1
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Schaedig E, Cantrell M, Urban C, Zhao X, Greene D, Dancer J, Gross M, Sebesta J, Chou KJ, Grabowy J, Gross M, Kumar K, Yu J. Isolation of phosphorus-hyperaccumulating microalgae from revolving algal biofilm (RAB) wastewater treatment systems. Front Microbiol 2023; 14:1219318. [PMID: 37529323 PMCID: PMC10389661 DOI: 10.3389/fmicb.2023.1219318] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/23/2023] [Indexed: 08/03/2023] Open
Abstract
Excess phosphorus (P) in wastewater effluent poses a serious threat to aquatic ecosystems and can spur harmful algal blooms. Revolving algal biofilm (RAB) systems are an emerging technology to recover P from wastewater before discharge into aquatic ecosystems. In RAB systems, a community of microalgae take up and store wastewater P as polyphosphate as they grow in a partially submerged revolving biofilm, which may then be harvested and dried for use as fertilizer in lieu of mined phosphate rock. In this work, we isolated and characterized a total of 101 microalgae strains from active RAB systems across the US Midwest, including 82 green algae, 9 diatoms, and 10 cyanobacteria. Strains were identified by microscopy and 16S/18S ribosomal DNA sequencing, cryopreserved, and screened for elevated P content (as polyphosphate). Seven isolated strains possessed at least 50% more polyphosphate by cell dry weight than a microalgae consortium from a RAB system, with the top strain accumulating nearly threefold more polyphosphate. These top P-hyperaccumulating strains include the green alga Chlamydomonas pulvinata TCF-48 g and the diatoms Eolimna minima TCF-3d and Craticula molestiformis TCF-8d, possessing 11.4, 12.7, and 14.0% polyphosphate by cell dry weight, respectively. As a preliminary test of strain application for recovering P, Chlamydomonas pulvinata TCF-48 g was reinoculated into a bench-scale RAB system containing Bold basal medium. The strain successfully recolonized the system and recovered twofold more P from the medium than a microalgae consortium from a RAB system treating municipal wastewater. These isolated P-hyperaccumulating microalgae may have broad applications in resource recovery from various waste streams, including improving P removal from wastewater.
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Affiliation(s)
- Eric Schaedig
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Michael Cantrell
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Chris Urban
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Xuefei Zhao
- Gross-Wen Technologies, Slater, IA, United States
| | - Drew Greene
- Gross-Wen Technologies, Slater, IA, United States
| | - Jens Dancer
- Gross-Wen Technologies, Slater, IA, United States
| | | | - Jacob Sebesta
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Katherine J. Chou
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
| | - Jonathan Grabowy
- Metropolitan Water Reclamation District of Greater Chicago, Chicago, IL, United States
| | - Martin Gross
- Gross-Wen Technologies, Slater, IA, United States
| | - Kuldip Kumar
- Metropolitan Water Reclamation District of Greater Chicago, Chicago, IL, United States
| | - Jianping Yu
- National Renewable Energy Laboratory, Biosciences Center, Golden, CO, United States
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2
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DISCOVR strain pipeline screening – Part I: Maximum specific growth rate as a function of temperature and salinity for 38 candidate microalgae for biofuels production. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.102996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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LaPanse AJ, Burch TA, Tamburro JM, Traller JC, Pinowska A, Posewitz MC. Adaptive laboratory evolution for increased temperature tolerance of the diatom Nitzschia inconspicua. Microbiologyopen 2022; 12:e1343. [PMID: 36825881 PMCID: PMC9791160 DOI: 10.1002/mbo3.1343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/13/2022] [Indexed: 12/27/2022] Open
Abstract
Outdoor microalgal cultivation for the production of valuable biofuels and bioproducts typically requires high insolation and strains with high thermal (>37°C) tolerance. While some strains are naturally thermotolerant, other strains of interest require improved performance at elevated temperatures to enhance industrial viability. In this study, adaptive laboratory evolution (ALE) was performed for over 300 days using consecutive 0.5°C temperature increases in a constant temperature incubator to attain greater thermal tolerance in the industrially relevant diatom Nitzschia inconspicua str. Hildebrandi. The adapted strain was able to grow at a constant temperature of 37.5°C; whereas this constant temperature was lethal to the parental control, which had an upper-temperature boundary of 35.5°C before adaptive evolution. Several high-temperature clonal isolates were obtained from the evolved population following ALE, and increased temperature tolerance was observed in the clonal, parent, and non-clonal adapted cultures. This ALE method demonstrates the development of enhanced industrial algal strains without the production of genetically modified organisms (GMOs).
