JP6235210B2 - 微細藻類の培養方法 - Google Patents
微細藻類の培養方法 Download PDFInfo
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- 238000012136 culture method Methods 0.000 title claims description 10
- 238000012258 culturing Methods 0.000 claims description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 206010010071 Coma Diseases 0.000 claims 1
- 241001140502 Pseudococcomyxa Species 0.000 description 13
- 239000007789 gas Substances 0.000 description 12
- 238000005259 measurement Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 241000134090 Coccomyxa <Trebouxiophyceae> Species 0.000 description 10
- 239000003002 pH adjusting agent Substances 0.000 description 9
- 241000195628 Chlorophyta Species 0.000 description 8
- 241001423435 Watanabea Species 0.000 description 8
- 241000162833 Trebouxiophyceae sp. MBIC11204 Species 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000001139 pH measurement Methods 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 241000195493 Cryptophyta Species 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 108091028043 Nucleic acid sequence Proteins 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000001963 growth medium Substances 0.000 description 4
- 241001140504 Coccomyxa simplex Species 0.000 description 3
- 108020004414 DNA Proteins 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 230000035755 proliferation Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 108020004463 18S ribosomal RNA Proteins 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000012364 cultivation method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000012533 medium component Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/26—Means for regulation, monitoring, measurement or control, e.g. flow regulation of pH
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- C12M23/00—Constructional details, e.g. recesses, hinges
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
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- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/12—Unicellular algae; Culture media therefor
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Description
(実施例1)
屋外の開放系培養システム(500L)に、以下の組成を有する培養液を収容した。
アンモニア態窒素(尿素):9.8g
リン:560mg
カリウム:560mg
カルシウム:150mg
マグネシウム:170mg
キレート金属塩:85mg
培養液のpHは微細藻類の植株前に塩酸を用いて3.5に調整し、その後は調整しなかった。この培養液に、Pseudococcomyxa属近縁の微細藻類であるPseudochoricystis ellipsoidea N1株(MBIC11204)を、0.02g/lとなるように植株した。
培養中、培養液における藻体濃度とpHとを継続的に測定した。その測定結果を図1に示す。図1において「OD720」は培養液中の藻体濃度を示し、「pH」は培養液のpHを示す。また、培養終了後における藻体中の窒素濃度及び油脂含量を測定した。その結果を表1に示す。
(実施例2)
微細藻類として、Pseudococcomyxa属近縁の微細藻類であるPseudochoricystis ellipsoidea N1株(MBIC11204)の代わりに、同じPseudococcomyxa属近縁の微細藻類であるPseudochoricystis ellipsoidea Obi株(MBIC11220)を用いて、前記実施例1と同様に培養を行った。
(実施例3)
微細藻類として、Pseudochoricystis ellipsoidea N1株(MBIC11204)の代わりに、Coccomyxa simplex (UTEX274)を用いる点以外は前記実施例1と同様にして微細藻類の培養を行った。
(実施例4)
微細藻類として、Pseudochoricystis ellipsoidea N1株(MBIC11204)の代わりに、Coccomyxa chodatii (UTEXB266)を用いる点以外は前記実施例1と同様にして微細藻類の培養を行った。
(実施例5)
屋外の開放系培養システム(500L)に、以下の組成を有する培養液を収容した。
硝酸体態窒素(硝酸ナトリウム):27.3g
リン:560mg
カリウム:560mg
カルシウム:150mg
マグネシウム:170g
キレート金属塩:85mg
培養液のpHは微細藻類の植株前に塩酸を用いて3に調整し、その後は調整しなかった。この培養液に、Watanabeaクレードに帰属する単細胞緑藻類を、0.02g/lとなるように植株した。この微細藻類は、温泉湧出環境等において採取したサンプルから、pHが3であり、温度が15〜35℃の範囲内にある条件にてスクリーニングされた微細藻類である。この微細藻類がWatanabeaクレードに帰属する単細胞緑藻類であることはDNAの相同性により確認した。この微細藻類のDNA配列を、配列表の配列番号4〜6に示す。
(実施例6)
まず、前記実施例1と同じ微細藻類を用い、前記実施例1と同様に培養を行った。これを1回目の培養とする。その後、1回目の培養後の培養液から、微細藻類を回収し、回収後の培養液(微細藻類を実質的に含まない培養液)において、新たな微細藻類(前記実施例1と同じ微細藻類)を、前記実施例1と同様の方法で培養した。これを2回目の培養とする。培養液の培地組成に関しては、前記実施例1と同量添加した。
