techniques is also made. Bead milling and high-pressure homogenisation seem to give clear advantages in terms of target high value compounds extraction from microalgae, with enzyme hydrolysis as a promising emerging technique. Future industrialisation of microalgae for high scale biotechnological processing will require the establishment of universal comparison-standards that would enable easy assessment of one technique against another.
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Affiliation(s)
- Christos Nitsos
- LGPM, CentraleSupélec, SFR Condorcet FR CNRS 3417, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), Université paris-Saclay, 3 rue des Rouges Terres, 51110 Pomacle, France.
| | - Rayen Filali
- LGPM, CentraleSupélec, SFR Condorcet FR CNRS 3417, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), Université paris-Saclay, 3 rue des Rouges Terres, 51110 Pomacle, France.
| | - Behnam Taidi
- LGPM, CentraleSupélec, Unierstiy of Paris Sacaly, Bât Gustave Eiffel, 3 rue Joliot Curie, 91190 Gif-sur-Yvette, France.
| | - Julien Lemaire
- LGPM, CentraleSupélec, SFR Condorcet FR CNRS 3417, Centre Européen de Biotechnologie et de Bioéconomie (CEBB), Université paris-Saclay, 3 rue des Rouges Terres, 51110 Pomacle, France.
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Han SI, Chang SH, Lee C, Jeon MS, Heo YM, Kim S, Choi YE. Astaxanthin biosynthesis promotion with pH shock in the green microalga, Haematococcus lacustris. BIORESOURCE TECHNOLOGY 2020; 314:123725. [PMID: 32615445 DOI: 10.1016/j.biortech.2020.123725] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/17/2020] [Accepted: 06/19/2020] [Indexed: 06/11/2023]
Abstract
In this study, the use of pH shock to improve astaxanthin synthesis in Haematococcus lacustris was investigated. It has been found that pH shock (pH = 4.5, 60 s) imposes stress in the cells and induces physiological changes, which result in astaxanthin accumulation. The optimal acid-base combination of pH shock was H2SO4-KOH, which increased the astaxanthin content per cell to 39 ± 6.92% than those of the control. In addition, pH shock can be applied simultaneously with the other inductive strategies such as high irradiance and carbon source supply. When high irradiance was applied simultaneously with pH shock, astaxanthin yield was increased 65 ± 0.541% than control. In addition, astaxanthin content per cell was increased 105 ± 6.66% than those of the control, with the concomitant application of carbon source addition with pH shock. Herein, these novel findings provide a useful technique for producing astaxanthin using H. lacustris.
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Affiliation(s)
- Sang-Il Han
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | | | - Changsu Lee
- Division of Applied Life Sciences (BK21 Plus), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Min Seo Jeon
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Young Mok Heo
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sok Kim
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yoon-E Choi
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea.
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Diversity of Trichoderma spp. in Marine Environments and Their Biological Potential for Sustainable Industrial Applications. SUSTAINABILITY 2020. [DOI: 10.3390/su12104327] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Microorganisms are regarded as a sustainable source of biologically active molecules. Among them, Trichoderma spp. have been an attractive source of biological compounds. However, the study of marine-derived Trichoderma has developed slowly because of the difficulty in isolating the fungi. In our study, 30 strains of marine-derived Trichoderma were identified through the translation elongation factor 1-alpha (EF1α) sequences, and their biological activities, such as antioxidant activity by ABTS and DPPH assays, antifungal activity against Asteromyces cruciatus and Lindra thalassiae, and tyrosinase inhibition activity, were investigated. As a result, the 30 marine Trichoderma species were classified into 21 taxa, including three new species candidates. Three strains of T. asperellum showed the highest ABTS radical scavenging activity and antifungal activity. T. bissettii SFC20170821-M05 and T. guizhouense SFC20180619-M23 showed notable DPPH radical scavenging activity and tyrosinase inhibition activity, respectively. This study showed the potential of marine-derived Trichoderma as a source of bioactive compounds.
