JPH044867B2 - - Google Patents
Info
- Publication number
- JPH044867B2 JPH044867B2 JP61080985A JP8098586A JPH044867B2 JP H044867 B2 JPH044867 B2 JP H044867B2 JP 61080985 A JP61080985 A JP 61080985A JP 8098586 A JP8098586 A JP 8098586A JP H044867 B2 JPH044867 B2 JP H044867B2
- Authority
- JP
- Japan
- Prior art keywords
- yeast
- treatment step
- wastewater
- liquid
- screen
- 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 - Lifetime
Links
- 240000004808 Saccharomyces cerevisiae Species 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 29
- 239000002351 wastewater Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 230000029087 digestion Effects 0.000 claims description 15
- 238000005063 solubilization Methods 0.000 claims description 15
- 230000007928 solubilization Effects 0.000 claims description 15
- 230000001580 bacterial effect Effects 0.000 claims description 12
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 11
- 239000003337 fertilizer Substances 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- 238000012258 culturing Methods 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 230000001954 sterilising effect Effects 0.000 claims description 4
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 230000018044 dehydration Effects 0.000 claims 1
- 238000006297 dehydration reaction Methods 0.000 claims 1
- 235000011837 pasties Nutrition 0.000 claims 1
- 230000000644 propagated effect Effects 0.000 claims 1
- 229940041514 candida albicans extract Drugs 0.000 description 5
- 238000000855 fermentation Methods 0.000 description 5
- 230000004151 fermentation Effects 0.000 description 5
- 239000002609 medium Substances 0.000 description 5
- 239000012138 yeast extract Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 238000005273 aeration Methods 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 241000221198 Basidiomycota Species 0.000 description 2
- 241000235648 Pichia Species 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006481 glucose medium Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000011782 vitamin Substances 0.000 description 2
- 229940088594 vitamin Drugs 0.000 description 2
- 229930003231 vitamin Natural products 0.000 description 2
- 235000013343 vitamin Nutrition 0.000 description 2
- 241001030162 Debaryomyces sp. Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 240000000599 Lentinula edodes Species 0.000 description 1
- 235000014528 Pholiota nameko Nutrition 0.000 description 1
- 244000168667 Pholiota nameko Species 0.000 description 1
- 240000001462 Pleurotus ostreatus Species 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 241000006364 Torula Species 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 150000003722 vitamin derivatives Chemical class 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Fertilizers (AREA)
- Fodder In General (AREA)
Description
〔産業上の利用分野〕
本発明は、各種飼料や肥料を製造するための廃
水による酵母の培養方法に関するものである。
〔従来の技術〕
飼料や肥料の製造方法に関する公知技術とし
て、例えば特公昭60−29678号公報に見られるよ
うに、家畜糞類を可溶化消化して有機酸を生成し
た後、酵母を培養して、飼料や肥料を製造する方
法がある。
〔発明が解決しようとする問題点〕
しかしながら、この公知技術によつて製造され
る飼料や肥料は、不活性SSの混入が多いために、
蛋白質の含有率が低く、商品的価値が低かつた。
本発明は、菌体の回収量が多く、かつ不活性
SSの混入が少ない、廃水による酵母の培養方法
を提供しようとするものである。
〔問題点を解決するための手段〕
