JPS608114B2 - Methanol-based single cell protein production method - Google Patents

Methanol-based single cell protein production method

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Publication number
JPS608114B2
JPS608114B2 JP51032675A JP3267576A JPS608114B2 JP S608114 B2 JPS608114 B2 JP S608114B2 JP 51032675 A JP51032675 A JP 51032675A JP 3267576 A JP3267576 A JP 3267576A JP S608114 B2 JPS608114 B2 JP S608114B2
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JP
Japan
Prior art keywords
methanol
volume
vol
methylomonas
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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JP51032675A
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Japanese (ja)
Other versions
JPS52117482A (en
Inventor
フリツツ・ヴイ−グネル
ヘルマン・ザ−ム
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FUYUURU BIOTEKUNOROGITSUSHE FUORUSHUNKU MBH G
Original Assignee
FUYUURU BIOTEKUNOROGITSUSHE FUORUSHUNKU MBH G
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Priority to JP51032675A priority Critical patent/JPS608114B2/en
Publication of JPS52117482A publication Critical patent/JPS52117482A/en
Publication of JPS608114B2 publication Critical patent/JPS608114B2/en
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Description

【発明の詳細な説明】 人及び動物の栄養のための蛋白の需要増大が価値の高い
蛋白の製法の開発を必要とする。
DETAILED DESCRIPTION OF THE INVENTION The increasing demand for protein for human and animal nutrition necessitates the development of processes for producing high value proteins.

それで近年炭素源としてメタンなどのガス状炭化水素又
は石油溜分からの液状炭化水素が利用できる微生物から
の蛋白質生産が研究された。しかしガス状炭化水素は水
中の溶解度が低く、好気性培養条件では爆発性ガス混合
物が生じるという欠点がある。液状の炭化水素は同じく
水中の溶解度が最小で両液相の分散には大きなェネルギ
需要が前提となるという欠点がある。そのほか液状炭化
水素で育てた細胞集塊では少なくとも1回は有機溶媒を
用いて抽出を行なわねばならない。大量の微生物の培養
のためにとくに有利な炭素−及びエネルギー源として数
年来メタノールが議論されている。
Therefore, in recent years protein production from microorganisms that can utilize gaseous hydrocarbons such as methane or liquid hydrocarbons from petroleum distillates as carbon sources has been investigated. However, gaseous hydrocarbons have the disadvantage of low solubility in water and the formation of explosive gas mixtures under aerobic culture conditions. Liquid hydrocarbons also have the disadvantage of minimal solubility in water and the dispersion of both liquid phases requires high energy demands. In addition, cell aggregates grown in liquid hydrocarbons must be extracted at least once using an organic solvent. Methanol has been discussed for several years as a particularly advantageous carbon and energy source for the cultivation of large scale microorganisms.

この基質は化学的に明確にされた純粋な形で、かつ廉価
に合成用ガスから入手でき、そのガスは天然ガス、石油
溜分、石炭または褐炭などさまざまな原料から製造でき
るという利点がある。DT−OS2040358からは
、液状アルカンの酸化から生じるアルコール、アルデヒ
ド、ケトン、カルポン酸及びそれらの議導体を炭素源と
して用いる単細胞蛋白質の製造が公知となっている。
This substrate is available in chemically defined, pure form and at low cost from synthesis gas, which has the advantage that it can be produced from a variety of raw materials, such as natural gas, petroleum distillates, coal or lignite. From DT-OS 2040358, the production of single-cell proteins using alcohols, aldehydes, ketones, carboxylic acids and their derivatives resulting from the oxidation of liquid alkanes as carbon sources is known.

