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Arashiro L, Ferrer I, Pániker CC, Gómez-Pinchetti JL, Rousseau DPL, Van Hulle SWH, Garfí M. Natural Pigments and Biogas Recovery from Microalgae Grown in Wastewater. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2020; 8:10691-10701. [PMID: 32953285 PMCID: PMC7493222 DOI: 10.1021/acssuschemeng.0c01106] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 05/05/2020] [Indexed: 05/09/2023]
Abstract
This study assessed the recovery of natural pigments (phycobiliproteins) and bioenergy (biogas) from microalgae grown in wastewater. A consortium of microalgae, mainly composed by Nostoc, Phormidium, and Geitlerinema, known to have high phycobiliproteins content, was grown in photobioreactors. The growth medium was composed by secondary effluent from a high rate algal pond (HRAP) along with the anaerobic digestion centrate, which aimed to enhance the N/P ratio, given the lack of nutrients in the secondary effluent. Additionally, the centrate is still a challenging anaerobic digestion residue since the high nitrogen concentrations have to be removed before disposal. Removal efficiencies up to 52% of COD, 86% of NH4 +-N, and 100% of phosphorus were observed. The biomass composition was monitored over the experimental period in order to ensure stable cyanobacterial dominance in the mixed culture. Phycocyanin and phycoerythrin were extracted from harvested biomass, achieving maximum concentrations of 20.1 and 8.1 mg/g dry weight, respectively. The residual biomass from phycobiliproteins extraction was then used to produce biogas, with final methane yields ranging from 159 to 199 mL CH4/g VS. According to the results, by combining the extraction of pigments and the production of biogas from residual biomass, we would not only obtain high-value compounds, but also more energy (around 5-10% higher), as compared to the single recovery of biogas. The proposed process poses an example of resource recovery from biomass grown in wastewater, moving toward a circular bioeconomy.
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Affiliation(s)
- Larissa
T. Arashiro
- GEMMA
- Group of Environmental Engineering and Microbiology, Department
of Civil and Environmental
Engineering, Universitat Politècnica
de Catalunya · BarcelonaTech, c/Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain
- Laboratory
for Industrial Water and Ecotechnology (LIWET), Department of Green
Chemistry and Technology, Ghent University
Campus Kortrijk, Graaf
Karel de Goedelaan 5, B-8500 Kortrijk, Belgium
| | - Ivet Ferrer
- GEMMA
- Group of Environmental Engineering and Microbiology, Department
of Civil and Environmental
Engineering, Universitat Politècnica
de Catalunya · BarcelonaTech, c/Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain
- Tel: +34 934016463.
| | - Catalina C. Pániker
- GEMMA
- Group of Environmental Engineering and Microbiology, Department
of Civil and Environmental
Engineering, Universitat Politècnica
de Catalunya · BarcelonaTech, c/Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain
| | - Juan Luis Gómez-Pinchetti
- Spanish
Bank of Algae, Institute of Oceanography and Global Change, University of Las Palmas de Gran Canaria, Muelle de Taliarte, 35214 Telde, Canary Islands Spain
| | - Diederik P. L. Rousseau
- Laboratory
for Industrial Water and Ecotechnology (LIWET), Department of Green
Chemistry and Technology, Ghent University
Campus Kortrijk, Graaf
Karel de Goedelaan 5, B-8500 Kortrijk, Belgium
| | - Stijn W. H. Van Hulle
- Laboratory
for Industrial Water and Ecotechnology (LIWET), Department of Green
Chemistry and Technology, Ghent University
Campus Kortrijk, Graaf
Karel de Goedelaan 5, B-8500 Kortrijk, Belgium
| | - Marianna Garfí
- GEMMA
- Group of Environmental Engineering and Microbiology, Department
of Civil and Environmental
Engineering, Universitat Politècnica
de Catalunya · BarcelonaTech, c/Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain
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Ali Kubar A, Cheng J, Guo W, Kumar S, Song Y. Development of a single helical baffle to increase CO 2 gas and microalgal solution mixing and Chlorella PY-ZU1 biomass yield. BIORESOURCE TECHNOLOGY 2020; 307:123253. [PMID: 32244074 DOI: 10.1016/j.biortech.2020.123253] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/22/2020] [Accepted: 03/24/2020] [Indexed: 06/11/2023]
Abstract
A single helical baffle (SHB), consisting of twisted turns, was developed to convert straight flow into spiral flow in a Chlorella PY-ZU1 open raceway pond (ORWP) bubbled with 15% CO2. Microalgal solution flowing through the SHB alternative helical interspaces generated whirling flow both vertically and horizontally, which decreased mixing and increased mass transfer rates. The optimized SHB had a pitch length to total SHB length ratio of 0.13 and SHB diameter to ORWP single channel width ratio of 0.30, which decreased mixing times and increased mass transfer coefficients by 41.1% and 38.4% respectively. SHB moved Chlorella PY-ZU1 from the ORWP bottom to the top, increasing light exposure for photosynthesis. Cellular electron transfer rates and photochemical efficiency (φPSII) increased by 18%, chlorophyll a content increased by 16% and variable to maximum fluorescence ratio increased by 13%. The microalgal biomass of SHB ORWP was 23% higher than that of conventional ORWP.
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Affiliation(s)
- Ameer Ali Kubar
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Jun Cheng
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Wangbiao Guo
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Santosh Kumar
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Yanmei Song
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
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Harnessing the Power of Mutagenesis and Adaptive Laboratory Evolution for High Lipid Production by Oleaginous Microalgae and Yeasts. SUSTAINABILITY 2020. [DOI: 10.3390/su12125125] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Oleaginous microalgae and yeasts represent promising candidates for large-scale production of lipids, which can be utilized for production of drop-in biofuels, nutraceuticals, pigments, and cosmetics. However, low lipid productivity and costly downstream processing continue to hamper the commercial deployment of oleaginous microorganisms. Strain improvement can play an essential role in the development of such industrial microorganisms by increasing lipid production and hence reducing production costs. The main means of strain improvement are random mutagenesis, adaptive laboratory evolution (ALE), and rational genetic engineering. Among these, random mutagenesis and ALE are straight forward, low-cost, and do not require thorough knowledge of the microorganism’s genetic composition. This paper reviews available mutagenesis and ALE techniques and screening methods to effectively select for oleaginous microalgae and yeasts with enhanced lipid yield and understand the alterations caused to metabolic pathways, which could subsequently serve as the basis for further targeted genetic engineering.
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54
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Zheng M, Ji X, He Y, Li Z, Wang M, Chen B, Huang J. Simultaneous fixation of carbon dioxide and purification of undiluted swine slurry by culturing Chlorella vulgaris MBFJNU-1. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.101866] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Microalgae – A green multi-product biorefinery for future industrial prospects. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101580] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
Interest in pigment composition of microalgae species is growing as new natural pigments sources are being sought. However, we still have a limited number of species of microalgae exploited to obtain these compounds. Considering these facts, the detailed composition of carotenoids and chlorophylls of two species of green microalgae (Chlorella sorokiniana and Scenedesmus bijuga) were determined for the first time by high-performance liquid chromatography coupled to diode array and mass spectrometry detectors (HPLC-PDA-MS/MS). A total of 17 different carotenoids were separated in all the extracts. Most of the carotenoids present in the two microalgae species are xanthophylls. C. sorokiniana presented 11 carotenoids (1408.46 μg g−1), and S. bijuga showed 16 carotenoids (1195.75 μg g−1). The main carotenoids detected in the two microalgae were all-trans-lutein and all-trans-β-carotene. All-trans-lutein was substantially higher in C. sorokiniana (59.01%), whereas all-trans-β-carotene was detected in higher quantitative values in S. bijuga (13.88%). Seven chlorophyll compounds were identified in both strains with different proportions in each species. Concentrations of chlorophyll representing 7.6% and 10.2% of the composition of the compounds present in the biomass of C. sorokiniana and S. bijuga, respectively. Relevant chlorophyll compounds are reported for the first time in these strains. The data obtained provide significant insights for microalgae pigment composition databases. The carotenoids and chlorophylls profile by HPLC-PDA-MS of microalgae is reported. Microalgae showed species-specific pigments profiles. 17 carotenoids and 7 chlorophylls were identified and quantified in details. The quantitative profile presented a prevalence of chlorophylls over carotenoids. Green microalgae are proposed as an interesting natural source of food pigments.
