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Peng J, Wen K, Liu W, Yue X, Wang A, Zhou A. EPS solubilization and waste activated sludge acidification enhanced by alkaline-assisted bi-frequency ultrasonic pretreatment revealed by 3D-EEM fluorescence. RSC Adv 2016. [DOI: 10.1039/c6ra19521k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effect of alkaline-assisted bi-frequency (28 + 40 kHz) ultrasonic pretreatment on extracellular polymeric substances (EPS) solubilization and waste activated sludge (WAS) acidification was investigated.
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Affiliation(s)
- Jing Peng
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology (SKLUWRE, HIT)
- Harbin
- China
| | - Kaili Wen
- College of Environmental Science and Engineering
- Taiyuan University of Technology
- Taiyuan
- China
| | - Wenzong Liu
- Research Center for Eco-Environmental Sciences
- Chinese Academy of Sciences
- Beijing
- China
| | - Xiuping Yue
- College of Environmental Science and Engineering
- Taiyuan University of Technology
- Taiyuan
- China
| | - Aijie Wang
- State Key Laboratory of Urban Water Resource and Environment
- Harbin Institute of Technology (SKLUWRE, HIT)
- Harbin
- China
- Research Center for Eco-Environmental Sciences
| | - Aijuan Zhou
- College of Environmental Science and Engineering
- Taiyuan University of Technology
- Taiyuan
- China
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52
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Farooq W, Mishra SK, Moon M, Suh WI, Shrivastav A, Kumar K, Kwon JH, Park MS, Yang JW. Energy efficient process for microalgae cell disruption for oil recovery using triiodide resin. ALGAL RES 2016. [DOI: 10.1016/j.algal.2015.11.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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53
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MIKŠ-KRAJNIK MARTA, YUK HYUNGYUN, KUMAR AMIT, YANG YISHAN, ZHENG QIANWANG, KIM MINJEONG, GHATE VINAYAK, YUAN WENQIAN, PANG XINYI. ENSURING FOOD SECURITY THROUGH ENHANCING MICROBIOLOGICAL FOOD SAFETY. ACTA ACUST UNITED AC 2015. [DOI: 10.1142/s0219607715500056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Food safety and food security are interrelated concepts with a profound impact on the quality of human life. Food security describes the overall availability of food at different levels from global to individual household. While, food safety focuses on handling, preparation and storage of foods in order to prevent foodborne illnesses. This review focuses on innovative thermal and non-thermal technologies in the area of food processing as the means to ensure food security through improving food safety with emphasis on the reduction and control of microbiological risks. The antimicrobial efficiency and mechanism of new technologies to extend the shelf life of food product were also discussed.
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Affiliation(s)
- MARTA MIKŠ-KRAJNIK
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Chair of Industrial and Food Microbiology, Faculty of Food Science, University of Warmia and Mazury in Olsztyn, Plac Cieszyński 1, 10-726 Olsztyn, Poland
| | - HYUN-GYUN YUK
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - AMIT KUMAR
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - YISHAN YANG
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - QIANWANG ZHENG
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - MIN-JEONG KIM
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - VINAYAK GHATE
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - WENQIAN YUAN
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - XINYI PANG
- Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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54
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Lai YS, Parameswaran P, Li A, Aguinaga A, Rittmann BE. Selective fermentation of carbohydrate and protein fractions ofScenedesmus, and biohydrogenation of its lipid fraction for enhanced recovery of saturated fatty acids. Biotechnol Bioeng 2015. [DOI: 10.1002/bit.25714] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- YenJung Sean Lai
- Swette Center for Environmental Biotechnology; The Biodesign Institute at Arizona State University; P.O. Box 875701 Tempe Arizona 85287-5701
| | - Prathap Parameswaran