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Affiliation(s)
| | - Tyson A. Burch
- Department of ChemistryColorado School of MinesGoldenColoradoUSA
| | - Jacob M. Tamburro
- Department of Quantitative Biosciences and EngineeringColorado School of MinesGoldenColoradoUSA
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4
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Novel microalgae strains from selected lower Himalayan aquatic habitats as potential sources of green products. PLoS One 2022; 17:e0267788. [PMID: 35536837 PMCID: PMC9089879 DOI: 10.1371/journal.pone.0267788] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 04/16/2022] [Indexed: 12/03/2022] Open
Abstract
Microalgal biomass provides a renewable source of biofuels and other green products. However, in order to realize economically viable microalgal biorefinery, strategic identification and utilization of suitable microalgal feedstock is fundamental. Here, a multi-step suboptimal screening strategy was used to target promising microalgae strains from selected freshwaters of the study area. The resulting strains were found to be affiliated to seven closely-related genera of the family Scenedesmaceae, as revealed by both morphologic and molecular characterization. Following initial screening under upper psychrophilic to optimum mesophilic (irregular temperature of 14.1 to 35.9°C) cultivation conditions, superior strains were chosen for further studies. Further cultivation of the selected strains under moderate to extreme mesophilic cultivation conditions (irregular temperature of 25.7 to 42.2°C), yielded up to 74.12 mgL-1day-1, 19.96 mgL-1day-1, 48.56%, 3.34 μg/mL and 1.20 μg/mL, for biomass productivity, lipid productivity, carbohydrate content, pigments content and carotenoids content respectively. These performances were deemed promising compared with some previous, optimum conditions-based reports. Interestingly, the fatty acids profile and the high carotenoids content of the studied strains revealed possible tolerance to the stress caused by the changing suboptimal cultivation conditions. Overall, strains AY1, CM6, LY2 and KL10 were exceptional and may present sustainable, promising feedstock for utilization in large-scale generation of green products, including biodiesel, bioethanol, pigments and dietary supplements. The findings of this study, which exposed promising, eurythermal strains, would expand the current knowledge on the search for promising microalgae strains capable of performing under the largely uncontrolled large-scale cultivation settings.
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5
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Gao F, Teles Cabanelas Itd I, Ferrer-Ledo N, Wijffels RH, Barbosa MJ. Production and high throughput quantification of fucoxanthin and lipids in Tisochrysis lutea using single-cell fluorescence. BIORESOURCE TECHNOLOGY 2020; 318:124104. [PMID: 32942095 DOI: 10.1016/j.biortech.2020.124104] [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: 08/20/2020] [Revised: 08/31/2020] [Accepted: 09/03/2020] [Indexed: 05/12/2023]
Abstract
This work aimed to investigate the accumulation of fucoxanthin and lipids in Tisochrysis lutea during growth (N+) and nitrogen-starvation (N-) and to correlate these products with single-cell emissions using fluorescence-activated cell sorting (FACS). Fucoxanthin content decreased 52.94% from N+ to N- in batch cultivation; increased 40.53% as dilution rate changed from 0.16 to 0.55 d-1 in continuous cultivation. Total lipids (N-) were constant (~250 mg/g), but the abundance of neutral lipids increased from 4.87% to 40.63%. Nile red can stain both polar and neutral lipids. However, in vivo, this differentiation is limited due to an overlapping of signals between 600 and 660 nm, caused by neutral lipids concentrations above 3.48% (W/W). Chlorophyll autofluorescence (720 nm) was reported for the first time as a proxy for fucoxanthin (R2 = 0.90) and polar lipids (R2 = 0.98). FACS can be used in high throughput quantification of pigments and lipids and to select and sort cells with high-fucoxanthin/lipids.