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A review of high value-added molecules production by microalgae in light of the classification. Biotechnol Adv 2020; 41:107545. [PMID: 32272160 DOI: 10.1016/j.biotechadv.2020.107545] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/06/2020] [Accepted: 03/27/2020] [Indexed: 12/17/2022]
Abstract
This work reviews applications of high added value molecules produced from microalgae. Older forms of valorization - health food and quality feed, polyunsaturated fatty acids, pigments, carbohydrates - are currently penetrating their markets. They are driven by desirable properties: texturer and dye for food industry, antioxidant for cosmetics and the appetite of the general public for biosourced compounds. Most recent developments, such as peptides, vitamins, polyphenols, phytosterols and phytohormones, are struggling to meet their market and reach economical competitiveness. Still they are pushed forward by the very powerful driver that is pharmaceutical industry. In addition this work also proposes to link microalgae phyla and related potential applications. This is done through highlighting of which bioactive compounds can be found in which phyla. While some seem to be restricted to aquaculture, Cyanobacteria, Chlorophyta and Rhodophyta show great promises.
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58
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Costa JAV, Freitas BCB, Moraes L, Zaparoli M, Morais MG. Progress in the physicochemical treatment of microalgae biomass for value-added product recovery. BIORESOURCE TECHNOLOGY 2020; 301:122727. [PMID: 31983577 DOI: 10.1016/j.biortech.2019.122727] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/27/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
Interest in microalgae-derived products is growing, mostly due to their unique characteristics and range of industrial applications. To obtain different products, one must employ specific pretreatments that retain the properties of the biologically active compounds extracted from microalgae biomass; thus, new extraction techniques require frequent upgrades. Due to increased interest in economically viable and ecologically friendly processes, new extraction methods that can be incorporated into microalgae biorefinery systems have become the main focus of research. Therefore, this review aims to address the potential applications, future prospects, and economic scenario of the new physicochemical treatments used in the extraction of bioactive microalgae compounds.
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Affiliation(s)
- Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande-RS, Brazil.
| | - Bárbara Catarina Bastos Freitas
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande-RS, Brazil
| | - Luiza Moraes
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande-RS, Brazil
| | - Munise Zaparoli
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande-RS, Brazil
| | - Michele Greque Morais
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande-RS, Brazil
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Prospects of integrating algae technologies into landfill leachate treatment. World J Microbiol Biotechnol 2020; 36:39. [PMID: 32095995 DOI: 10.1007/s11274-020-2810-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/11/2020] [Indexed: 12/11/2022]
Abstract
Landfilling of municipal waste, an environmental challenge worldwide, results in the continuous formation of significant amounts of leachate, which poses a severe contamination threat to ground and surface water resources. Landfill leachate (LL) is generated by rainwater percolating through disposed waste materials and must be treated effectively before safe discharge into the environment. LL contains numerous pollutants and toxic substances, such as dissolved organic matter, inorganic chemicals, heavy metals, and anthropogenic organic compounds. Currently, LL treatment is carried out by a combination of physical, chemical, and microbial technologies. Microalgae are now viewed as a promising sustainable addition to the repertoire of technologies for treating LL. Photosynthetic algae have been shown to grow in LL under laboratory conditions, while some species have also been employed in larger-scale LL treatments. Treating leachate with algae can contribute to sustainable waste management at existing landfills by remediating low-quality water for recycling and reuse and generating large amounts of algal biomass for cost-effective manufacturing of biofuels and bioproducts. In this review, we will examine LL composition, traditional leachate treatment technologies, LL toxicity to algae, and the potential of employing algae at LL treatment facilities. Emphasis is placed on how algae can be integrated with existing technologies for biological treatment of LL, turning leachate from an environmental liability to an asset that can produce value-added biofuels and bioproducts for the bioeconomy.
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61
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Hang LT, Mori K, Tanaka Y, Morikawa M, Toyama T. Enhanced lipid productivity of Chlamydomonas reinhardtii with combination of NaCl and CaCl2 stresses. Bioprocess Biosyst Eng 2020; 43:971-980. [DOI: 10.1007/s00449-020-02293-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 01/15/2020] [Indexed: 12/27/2022]
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62
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Arif M, Bai Y, Usman M, Jalalah M, Harraz FA, Al-Assiri MS, Li X, Salama ES, Zhang C. Highest accumulated microalgal lipids (polar and non-polar) for biodiesel production with advanced wastewater treatment: Role of lipidomics. BIORESOURCE TECHNOLOGY 2020; 298:122299. [PMID: 31706891 DOI: 10.1016/j.biortech.2019.122299] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 06/10/2023]
Abstract
Microalgal lipids consist of non-polar and polar lipids. Triacyleglyceride (TAG), a non-polar lipid, is convertible to biodiesel, whereas glycolipids and phospholipids are polar and not convertible to biodiesel owing to their high degree of unsaturation (polyunsaturated fatty acids), which makes the production process insufficient and expensive. In this review, microalgal species that contain the highest lipid content (≥40%) in the literature till 2019 are highlighted. The differentiation between non-polar and polar lipids and the limitations in the conversion of polar lipids to biodiesel are reported. The basic and advanced factors contributing to the accumulation of lipids convertible to biodiesel is discussed. Microalgal species including Scenedesmus obliquus, Ourococcus multisporus, Chlamydomonas pitschmannii, Micractinium reisseri, and Botryococcus braunii with high lipid content are potential candidates for biomass/biodiesel production and nutrient removal from wastewater. Application of lipidomics and transcriptomics to manipulate the lipid associated gene acetyl-CoA synthetase in microalgae improves the accumulative lipid content.
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Affiliation(s)
- Muhammad Arif
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, PR China; Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu, PR China
| | - Yanrui Bai
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - Muhammad Usman
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, PR China; Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu, PR China
| | - Mohammed Jalalah
- Promising Center for Sensors and Electronic Devices (PCSED) Najran University, Najran 11001, Saudi Arabia
| | - Farid A Harraz
- Promising Center for Sensors and Electronic Devices (PCSED) Najran University, Najran 11001, Saudi Arabia; Nanomaterials and Nanotechnology Department, Central Metallurgical Research and Development Institute (CMRDI), P.O. 87 Helwan, Cairo 11421, Egypt
| | - M S Al-Assiri
- Promising Center for Sensors and Electronic Devices (PCSED) Najran University, Najran 11001, Saudi Arabia
| | - Xiangkai Li
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, PR China
| | - El-Sayed Salama
- Department of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou 730000, Gansu, PR China
| | - Chunjiang Zhang
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, PR China.