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Nunes MC, Graça C, Vlaisavljević S, Tenreiro A, Sousa I, Raymundo A. Microalgal cell disruption: Effect on the bioactivity and rheology of wheat bread. ALGAL RES 2020. [DOI: 10.1016/j.algal.2019.101749] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Bernaerts TM, Gheysen L, Foubert I, Hendrickx ME, Van Loey AM. The potential of microalgae and their biopolymers as structuring ingredients in food: A review. Biotechnol Adv 2019; 37:107419. [DOI: 10.1016/j.biotechadv.2019.107419] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 12/11/2022]
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Coelho D, Lopes PA, Cardoso V, Ponte P, Brás J, Madeira MS, Alfaia CM, Bandarra NM, Fontes CMGA, Prates JAM. A two-enzyme constituted mixture to improve the degradation of Arthrospira platensis microalga cell wall for monogastric diets. J Anim Physiol Anim Nutr (Berl) 2019; 104:310-321. [PMID: 31680348 PMCID: PMC7004008 DOI: 10.1111/jpn.13239] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 09/03/2019] [Accepted: 09/16/2019] [Indexed: 12/21/2022]
Abstract
The main goal of this study was to test a rational combination of pre‐selected carbohydrate‐active enzymes (CAZymes) and sulphatases, individually or in combination, in order to evaluate its capacity to disrupt Arthrospira platensis cell wall, allowing the release of its valuable nutritional bioactive compounds. By the end, a two‐enzyme constituted mixture (Mix), composed by a lysozyme and a α‐amylase, was incubated with A. platensis suspension. The microalga cell wall disruption was evaluated through the amount of reducing sugars released from the cell wall complemented with the oligosaccharide profile by HPLC. An increase of the amount of reducing sugars up to 2.42 g/L in microalgae treated with the Mix relative to no treatment (p < .05), as well as a 7‐fold increase of oligosaccharides amount (p < .001), were obtained. With resort of fluorescence microscopy, a 36% reduction of fluorescence intensity (p < .001) was observed using Calcofluor White staining. In the supernatant, the Mix caused a 1.34‐fold increase in protein content (p = .018) relative to the control. Similarly, n‐6 polyunsaturated fatty acids (PUFA) (p = .007), in particular 18:2n‐6 (p = .016), monounsaturated fatty acids (MUFA) (p = .049) and chlorophyll a (p = .025) contents were higher in the supernatant of microalgae treated with the enzyme mixture in relation to the control. Taken together, these results point towards the disclosure of a novel two‐enzyme mixture able to partial degrade A. platensis cell wall, improving its nutrients bioavailability for monogastric diets with the cost‐effective advantage use of microalgae in animal feed industry.
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Affiliation(s)
- Diogo Coelho
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Paula A Lopes
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Vânia Cardoso
- NZYTech - Genes and Enzymes, Estrada do Paço do Lumiar, Campus do Lumiar, Lisboa, Portugal
| | - Patrícia Ponte
- NZYTech - Genes and Enzymes, Estrada do Paço do Lumiar, Campus do Lumiar, Lisboa, Portugal
| | - Joana Brás
- NZYTech - Genes and Enzymes, Estrada do Paço do Lumiar, Campus do Lumiar, Lisboa, Portugal
| | - Marta S Madeira
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Cristina M Alfaia
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal
| | - Narcisa M Bandarra
- DivAV, Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, Lisboa, Portugal
| | - Carlos M G A Fontes
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal.,NZYTech - Genes and Enzymes, Estrada do Paço do Lumiar, Campus do Lumiar, Lisboa, Portugal
| | - José A M Prates
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Lisboa, Portugal.,NZYTech - Genes and Enzymes, Estrada do Paço do Lumiar, Campus do Lumiar, Lisboa, Portugal
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Evaluation of disruption/permeabilization methodologies for Microcystis aeruginosa as alternatives to obtain high yields of microcystin release. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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