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Affiliation(s)
- Fengzheng Gao
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands.
| | - Iago Teles Cabanelas Itd
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands
| | - Narcís Ferrer-Ledo
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands
| | - René H Wijffels
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands; Faculty Biosciences and Aquaculture, Nord University, N-8049 Bodø, Norway
| | - Maria J Barbosa
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands
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6
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Isolation of Microalgae from Mediterranean Seawater and Production of Lipids in the Cultivated Species. Foods 2020; 9:foods9111601. [PMID: 33158015 PMCID: PMC7692243 DOI: 10.3390/foods9111601] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 11/20/2022] Open
Abstract
Isolation and identification of novel microalgae strains with high lipid productivity is one of the most important research topics to have emerged recently. However, practical production processes will probably require the use of local strains adapted to commanding climatic conditions. The present manuscript describes the isolation of 96 microalgae strains from seawater located in Bay M’diq, Morocco. Four strains were identified using the 18S rDNA and morphological identification through microscopic examination. The biomass and lipid productivity were compared and showed good results for Nannochloris sp. (15.93 mg/L/day). The lipid content in the four species, namely Nannochloropsis gaditana, Nannochloris sp., Phaedactylum tricornutum and Tetraselmis suecica, was carried out by high performance liquid chromatography coupled to mass spectrometry (HPLC-MS ) highlighting the identification of up to 77 compounds.
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7
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Sugarcane Industry Waste Recovery: A Case Study Using Thermochemical Conversion Technologies to Increase Sustainability. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10186481] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The sugarcane industry has assumed an increasingly important role at a global level, with countries such as Brazil and India dominating the field. However, this causes environmental problems, since the industry produces large amounts of waste, such as sugarcane bagasse. This by-product, which is energetically partially recovered in sugar mills and in the pulp and paper industry, can make a significant contribution to the general use of biomass energy, if the usual disadvantages associated with products with low density and a high moisture content are overcome. From this perspective, thermochemical conversion technologies, especially torrefaction, are assumed to be capable of improving the fuel properties of this material, making it more appealing for potential export and use in far-off destinations. In this work, sugarcane samples were acquired, and the process of obtaining bagasse was simulated. Subsequently, the bagasse was dried and heat-treated at 200 and 300 °C to simulate the over-drying and torrefaction process. Afterward, product characterization was performed, including thermogravimetric analysis, elemental analysis, calorimetry, and energy densification. The results showed significant improvements in the energy content, from 18.17 to 33.36 MJ·kg−1 from dried bagasse to torrefied bagasse at 300 °C, showing that despite high mass loss, there is potential for a future value added chain for this waste form, since the increment in energy density could enhance its transportation and use in locations far off the production site.