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Joo HW, Ryu H, Chang YK. Hydrolysis of Golenkinia sp. by Using a Rotating Packed Bed Reactor and Regeneration of Solid Acid Catalyst. BIOTECHNOL BIOPROC E 2020. [DOI: 10.1007/s12257-019-0417-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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64
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Sohedein MNA, Wan-Mohtar WAAQI, Hui-Yin Y, Ilham Z, Chang JS, Supramani S, Siew-Moi P. Optimisation of biomass and lipid production of a tropical thraustochytrid Aurantiochytrium sp. UMACC-T023 in submerged-liquid fermentation for large-scale biodiesel production. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101496] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Molino A, Mehariya S, Iovine A, Casella P, Marino T, Karatza D, Chianese S, Musmarra D. Enhancing Biomass and Lutein Production From Scenedesmus almeriensis: Effect of Carbon Dioxide Concentration and Culture Medium Reuse. FRONTIERS IN PLANT SCIENCE 2020; 11:415. [PMID: 32373140 PMCID: PMC7186383 DOI: 10.3389/fpls.2020.00415] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 03/23/2020] [Indexed: 05/05/2023]
Abstract
The main purpose of this study is to investigate the effects of operative parameters and bioprocess strategies on the photo-autotrophic cultivation of the microalgae Scenedesmus almeriensis for lutein production. S. almeriensis was cultivated in a vertical bubble column photobioreactor (VBC-PBR) in batch mode and the bioactive compounds were extracted by accelerated solvent extraction with ethanol at 67°C and 10 MPa. The cultivation with a volume fraction of CO2 in the range 0-3.0%v/v showed that the highest biomass and lutein concentrations - 3.7 g/L and 5.71 mg/g, respectively - were measured at the highest CO2 concentration and using fresh growth medium. Recycling the cultivation medium from harvested microalgae resulted in decreased biomass and lutein content. The nutrient chemical composition analysis showed the highest consumption rates for nitrogen and phosphorus, with values higher than 80%, while sulfate and chloride were less consumed.
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Affiliation(s)
- Antonio Molino
- Department of Sustainability-CR Portici, ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Portici, Italy
| | - Sanjeet Mehariya
- Department of Sustainability-CR Portici, ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Portici, Italy
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy
| | - Angela Iovine
- Department of Sustainability-CR Portici, ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Portici, Italy
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy
| | - Patrizia Casella
- Department of Sustainability-CR Portici, ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Portici, Italy
| | - Tiziana Marino
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy
| | - Despina Karatza
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy
| | - Simeone Chianese
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy
- *Correspondence: Simeone Chianese,
| | - Dino Musmarra
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Aversa, Italy
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Koyande AK, Show PL, Guo R, Tang B, Ogino C, Chang JS. Bio-processing of algal bio-refinery: a review on current advances and future perspectives. Bioengineered 2019; 10:574-592. [PMID: 31668124 PMCID: PMC6844430 DOI: 10.1080/21655979.2019.1679697] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/16/2019] [Accepted: 10/03/2019] [Indexed: 02/08/2023] Open
Abstract
Microalgae biomass contains various useful bio-active components. Microalgae derived biodiesel has been researched for almost two decades. However, sole biodiesel extraction from microalgae is time-consuming and is not economically feasible due to competitive fossil fuel prices. Microalgae also contains proteins and carbohydrates in abundance. Microalgae are likewise utilized to extract high-value products such as pigments, anti-oxidants and long-chain polyunsaturated fatty acids which are useful in cosmetic, pharmaceutical and nutraceutical industry. These compounds can be extracted simultaneously or sequentially after biodiesel extraction to reduce the total expenditure involved in the process. This approach of bio-refinery is necessary to promote microalgae in the commercial market. Researchers have been keen on utilizing the bio-refinery approach to exploit the valuable components encased by microalgae. Apart from all the beneficial components housed by microalgae, they also help in reducing the anthropogenic CO2 levels of the atmosphere while utilizing saline or wastewater. These benefits enable microalgae as a potential source for bio-refinery approach. Although life-cycle analysis and economic assessment do not favor the use of microalgae biomass feedstock to produce biofuel and co-products with the existing techniques, this review still aims to highlight the beneficial components of microalgae and their importance to humans. In addition, this article also focuses on current and future aspects of improving the feasibility of bio-processing for microalgae bio-refinery.
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Affiliation(s)
- Apurav Krishna Koyande
- Department of Chemical Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Selangor Darul Ehsan, Malaysia
| | - Pau-Loke Show
- Department of Chemical Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Selangor Darul Ehsan, Malaysia
| | - Ruixin Guo
- School of Science, China Pharmaceutical University, Nanjing, China
| | - Bencan Tang
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, The University of Nottingham Ningbo China, Ningbo, China
| | - Chiaki Ogino
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan
| | - Jo-Shu Chang
- Department of Chemical and Materials Engineering, College of Engineering, Tunghai University, Taichung, Taiwan
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan
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What Is in Store for EPS Microalgae in the Next Decade? Molecules 2019; 24:molecules24234296. [PMID: 31775355 PMCID: PMC6930497 DOI: 10.3390/molecules24234296] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/12/2019] [Accepted: 11/15/2019] [Indexed: 11/17/2022] Open
Abstract
Microalgae and their metabolites have been an El Dorado since the turn of the 21st century. Many scientific works and industrial exploitations have thus been set up. These developments have often highlighted the need to intensify the processes for biomass production in photo-autotrophy and exploit all the microalgae value including ExoPolySaccharides (EPS). Indeed, the bottlenecks limiting the development of low value products from microalgae are not only linked to biology but also to biological engineering problems including harvesting, recycling of culture media, photoproduction, and biorefinery. Even respecting the so-called "Biorefinery Concept", few applications had a chance to emerge and survive on the market. Thus, exploiting EPS from microalgae for industrial applications in some low-value markets such as food is probably not a mature proposition considering the competitiveness of polysaccharides from terrestrial plants, macroalgae, and bacteria. However, it does not imply drawing a line on their uses but rather "thinking them" differently. This review provides insights into microalgae, EPS, and their exploitation. Perspectives on issues affecting the future of EPS microalgae are also addressed with a critical point of view.
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68
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High shear-assisted solvent extraction of lipid from wet biomass of Aurantiochytrium sp. KRS101. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.06.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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69
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Chou HH, Su HY, Song XD, Chow TJ, Chen CY, Chang JS, Lee TM. Isolation and characterization of Chlorella sp. mutants with enhanced thermo- and CO 2 tolerances for CO 2 sequestration and utilization of flue gases. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:251. [PMID: 31641373 PMCID: PMC6800494 DOI: 10.1186/s13068-019-1590-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 10/11/2019] [Indexed: 06/07/2023]
Abstract
BACKGROUND The increasing emission of flue gas from industrial plants contributes to environmental pollution, global warming, and climate change. Microalgae have been considered excellent biological materials for flue gas removal, particularly CO2 mitigation. However, tolerance to high temperatures is also critical for outdoor microalgal mass cultivation. Therefore, flue gas- and thermo-tolerant mutants of Chlorella vulgaris ESP-31 were generated and characterized for their ability to grow under various conditions. RESULTS In this study, we obtained two CO2- and thermo-tolerant mutants of Chlorella vulgaris ESP-31, namely, 283 and 359, with enhanced CO2 tolerance and thermo-tolerance by using N-methyl-N-nitro-N-nitrosoguanidine (NTG) mutagenesis followed by screening at high temperature and under high CO2 conditions with the w-zipper pouch selection method. The two mutants exhibited higher photosynthetic activity and biomass productivity than that of the ESP-31 wild type. More importantly, the mutants were able to grow at high temperature (40 °C) and a high concentration of simulated flue gas (25% CO2, 80-90 ppm SO2, 90-100 ppm NO) and showed higher carbohydrate and lipid contents than did the ESP-31 wild type. CONCLUSIONS The two thermo- and flue gas-tolerant mutants of Chlorella vulgaris ESP-31 were useful for CO2 mitigation from flue gas under heated conditions and for the production of carbohydrates and biodiesel directly using CO2 from flue gas.
