1
|
Fushimi C, Tachibana C, Tomita R, Sakurai M. Optimization of Energy Consumption and Cost in Solvent Recovery Section for Large-Scale Biofuel Production from Microalgae. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2018. [DOI: 10.1252/jcej.17we402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chihiro Fushimi
- Department of Chemical Engineering, Tokyo University of Agriculture and Technology
| | - Chiemi Tachibana
- Department of Chemical Engineering, Tokyo University of Agriculture and Technology
| | - Ryo Tomita
- Department of Chemical Engineering, Tokyo University of Agriculture and Technology
| | - Makoto Sakurai
- Department of Chemical Engineering, Tokyo University of Agriculture and Technology
| |
Collapse
|
2
|
Mechanical cell disruption of microalgae for investigating the effects of degree of disruption on hydrocarbon extraction. ASIA-PAC J CHEM ENG 2017. [DOI: 10.1002/apj.2088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
3
|
Furuhashi K, Noguchi T, Okada S, Hasegawa F, Kaizu Y, Imou K. The surface structure of Botryococcus braunii colony prevents the entry of extraction solvents into the colony interior. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.02.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
4
|
Atobe S, Saga K, Hasegawa F, Furuhashi K, Tashiro Y, Suzuki T, Okada S, Imou K. Effect of amphiphilic polysaccharides released from Botryococcus braunii Showa on hydrocarbon recovery. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Atobe S, Saga K, Maeyama H, Fujiwara K, Okada S, Imou K. Culture of the green microalga Botryococcus braunii Showa with LED irradiation eliminating violet light enhances hydrocarbon production and recovery. Biosci Biotechnol Biochem 2014; 78:1765-71. [PMID: 25069809 DOI: 10.1080/09168451.2014.932663] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The green microalga Botryococcus braunii (B. braunii), race B, was cultured under light-emitting diode (LED) irradiation with and without violet light. This study examined the effect of violet light on hydrocarbon recovery and production in B. braunii. C34 botryococcene hydrocarbons were efficiently extracted by thermal pretreatments at lower temperatures when the alga was cultured without violet light. The hydrocarbon content was also higher (approximately 3%) in samples cultured without violet light. To elucidate the mechanism of effective hydrocarbon recovery and production, we examined structural components of the extracellular matrix (ECM). The amounts of extracellular carotenoids and water-soluble polymers extracted by thermal pretreatment from the ECM were decreased when the alga was cultured without violet light. These results indicate that LED irradiation without violet light is more effective for hydrocarbon recovery and production in B. braunii. Furthermore, structural ECM components are closely involved in hydrocarbon recovery and production in B. braunii.
Collapse
Affiliation(s)
- Sueko Atobe
- a Graduate School of Agricultural and Life Sciences, The University of Tokyo , Tokyo , Japan
| | | | | | | | | | | |
Collapse
|
6
|
Suzuki R, Ito N, Uno Y, Nishii I, Kagiwada S, Okada S, Noguchi T. Transformation of lipid bodies related to hydrocarbon accumulation in a green alga, Botryococcus braunii (Race B). PLoS One 2013; 8:e81626. [PMID: 24339948 PMCID: PMC3855424 DOI: 10.1371/journal.pone.0081626] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 10/23/2013] [Indexed: 12/27/2022] Open
Abstract
The colonial microalga Botryococcus braunii accumulates large quantities of hydrocarbons mainly in the extracellular space; most other oleaginous microalgae store lipids in the cytoplasm. Botryococcus braunii is classified into three principal races (A, B, and L) based on the types of hydrocarbons. Race B has attracted the most attention as an alternative to petroleum by its higher hydrocarbon contents than the other races and its hydrocarbon components, botryococcenes and methylsqualenes, both can be readily converted into biofuels. We studied race B using fluorescence and electron microscopy, and clarify the stage when extracellular hydrocarbon accumulation occurs during the cell cycle, in a correlation with the behavior and structural changes of the lipid bodies and discussed development of the algal colony. New accumulation of lipids on the cell surface occurred after cell division in the basolateral region of daughter cells. While lipid bodies were observed throughout the cell cycle, their size and inclusions were dynamically changing. When cells began dividing, the lipid bodies increased in size and inclusions until the extracellular accumulation of lipids started. Most of the lipids disappeared from the cytoplasm concomitant with the extracellular accumulation, and then reformed. We therefore hypothesize that lipid bodies produced during the growth of B. braunii are related to lipid secretion. New lipids secreted at the cell surface formed layers of oil droplets, to a maximum depth of six layers, and fused to form flattened, continuous sheets. The sheets that combined a pair of daughter cells remained during successive cellular divisions and the colony increased in size with increasing number of cells.