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8
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Dahlin LR, Gerritsen AT, Henard CA, Van Wychen S, Linger JG, Kunde Y, Hovde BT, Starkenburg SR, Posewitz MC, Guarnieri MT. Development of a high-productivity, halophilic, thermotolerant microalga Picochlorum renovo. Commun Biol 2019; 2:388. [PMID: 31667362 PMCID: PMC6811619 DOI: 10.1038/s42003-019-0620-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 09/10/2019] [Indexed: 01/21/2023] Open
Abstract
Microalgae are promising biocatalysts for applications in sustainable fuel, food, and chemical production. Here, we describe culture collection screening, down-selection, and development of a high-productivity, halophilic, thermotolerant microalga, Picochlorum renovo. This microalga displays a rapid growth rate and high diel biomass productivity (34 g m-2 day-1), with a composition well-suited for downstream processing. P. renovo exhibits broad salinity tolerance (growth at 107.5 g L-1 salinity) and thermotolerance (growth up to 40 °C), beneficial traits for outdoor cultivation. We report complete genome sequencing and analysis, and genetic tool development suitable for expression of transgenes inserted into the nuclear or chloroplast genomes. We further evaluate mechanisms of halotolerance via comparative transcriptomics, identifying novel genes differentially regulated in response to high salinity cultivation. These findings will enable basic science inquiries into control mechanisms governing Picochlorum biology and lay the foundation for development of a microalga with industrially relevant traits as a model photobiology platform.
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Affiliation(s)
- Lukas R. Dahlin
- Department of Chemistry, Colorado School of Mines, Golden, CO 80401 USA
| | - Alida T. Gerritsen
- Computational Science Center, National Renewable Energy Laboratory, Golden, CO 80401 USA
| | - Calvin A. Henard
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401 USA
| | - Stefanie Van Wychen
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401 USA
| | - Jeffrey G. Linger
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401 USA
| | - Yuliya Kunde
- Los Alamos National Laboratory, Los Alamos, NM 87545 USA
| | - Blake T. Hovde
- Los Alamos National Laboratory, Los Alamos, NM 87545 USA
| | | | | | - Michael T. Guarnieri
- National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401 USA
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9
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Knoshaug EP, Dong T, Spiller R, Nagle N, Pienkos PT. Pretreatment and fermentation of salt-water grown algal biomass as a feedstock for biofuels and high-value biochemicals. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.10.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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10
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Dahlin LR, Van Wychen S, Gerken HG, McGowen J, Pienkos PT, Posewitz MC, Guarnieri MT. Down-Selection and Outdoor Evaluation of Novel, Halotolerant Algal Strains for Winter Cultivation. FRONTIERS IN PLANT SCIENCE 2018; 9:1513. [PMID: 30459782 PMCID: PMC6232915 DOI: 10.3389/fpls.2018.01513] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 09/26/2018] [Indexed: 06/09/2023]
Abstract
Algae offer promising feedstocks for the production of renewable fuel and chemical intermediates. However, poor outdoor winter cultivation capacity currently limits deployment potential. In this study, 300 distinct algal strains were screened in saline medium to determine their cultivation suitability during winter conditions in Mesa, Arizona. Three strains, from the genera Micractinium, Chlorella, and Scenedesmus, were chosen following laboratory evaluations and grown outdoors in 1000 L raceway ponds during the winter. Strains were down-selected based on doubling time, lipid and carbohydrate amount, final biomass accumulation capacity, cell size and phylogenetic diversity. Algal biomass productivity and compositional analysis for lipids and carbohydrates show successful outdoor deployment and cultivation under winter conditions for these strains. Outdoor harvest-yield biomass productivities ranged from 2.9 to 4.0 g/m2/day over an 18 days winter cultivation trial, with maximum productivities ranging from 4.0 to 6.5 g/m2/day, the highest productivities reported to date for algal winter strains grown in saline media in open raceway ponds. Peak fatty acid levels ranged from 9 to 26% percent of biomass, and peak carbohydrate levels ranged from 13 to 34% depending on the strain. Changes in the lipid and carbohydrate profile throughout outdoor growth are reported. This study demonstrates that algal strain screening under simulated outdoor environmental conditions in the laboratory enables identification of strains with robust biomass productivity and biofuel precursor composition. The strains isolated here represent promising winter deployment candidates for seasonal algal biomass production when using crop rotation strategies.