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Affiliation(s)
- Hsiang-Hui Chou
- Department of Biotechnology, Fooyin University, Kaohsiung, 83102 Taiwan
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, 80424 Taiwan
| | - Hsiang-Yen Su
- China-Latin America Joint Laboratory for Clean Energy and Climate Change, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan, 523808 China
| | - Xiang-Di Song
- Department of Biotechnology, Fooyin University, Kaohsiung, 83102 Taiwan
| | - Te-Jin Chow
- Department of Biotechnology, Fooyin University, Kaohsiung, 83102 Taiwan
| | - Chun-Yen Chen
- University Center of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70146 Taiwan
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, 70146 Taiwan
- Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, 70146 Taiwan
| | - Tse-Min Lee
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 80424 Taiwan
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Microalgae at niches of bioelectrochemical systems: A new platform for sustainable energy production coupled industrial effluent treatment. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100290] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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71
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Abstract
Oleaginous algae are nowadays of significance for industrial biotechnology applications and for the welfare of society. Tremendous efforts have been put into the development of economically feasible and effective downstream processing techniques in algae research. Currently, Liquid Biphasic Systems (LBSs) are receiving much attention from academia and industry for their potential as green and effective downstream processing methods. This article serves to review the applications of LBSs (LBS and Liquid Biphasic Flotation System (LBFS)) in the separation, recovery and purification of algae products, as well as their basic working principles. Moreover, cell disruptive technologies incorporated into LBSs in algae research are reported. This review provides insights into the downstream processing in algae industrial biotechnology which could be beneficial for algae biorefinement.
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72
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Production of Polyunsaturated Fatty Acids and Lipids from Autotrophic, Mixotrophic and Heterotrophic cultivation of Galdieria sp. strain USBA-GBX-832. Sci Rep 2019; 9:10791. [PMID: 31346188 PMCID: PMC6658668 DOI: 10.1038/s41598-019-46645-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 06/28/2019] [Indexed: 01/31/2023] Open
Abstract
A search for extremophile organisms producing bioactive compounds led us to isolate a microalga identified as Galdieria sp. USBA-GBX-832 from acidic thermal springs. We have cultured Galdieria sp. USBA-GBX-832 under autotrophic, mixotrophic and heterotrophic conditions and determined variations of its production of biomass, lipids and PUFAs. Greatest biomass and PUFA production occurred under mixotrophic and heterotrophic conditions, but the highest concentration of lipids occurred under autotrophic conditions. Effects of variations of carbon sources and temperature on biomass and lipid production were evaluated and factorial experiments were used to analyze the effects of substrate concentration, temperature, pH, and organic and inorganic nitrogen on biomass production, lipids and PUFAs. Production of biomass and lipids was significantly dependent on temperature and substrate concentration. Greatest accumulation of PUFAs occurred at the lowest temperature tested. PUFA profiles showed trace concentrations of arachidonic acid (C20:4) and eicosapentaenoic acid (C20:5). This is the first time synthesis of these acids has been reported in Galdieria. These findings demonstrate that under heterotrophic conditions this microalga’s lipid profile is significantly different from those observed in other species of this genus which indicates that the culture conditions evaluated are key determinants of these organisms’ responses to stress conditions and accumulation of these metabolites.
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73
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Bench-Scale Cultivation of Microalgae Scenedesmus almeriensis for CO2 Capture and Lutein Production. ENERGIES 2019. [DOI: 10.3390/en12142806] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, Scenedesmus almeriensis as green microalga was cultivated on bench-scale for carbon dioxide (CO2) capture and lutein production. The autotrophic cultivation of S. almeriensis was carried out by using a vertical bubble column photo-bioreactor (VBC-PBR) with a continuous flow of a gaseous mixture of oxygen (O2), nitrogen (N2), and CO2, the latter in content of 0.0–3.0 %v/v. The liquid phase was batch. S. almeriensis growth was optimized. In addition, lutein extraction was carried out by using accelerated solvent extraction with ethanol as Generally Recognized as Safe (GRAS) solvent at 67 °C and 10 MPa. Upon optimization of CO2 concentration, the maximum biomass productivity, equal to 129.24 mg·L−1·d−1, was achieved during the cultivation by using a content of CO2 equal to 3.0 %v/v and it allowed to obtain a lutein content of 8.54 mg·g−1, which was 5.6-fold higher in comparison to the analogous process carried out without CO2 addition. The ion chemical analysis in the growth medium showed that by gradually increasing CO2 content, the nutrient consumption during the growth phase also increased. This study may be of potential interest for lutein extraction at industrial scale, since it is focused on pigment production from a natural source with a concomitantly CO2 capture.
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74
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Liu Q, Yao C, Sun Y, Chen W, Tan H, Cao X, Xue S, Yin H. Production and structural characterization of a new type of polysaccharide from nitrogen-limited Arthrospira platensis cultivated in outdoor industrial-scale open raceway ponds. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:131. [PMID: 31143244 PMCID: PMC6533678 DOI: 10.1186/s13068-019-1470-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/15/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Carbohydrates are major biomass source in fuel-targeted biorefinery. Arthrospira platensis is the largest commercialized microalgae with good environmental tolerance and high biomass production. However, the traditional target of A. platensis cultivation is the protein, which is the downstream product of carbohydrates. Aiming to provide the alternative non-food carbohydrates source, the feasible manipulation technology on the cultivation is needed, as well as new separation methodology to achieve maximum utilization of overall biomass. RESULTS The present study aimed to demonstrate the feasibility of industrially producing carbohydrate-enriched A. platensis and characterize the structure of the polysaccharide involved. Cultivated in industrial-scale outdoor open raceway ponds under nitrogen limitation, A. platensis accumulated maximally 64.3%DW of carbohydrate. The maximum biomass and carbohydrate productivity reached 27.5 g m-2 day-1 and 26.2 g m-2 day-1, respectively. The efficient extraction and purification of the polysaccharides include a high-pressure homogenization-assisted hot water extraction followed by flocculation with a non-toxic flocculant ZTC1 + 1, with the polysaccharide purity and total recovery reaching 81% and 75%, respectively. The purified polysaccharide was mainly composed of (1→3)(1→4)- or (1→3)(1→2)-α-glucan with a molecular weight of 300-700 kDa, which differed from the commonly acknowledged glycogen. CONCLUSIONS By the way of controlled nitrogen limitation, the high carbohydrate production of A. platensis in the industrial scale was achieved. The α-glucan from A. platensis could be a potential glucose source for industrial applications. A non-toxic separation method of carbohydrate was applied to maintain the possibility of utilization of residue in high-value field.