DT一AS2152039からは、Protamino
鼠Cterm戊r var. machi船n瓜
ATCC21611 ,ATCC21612,ATC
C21613又はATCC21614など細菌種を用い
てメタノール含有の培養煤質中で細菌細胞集塊を得るこ
とが公知となっている。DT−OS2311006から
は、メタノールを唯一の炭素源として好気性微生物Me
thylomonasmethanolicaNRRL
−B一5458を培養する蛋白質製法が公知となってい
る。DT−OS2059277からは、メタノールを唯
一の炭素源とした適切な培養液中で好気性条件の下に下
記の細菌種を用いる微生物蛋白質製法が公知とな つ
て い る : Pseudonis methani
ca ,Pseudomonas sp.ATCC21
438,Pseudomonassp.ATCC214
39,Pseudomonas sp.PRL−W−4
, Coひnebacterium sp.ATC
C21232 ,Coひnebacterium s
p.ATCC21235 及 びCoひnebacte
riumsp.ATCC212360DT−OS240
7740からは、任意のメタノール活用性細菌といくつ
かのメタノール活用性でない細菌とからなる混合煤義を
用いる微生物培養法が公知となっている。
From DT-AS2152039, Protamino
NezumiCterm戊r var. machi ship n melon
ATCC21611, ATCC21612, ATC
It is known to use bacterial species such as C21613 or ATCC21614 to obtain bacterial cell clusters in culture soot containing methanol. From DT-OS2311006, aerobic microorganism Me
thylomonas methanolicaNRRL
-Protein production methods for culturing B-5458 are known. From DT-OS2059277, a microbial protein production method using the following bacterial species under aerobic conditions in a suitable culture medium with methanol as the only carbon source is known.
Pseudonis methani
ca , Pseudomonas sp. ATCC21
438, Pseudomonas sp. ATCC214
39, Pseudomonas sp. PRL-W-4
, Cohinebacterium sp. ATC
C21232, Cohinebacterium s
p. ATCC21235 and Cohinebacte
riumsp. ATCC212360DT-OS240
7740, a microbial culture method using a mixed soot consisting of any methanol-utilizing bacteria and some non-methanol-utilizing bacteria is known.

メタノール活用性細菌は可動性ではなく、メタノールの
ほかにも他の炭素基質たとえばグルコーズ又はグリセリ
ンも炭素源として利用できる。DT−OS241838
5からは、微生物Pseudomonase丸orqu
ens(NCIB No.9399)から導かれた淡紅
顔料を加えてない菌種を用いる蛋白質の豊富な製品の製
法が公知となっている。
Methanol-utilizing bacteria are not mobile and, in addition to methanol, can also utilize other carbon substrates as carbon sources, such as glucose or glycerin. DT-OS241838
From 5 onwards, microorganism Pseudomonase round orqu
A method for producing a protein-rich product is known using a strain derived from P. ens (NCIB No. 9399) without the addition of a pink pigment.

メタノールからの蛋白質の培養のためにはこの技術の水
準により不可欠的にメタノールを利用する細菌ではなく
、任意にメチル摂取性の微生物が用いられる。
For the cultivation of proteins from methanol, according to the state of the art, methyl-uptake microorganisms are optionally used, rather than bacteria that indispensably utilize methanol.

この技術の水準は不可欠的にメチル摂取性の細菌を単細
胞蛋白質の培養のために利用する本発明の方法によって
超越される。Ludwigshafen市のRhein
河岸の土質試料からメタノ一ルを不可欠的に利用する細
菌が分離された。
This state of the art is surpassed by the method of the present invention which utilizes essentially methyl uptake bacteria for the cultivation of single cell proteins. Rhein in the city of Ludwigshafen
Bacteria that indispensably utilize methanol were isolated from riverbank soil samples.

土質試料1 夕 は、KH2P043.75夕;Na2
HP042509;(N比)2S044.00夕;M森
04・7日200.5夕;Ca(N03)2・4日20
0.025夕;FeS04・7比00.005夕;Zn
S04・日200.005夕を蒸溜水1000のとに溶
かしたpH7.0の水性無機培養媒体で唯一の炭素源及
びエネルギー源としてメタノール1%(容積/容積)を
含むもの100の‘‘こ懸濁させ500の‘三角フラス
コに入れ3000において振濠機(100回/分)上で
保温培養した。5日后に培養基を各0.1の【ずつべト
リ皿にすりつけた。
Soil sample 1 evening is KH2P043.75 evening; Na2
HP042509; (N ratio) 2S044.00 evening; M Mori 04/7th 200.5 evening; Ca (N03) 2nd/4th 20
0.025 evening; FeS04/7 ratio 00.005 evening; Zn
An aqueous inorganic culture medium of pH 7.0 containing 1% (volume/volume) methanol as the sole carbon and energy source, dissolved in 100% distilled water. The mixture was turbidly placed in a 500° Erlenmeyer flask and incubated at 3000° C. on a shaker (100 times/min). After 5 days, 0.1 ml of each culture medium was applied to the petri dish.