- Swette Center for Environmental Biotechnology; The Biodesign Institute at Arizona State University; P.O. Box 875701 Tempe Arizona 85287-5701
| | - Ang Li
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering; Harbin Institute of Technology; Harbin People's Republic of China
| | - Alyssa Aguinaga
- Swette Center for Environmental Biotechnology; The Biodesign Institute at Arizona State University; P.O. Box 875701 Tempe Arizona 85287-5701
| | - Bruce E. Rittmann
- Swette Center for Environmental Biotechnology; The Biodesign Institute at Arizona State University; P.O. Box 875701 Tempe Arizona 85287-5701
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55
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Coustets M, Joubert-Durigneux V, Hérault J, Schoefs B, Blanckaert V, Garnier JP, Teissié J. Optimization of protein electroextraction from microalgae by a flow process. Bioelectrochemistry 2015; 103:74-81. [DOI: 10.1016/j.bioelechem.2014.08.022] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 07/22/2014] [Accepted: 08/12/2014] [Indexed: 11/28/2022]
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56
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Vinayak V, Manoylov KM, Gateau H, Blanckaert V, Hérault J, Pencréac'h G, Marchand J, Gordon R, Schoefs B. Diatom milking: a review and new approaches. Mar Drugs 2015; 13:2629-65. [PMID: 25939034 PMCID: PMC4446598 DOI: 10.3390/md13052629] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 04/15/2015] [Accepted: 04/17/2015] [Indexed: 11/16/2022] Open
Abstract
The rise of human populations and the growth of cities contribute to the depletion of natural resources, increase their cost, and create potential climatic changes. To overcome difficulties in supplying populations and reducing the resource cost, a search for alternative pharmaceutical, nanotechnology, and energy sources has begun. Among the alternative sources, microalgae are the most promising because they use carbon dioxide (CO2) to produce biomass and/or valuable compounds. Once produced, the biomass is ordinarily harvested and processed (downstream program). Drying, grinding, and extraction steps are destructive to the microalgal biomass that then needs to be renewed. The extraction and purification processes generate organic wastes and require substantial energy inputs. Altogether, it is urgent to develop alternative downstream processes. Among the possibilities, milking invokes the concept that the extraction should not kill the algal cells. Therefore, it does not require growing the algae anew. In this review, we discuss research on milking of diatoms. The main themes are (a) development of alternative methods to extract and harvest high added value compounds; (b) design of photobioreactors;
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Affiliation(s)
- Vandana Vinayak
- Department of Criminology & Forensic Science, School of Applied Sciences, Dr. H.S. Gour University (Central University), Sagar Madhya Pradesh, India.
| | - Kalina M Manoylov
- Department of Biological & Environmental Sciences, Georgia College and State University, Milledgeville, GA 31061, USA.
| | - Hélène Gateau
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, Faculté des Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France.
| | - Vincent Blanckaert
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, IUT de Laval, Rue des Drs Calmette et Guerin, 53020 Laval Cedex 9, France.
| | - Josiane Hérault
- ChimiMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, IUT de Laval, Rue des Drs Calmette et Guerin, 53020 Laval Cedex 9, France.
| | - Gaëlle Pencréac'h
- ChimiMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, IUT de Laval, Rue des Drs Calmette et Guerin, 53020 Laval Cedex 9, France.
| | - Justine Marchand
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, Faculté des Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France.
| | - Richard Gordon
- Gulf Specimen Aquarium & Marine Laboratory, Panacea, FL 32346, USA.
- Mott Center for Human Growth and Development, Department of Obstetrics & Gynecology, Wayne State University, 275 E. Hancock, Detroit, MI 48201, USA.
| | - Benoît Schoefs
- MicroMar, Mer Molécules Santé, IUML-FR 3473 CNRS, University of Le Mans, Faculté des Sciences et Techniques, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France.