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Affiliation(s)
- Qishun Liu
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Changhong Yao
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065 Sichuan China
| | - Yongxin Sun
- Dalian Biotechnology Research Institute, Liaoning Academy of Agricultural Sciences, Dalian, 116024 China
| | - Wei Chen
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Haidong Tan
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Xupeng Cao
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Song Xue
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Heng Yin
- Division of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
- Liaoning Provincial Key Laboratory of Carbohydrates; Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
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de Morais MG, de Morais EG, Duarte JH, Deamici KM, Mitchell BG, Costa JAV. Biological CO2 mitigation by microalgae: technological trends, future prospects and challenges. World J Microbiol Biotechnol 2019; 35:78. [DOI: 10.1007/s11274-019-2650-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 04/26/2019] [Indexed: 12/27/2022]
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77
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Development of a Green Downstream Process for the Valorization of Porphyridium cruentum Biomass. Molecules 2019; 24:molecules24081564. [PMID: 31009991 PMCID: PMC6515528 DOI: 10.3390/molecules24081564] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 01/06/2023] Open
Abstract
As the interest in biorefinery approaches is continuously increasing, new alternatives for the downstream valorization of biomasses are sought. Porphyridium cruentum microalga is a good natural source for a variety of interesting bioactive compounds, including carotenoids, phycoerythrin, and sulfated polysaccharides. In the present contribution, the use of compressed fluids-based techniques is explored towards the efficient and green extraction of bioactive compounds to valorize microalgal biomass. The extraction of carotenoids was first optimized using pressurized ethanol. The best extraction conditions involved the use of 125 °C for 20 min at 10.5 MPa. Subsequently, a sequential valorization process was devised based on the application of different steps directed towards the extraction of phycoerythrin, sulfated polysaccharides, and carotenoids, respectively. The applied pressurized conditions allowed the attainment of a good recovery of polar components without compromising the stability and extraction of carotenoids. Therefore, the proposed approach could be employed to obtain different bioactives from P. cruentum microalgal biomass employing green extraction processes.
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78
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Unravelling the Potency of Activated Carbon Powder Derived from Cultivated Marine Microalgae as a Promising Filler in Mixed Matrix Membranes. AGRIENGINEERING 2019. [DOI: 10.3390/agriengineering1020014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Activated carbon-filled mixed matrix membranes were commonly used to enhance the separation performance of liquid or gas separation processes. Activated carbon is traditionally derived from agricultural crops such as coconut shells or wood biomass. Marine microalgae however have a great potential to produce powdered activated carbon. In this study, marine microalgae Chlorella vulgaris have been evaluated for their carbon content, and the 16.09% carbon content has potential to be employed as a raw material in manufacturing activated carbon powder. Dry microalgae were carbonized at a temperature of 500 °C for 30 min, at a constant increment rate of temperature of 10 °C per minute to produce microalgae charcoal. Chemically-based activation treatments using H3PO4 and ZnCl2 with concentrations of 10%, 30%, and 50%, respectively, assisted by microwave irradiation, have been used to prepare activated carbon. The properties of activated carbon powder were analyzed including yields, ash content, volatile substances, pure activated carbon content, absorption of iodine solution, surface area, and imaging of activated carbon using SEM-EDX. The best treatment characteristics were obtained using H3PO4 at a concentration of 50% with characteristics of 19.47% yield, 11.19% ash content, 31.92% volatile content, 56.89% pure activated carbon, 325.17 mg g−1 iodine absorption, and 109.273 m2 g−1 surface area based on the Brunauer–Emmett–Teller (BET) method, as well as a 5.5-nm average pore diameter. The SEM-EDX imaging results showed the formation of micropores on the surface of activated carbon, with carbon content reaching 72.31%; however, impurities could decrease the surface area and reduce the absorption performance of microalgae activated carbon.
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79
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Braga VDS, Moreira JB, Costa JAV, Morais MGD. Potential of Chlorella fusca LEB 111 cultivated with thermoelectric fly ashes, carbon dioxide and reduced supply of nitrogen to produce macromolecules. BIORESOURCE TECHNOLOGY 2019; 277:55-61. [PMID: 30658336 DOI: 10.1016/j.biortech.2019.01.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
Fly ashes present several minerals that along with carbon dioxide (CO2) represent a promising nutrient source and an alternative to reduce environmental problems. Thus, the objective of this study was to investigate if CO2, thermoelectric fly ashes and reduction in nitrogen supply alters the production of macromolecules in Chlorella fusca LEB 111. For this purpose, 1.5 or 0.75 g L-1 of NaNO3, injection of 10% (v v-1) of CO2 as well as 0, 40 and 120 ppm of fly ashes were studied. The protein content was not impaired in cultivations with 0.75 g L-1 of NaNO3 since nitrogen was not fully consumed. Nevertheless, this cultivation strategy increased carbohydrate content by up to 25%, which could be fermented to produce bioethanol. Therefore, Chlorella fusca presented not only potential for CO2 biofixation and assimilation of nutrients from fly ashes but also for enhancement of carbohydrates accumulation when the nitrogen supply was reduced.
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Affiliation(s)
- Vagner da Silva Braga
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Juliana Botelho Moreira
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
| | - Michele Greque de Morais
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
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80
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81
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Comparative assessment on the extraction of carotenoids from microalgal sources: Astaxanthin from H. pluvialis and β-carotene from D. salina. Food Chem 2019; 277:128-134. [DOI: 10.1016/j.foodchem.2018.10.066] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 10/10/2018] [Accepted: 10/12/2018] [Indexed: 11/20/2022]
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82
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De Bhowmick G, Sarmah AK, Sen R. Zero-waste algal biorefinery for bioenergy and biochar: A green leap towards achieving energy and environmental sustainability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:2467-2482. [PMID: 30293002 DOI: 10.1016/j.scitotenv.2018.10.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 10/01/2018] [Accepted: 10/01/2018] [Indexed: 06/08/2023]
Abstract
In spite of tremendous efforts and huge investments on resources, biodiesel from oleaginous microalgae has not yet become a commercially viable and sustainable alternative to petro-diesel. This is mainly because of the technological and economic challenges hovering around large scale cultivation and downstream processing of algae, water and land usage, stabilized production technology, market forces and government policies on alternative energy and carbon credits. This review attempts to capture and analyse the global trends and developments in the areas of biofuel and bio-product of microalgae and proposes possible strategies that can be adopted to produce biofuel, biochar and bio-products utilizing wastewater in a bio-refinery model. The strategies include "Zero waste discharge" concept with process integration, wherein microalgae is grown strategically using different wastewater combined with flue gas in cultivation system for simultaneous production of 'high-value-low-volume' product and 'low-value-high-volume' product with sharing of the remnant biomass to produce biochar. In addition, the CO2 present in the atmosphere is captured and sequestered long term in the form of biochar would help to attain carbon negativity, while remediating wastewater and balancing energy requirements. Therefore, "Zero waste discharge" concept holds the potential to make the process a sustainable one, while gaining on the carbon credits.
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Affiliation(s)
- Goldy De Bhowmick
- Department of Civil and Environmental Engineering, The Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Ajit K Sarmah
- Department of Civil and Environmental Engineering, The Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
| | - Ramkrishna Sen
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal 721302, India
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83
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Behera B, Acharya A, Gargey IA, Aly N, P B. Bioprocess engineering principles of microalgal cultivation for sustainable biofuel production. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2018.08.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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84
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Stoykova P, Stoyneva-Gärtner M, Uzunov B, Gärtner G, Atanassov I, Draganova P, Borisova C. Morphological characterization and phylogenetic analysis of aeroterrestrial Vischeria/Eustigmatos strains with industrial potential. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2018.1561212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Petya Stoykova
- Plant Genetics Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria
| | - Maya Stoyneva-Gärtner
- Department of Botany, Faculty of Biology, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Blagoy Uzunov
- Department of Botany, Faculty of Biology, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Georg Gärtner
- Institut für Botanik, Fakultät für Biologie, Üniversitat Innsbruck, Austria
| | - Ivan Atanassov
- Plant Genetics Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria
| | - Petya Draganova
- Department of Botany, Faculty of Biology, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
| | - Cvetanka Borisova
- Department of Botany, Faculty of Biology, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria
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85
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Leong HY, Su CA, Lee BS, Lan JCW, Law CL, Chang JS, Show PL. Development of Aurantiochytrium limacinum SR21 cultivation using salt-rich waste feedstock for docosahexaenoic acid production and application of natural colourant in food product. BIORESOURCE TECHNOLOGY 2019; 271:30-36. [PMID: 30261334 DOI: 10.1016/j.biortech.2018.09.093] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 09/15/2018] [Accepted: 09/17/2018] [Indexed: 05/11/2023]
Abstract
Microalgae biorefinery is presently receiving a lot of attention as driven by its production of high value-added products. In this study, an oleaginous microalga Aurantiochytrium limacinum SR21 was cultured for docosahexaenoic acid (DHA) production using 20% (w/v) of K2HPO4-waste feedstock to replace 0.005% (w/v) of KH2PO4 in the flask culture. DHA is an essential nutrient for human's brain functionalities. Collectively, the K2HPO4-waste feedstock with working concentration of 0.005% (w/v) in the cultivation prompted a higher lipid content (8.29%) and DHA production (128.81 mg.L-1). Moreover, natural plant pigment products containing stabilised betacyanins were utilised as natural red colourants for hard candy production. This study develops microalgal cultivation using salt-rich waste feedstock for a higher lipid and DHA content as well as application of natural colouring agents in food products.