皿は固定のため同じ媒体で寒天2%を含むものを収容し
ていた。これらの皿でさらに3日間30qoで培養した
后これらから個々のコロニを探り同じ媒体で血に稀釈塗
抹し液体反復培養5回の后菌種の純粋培養が得られた。
この細菌菌種はMe比ylomoMssp.と命名され
、DSM580の番号がつけられた(ドイツ連邦共和国
特許第245斑51号明細書参照)。今回メタノールを
基質とする単細胞蛋白質を得る方法で、機械的燈梓手段
を備え又は備えていない・ガスの供給される反応器にお
いて不可欠的にメタノールを利用する細菌Methyl
omonassp.DSM580を含む成長性の液下培
養を好気性条件の下で作り出し、その内には唯一の炭素
−及びエネルギー源としてのメタノール・無機養分及び
場合により発育素があり、そのほかにこの系には空気又
は酸素富化した空気を20なし、し45qoの反応温度
において送入し、その后に生じた三相系から細胞集塊を
分離し乾燥させ、その際粗蛋白分少なくとも60−7の
重量%、核酸分2一10重量%、灰分3一6重量%、脂
肪分3一8重量%の細胞集塊が得られ、これを分離した
液相は場合により全部又は一部を操作過程に再循環させ
ることを特徴とするものが見出だされた。養分とは炭素
−及びエネルギー源のほかに微生物によって吸収されそ
の成長に必要なアニオン及びカチオンを含んでいる化合
物である。
The dishes contained the same medium containing 2% agar for fixation. After incubation in these dishes for an additional 3 days at 30 qo, individual colonies were probed from these and diluted and smeared in blood with the same medium to obtain a pure culture of the bacterial species with 5 liquid replicates.
This bacterial species is MeilomoMssp. and numbered DSM580 (see German Patent No. 245 Patent No. 51). This is a method for obtaining single-cell proteins using methanol as a substrate, with or without mechanical lighting means.Methyl bacteria that indispensably utilize methanol in a gas-supplied reactor.
omonassp. A viable submerged culture containing DSM580 is created under aerobic conditions, with methanol as the sole carbon and energy source, inorganic nutrients and optionally growth prime; Alternatively, oxygen-enriched air is introduced at a reaction temperature of 20% and 45%, after which the cell clumps are separated from the resulting three-phase system and dried, with a crude protein content of at least 60% by weight. A cell agglomerate with a nucleic acid content of 2-10% by weight, an ash content of 3-6% and a fat content of 3-8% by weight is obtained, and the liquid phase from which this is separated is recycled, in whole or in part, to the operating process. A device has been found that is characterized by the ability to Nutrients are compounds that, in addition to carbon and energy sources, contain anions and cations that are absorbed by microorganisms and necessary for their growth.

発育素とは微生物にとつて必要であるが微生物自体では
十分な量が合成できない天然のまた合成の化合物である
Growth elements are natural and synthetic compounds that are necessary for microorganisms but cannot be synthesized in sufficient quantities by the microorganisms themselves.

本発明の単細胞蛋白質を得る方法は下記の特性を備えた
・不可欠的にメタノールを利用する細菌Methylo
moMssp.DSM580を生産する:1.細胞形態
:0.3一0.6×1.0−1.8仏の範囲の小樟状で
一極の鞭毛で可動2.コロニ形態: 透明、白色、円形及び平滑、2一3日后には直径約1一
2側3.菌種特性: グラム陰性、乾燥細胞集塊は微淡紅 4.生理: 強好気、カタラーゼ陽性、メタノールーデヒドロゲナー
ゼ陽性、ヘキソースーホスフア一ト・ジンテターゼ腸性
、ヒドロキシピルヴアト・レドクターゼ陰性5.成長特
性: 最小 最適 最大温度(℃) 2
0 33一36 45PH 4.5
6.5一7.5 9.5メタノール濃度%(V/V
) 0.5−1.55.0細菌Methylomo岬s
sp.はGo比in鉾nのドイツ国微生物集大成に番号
DSM580を附して寄託された。
The method for obtaining single-cell proteins of the present invention is based on Methylo, a bacterium that has the following characteristics and that uses methanol indispensably.
moMssp. Producing DSM580: 1. Cell morphology: Small camphor-shaped in the range of 0.3-0.6 x 1.0-1.8 cells, movable with unipolar flagella 2. Colony morphology: transparent, white, round and smooth, about 1-2 sides in diameter after 2-3 days3. Bacterial species characteristics: Gram negative, dry cell aggregates are slightly pink 4. Physiology: Strong aerobic, positive for catalase, positive for methanol dehydrogenase, positive for hexose-phosphate dilutetase, negative for hydroxypyruvate redactase5. Growth characteristics: Minimum Optimum Maximum temperature (℃) 2
0 33-36 45PH 4.5
6.5-7.5 9.5 Methanol concentration% (V/V
) 0.5-1.55.0 bacterial Methylomo capes
sp. was deposited with the number DSM580 in the German Collection of Microorganisms in Japan.