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57
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Joannes C, Sipaut CS, Dayou J, Yasir SM, Mansa RF. Review Paper on Cell Membrane Electroporation of Microalgae using Electric Field Treatment Method for Microalgae Lipid Extraction. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1757-899x/78/1/012034] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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58
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Luengo E, Martínez JM, Coustets M, Álvarez I, Teissié J, Rols MP, Raso J. A Comparative Study on the Effects of Millisecond- and Microsecond-Pulsed Electric Field Treatments on the Permeabilization and Extraction of Pigments from Chlorella vulgaris. J Membr Biol 2015; 248:883-91. [PMID: 25819916 DOI: 10.1007/s00232-015-9796-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 03/17/2015] [Indexed: 10/23/2022]
Abstract
The interdependencies of the two main processing parameters affecting "electroporation" (electric field strength and pulse duration) while using pulse duration in the range of milliseconds and microseconds on the permeabilization, inactivation, and extraction of pigments from Chlorella vulgaris was compared. While irreversible "electroporation" was observed above 4 kV/cm in the millisecond range, electric field strengths of ≥10 kV/cm were required in the microseconds range. However, to cause the electroporation of most of the 90 % of the population of C. vulgaris in the millisecond (5 kV/cm, 20 pulses) or microsecond (15 kV/cm, 25 pulses) range, the specific energy that was delivered was lower for microsecond treatments (16.87 kJ/L) than in millisecond treatments (150 kJ/L). In terms of the specific energy required to cause microalgae inactivation, treatments in the microsecond range also resulted in greater energy efficiency. The comparison of extraction yields in the range of milliseconds (5 kV, 20 ms) and microseconds (20, 25 pulses) under the conditions in which the maximum extraction was observed revealed that the improvement in the carotenoid extraction was similar and chlorophyll a and b extraction was slightly higher for treatments in the microsecond range. The specific energy that was required for the treatment in the millisecond range (150 kJ/L) was much higher than those required in the microsecond range (30 kJ/L). The comparison of the efficacy of both types of pulses on the extraction enhancement just after the treatment and after a post-pulse incubation period seemed to indicate that PEF in the millisecond range created irreversible alterations while, in the microsecond range, the defects were a dynamic structure along the post-pulse time that caused a subsequent increment in the extraction yield.
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Affiliation(s)
- Elisa Luengo
- Tecnología de los Alimentos, Facultad de Veterinaria, Universidad de Zaragoza, C/Miguel Servet, 177, 50013, Saragossa, Spain
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59
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Günerken E, D'Hondt E, Eppink MHM, Garcia-Gonzalez L, Elst K, Wijffels RH. Cell disruption for microalgae biorefineries. Biotechnol Adv 2015; 33:243-60. [PMID: 25656098 DOI: 10.1016/j.biotechadv.2015.01.008] [Citation(s) in RCA: 279] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/06/2015] [Accepted: 01/27/2015] [Indexed: 11/16/2022]
Abstract
Microalgae are a potential source for various valuable chemicals for commercial applications ranging from nutraceuticals to fuels. Objective in a biorefinery is to utilize biomass ingredients efficiently similarly to petroleum refineries in which oil is fractionated in fuels and a variety of products with higher value. Downstream processes in microalgae biorefineries consist of different steps whereof cell disruption is the most crucial part. To maintain the functionality of algae biochemicals during cell disruption while obtaining high disruption yields is an important challenge. Despite this need, studies on mild disruption of microalgae cells are limited. This review article focuses on the evaluation of conventional and emerging cell disruption technologies, and a comparison thereof with respect to their potential for the future microalgae biorefineries. The discussed techniques are bead milling, high pressure homogenization, high speed homogenization, ultrasonication, microwave treatment, pulsed electric field treatment, non-mechanical cell disruption and some emerging technologies.
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Affiliation(s)
- E Günerken
- VITO NV, Boeretang 200, 2400 Mol, Belgium; Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands.
| | - E D'Hondt
- VITO NV, Boeretang 200, 2400 Mol, Belgium.
| | - M H M Eppink
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands.
| | | | - K Elst
- VITO NV, Boeretang 200, 2400 Mol, Belgium.
| | - R H Wijffels
- Wageningen University, Bioprocess Engineering, AlgaePARC, P.O. Box 16, 6700 AA Wageningen, Netherlands; University of Nordland, Faculty of Biosciences and Aquaculture, N-8049 Bodø, Norway.