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Affiliation(s)
- Lukas R. Dahlin
- Department of Chemistry, Colorado School of Mines, Golden, CO, United States
| | - Stefanie Van Wychen
- National Renewable Energy Laboratory, National Bioenergy Center, Golden, CO, United States
| | - Henri G. Gerken
- Arizona Center for Algae Technology and Innovation, Arizona State University, Mesa, AZ, United States
| | - John McGowen
- Arizona Center for Algae Technology and Innovation, Arizona State University, Mesa, AZ, United States
| | - Philip T. Pienkos
- National Renewable Energy Laboratory, National Bioenergy Center, Golden, CO, United States
| | - Matthew C. Posewitz
- Department of Chemistry, Colorado School of Mines, Golden, CO, United States
| | - Michael T. Guarnieri
- National Renewable Energy Laboratory, National Bioenergy Center, Golden, CO, United States
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11
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Pereira H, Schulze PS, Schüler LM, Santos T, Barreira L, Varela J. Fluorescence activated cell-sorting principles and applications in microalgal biotechnology. ALGAL RES 2018. [DOI: 10.1016/j.algal.2017.12.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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12
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Dashkova V, Malashenkov D, Poulton N, Vorobjev I, Barteneva NS. Imaging flow cytometry for phytoplankton analysis. Methods 2017; 112:188-200. [DOI: 10.1016/j.ymeth.2016.05.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 05/13/2016] [Indexed: 10/21/2022] Open
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13
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Enhancement of Lipid Production of Chlorella Pyrenoidosa Cultivated in Municipal Wastewater by Magnetic Treatment. Appl Biochem Biotechnol 2016; 180:1043-1055. [DOI: 10.1007/s12010-016-2151-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 05/30/2016] [Indexed: 11/28/2022]
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14
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Characterization and classification of highly productive microalgae strains discovered for biofuel and bioproduct generation. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.01.007] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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15
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Han SF, Jin W, Tu R, Abomohra AEF, Wang ZH. Optimization of aeration for biodiesel production by Scenedesmus obliquus grown in municipal wastewater. Bioprocess Biosyst Eng 2016; 39:1073-9. [DOI: 10.1007/s00449-016-1585-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
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16
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Bajhaiya AK, Dean AP, Driver T, Trivedi DK, Rattray NJW, Allwood JW, Goodacre R, Pittman JK. High-throughput metabolic screening of microalgae genetic variation in response to nutrient limitation. Metabolomics 2016; 12:9. [PMID: 26594136 PMCID: PMC4644200 DOI: 10.1007/s11306-015-0878-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 07/29/2015] [Indexed: 11/26/2022]
Abstract
Microalgae produce metabolites that could be useful for applications in food, biofuel or fine chemical production. The identification and development of suitable strains require analytical methods that are accurate and allow rapid screening of strains or cultivation conditions. We demonstrate the use of Fourier transform infrared (FT-IR) spectroscopy to screen mutant strains of Chlamydomonas reinhardtii. These mutants have knockdowns for one or more nutrient starvation response genes, namely PSR1, SNRK2.1 and SNRK2.2. Limitation of nutrients including nitrogen and phosphorus can induce metabolic changes in microalgae, including the accumulation of glycerolipids and starch. By performing multivariate statistical analysis of FT-IR spectra, metabolic variation between different nutrient limitation and non-stressed conditions could be differentiated. A number of mutant strains with similar genetic backgrounds could be distinguished from wild type when grown under specific nutrient limited and replete conditions, demonstrating the sensitivity of FT-IR spectroscopy to detect specific genetic traits. Changes in lipid and carbohydrate between strains and specific nutrient stress treatments were validated by other analytical methods, including liquid chromatography-mass spectrometry for lipidomics. These results demonstrate that the PSR1 gene is an important determinant of lipid and starch accumulation in response to phosphorus starvation but not nitrogen starvation. However, the SNRK2.1 and SNRK2.2 genes are not as important for determining the metabolic response to either nutrient stress. We conclude that FT-IR spectroscopy and chemometric approaches provide a robust method for microalgae screening.