本発明は、廃水を所定期間（例えば１〜２日
間）嫌気状態に保持して可溶化消化する。その
後、その処理液をスクリーンで濾過してし渣を除
去する。そして、その濾液を酵母処理することに
よつて酵母を回収するようにした廃水による酵母
の培養方法である。
〔作 用〕
本発明は、廃水を可溶化消化した後に、スクリ
ーンによつてし渣を除去し、その処理液（濾液）
で酵母を培養する方法であり、可溶化消化処理に
よつて菌体の回収量が多く、かつスクリーン処理
によつて不活性SSの混入が少なくなる。
〔実施例〕
以下に、本発明の廃水による酵母の培養方法の
工程順を第１図によつて説明する。
先ず、廃水としては、糖質を多く含む食品工場
廃水１を用いる。
次に、上記廃水１を可溶化消化工程２へ導入す
る。
この可溶化消化工程２では、上記廃水１を可溶
化消化槽内で、例えば30℃前後で約24〜48時間程
度嫌気状態に保持する。これにより上記廃水１は
一次的な嫌気分解を受け、有機酸が生成される。
また、固形状の炭水化物等の分解も起こり、液化
される。このため、BODが上昇し、SSは減少す
る。
次に、上記可溶化消化処理が終つた処理液をス
クリーン処理工程３へ導入する。
このスクリーン処理工程３では、例えば目幅が
約0.3mm程度の微細スクリーンによつて上記処理
液が濾過され、未分解の繊維分やその他無機物の
SS等が分解される。そして、スクリーンかすは、
処理水によつて洗浄された後、スクリユープレス
によつて脱水されて、し渣が除去される。なお、
脱水し渣は、焼却しても良いが、濃縮菌体と混合
して、肥料等に利用してもよい。また、洗浄排水
やスクリユープレス分離液は酵母処理工程へ導入
すると良い。
次に、上記スクリーン処理された濾液を酵母処
理工程４へ導入する。
この酵母処理工程４では、上記濾液を、空気導
入により微好気性に保たれた反応槽内に導入して
発酵させる。
この際、上記濾液のPHが3.0〜8.5の範囲であれ
ばそのまま発酵させる。なお、BOD負荷は3.0
Kg／Kg−SS・日以下とし、発酵温度は約15〜25
℃に調整する。そして、運転当初は、
Saccharcmyces属、Debaryomyces属、
Hansenula属、Torula属、Pichia属等の酵母を
接種するが、その後は返送による。
次に、上記酵母処理が終つた処理液を遠心分離
工程５へ導入する。
この遠心分離工程４では、上記処理液が遠心分
離機内に導入されて、濃縮菌体と上澄液とに分離
される。
この際、酵母は粒径が数10μ程度の比較的均一
なものなので、遠心分離機によつて効果的に分離
される。そして、分離された濃縮菌体６は含水率
が約80〜90％程度の糊状を呈する。
なお、遠心分離機としては、第２図に示すよう
な、竪形の遠心分離機１１が適している。この竪
形の遠心分離機１１は、上記処理液を処理液流入
口１２から処理液流入管１３を通して回転ボール
１４内の底部に流入し、回転ボール１４に設けた
分離板１６によつて濃縮液Ａと分離液Ｂとに分離
し、濃縮液Ａと分離液Ｂとを回転ボール１４の上
端の濃縮液流出口１７及び分離液流出口１８から
流出させるようにしたものである。
なお、上記遠心分離工程で得られた濃縮汚泥
は、そのまま液肥等として利用する。濃縮菌体６
は蛋白質含有率が60％（40〜70％）程度と高く、
ビタミン質も0.04％（0.03〜0.05％）含有してい
るため、市販の酵母エキスとほぼ同等の価値があ
り、肥料や飼料として利用される。
例えば余剰酵母は、キノコ類栽培のための培地
に利用すると非常に効果がある。
余剰酵母（汚泥）に約10培量の水を加え、２〜
３時間煮沸し、濾過または静置により上澄液を得
る。この上澄液を酵母エキスとして培地に添加す
る。この添加量は蛋白質として培地に対して0.1
〜0.4％程度とする。また、廃水の成分によつて
は、余剰酵母を酵母処理工程から直接採取して、
煮沸しても良い。
対象のキノコ類としては、人工栽培可能なエノ
キダケ、シメジ、マエタケ、ナメコ、シイタメ、
マツシユルーム等が良い。
キノコ類は坦子菌類（真菌類）に属するので、
増殖には培地が必要である。坦子菌類の増殖に
は、酵母エキス・ブドウ糖培地，エビオス・ブド
ウ糖培地，エビオス庶糖培地のように、酵母エキ
スやエビオス（酵母粉末）を使用している。しか
し、これらエキスは非常に高価なため、商業用の
キノコ類栽培には使用できず、一般的には、こぬ
か等を代りに使用している。
しかし、本発明によれば、安価な酵母エキスが
得られるため、これを培地に使用し、高品質なキ
ノコ類を高収率で得られる。
一方、上記遠心分離工程で得られた分離液は、
接触酸化処理工程７に導入する。
この接触酸化処理工程７では、上記分離液が接
触酸化処理槽によつて好気性生物処理される。こ
こでは、ばつ気は間欠的に行われ、接触酸化処理
槽内は嫌気、好気を繰り返すので、脱窒処理も行
われる。
また、接触酸化処理槽内には通常の場合と同様
に、波板等の接触ろ材が充填され、ばつ気により
槽内に循環流が生起される。なお、嫌気工程はば
つ気を停止しても、他の撹拌装置で撹拌を行つて
も、或いはばつ気の空気量を減らしても良い。ま
た、接触酸化処理にかえて、通常の活性汚泥処理
を採用してもよい。
最後に、上記接触酸化処理が終つた処理液を、
沈殿処理後、滅菌処理工程８へ導入する。
この滅菌処理工程８では、上記処理液を塩素消
毒槽内に導入して、注入される塩素によつて消毒
する。
なお、処理液の残留塩素が１mg／以上となる
ように、通常約15mg−ｃ／程度の塩素を注入
する。
そして、上記滅菌処理が終つた滅菌処理液９の
一部は、前記酵母処理工程４へ返送される。酵母
は細菌に比べて塩素等酸化剤に対する耐性が強い
ので、上記返送により発酵時の一般細菌の増殖が
抑えられる。
なお、次表は、本発明の実施例を示したもので
あり、廃水処理量1.000m3／日から、濃縮菌体450
Kg−乾物／日（含水率80〜90％）が得られた。
また、蛋白質含有率60％（40〜70％）、ビタミ
ン質含有率0.04％であつた。
[Industrial Application Field] The present invention relates to a method for culturing yeast using wastewater for producing various feeds and fertilizers. [Prior art] As a known technology related to the production method of feed and fertilizer, for example, as seen in Japanese Patent Publication No. 60-29678, livestock manure is solubilized and digested to produce organic acids, and then yeast is cultured. There are methods to produce feed and fertilizer. [Problems to be solved by the invention] However, feeds and fertilizers produced by this known technology are often contaminated with inert SS.