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60
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Pulsed electric field assisted extraction of nutritionally valuable compounds from microalgae Nannochloropsis spp. using the binary mixture of organic solvents and water. INNOV FOOD SCI EMERG 2015. [DOI: 10.1016/j.ifset.2014.11.002] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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61
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Krehbiel JD, Schideman LC, King DA, Freund JB. Algal cell disruption using microbubbles to localize ultrasonic energy. BIORESOURCE TECHNOLOGY 2014; 173:448-451. [PMID: 25311188 PMCID: PMC4412598 DOI: 10.1016/j.biortech.2014.09.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 09/14/2014] [Accepted: 09/15/2014] [Indexed: 05/09/2023]
Abstract
Microbubbles were added to an algal solution with the goal of improving cell disruption efficiency and the net energy balance for algal biofuel production. Experimental results showed that disruption increases with increasing peak rarefaction ultrasound pressure over the range studied: 1.90 to 3.07 MPa. Additionally, ultrasound cell disruption increased by up to 58% by adding microbubbles, with peak disruption occurring in the range of 10(8)microbubbles/ml. The localization of energy in space and time provided by the bubbles improve efficiency: energy requirements for such a process were estimated to be one-fourth of the available heat of combustion of algal biomass and one-fifth of currently used cell disruption methods. This increase in energy efficiency could make microbubble enhanced ultrasound viable for bioenergy applications and is expected to integrate well with current cell harvesting methods based upon dissolved air flotation.
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Affiliation(s)
- Joel D Krehbiel
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, United States
| | - Lance C Schideman
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, United States.
| | - Daniel A King
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, United States
| | - Jonathan B Freund
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, United States; Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, United States
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62
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Lai YS, Parameswaran P, Li A, Baez M, Rittmann BE. Effects of pulsed electric field treatment on enhancing lipid recovery from the microalga, Scenedesmus. BIORESOURCE TECHNOLOGY 2014; 173:457-461. [PMID: 25311186 DOI: 10.1016/j.biortech.2014.09.124] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/23/2014] [Accepted: 09/24/2014] [Indexed: 06/04/2023]
Abstract
Chloroform and methanol are superior solvents for lipid extraction from photosynthetic microorganisms, because they can overcome the resistance offered by the cell walls and membranes, but they are too toxic and expensive to use for large-scale fuel production. Biomass from the photosynthetic microalga Scenedesmus, subjected to a commercially available pre-treatment technology called Focused-Pulsed® (FP), yielded 3.1-fold more crude lipid and fatty acid methyl ester (FAME) after extraction with a range of solvents. FP treatment increased the FAME-to-crude-lipid ratio for all solvents, which means that the extraction of non-lipid materials was minimized, while the FAME profile itself was unchanged compared to the control. FP treatment also made it possible to use only a small proportion of chloroform and methanol, along with isopropanol, to obtain equivalent yields of lipid and FAME as with 100% chloroform plus methanol.
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Affiliation(s)
- YenJung Sean Lai
- Swette Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, P.O. Box 875701, Tempe, AZ 85287-5701, USA
| | - Prathap Parameswaran
- Swette Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, P.O. Box 875701, Tempe, AZ 85287-5701, USA.
| | - Ang Li
- Swette Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, P.O. Box 875701, Tempe, AZ 85287-5701, USA; State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, People's Republic of China
| | - Maria Baez
- Swette Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, P.O. Box 875701, Tempe, AZ 85287-5701, USA
| | - Bruce E Rittmann
- Swette Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, P.O. Box 875701, Tempe, AZ 85287-5701, USA
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63
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Barba FJ, Grimi N, Vorobiev E. New Approaches for the Use of Non-conventional Cell Disruption Technologies to Extract Potential Food Additives and Nutraceuticals from Microalgae. FOOD ENGINEERING REVIEWS 2014. [DOI: 10.1007/s12393-014-9095-6] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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64
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Coons JE, Kalb DM, Dale T, Marrone BL. Getting to low-cost algal biofuels: A monograph on conventional and cutting-edge harvesting and extraction technologies. ALGAL RES 2014. [DOI: 10.1016/j.algal.2014.08.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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65
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Effect of pulsed electric field treatments on permeabilization and extraction of pigments from Chlorella vulgaris. J Membr Biol 2014; 247:1269-77. [PMID: 24880235 DOI: 10.1007/s00232-014-9688-2] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 05/14/2014] [Indexed: 10/25/2022]
Abstract