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Affiliation(s)
- Amit K. Bajhaiya
- />Faculty of Life Sciences, The University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT UK
| | - Andrew P. Dean
- />Faculty of Life Sciences, The University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT UK
- />Department of Geography, University of Sheffield, Sheffield, S10 2TN UK
| | - Thomas Driver
- />Faculty of Life Sciences, The University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT UK
| | - Drupad K. Trivedi
- />School of Chemistry, Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - Nicholas J. W. Rattray
- />School of Chemistry, Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - J. William Allwood
- />School of Chemistry, Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
- />Environmental & Biochemical Sciences Group, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA Scotland, UK
| | - Royston Goodacre
- />School of Chemistry, Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN UK
| | - Jon K. Pittman
- />Faculty of Life Sciences, The University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT UK
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17
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Low M, Glasser D, Ming D, Hildebrandt D, Matambo T. Batch Partial Emptying and Filling To Improve the Production Rate of Algae. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b03093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michelle Low
- School
of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Gauteng 2000, South Africa
| | - David Glasser
- School
of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Gauteng 2000, South Africa
- Material
and Process Synthesis (MaPS Engineering), University of South Africa Florida Campus, Roodepoort, Gauteng 1709, South Africa
| | - David Ming
- School
of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Gauteng 2000, South Africa
| | - Diane Hildebrandt
- Material
and Process Synthesis (MaPS Engineering), University of South Africa Florida Campus, Roodepoort, Gauteng 1709, South Africa
| | - Tonderayi Matambo
- Material
and Process Synthesis (MaPS Engineering), University of South Africa Florida Campus, Roodepoort, Gauteng 1709, South Africa
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18
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The dark side of algae cultivation: Characterizing night biomass loss in three photosynthetic algae, Chlorella sorokiniana, Nannochloropsis salina and Picochlorum sp. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.10.012] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Emami K, Hack E, Nelson A, Brain CM, Lyne FM, Mesbahi E, Day JG, Caldwell GS. Proteomic-based biotyping reveals hidden diversity within a microalgae culture collection: An example using Dunaliella. Sci Rep 2015; 5:10036. [PMID: 25963242 PMCID: PMC4650328 DOI: 10.1038/srep10036] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 03/24/2015] [Indexed: 11/16/2022] Open
Abstract
Accurate and defendable taxonomic identification of microalgae strains is vital for culture collections, industry and academia; particularly when addressing issues of intellectual property. We demonstrate the remarkable effectiveness of Matrix Assisted Laser Desorption Ionisation Time of Flight Mass Spectrometry (MALDI-TOF-MS) biotyping to deliver rapid and accurate strain separation, even in situations where standard molecular tools prove ineffective. Highly distinctive MALDI spectra were obtained for thirty two biotechnologically interesting Dunaliella strains plus strains of Arthrospira, Chlorella, Isochrysis, Tetraselmis and a range of culturable co-occurring bacteria. Spectra were directly compared with genomic DNA sequences (internal transcribed spacer, ITS). Within individual Dunaliella isolates MALDI discriminated between strains with identical ITS sequences, thereby emphasising and enhancing knowledge of the diversity within microalgae culture collections. Further, MALDI spectra did not vary with culture age or growth stage during the course of the experiment; therefore MALDI presents stable and accurate strain-specific signature spectra. Bacterial contamination did not affect MALDI’s discriminating power. Biotyping by MALDI-TOF-MS will prove effective in situations wherein precise strain identification is vital, for example in cases involving intellectual property disputes and in monitoring and safeguarding biosecurity. MALDI should be accepted as a biotyping tool to complement and enhance standard molecular taxonomy for microalgae.