Methylomonassp.DSM580は表から
判明するとおりメタノールを炭素−及びエネルギー源と
して成長できこれに反してメタン、メチルアミン、エタ
ノール又はグルコーズでは成長しない。
Methylomonass sp. As can be seen from the table, DSM580 can grow on methanol as a carbon and energy source, whereas it does not grow on methane, methylamine, ethanol or glucose.

好気性条件下での水性無機培養媒体中での各種炭素源に
よるMethylomo雌ssp.DSM580の成長
基 質 生長1) 基 質 成長メ タ ン
ブロバノール(1)メタノール + フロ
バノール(2メチルァミン ー 酢 酸 塩 ホルムァルデヒド − 乳 酸 塩 蟻酸塩 ビルヴィン酸塩 エタノール 肉桂酸塩 梅機酸塩 フルクトース グルコース セ リ ン1)十成長
一成長なし さらにMethylomonassp.DSM580は
回分式作業の場合初期メタノール濃度0.5−5.批容
積%とくに2−3容積%で得られ、またその場合制御し
てメタノール濃度を0.01−2.餌容積%に恒常に保
ってメタノールの総転化率2虫容積%まで培養されるこ
とが見出だされた。
Methylomo female ssp. with various carbon sources in aqueous mineral culture medium under aerobic conditions. DSM580 growth substrate Growth 1) Substrate Growth methane
Brovanol (1) Methanol + Flobanol (2) Methylamine - Acetic acid Formaldehyde - Lactic acid Salt Formate Biruvate Ethanol Lacinate Metric acid Fructose Glucose Serine 1) Ten growth
No growth and Methylomonass sp. DSM580 has an initial methanol concentration of 0.5-5. % by volume, in particular 2-3% by volume, and in which case the methanol concentration can be controlled to 0.01-2. It has been found that the total methanol conversion rate can be maintained at 2% by volume of the insects when cultured at a constant feed volume%.

またMe比ylomo岬ssp.DSM580は化学的
又は混濁的に静的な条件下で0.1−0.5容積/容積
/時間の流量で連続的に作業する場合に得られることが
見出だされた。
Also Mehilomo Misaki ssp. It has been found that DSM580 is obtained when working continuously under chemically or turbiditically static conditions with a flow rate of 0.1-0.5 vol/vol/hr.

そのほか成長中にはアルカリないし酸の添加によって4
.5一9.0、望ましくは6.5一7.5の実質上垣常
のpH値を調整することが見出だされた。
In addition, during growth, by adding alkali or acid, 4
.. It has been found that substantially constant pH values can be adjusted between 5 and 9.0, preferably between 6.5 and 7.5.

さらにMethylomonassp.DSM580の
培養は20なし・し45ooの温度において望ましくは
33なし、し36℃で実施することが見出だされた。ま
た培養中には反応器に空気又は酸素富化した空気を0.
5−1.&容積/容積/分の空気流量で送入し、導入さ
れたガス混合物の酸素含有量は20ないし6彼容積%で
あることが見出だされた。
Furthermore, Methylomonass sp. It has been found that culturing of DSM580 is carried out at temperatures between 20°C and 45°C, preferably between 33°C and 36°C. Also, during culture, air or oxygen-enriched air is supplied to the reactor at 0.00%.
5-1. The oxygen content of the gas mixture introduced was found to be between 20 and 6% by volume, delivered with an air flow rate of &volume/volume/min.

さらに養分水溶液は窒素源としてアンモニウ塩及び/又
は硝酸塩及び/又は尿素ならびに成長に必要なカチオン
、ナトリウム、カリウム、マグネシウム、カルシウム、
鉄t亜鉛、マンガン及びアニオン、燐酸塩、硫酸塩、硝
酸塩、塩化物及び発育素を含むことが見出だされた。
In addition, the nutrient aqueous solution contains ammonium salts and/or nitrates and/or urea as a nitrogen source and cations necessary for growth, such as sodium, potassium, magnesium, calcium,
It was found to contain iron, zinc, manganese and anions, phosphates, sulfates, nitrates, chlorides and trophins.