The effect of pulsed electric field (PEF) treatments of different intensities on the electroporation of the cytoplasmatic membrane of Chlorella vulgaris, and on the extraction of carotenoids and chlorophylls were investigated. Staining the cells with propidium iodide before and after the PEF treatment revealed the existence of reversible and irreversible electroporation. Application of PEF treatments in the range of 20-25 kV cm(-1) caused most of the population of C. vulgaris to be irreversibly electroporated even at short treatment times (5 pulses of 3 µs). However, at lower electric field strengths (10 kV cm(-1)), cells that were reversibly electroporated were observed even after 50 pulses of 3 µs. The electroporation of C. vulgaris cells by PEF higher than 15 kV cm(-1) and duration is higher than 15 µs increased significantly the extraction yield of intracellular components of C. vulgaris. The application of a 20 kV cm(-1) for 75 μs increased the extraction yield just after the PEF treatment of the carotenoids, and chlorophylls a and b 0.5, 0.7, and 0.8 times, respectively. However, further increments in electric field strength and treatment time did not cause significant increments in the extraction yield. The extraction of carotenoids from PEF-treated C. vulgaris cells after 1 h of the application of the treatment significantly increased the extraction yield in comparison to the yield obtained from the cells extracted just after the PEF treatment. After PEF treatment at 20 kV cm(-1) for 75 µs, extraction yield for carotenoids, and chlorophylls a and b increased 1.2, 1.6, and 2.1 times, respectively. A high correlation was observed between irreversible electroporation and percentage of yield increase when the extraction was conducted after 1 h of the application of PEF treatment (R: 0.93), but not when the extraction was conducted just after PEF treatment (R: 0.67).
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66
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Bai X, Naghdi FG, Ye L, Lant P, Pratt S. Enhanced lipid extraction from algae using free nitrous acid pretreatment. BIORESOURCE TECHNOLOGY 2014; 159:36-40. [PMID: 24632439 DOI: 10.1016/j.biortech.2014.01.133] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/29/2014] [Accepted: 01/31/2014] [Indexed: 06/03/2023]
Abstract
Lipid extraction has been identified as a major bottleneck for large-scale algal biodiesel production. In this work free nitrous acid (FNA) is presented as an effective and low cost pretreatment to enhance lipid recovery from algae. Two batch tests, with a range of FNA additions, were conducted to disrupt algal cells prior to lipid extraction by organic solvents. Total accessible lipid content was quantified by the Bligh and Dyer method, and was found to increase with pretreatment time (up to 48 h) and FNA concentration (up to 2.19 mg HNO2-N/L). Hexane extraction was used to study industrially accessible lipids. The mass transfer coefficient (k) for lipid extraction using hexane from algae treated with 2.19 mg HNO2-N/L FNA was found to be dramatically higher than for extraction from untreated algae. Consistent with extraction results, cell disruption analysis indicated the disruption of the cell membrane barrier.
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Affiliation(s)
- Xue Bai
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Forough Ghasemi Naghdi
- School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Liu Ye
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Paul Lant
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Steven Pratt
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.
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67
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González-Sosa J, Ruiz-Vargas A, Arias G, Ivorra A. Fast flow-through non-thermal pasteurization using constant radiofrequency electric fields. INNOV FOOD SCI EMERG 2014. [DOI: 10.1016/j.ifset.2014.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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68
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Daghrir R, Igounet L, Brar SK, Drogui P. Novel electrochemical method for the recovery of lipids from microalgae for biodiesel production. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2013.04.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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69
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Ganeva V, Galutzov B, Teissie J. Evidence that pulsed electric field treatment enhances the cell wall porosity of yeast cells. Appl Biochem Biotechnol 2013; 172:1540-52. [PMID: 24222499 DOI: 10.1007/s12010-013-0628-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 10/30/2013] [Indexed: 12/01/2022]
Abstract
The application of rectangular electric pulses, with 0.1-2 ms duration and field intensity of 2.5-4.5 kV/cm, to yeast suspension mediates liberation of cytoplasmic proteins without cell lysis. The aim of this study was to evaluate the effect of pulsed electric field with similar parameters on cell wall porosity of different yeast species. We found that electrically treated cells become more susceptible to lyticase digestion. In dependence on the strain and the electrical conditions, cell lysis was obtained at 2-8 times lower enzyme concentration in comparison with control untreated cells. The increase of the maximal lysis rate was between two and nine times. Furthermore, when applied at low concentration (1 U/ml), the lyticase enhanced the rate of protein liberation from electropermeabilized cells without provoking cell lysis. Significant differences in the cell surface of control and electrically treated cells were revealed by scanning electron microscopy. Data presented in this study allow us to conclude that electric field pulses provoke not only plasma membrane permeabilization, but also changes in the cell wall structure, leading to increased wall porosity.