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Affiliation(s)
- Hui Yi Leong
- Bioseparation Research Group, Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia; Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan
| | - Chien-An Su
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan
| | - Bo-Sheng Lee
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan
| | - John Chi-Wei Lan
- Biorefinery and Bioprocess Engineering Laboratory, Department of Chemical Engineering and Materials Science, Yuan Ze University, No. 135, Yuan-Tung Road, Chungli, Taoyuan 320, Taiwan
| | - Chung Lim Law
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Circular Economy, National Cheng Kung University, Tainan 701, Taiwan
| | - Pau Loke Show
- Bioseparation Research Group, Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
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Ramesh Kumar B, Deviram G, Mathimani T, Duc PA, Pugazhendhi A. Microalgae as rich source of polyunsaturated fatty acids. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.01.017] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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87
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Abstract
Microalgae have been used commercially since the 1950s and 1960s, particularly in the Far East for human health foods and in the United States for wastewater treatment. Initial attempts to produce bulk chemicals such as biofuels from microalgae were not successful, despite commercially favorable conditions during the 1970s oil crisis. However, research initiatives at this time, many using extremophilic microalgae and cyanobacteria (e.g., Dunaliella and Spirulina), did solve many problems and clearly identified biomass productivity and harvesting as the two main constraints stopping microalgae producing bulk chemicals, such as biofuels, on a large scale. In response to the growing unease around global warming, induced by anthropogenic CO2 emissions, microalgae were again suggested as a carbon neutral process to produce biofuels. This recent phase of microalgae biofuels research can be thought to have started around 2007, when a very highly cited review by Chisti was published. Since 2007, a large body of scientific publications have appeared on all aspects of microalgae biotechnology, but with a clear emphasis on neutral lipid (triacylglycerol) synthesis and the use of neutral lipids as precursors for biodiesel production. In this review, the key research on microalgal biotechnology that took place prior to 2007 will be summarized and then the research trends post 2007 will be examined emphasizing the research into producing biodiesel from microalgae.
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Affiliation(s)
- D James Gilmour
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, United Kingdom.
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88
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Mathimani T, Pugazhendhi A. Utilization of algae for biofuel, bio-products and bio-remediation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2018.12.007] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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89
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Takeuchi T, Benning C. Nitrogen-dependent coordination of cell cycle, quiescence and TAG accumulation in Chlamydomonas. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:292. [PMID: 31890020 PMCID: PMC6927116 DOI: 10.1186/s13068-019-1635-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 12/12/2019] [Indexed: 05/07/2023]
Abstract
Microalgae hold great promises as sustainable cellular factories for the production of alternative fuels, feeds, and biopharmaceuticals for human health. While the biorefinery approach for fuels along with the coproduction of high-value compounds with industrial, therapeutic, or nutraceutical applications have the potential to make algal biofuels more economically viable, a number of challenges continue to hamper algal production systems at all levels. One such hurdle includes the metabolic trade-off often observed between the increased yields of desired products, such as triacylglycerols (TAG), and the growth of an organism. Initial genetic engineering strategies to improve lipid productivity in microalgae, which focused on overproducing the enzymes involved in fatty acid and TAG biosynthesis or inactivating competing carbon (C) metabolism, have seen some successes albeit at the cost of often greatly reduced biomass. Emergent approaches that aim at modifying the dynamics of entire metabolic pathways by engineering of pertinent transcription factors or signaling networks appear to have successfully achieved a balance between growth and neutral lipid accumulation. However, the biological knowledge of key signaling networks and molecular components linking these two processes is still incomplete in photosynthetic eukaryotes, making it difficult to optimize metabolic engineering strategies for microalgae. Here, we focus on nitrogen (N) starvation of the model green microalga, Chlamydomonas reinhardtii, to present the current understanding of the nutrient-dependent switch between proliferation and quiescence, and the drastic reprogramming of metabolism that results in the storage of C compounds following N starvation. We discuss the potential components mediating the transcriptional repression of cell cycle genes and the establishment of quiescence in Chlamydomonas, and highlight the importance of signaling pathways such as those governed by the target of rapamycin (TOR) and sucrose nonfermenting-related (SnRK) kinases in the coordination of metabolic status with cellular growth. A better understanding of how the cell division cycle is regulated in response to nutrient scarcity and of the signaling pathways linking cellular growth to energy and lipid homeostasis, is essential to improve the prospects of biofuels and biomass production in microalgae.
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Affiliation(s)
- Tomomi Takeuchi
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824 USA
- Department of Energy-Plant Research Laboratory, Michigan State University, East Lansing, MI 48824 USA
| | - Christoph Benning
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824 USA
- Department of Energy-Plant Research Laboratory, Michigan State University, East Lansing, MI 48824 USA
- Department of Plant Biology, Michigan State University, East Lansing, MI 48824 USA
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90
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Sabri LS, Sultan AJ, Al-Dahhan MH. Mapping of microalgae culturing via radioactive particle tracking. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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91
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Seon G, Joo HW, Kim YJ, Park J, Chang YK. Hydrolysis of Lipid-Extracted Chlorella vulgaris by Simultaneous Use of Solid and Liquid Acids. Biotechnol Prog 2018; 35:e2729. [PMID: 30299000 DOI: 10.1002/btpr.2729] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 08/16/2018] [Accepted: 09/28/2018] [Indexed: 11/05/2022]
Abstract
Microalgal biomass was hydrolyzed using a solid acid catalyst with the aid of liquid acid. The use of solid acid as the main catalyst instead of liquid acid was to omit subsequent neutralization and/or desalination steps, which are commonly required in using the resulting hydrolysates for microbial fermentation. The hydrolysis of 10 g/L of lipid-extracted Chlorella vulgaris containing 12.2% carbohydrates using 7.6 g/L Amberlyst 36 and 0.0075 N nitric acid at 150°C resulted in 1.08 g/L of mono-sugars with a yield of 88.5%. For hydrolysis of higher concentrations of the biomass over 10 g/L, the amount of Amberlyst 36 needed to be increased in proportion to the biomass concentration to maintain similar levels of hydrolysis performance. Increasing the solid acid concentration protected the surface of the solid acid from being severely covered by cell debris during the reaction. A hydrolysate of lipid-extracted C. vulgaris 50 g/L was used, with no post-treatment of desalination, for the cultivation of Klebsiella oxytoca producing 2,3-butanediol. Cell growth in the hydrolysate was found to be almost the same as in the conventional medium with the same monosaccharide composition, confirming its fermentation compatibility. It was noticeable that the yield of 2,3-butanediol with the hydrolysate was observed to be 2.6 times higher than that with the conventional medium. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2729, 2019.