本発明の方法を下記の実施例によって詳細説明する:実
施例 1 ( NH4 )2S04200 夕 、KH2P041
50 夕 、Na2HP04125 夕 、MgS04
・7日2025 夕 、Ca(N03)2・岬201.
25夕、FeS0417日200.25夕、ZnS04
・日200.25夕、Kclo.25夕を水50そに溶
かした組成の養分溶液50〆を満たした80そ生物反応
器を10分120ooで滅菌し、3500に冷却し、無
菌でメタノールを1000の{加え、Me比ylomo
船s sp.DSM斑0接種物500の‘で接種し、タ
ーボ櫨梓機(300回/分)を用いて35ooで28時
間懸濁させ、0.7容積/容積/分の空気流量で培養す
る。
The method of the present invention is illustrated in detail by the following example: Example 1 (NH4)2S04200 Evening, KH2P041
50 Yu, Na2HP04125 Yu, MgS04
・7th 2025 Evening, Ca (N03) 2, Cape 201.
25 evening, FeS04 17th 200.25 evening, ZnS04
・Sunday 200.25 evening, Kclo. Sterilize an 80 microorganism reactor filled with 50% of a nutrient solution of 25% water dissolved in 50% water for 10 minutes at 120°C, cool to 3500°C, add 1000% methanol under sterile conditions,
ship s sp. The DSM spot 0 inoculum is inoculated with 500' and suspended for 28 hours at 350°C using a turbo machine (300 times/min) and incubated at an air flow rate of 0.7 vol/vol/min.

培養中は液下培養に6容積%アンモニア溶液の自動添加
により恒常のpH値7.0を維持する。22時間后に反
応器を1500に冷却させ、硫酸の添加によりpH値を
3.0に調整し、沈降する細胞集塊を炉別し水で洗い乾
燥させる(乾燥繋曲胞集塊324夕)。
During cultivation, a constant pH value of 7.0 is maintained by automatically adding 6% by volume ammonia solution to the submerged culture. After 22 hours, the reactor is cooled to 1500 ℃, the pH value is adjusted to 3.0 by adding sulfuric acid, and the sedimented cell agglomerates are separated from the furnace, washed with water and dried (dried tethered cell agglomerates 324 hours). .

細胞組成は粗蛋白71%、核酸9%、灰分4%、脂肪7
%(乾燥細胞集塊を基準として)である。実施例 2 バーゼル市Biologische Vehahren
sにchnikAG製作の“lnにnsor”を装備し
た340〆生物反応器に養分塩溶液200夕(組成:(
NH4)2S04500夕 、 NH4N03500
夕 、 KH2P04600 夕 、Na2HP045
00 夕 、 MgS047日20140 夕 、 C
a(N08)24日2015夕、FeS04・7日20
6夕、Kc12夕を水道水200れこ溶解)を装入し、
pH値を6.8に調整し、15分間121℃で滅菌し3
ギ0に冷却させ無菌でメタノール2000泌を加え、M
ethylomonassp.DSM580の2報時間
準備培養4000の【を接種し、3300において空気
流量0.5容積/容積/分及び回転数180の副/分で
培養する。
Cell composition: crude protein 71%, nucleic acid 9%, ash 4%, fat 7%
% (based on dry cell mass). Example 2 Biologische Vehahren, Basel
Nutrient salt solution 200 μm (composition: (
NH4)2S04500 evening, NH4N03500
Evening, KH2P04600 Evening, Na2HP045
00 Evening, MgS047th 20140 Evening, C
a (N08) 24th 2015 evening, FeS04/7th 20th
6th night, charge Kc12th night (dissolved with 200% tap water),
Adjust the pH value to 6.8 and sterilize at 121 °C for 15 minutes.
Cool to 0.5 ml, add 2,000 ml of methanol under sterile conditions, and
ethylomonass sp. A two-time preparatory culture of DSM 580 is inoculated with 4000 ml and incubated at 3300 ml with an air flow rate of 0.5 vol/vol/min and a rotational speed of 180 sub/min.