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Affiliation(s)
- Valentina Ganeva
- Department of Biophysics and Radiobiology, Sofia University, 8 Dragan Tzankov Blvd, 1164, Sofia, Bulgaria,
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70
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Kim J, Yoo G, Lee H, Lim J, Kim K, Kim CW, Park MS, Yang JW. Methods of downstream processing for the production of biodiesel from microalgae. Biotechnol Adv 2013; 31:862-76. [DOI: 10.1016/j.biotechadv.2013.04.006] [Citation(s) in RCA: 378] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 04/13/2013] [Accepted: 04/18/2013] [Indexed: 11/26/2022]
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Inducible cell lysis systems in microbial production of bio-based chemicals. Appl Microbiol Biotechnol 2013; 97:7121-9. [DOI: 10.1007/s00253-013-5100-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 07/04/2013] [Accepted: 07/05/2013] [Indexed: 02/02/2023]
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72
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Flow Process for Electroextraction of Total Proteins from Microalgae. J Membr Biol 2013; 246:751-60. [DOI: 10.1007/s00232-013-9542-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 03/22/2013] [Indexed: 10/27/2022]
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Zbinden MDA, Sturm BS, Nord RD, Carey WJ, Moore D, Shinogle H, Stagg-Williams SM. Pulsed electric field (PEF) as an intensification pretreatment for greener solvent lipid extraction from microalgae. Biotechnol Bioeng 2013; 110:1605-15. [DOI: 10.1002/bit.24829] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 12/10/2012] [Accepted: 12/20/2012] [Indexed: 11/09/2022]
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Liu J, Chen L, Wang J, Qiao J, Zhang W. Proteomic analysis reveals resistance mechanism against biofuel hexane in Synechocystis sp. PCC 6803. BIOTECHNOLOGY FOR BIOFUELS 2012; 5:68. [PMID: 22958739 PMCID: PMC3479031 DOI: 10.1186/1754-6834-5-68] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2012] [Accepted: 08/30/2012] [Indexed: 05/19/2023]
Abstract
BACKGROUND Recent studies have demonstrated that photosynthetic cyanobacteria could be an excellent cell factory to produce renewable biofuels and chemicals due to their capability to utilize solar energy and CO2 as the sole energy and carbon sources. Biosynthesis of carbon-neutral biofuel alkanes with good chemical and physical properties has been proposed. However, to make the process economically feasible, one major hurdle to improve the low cell tolerance to alkanes needed to be overcome. RESULTS Towards the goal to develop robust and high-alkane-tolerant hosts, in this study, the responses of model cyanobacterial Synechocystis PCC 6803 to hexane, a representative of alkane, were investigated using a quantitative proteomics approach with iTRAQ - LC-MS/MS technologies. In total, 1,492 unique proteins were identified, representing about 42% of all predicted protein in the Synechocystis genome. Among all proteins identified, a total of 164 and 77 proteins were found up- and down-regulated, respectively. Functional annotation and KEGG pathway enrichment analyses showed that common stress responses were induced by hexane in Synechocystis. Notably, a large number of transporters and membrane-bound proteins, proteins against oxidative stress and proteins related to sulfur relay system and photosynthesis were induced, suggesting that they are possibly the major protection mechanisms against hexane toxicity. CONCLUSION The study provided the first comprehensive view of the complicated molecular mechanism employed by cyanobacterial model species, Synechocystis to defend against hexane stress. The study also provided a list of potential targets to engineer Synechocystis against hexane stress.
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Affiliation(s)
- Jie Liu
- School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin 300072, P.R. China
| | - Lei Chen
- School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin 300072, P.R. China
| | - Jiangxin Wang
- School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin 300072, P.R. China
| | - Jianjun Qiao
- School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin 300072, P.R. China
| | - Weiwen Zhang
- School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
- Key Laboratory of Systems Bioengineering, Ministry of Education of China, Tianjin 300072, P.R. China
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