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Affiliation(s)
- Kaveh Emami
- School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Ethan Hack
- School of Biology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Andrew Nelson
- Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST
| | - Chelsea M Brain
- School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Fern M Lyne
- School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Ehsan Mesbahi
- Faculty of Science, Agriculture and Engineering (SAgE), Devonshire Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - John G Day
- Culture Collection of Algae and Protozoa, Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA, UK
| | - Gary S Caldwell
- School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
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Cabanelas ITD, Zwart MVD, Kleinegris DMM, Barbosa MJ, Wijffels RH. Rapid method to screen and sort lipid accumulating microalgae. BIORESOURCE TECHNOLOGY 2015; 184:47-52. [PMID: 25453436 DOI: 10.1016/j.biortech.2014.10.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 10/09/2014] [Accepted: 10/10/2014] [Indexed: 05/21/2023]
Abstract
The present work established an efficient staining method for fluorescence activated cell sorting (FACS) with Chlorococcum littorale maintaining cellular viability. The method was designed to detect high-lipid cells and to guarantee cellular viability. BODIPY505/515 (BP) was more suitable to FACS when compared to Nile red. The optimum concentrations were 0.4 μg ml(-1) of BP, 0.1% DMSO or 0.35% ethanol. Both ethanol and DMSO were equally efficient and assured cellular viability after the staining and sorting. Here a method is presented to rapidly screen and sort lipid rich cells of C. littorale with FACS, which can be used to produce new inoculum with increased cellular lipid content.
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Affiliation(s)
- Iago Teles Dominguez Cabanelas
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 8128, 6700 EV Wageningen, Netherlands; Wageningen University and Research Center, Food and Biobased Research, AlgaePARC, Bornsesteeg 10, Building 112, 6721NG Bennekom, Netherlands.
| | - Mathijs van der Zwart
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 8128, 6700 EV Wageningen, Netherlands
| | - Dorinde M M Kleinegris
- Wageningen University and Research Center, Food and Biobased Research, AlgaePARC, Bornsesteeg 10, Building 112, 6721NG Bennekom, Netherlands
| | - Maria J Barbosa
- Wageningen University and Research Center, Food and Biobased Research, AlgaePARC, Bornsesteeg 10, Building 112, 6721NG Bennekom, Netherlands
| | - René H Wijffels
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 8128, 6700 EV Wageningen, Netherlands
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Hallenbeck PC, Leite GB, Abdelaziz AE. Exploring the diversity of microalgal physiology for applications in wastewater treatment and biofuel production. ALGAL RES 2014. [DOI: 10.1016/j.algal.2014.09.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Algal biomass analysis by laser-based analytical techniques--a review. SENSORS 2014; 14:17725-52. [PMID: 25251409 PMCID: PMC4208246 DOI: 10.3390/s140917725] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 09/05/2014] [Accepted: 09/11/2014] [Indexed: 12/12/2022]
Abstract
Algal biomass that is represented mainly by commercially grown algal strains has recently found many potential applications in various fields of interest. Its utilization has been found advantageous in the fields of bioremediation, biofuel production and the food industry. This paper reviews recent developments in the analysis of algal biomass with the main focus on the Laser-Induced Breakdown Spectroscopy, Raman spectroscopy, and partly Laser-Ablation Inductively Coupled Plasma techniques. The advantages of the selected laser-based analytical techniques are revealed and their fields of use are discussed in detail.
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Abdelaziz AEM, Leite GB, Belhaj MA, Hallenbeck PC. Screening microalgae native to Quebec for wastewater treatment and biodiesel production. BIORESOURCE TECHNOLOGY 2014; 157:140-148. [PMID: 24549235 DOI: 10.1016/j.biortech.2014.01.114] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 01/24/2014] [Accepted: 01/27/2014] [Indexed: 06/03/2023]
Abstract
Biodiesel production from microalgae lipids is being considered as a potential source of renewable energy. However, practical production processes will probably require the use of local strains adapted to prevailing climatic conditions. This report describes the isolation of 100 microalgal strains from freshwater lakes and rivers located in the vicinity of Montreal, Quebec, Canada. Strains were identified and surveyed for their growth on secondary effluent from a municipal wastewater treatment plant (La Prairie, QC, Canada) using a simple and high throughput microalgal screening method employing 12 well plates. The biomass and lipid productivity of these strains on wastewater were compared to a synthetic medium under different temperatures (10±2°C and 22±2°C) and a number identified that showed good growth at 10°C, gave a high lipid content (ranging from 20% to 45% of dry weight) or a high capacity for nutrient removal.