成長中は液下培養のメタノール濃度は自動的に、液相濃
度に対応する排ガス中のメタノールの気相濃度を火炎イ
オン化検出器により連続的に把握し限界値発信器を介し
て必要なメタノール添加を操作して、恒常に0.接客積
%に保ち、そのほかpH調節器を用いてアンモニア12
容積%溶液の添加により自動的にpH値を6.81こ維
持する。2期時間にすでに夕あたり14夕の乾燥細胞集
塊の細胞濃度に達した后、空気流量を一定に保ちながら
酸素含量の4咳容積%の酸素富化空気を送入する。
During growth, the methanol concentration in the submerged culture is automatically determined, and the gas phase concentration of methanol in the exhaust gas corresponding to the liquid phase concentration is continuously determined by a flame ionization detector, and the necessary methanol addition is performed via a limit value transmitter. By operating , it is always 0. Maintain the customer service volume%, and use a pH controller to add ammonia to 12%.
The pH value is automatically maintained at 6.81 by adding volume % solution. After reaching the cell concentration of a dry cell mass of 14 evenings already in the second period, oxygen-enriched air with an oxygen content of 4% by volume is introduced while keeping the air flow constant.

60時間后に15oCに冷却させ、1000庇の連続遠
心分離機で生成細胞集塊を分離し乾燥させる。
After 60 hours, it is cooled to 15oC, and the resulting cell clumps are separated and dried in a 1000 eaves continuous centrifuge.

この作業条件では細胞収量はメタノール1夕あたり乾燥
細胞集塊o.44夕で、組成は乾燥細胞集塊に対して粗
蛋白76%、核酸6.5%、灰分5%及び脂肪4.5%
である。実施例 3実施例第2と同様に“lnにnso
r”を装備した80そ生物反応器で実施例第1記載の組
成の養分塩溶液50そに予め15時間35℃で培養した
Methylomo岬ssp.DSM580の培養10
00柵を接種し、35oo、空気流量0.受容積/容積
/分及び回転数1200回/分において静的条件で恒常
のpH値7.0で培養する。
Under these operating conditions, the cell yield is approximately 0.000 dry cell clumps per night of methanol. The composition was 76% crude protein, 6.5% nucleic acid, 5% ash, and 4.5% fat based on the dry cell mass.
It is. Example 3 Same as Example 2, “ln to nso”
Cultivation of Cape Methylomo ssp.
00 fence inoculated, 35oo, air flow rate 0. Cultivation is carried out in static conditions at a constant pH value of 7.0 at a receiving volume/volume/min and a rotational speed of 1200 revolutions/min.

連続培養は1潮時間に流過量0.05で開始し、さらに
48時間后に流過量を0.1に上げ、次に段階的に12
0時間以内に0.35まで上げる。これらの条件の下で
、細胞収量係数0.46(乾燥細胞集塊夕/メタノール
夕)及び生産性10.8夕/そ/hの平衡状態が維持さ
れる。発生する培養炉液は平衡状態到達后は5咳容積%
の量を反応器に戻し対応して養分溶液の送入を減少する
。細胞の組成は乾燥細胞集塊に対して粗蛋白72%、核
酸4.5%、灰分3.5%及び脂肪5.5%である。
Continuous culture was started at a flow rate of 0.05 at 1 tidal hour, and after another 48 hours the flow rate was increased to 0.1, then stepwise to 12
Increase to 0.35 within 0 hours. Under these conditions, an equilibrium is maintained with a cell yield coefficient of 0.46 (dry cell agglomerate/methanol) and a productivity of 10.8/h/h. The culture solution generated is 5% by volume after reaching an equilibrium state.
of the nutrient solution is returned to the reactor and the feed of the nutrient solution is correspondingly reduced. The composition of the cells is 72% crude protein, 4.5% nucleic acid, 3.5% ash and 5.5% fat based on the dry cell mass.

Claims (1)