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Affiliation(s)
- Gyeongho Seon
- Dept. of Chemical & Biomolecular Engineering, Daejeon, 34141, Republic of Korea
| | - Hyun Woo Joo
- Dept. of Chemical & Biomolecular Engineering, Daejeon, 34141, Republic of Korea
| | - Yong Jae Kim
- Dept. of Chemical & Biomolecular Engineering, Daejeon, 34141, Republic of Korea
| | - Juyi Park
- Advanced Biomass R&D Center, Daejeon, 34141, Republic of Korea
| | - Yong Keun Chang
- Dept. of Chemical & Biomolecular Engineering, Daejeon, 34141, Republic of Korea.,Advanced Biomass R&D Center, Daejeon, 34141, Republic of Korea
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92
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Sun P, Wong CC, Li Y, He Y, Mao X, Wu T, Ren Y, Chen F. A novel strategy for isolation and purification of fucoxanthinol and fucoxanthin from the diatom Nitzschia laevis. Food Chem 2018; 277:566-572. [PMID: 30502186 DOI: 10.1016/j.foodchem.2018.10.133] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 10/22/2018] [Accepted: 10/28/2018] [Indexed: 12/12/2022]
Abstract
In this study, the microalga Nitzschia laevis (N. laevis) can accumulate a marine carotenoid fucoxanthinol. In particular, fucoxanthinol was firstly isolated from microalgae, accompanied by its derivative fucoxanthin. The identification and quantification of fucoxanthinol and fucoxanthin were determined by ultra-performance liquid chromatography coupled to photodiode array detector-quadrupole/travelling-wave ion mobility mass spectrometry/time-of-flight mass spectrometry (UPLC-PDA-TWIMS-QTOF-MS). Furthermore, a cost-effective approach mediated with solid-phase extraction (SPE) and thin-layer chromatography (TLC) technique was used to isolate and purify fucoxanthinol and fucoxanthin from the extracts of N. laevis. This two-step method can obtain 98% fucoxanthinol and 95% fucoxanthin, with the recovery efficiencies of around 85% for fucoxanthinol and 70% for fucoxanthin, respectively. Moreover, 1H and 13C nuclear magnetic resonance (NMR) techniques were adopted to record the purified compounds for supporting the above results. In all, the developed method has a promising potential to purify fucoxanthinol and fucoxanthin of microalgae for food and pharmaceutical applications.
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Affiliation(s)
- Peipei Sun
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Chi-Chun Wong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Yuelian Li
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Yongjin He
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Xuemei Mao
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Tao Wu
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Yuanyuan Ren
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Feng Chen
- BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China; Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China.
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93
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Chew KW, Chia SR, Show PL, Ling TC, Arya SS, Chang JS. Food waste compost as an organic nutrient source for the cultivation of Chlorella vulgaris. BIORESOURCE TECHNOLOGY 2018; 267:356-362. [PMID: 30029182 DOI: 10.1016/j.biortech.2018.07.069] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/12/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
The present study investigates the prospective of substituting inorganic medium with organic food waste compost medium as a nutrient supplement for the cultivation of Chlorella vulgaris FSP-E. Various percentages of compost mixtures were replaced in the inorganic medium to compare the algal growth and biochemical composition. The use of 25% compost mixture combination was found to yield higher biomass concentration (11.1%) and better lipid (10.1%) and protein (2.0%) content compared with microalgae cultivation in fully inorganic medium. These results exhibited the potential of combining the inorganic medium with organic food waste compost medium as an effective way to reduce the cultivation cost of microalgae and to increase the biochemical content in the cultivated microalgae.
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Affiliation(s)
- Kit Wayne Chew
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Shir Reen Chia
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia; Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Tau Chuan Ling
- Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Shalini S Arya
- Food Engineering and Technology Department, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 107, Taiwan; Research Center for Energy Technology and Strategy Center, National Cheng Kung University, Tainan 107, Taiwan
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94
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Xu K, Zou X, Wen H, Xue Y, Zhao S, Li Y. Buoy-bead flotation harvesting of the microalgae Chlorella vulgaris using surface-layered polymeric microspheres: A novel approach. BIORESOURCE TECHNOLOGY 2018; 267:341-346. [PMID: 30029180 DOI: 10.1016/j.biortech.2018.07.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 06/08/2023]
Abstract
To improve microalgae harvesting efficiency and to reduce the addition of chemicals in the buoy-bead flotation process, a novel buoy-bead flotation approach has been developed for harvesting Chlorella vulgaris, using surface-layered polymeric microspheres (SLPMs). Next, the detachment of microalgae cell-SLPM aggregates and the reusability of SLPMs were investigated. The experimental results showed that a maximum harvesting efficiency of 98.43% was achieved at a SLPM dosage of 0.7 g/L and a pH of 9, and harvesting efficiency quickly decreased with increasing ionic strength. A detachment efficiency of 78.46% and a concentration factor of 19.56 were achieved at an ionic strength of 700 mM and a mixing speed of 3000 rpm without changing the pH. Reused SLPMs can still reach an efficiency of 72.13% after five cycles. The presented results show that this method can potentially be applied for large-scale microalgae harvesting.
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Affiliation(s)
- Kaiwei Xu
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Xiaotong Zou
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Hao Wen
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Yating Xue
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Shuangfeng Zhao
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Yanpeng Li
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China; Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, Xi'an 710054, PR China.
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95
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Han J, Thomsen L, Pan K, Thomsen C. Two-step process: Enhanced strategy for wastewater treatment using microalgae. BIORESOURCE TECHNOLOGY 2018; 268:608-615. [PMID: 30138873 DOI: 10.1016/j.biortech.2018.08.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/12/2018] [Accepted: 08/15/2018] [Indexed: 06/08/2023]
Abstract
Microalgae possess many advantages, but the lack of a suitable strategy to simultaneously facilitate their low cost cultivation and high value productions limits their commercial applications. In this study, two microalgae strains (RT_C and RT_F) isolated from a municipal wastewater treatment plant were used to establish a two-step wastewater treatment process. During step-1, RT_C was cultivated in composite wastewater due to its high tolerance of sludge centrate; followed by step-2, in which the supernatant generated from RT_C culture was used to cultivate RT_F. The NH4+-N, PO43--P, and COD in the wastewater were removed almost completely using this strategy. Moreover, the majority of the metal ions in the wastewater were absorbed by RT_C during step-1, and thus the powdered RT_F only contained low levels of toxic metals. Our results demonstrate that this two-step process is effective for removing pollutants and while generating a powder sufficiently clean for extracting valuable compounds.
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Affiliation(s)
- Jichang Han
- Jacbos University of Bremen, Bremen 28759, Germany.
| | | | - Kehou Pan
- Key Laboratory of Mariculture (Ocean University of China), Ministry of Education, Qingdao 266003, China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China
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96
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Cardias BB, Morais MGD, Costa JAV. CO 2 conversion by the integration of biological and chemical methods: Spirulina sp. LEB 18 cultivation with diethanolamine and potassium carbonate addition. BIORESOURCE TECHNOLOGY 2018; 267:77-83. [PMID: 30015001 DOI: 10.1016/j.biortech.2018.07.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 07/05/2018] [Accepted: 07/07/2018] [Indexed: 06/08/2023]
Abstract
The aim of this work was to evaluate if the addition of the chemical absorbents diethanolamine and potassium carbonate affects the CO2 biofixation, growth and biomass composition of Spirulina sp. LEB 18. The association of the diethanolamine (DEA) and potassium carbonate (K2CO3) absorbents increased the dissolved inorganic carbon concentration in the cultivation medium, allowing greater CO2 biofixation by the Spirulina. Higher biomass concentration (2.1 g L-1) and maximum productivity (174.2 mg L-1 d-1) were observed with the mixture of 1.64 mmol L-1 of DEA and 0.41 mmol L-1 of K2CO3. In this cultivation condition, Spirulina sp. LEB 18 showed high protein content (58.8 w w-1) and an increased carbohydrate concentration (23.7% w w-1). The addition of these absorbent concentrations may be applied in the cultivation of Spirulina sp. LEB 18 to increase CO2 biofixation and cell growth.