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Affiliation(s)
- Ahmed E M Abdelaziz
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, PQ H3C 3J7, Canada
| | - Gustavo B Leite
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, PQ H3C 3J7, Canada
| | - Mohamed A Belhaj
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, PQ H3C 3J7, Canada
| | - Patrick C Hallenbeck
- Département de microbiologie et immunologie, Université de Montréal, CP 6128, Centre-ville, Montréal, PQ H3C 3J7, Canada.
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D'Adamo S, Jinkerson RE, Boyd ES, Brown SL, Baxter BK, Peters JW, Posewitz MC. Evolutionary and biotechnological implications of robust hydrogenase activity in halophilic strains of Tetraselmis. PLoS One 2014; 9:e85812. [PMID: 24465722 PMCID: PMC3897525 DOI: 10.1371/journal.pone.0085812] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 12/02/2013] [Indexed: 11/19/2022] Open
Abstract
Although significant advances in H2 photoproduction have recently been realized in fresh water algae (e.g. Chlamydomonas reinhardtii), relatively few studies have focused on H2 production and hydrogenase adaptations in marine or halophilic algae. Salt water organisms likely offer several advantages for biotechnological H2 production due to the global abundance of salt water, decreased H2 and O2 solubility in saline and hypersaline systems, and the ability of extracellular NaCl levels to influence metabolism. We screened unialgal isolates obtained from hypersaline ecosystems in the southwest United States and identified two distinct halophilic strains of the genus Tetraselmis (GSL1 and QNM1) that exhibit both robust fermentative and photo H2-production activities. The influence of salinity (3.5%, 5.5% and 7.0% w/v NaCl) on H2 production was examined during anoxic acclimation, with the greatest in vivo H2-production rates observed at 7.0% NaCl. These Tetraselmis strains maintain robust hydrogenase activity even after 24 h of anoxic acclimation and show increased hydrogenase activity relative to C. reinhardtii after extended anoxia. Transcriptional analysis of Tetraselmis GSL1 enabled sequencing of the cDNA encoding the FeFe-hydrogenase structural enzyme (HYDA) and its maturation proteins (HYDE, HYDEF and HYDG). In contrast to freshwater Chlorophyceae, the halophilic Tetraselmis GSL1 strain likely encodes a single HYDA and two copies of HYDE, one of which is fused to HYDF. Phylogenetic analyses of HYDA and concatenated HYDA, HYDE, HYDF and HYDG in Tetraselmis GSL1 fill existing knowledge gaps in the evolution of algal hydrogenases and indicate that the algal hydrogenases sequenced to date are derived from a common ancestor. This is consistent with recent hypotheses that suggest fermentative metabolism in the majority of eukaryotes is derived from a common base set of enzymes that emerged early in eukaryotic evolution with subsequent losses in some organisms.
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Affiliation(s)
- Sarah D'Adamo
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado, United States of America
| | - Robert E. Jinkerson
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado, United States of America
| | - Eric S. Boyd
- Department of Microbiology and the Thermal Biology Institute, Montana State University, Bozeman, Montana, United States of America
| | - Susan L. Brown
- Center for Marine Microbial Ecology and Diversity, University of Hawaii, Honolulu, Hawaii, United States of America
| | - Bonnie K. Baxter
- Department of Biology and the Great Salt Lake Institute, Westminster College, Salt Lake City, Utah, United States of America
| | - John W. Peters
- Department of Microbiology and the Thermal Biology Institute, Montana State University, Bozeman, Montana, United States of America
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana, United States of America
| | - Matthew C. Posewitz
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, Colorado, United States of America
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