【特許請求の範囲】 1 メタノールを基質とする単細胞蛋白質を得る方法に
おいて、機械的撹拌装置を備えた又は備えていないガス
送入反応器内に、不可欠的にメタノールを利用する細菌
Methylomonas sp.DSM580の成長
性液下培養を作り出し、その内には唯一の炭素−及びエ
ネルギー源としてのメタノール・無機養分及び場合によ
り発育素がありそのほかこの系には空気又は酸素冨化し
た空気を反応温度20−45℃で送入した后に、生成し
た三相系から細胞集塊を分離し乾燥させ、その際粗蛋白
分少なくとも60−76重量%、核酸分2−17重量%
、灰分3−6重量%、脂肪分3−8重量%(乾燥細胞集
塊に対して)の細胞集塊が得られ、これから分離された
液相は場合によっては全部又は一部は反応過程に再循環
させることを特徴とする方法。 2 Methylomonas sp.DSM580は
回分式作業の場合メタノールの初期濃度0.5−50容
積%とくに2−3容積%で得られることを特徴とするク
レーム第1記載の方法。 3 Methylomonas sp.DSM580は
回分式作業の場合制御して恒常の0.01−2.0容積
%のメタノール濃度を維持するとき、メタノール25重
量%の全転化率まで培養されることを特徴とするクレー
ム第1記載の方法。 4 Methylomonas sp.DSM580は
連続作業の場合通過量0.1−0.5容積/容積/時間
で化学的又は混濁的に静的な条件下で得られることを特
徴とするクレーム第1記載の方法。 5 成長中はアルカリないし酸の添加により4.5−9
.0の実質上恒常なpH値に調整することを特徴とする
クレーム第1ないし第4記載の方法。 6 Methylomonas sp.DSM580の
培養は20ないし45℃の温度において実施することを
特徴とするクレーム第1ないし第5記載の方法。 7 培養中には反応器に空気又は酸素冨化した空気を空
気流量0.5−1.5容積/容積/分で送入し、導入さ
れる混合ガスの酸素含有量は20−60容積%であるこ
とを特徴とするクレーム第1ないし第6記載の方法。 8 培養中には反応器に空気又は酸素冨化した空気を空
気流量0.1−0.2容積/容積/分で送入し、導入さ
れる混合ガスの酸素含有量は20−60容積%であるこ
とを特徴とするクレーム第1ないし第7記載の方法。 9 養分水溶液は窒素源としてアンモニウム塩及び/又
は硝酸塩及び/又は尿素をならびに成長に必要なカチオ
ン、ナトリウム、カリウム、マグネシウム、カルシウム
、鉄、亜鉛、マンガン及びアニオン、燐酸塩、硫酸塩、
硝酸塩、塩化物及び発育素を含んでいることを特徴とす
るクレーム第1ないし第8記載の方法。
[Claims] 1. In a method for obtaining single-cell proteins using methanol as a substrate, the bacterium Methylomonas sp., which indispensably utilizes methanol, is present in a gas feed reactor with or without a mechanical stirring device. A vegetative submerged culture of DSM580 was created in which the only carbon and energy sources were methanol, inorganic nutrients and optionally growth factors, and in addition to the system, air or oxygen-enriched air was added at a reaction temperature of 20°C. After delivery at -45°C, the cell clumps are separated from the resulting three-phase system and dried, with a crude protein content of at least 60-76% by weight and a nucleic acid content of 2-17% by weight.
, a cell agglomerate with an ash content of 3-6% by weight and a fat content of 3-8% by weight (based on the dry cell agglomerate) is obtained, from which the liquid phase is separated, in whole or in part, as the case may be, during the reaction process. A method characterized by recycling. 2 Methylomonas sp. Process according to claim 1, characterized in that DSM 580 is obtained in a batchwise operation with an initial concentration of methanol of 0.5-50% by volume, in particular 2-3% by volume. 3 Methylomonas sp. Claim 1, characterized in that DSM580 is cultivated to a total conversion of 25% by weight of methanol when controlled in a batch operation to maintain a constant methanol concentration of 0.01-2.0% by volume. the method of. 4 Methylomonas sp. Process according to claim 1, characterized in that the DSM 580 is obtained under chemically or turbidly static conditions with a throughput of 0.1-0.5 vol/vol/h in continuous operation. 5.4.5-9 by adding alkali or acid during growth.
.. 5. A method according to claims 1 to 4, characterized in that the pH value is adjusted to a substantially constant pH value of 0. 6 Methylomonas sp. 6. The method according to claims 1 to 5, wherein the cultivation of DSM580 is carried out at a temperature of 20 to 45°C. 7 During cultivation, air or oxygen-enriched air is introduced into the reactor at an air flow rate of 0.5-1.5 vol/vol/min, and the oxygen content of the introduced gas mixture is 20-60 vol%. The method according to any one of claims 1 to 6, characterized in that: 8 During cultivation, air or oxygen-enriched air is fed into the reactor at an air flow rate of 0.1-0.2 volume/volume/min, and the oxygen content of the introduced gas mixture is 20-60% by volume. The method according to any one of claims 1 to 7, characterized in that: 9. The nutrient aqueous solution contains ammonium salts and/or nitrates and/or urea as nitrogen sources and the cations necessary for growth, sodium, potassium, magnesium, calcium, iron, zinc, manganese and anions, phosphates, sulfates,
The method according to any one of claims 1 to 8, characterized in that the method contains nitrate, chloride, and a growth element.
JP51032675A 1976-03-26 1976-03-26 Methanol-based single cell protein production method Expired JPS608114B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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JPS52117482A JPS52117482A (en) 1977-10-01
JPS608114B2 true JPS608114B2 (en) 1985-02-28