(実施例7)
温泉より採取したいろいろな微生物が混ざったものを用いて、実施例5と同様な方法で培養すると、Coccomyxa属およびその近縁生物群、Pseudococcomyxa属、又はWatanabeaクレードに帰属する単細胞緑藻類の微細藻類のみに増殖が見られた。Coccomyxa属およびその近縁生物群、Pseudococcomyxa属の微細藻類のDNA配列を、配列表の配列番号1〜3に示す。Watanabeaクレードに帰属する単細胞緑藻類の微細藻類のDNA配列を、配列表の配列番号4〜6に示す。
(実施例8)
温泉より採取したいろいろな微生物が混ざったものを用いて、実施例1と同様な方法で培養すると、Coccomyxa属およびその近縁生物群、Pseudococcomyxa属の微細藻類のみに増殖が見られた。Coccomyxa属およびその近縁生物群、Pseudococcomyxa属の微細藻類のDNA配列を、配列表の配列番号1〜3に示す。
(実施例9)
図3に、培養システム1の構成を表す。培養システム1は、レースウェイ型の培養槽3と、培養槽3中の培養液を攪拌する攪拌用パドル5と、培養液のpHを検知するpH測定センサ7と、培養液中のCO2濃度を検知するCO2濃度測定センサ9と、周知のコンピュータから成る制御部11と、培養液へのpH調整剤の投入を行うpH調整剤投入部13と、培養液へのCO2含有ガスの導入を行うCO2ガス導入部15と、を備える。
例えば、前記実施例1〜4、6、8において、尿素の代わりに、他のアンモニア態窒素を用いても略同様の効果を奏することができる。
7・・・pH測定センサ、9・・・CO2濃度測定センサ、11・・・制御部、
13・・・pH調整剤投入部、15・・・CO2ガス導入部
Claims (2)
- pHが4以下であり、アンモニア態窒素を含む培養液を用いて、コッコミクサ属およびその近縁生物群、又はシュードココミクサ属の微細藻類を屋外の開放系培養システムにおいて培養することを特徴とする微細藻類の培養方法。
- 前記微細藻類の培養に用いた前記培養液から前記微細藻類を回収し、回収後の前記培養液を用いて新たな前記微細藻類を屋外の開放系培養システムにおいて培養することを特徴とする請求項1記載の微細藻類の培養方法。
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JP2012273633A JP6235210B2 (ja) | 2012-12-14 | 2012-12-14 | 微細藻類の培養方法 |
US14/651,164 US9790461B2 (en) | 2012-12-14 | 2013-12-04 | Culture method and culture system for microalgae |
PCT/JP2013/007118 WO2014091718A1 (ja) | 2012-12-14 | 2013-12-04 | 微細藻類の培養方法及び培養システム |
AU2013358448A AU2013358448B2 (en) | 2012-12-14 | 2013-12-04 | Culture method and culture system for microalgae |
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WO (1) | WO2014091718A1 (ja) |
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JP6446774B2 (ja) | 2013-11-19 | 2019-01-09 | 株式会社デンソー | 緑藻の脂質蓄積変異体およびその利用 |
JP6613731B2 (ja) | 2015-09-02 | 2019-12-04 | 株式会社デンソー | トリグリセリド生産性が改良された真核微細藻類遺伝子改変株及びその利用 |
JP6589605B2 (ja) | 2015-12-01 | 2019-10-16 | 株式会社デンソー | 強光に耐性を示す緑藻突然変異体及びその利用 |
JP6897370B2 (ja) * | 2017-06-30 | 2021-06-30 | 株式会社デンソー | 低pHのKJ株培養水の処理方法 |
JP6911582B2 (ja) * | 2017-06-30 | 2021-07-28 | 栗田工業株式会社 | 低pH微細藻類培養水の処理方法 |
US11780756B2 (en) | 2018-10-16 | 2023-10-10 | Nutech Ventures | Integrated unicellular/filamentous algal production, harvesting and remediation system |
CN111115827B (zh) * | 2018-10-30 | 2022-06-28 | 中国石油化工股份有限公司 | 利用微藻脱除分子筛废水中氨氮的方法 |
WO2024132882A1 (en) | 2022-12-19 | 2024-06-27 | Hutanbio Ltd. | Lipid producing marine microalga |
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JPH05284962A (ja) | 1992-04-08 | 1993-11-02 | Tohoku Electric Power Co Inc | 微細藻類の培養方法 |
JP3459275B2 (ja) | 1993-03-02 | 2003-10-20 | 財団法人地球環境産業技術研究機構 | 新規微細藻類株及びそれを用いて二酸化炭素を固定する方法 |
JPH0759557A (ja) | 1993-08-26 | 1995-03-07 | Kaiyo Bio Technol Kenkyusho:Kk | 新規微細藻類 |
JP2798882B2 (ja) | 1994-02-24 | 1998-09-17 | 株式会社バイオポリマー・リサーチ | 繊維−バクテリアセルロース複合体の製造方法及び該方法によって得られ得る複合体 |
JP3035153B2 (ja) | 1994-04-27 | 2000-04-17 | 石川島播磨重工業株式会社 | 光合成生物の培養方法 |
JPH0856648A (ja) | 1994-08-22 | 1996-03-05 | Tokyo Electric Power Co Inc:The | 新規微細藻類株及びそれを用いてco2を固定する方法 |
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JP3181237B2 (ja) | 1997-03-17 | 2001-07-03 | 財団法人地球環境産業技術研究機構 | 微細藻クロレラ及び微細藻クロレラを用いたco2固定化法 |
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WO2010006228A2 (en) * | 2008-07-11 | 2010-01-14 | Eudes De Crecy | A method of producing fatty acids for biofuel, biodiesel, and other valuable chemicals |
US20110020914A1 (en) * | 2009-07-24 | 2011-01-27 | Novus International Inc | Methods for enhancing growth of organisms in an aqueous growth medium |
US9260685B2 (en) * | 2010-02-15 | 2016-02-16 | Univerve Ltd. | System and plant for cultivation of aquatic organisms |
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