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Affiliation(s)
- Bruna Barcelos Cardias
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Michele Greque de Morais
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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97
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Santos FM, Pires JCM. Nutrient recovery from wastewaters by microalgae and its potential application as bio-char. BIORESOURCE TECHNOLOGY 2018; 267:725-731. [PMID: 30082133 DOI: 10.1016/j.biortech.2018.07.119] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 07/23/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
The intensive agricultural practices are increasing the demand for chemical fertilizers, being currently produced from a non-environmental friendly way. Besides the environmental impacts, the nutrient uptake efficiency by the crops is very low, representing huge losses into the fields. Therefore, it is crucial to study alternatives for the current chemical fertilizers, which simultaneous improve nutrient efficiency and minimize environmental impacts. A sustainable solution is to recover nutrients from wastewater streams with microalgal cultures and the biomass conversion into bio-char for soil amendment. Wastewaters are loaded with nitrogen and phosphorus and can be used as culture medium for microalgae. Thus, nutrients can be recycled, reducing the requirement of chemical fertilizers. This paper aims to review nutrient recovery from wastewater using microalgae and the biomass conversion into bio-char. This process promotes nutrient recycling and the bio-char (when added to soil) improves the nutrient uptake efficiency by crops.
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Affiliation(s)
- Francisca M Santos
- Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia (LEPABE), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - José C M Pires
- Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia (LEPABE), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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98
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Trichormus variabilis (Cyanobacteria) Biomass: From the Nutraceutical Products to Novel EPS-Cell/Protein Carrier Systems. Mar Drugs 2018; 16:md16090298. [PMID: 30150548 PMCID: PMC6164293 DOI: 10.3390/md16090298] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 08/20/2018] [Accepted: 08/24/2018] [Indexed: 12/27/2022] Open
Abstract
A native strain of the heterocytous cyanobacterium Trichormus variabilis VRUC 168 was mass cultivated in a low-cost photobioreactor for a combined production of Polyunsaturated Fatty Acids (PUFA) and Exopolymeric Substances (EPS) from the same cyanobacterial biomass. A sequential extraction protocol was optimized leading to high yields of Released EPS (REPS) and PUFA, useful for nutraceutical products and biomaterials. REPS were extracted and characterized by chemical staining, Reversed Phase-High-Performance Liquid Chromatography (RP-HPLC), Fourier Transform Infrared Spectroscopy (FT-IR) and other spectroscopic techniques. Due to their gelation property, REPS were used to produce a photo-polymerizable hybrid hydrogel (REPS-Hy) with addition of polyethylene glycol diacrylated (PEGDa). REPS-Hy was stable over time and resistant to dehydration and spontaneous hydrolysis. The rheological and functional properties of REPS-Hy were studied. The enzyme carrier ability of REPS-Hy was assessed using the detoxification enzyme thiosulfate:cyanide sulfur transferase (TST), suggesting the possibility to use REPS-Hy as an enzymatic hydrogel system. Finally, REPS-Hy was used as a scaffold for culturing human mesenchymal stem cells (hMSCs). The cell seeding onto the REPS-Hy and the cell embedding into 3D-REPS-Hy demonstrated a scaffolding property of REPS-Hy with non-cytotoxic effect, suggesting potential applications of cyanobacteria REPS for producing enzyme- and cell-carrier systems.
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99
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Scherer MD, Filho FJCM, Oliveira AC, Selesu NFH, Ugaya CML, Mariano AB, Vargas JVC. Environmental evaluation of flocculation efficiency in the separation of the microalgal biomass of Scenedesmus sp. cultivated in full-scale photobioreactors. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2018; 53:938-945. [PMID: 29764286 DOI: 10.1080/10934529.2018.1470961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this paper the environmental evaluation of the separation process of the microalgal biomass Scenedesmus sp. from full-scale photobioreactors was carried out at the Research and Development Nucleus for Sustainable Energy (NPDEAS), with different flocculants (iron sulfate - FeCl3, sodium hydroxide - NaOH, calcium hydroxide - Ca(OH)2 and aluminum sulphate Al2(SO4)3, by means of the life cycle assessment (LCA) methodology, using the SimaPro 7.3 software. Furthermore, the flocculation efficiency by means of optical density (OD) was also evaluated. The results indicated that FeCl3 and Al2(SO4)3 were highly effective for the recovery of microalgal biomass, greater than 95%. Though, when FeCl3 was used, there was an immediate change in color to the biomass after the orange colored salt was added, typical with the presence of iron, which may compromise the biomass use according to its purpose and Al2(SO4)3 is associated with the occurrence of Alzheimer's disease, restricting the application of biomass recovered through this process for nutritional purposes, for example. Therefore, it was observed that sodium hydroxide is an efficient flocculant, promoting recovery around 93.5% for the ideal concentration of 144 mg per liter. It had the best environmental profile among the compared flocculant agents, since it did not cause visible changes in the biomass or compromise its use and had less impact in relation to acidification, eutrophication, global warming and human toxicity, among others. Thus, the results indicate that it is important to consider both flocculation efficiency aspects and environmental impacts to identify the best flocculants on an industrial scale, to optimize the process, with lower amount of flocculant and obtain the maximum biomass recovery and decrease the impact on the extraction, production, treatment and reuse of these chemical compounds to the environment. However, more studies are needed in order to evaluate energy efficiency of the process coupled with other microalgal biomass recovery technologies. In addition, studies with natural flocculants, other polymers and changes in pH are also needed, as these are produced in a more sustainable way than synthetic organic polymers and have the potential to generate a biomass free of undesirable contaminants.
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Affiliation(s)
- Marisa D Scherer
- a Federal University of Paraná, Av. Coronel Francisco Heráclito dos Santos , Curitiba , Paraná , Brazil
| | | | - Amanda C Oliveira
- a Federal University of Paraná, Av. Coronel Francisco Heráclito dos Santos , Curitiba , Paraná , Brazil
| | - Nelson F H Selesu
- a Federal University of Paraná, Av. Coronel Francisco Heráclito dos Santos , Curitiba , Paraná , Brazil
| | - Cássia M L Ugaya
- c Federal Technological University of Paraná , Curitiba , Paraná , Brazil
| | - André B Mariano
- a Federal University of Paraná, Av. Coronel Francisco Heráclito dos Santos , Curitiba , Paraná , Brazil
| | - José V C Vargas
- a Federal University of Paraná, Av. Coronel Francisco Heráclito dos Santos , Curitiba , Paraná , Brazil
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100
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Wirth R, Lakatos G, Böjti T, Maróti G, Bagi Z, Rákhely G, Kovács KL. Anaerobic gaseous biofuel production using microalgal biomass – A review. Anaerobe 2018; 52:1-8. [DOI: 10.1016/j.anaerobe.2018.05.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 05/16/2018] [Accepted: 05/22/2018] [Indexed: 12/17/2022]
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