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53136580A (en) * 1977-05-02 1978-11-29 Mitsubishi Gas Chem Co Inc Preparation of bacterial cell

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS496192A (en) * 1972-04-26 1974-01-19
JPS5031086A (en) * 1973-07-26 1975-03-27
JPS5052272A (en) * 1973-09-13 1975-05-09
JPS5052271A (en) * 1973-09-13 1975-05-09
JPS5071884A (en) * 1973-11-08 1975-06-14
JPS5071885A (en) * 1973-11-09 1975-06-14
JPS5071888A (en) * 1973-11-09 1975-06-14
JPS5071886A (en) * 1973-11-09 1975-06-14
JPS50154480A (en) * 1974-05-31 1975-12-12
JPS5119184A (en) * 1974-08-09 1976-02-16 Mitsubishi Gas Chemical Co Biseibutsukintaino seizohoho
JPS5122872A (en) * 1974-08-09 1976-02-23 Mitsubishi Gas Chemical Co BISEIBUTSUKINTAINOSEIZOHO
JPS5141491A (en) * 1974-09-30 1976-04-07 Asahi Chemical Ind Kintaino seizohoho
JPS51123881A (en) * 1975-04-18 1976-10-28 Kuraray Co Ltd Process for producing microbial cells
JPS51123882A (en) * 1975-04-23 1976-10-28 Kuraray Co Ltd Process for producing microbial cells
JPS5228988A (en) * 1975-08-29 1977-03-04 Kureha Chem Ind Co Ltd Method for preparing microbial cells
JPS5270079A (en) * 1975-12-05 1977-06-10 Kuraray Co Ltd Manufacture of microbial cells
JPS5294481A (en) * 1976-02-03 1977-08-09 Kuraray Co Ltd Production of microbial cells
JPS5294480A (en) * 1976-01-27 1977-08-09 Kanebo Ltd Production of microbial cells
JPS538794A (en) * 1976-07-12 1978-01-26 Seiichi Kobayashi Plug socket adapter with builttin remote control switch

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS496192A (en) * 1972-04-26 1974-01-19
JPS5031086A (en) * 1973-07-26 1975-03-27
JPS5052272A (en) * 1973-09-13 1975-05-09
JPS5052271A (en) * 1973-09-13 1975-05-09
JPS5071884A (en) * 1973-11-08 1975-06-14
JPS5071885A (en) * 1973-11-09 1975-06-14
JPS5071888A (en) * 1973-11-09 1975-06-14
JPS5071886A (en) * 1973-11-09 1975-06-14
JPS50154480A (en) * 1974-05-31 1975-12-12
JPS5119184A (en) * 1974-08-09 1976-02-16 Mitsubishi Gas Chemical Co Biseibutsukintaino seizohoho
JPS5122872A (en) * 1974-08-09 1976-02-23 Mitsubishi Gas Chemical Co BISEIBUTSUKINTAINOSEIZOHO
JPS5141491A (en) * 1974-09-30 1976-04-07 Asahi Chemical Ind Kintaino seizohoho
JPS51123881A (en) * 1975-04-18 1976-10-28 Kuraray Co Ltd Process for producing microbial cells
JPS51123882A (en) * 1975-04-23 1976-10-28 Kuraray Co Ltd Process for producing microbial cells
JPS5228988A (en) * 1975-08-29 1977-03-04 Kureha Chem Ind Co Ltd Method for preparing microbial cells
JPS5270079A (en) * 1975-12-05 1977-06-10 Kuraray Co Ltd Manufacture of microbial cells
JPS5294480A (en) * 1976-01-27 1977-08-09 Kanebo Ltd Production of microbial cells
JPS5294481A (en) * 1976-02-03 1977-08-09 Kuraray Co Ltd Production of microbial cells
JPS538794A (en) * 1976-07-12 1978-01-26 Seiichi Kobayashi Plug socket adapter with builttin remote control switch

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