Collapse
Affiliation(s)
- Reiko Suzuki
- Department of Biological Sciences, Nara Women's University, Nara, Nara, Japan
- Japan Science and Technology Agency-CREST, Chiyoda, Tokyo, Japan
| | - Naoko Ito
- Department of Biological Sciences, Nara Women's University, Nara, Nara, Japan
| | - Yuki Uno
- Department of Biological Sciences, Nara Women's University, Nara, Nara, Japan
| | - Ichiro Nishii
- Temasek Life Sciences Laboratory, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
- Japan Science and Technology Agency-CREST, Chiyoda, Tokyo, Japan
| | - Satoshi Kagiwada
- Department of Biological Sciences, Nara Women's University, Nara, Nara, Japan
- Japan Science and Technology Agency-CREST, Chiyoda, Tokyo, Japan
| | - Sigeru Okada
- Department of Aquatic Biosciences, the University of Tokyo, Bunkyo, Tokyo, Japan
- Japan Science and Technology Agency-CREST, Chiyoda, Tokyo, Japan
| | - Tetsuko Noguchi
- Department of Biological Sciences, Nara Women's University, Nara, Nara, Japan
- Japan Science and Technology Agency-CREST, Chiyoda, Tokyo, Japan
- * E-mail:
| |
Collapse
|
7
|
Koskimaki JE, Blazier AS, Clarens AF, Papin JA. Computational Models of Algae Metabolism for Industrial Applications. Ind Biotechnol (New Rochelle N Y) 2013. [DOI: 10.1089/ind.2013.0012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- Jacob E. Koskimaki
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA
| | - Anna S. Blazier
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA
| | - Andres F. Clarens
- Department of Civil and Environmental Engineering, University of Virginia, Charlottesville, VA
| | - Jason A. Papin
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA
| |
Collapse
|
8
|
Demura M, Ioki M, Kawachi M, Nakajima N, Watanabe MM. Desiccation tolerance of Botryococcus braunii (Trebouxiophyceae, Chlorophyta) and extreme temperature tolerance of dehydrated cells. JOURNAL OF APPLIED PHYCOLOGY 2013; 26:49-53. [PMID: 24600162 PMCID: PMC3918389 DOI: 10.1007/s10811-013-0059-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 05/21/2013] [Accepted: 05/22/2013] [Indexed: 06/03/2023]
Abstract
Botryococcus braunii Kützing, a green colonial microalga, occurs worldwide in both freshwater and brackish water environments. Despite considerable attention to B. braunii as a potential source of renewable fuel, many ecophysiological properties of this alga remain unknown. Here, we examined the desiccation and temperature tolerances of B. braunii using two newly isolated strains BOD-NG17 and BOD-GJ2. Both strains survived through 6- and 8-month desiccation treatments but not through a 12-month treatment. Interestingly, the desiccation-treated cells of B. braunii gained tolerance to extreme temperature shifts, i.e., high temperature (40 °C) and freezing (-20 °C). Both strains survived for at least 4 and 10 days at 40 and -20 °C, respectively, while the untreated cells barely survived at these temperatures. These traits would enable long-distance dispersal of B. braunii cells and may account for the worldwide distribution of this algal species. Extracellular substances such as polysaccharides and hydrocarbons seem to confer the desiccation tolerance.
Collapse
Affiliation(s)
- Mikihide Demura
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8577 Japan
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506 Japan
| | - Motohide Ioki
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8577 Japan
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506 Japan
| | - Masanobu Kawachi
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8577 Japan
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506 Japan
| | - Nobuyoshi Nakajima
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8577 Japan
- National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506 Japan
| | - Makoto M. Watanabe
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8577 Japan
| |
Collapse
|