The protein content was low and the commercial value was low. The present invention provides a large amount of bacterial cells to be recovered and inactive cells.
The purpose of this invention is to provide a method for culturing yeast using wastewater that is less contaminated with SS. [Means for Solving the Problems] According to the present invention, wastewater is maintained in an anaerobic state for a predetermined period (for example, 1 to 2 days) and solubilized and digested. Thereafter, the treated liquid is filtered through a screen to remove residue. This is a method for culturing yeast using wastewater, in which yeast is recovered by treating the filtrate with yeast. [Function] In the present invention, after solubilizing and digesting wastewater, the residue is removed using a screen, and the treated liquid (filtrate) is
This is a method of culturing yeast using solubilization and digestion, and the solubilization and digestion treatment yields a large amount of bacterial cells, while the screening treatment reduces contamination with inactive SS. [Example] Below, the process order of the method for culturing yeast using wastewater of the present invention will be explained with reference to FIG. First, food factory wastewater 1 containing a large amount of carbohydrates is used as wastewater. Next, the wastewater 1 is introduced into a solubilization and digestion step 2. In this solubilization and digestion step 2, the wastewater 1 is maintained in an anaerobic state in a solubilization and digestion tank at, for example, about 30° C. for about 24 to 48 hours. As a result, the wastewater 1 undergoes primary anaerobic decomposition and organic acids are produced.
In addition, solid carbohydrates and the like are decomposed and liquefied. Therefore, BOD increases and SS decreases. Next, the treatment liquid that has undergone the solubilization and digestion treatment is introduced into the screen treatment step 3. In this screen treatment step 3, the treatment liquid is filtered through a fine screen with a mesh width of about 0.3 mm, and undecomposed fibers and other inorganic substances are removed.
SS etc. are disassembled. And the screen scum is
After being washed with treated water, it is dehydrated using a screw press to remove scum. In addition,
The dehydrated residue may be incinerated, or may be mixed with concentrated bacterial cells and used as fertilizer. In addition, it is recommended that the washing waste water and the screw press separation liquid be introduced into the yeast treatment process. Next, the screened filtrate is introduced into yeast treatment step 4. In this yeast treatment step 4, the filtrate is introduced into a reaction tank kept microaerobic by introducing air and fermented. At this time, if the pH of the filtrate is in the range of 3.0 to 8.5, it is fermented as is. In addition, the BOD load is 3.0
Kg/Kg-SS・day or less, and the fermentation temperature is approximately 15-25
Adjust to ℃. And at the beginning of operation,
Saccharcmyces sp., Debaryomyces sp.
Yeast such as Hansenula, Torula, and Pichia are inoculated, but after that, they are sent back. Next, the treated liquid after the above-mentioned yeast treatment is introduced into the centrifugation step 5. In this centrifugation step 4, the treated liquid is introduced into a centrifuge and separated into concentrated bacterial cells and a supernatant. At this time, yeast is a relatively uniform particle size of about several tens of microns, so it can be effectively separated using a centrifuge. The separated concentrated bacterial cells 6 have a paste-like appearance with a water content of about 80 to 90%. Note that a vertical centrifuge 11 as shown in FIG. 2 is suitable as the centrifuge. This vertical centrifugal separator 11 allows the processing liquid to flow from a processing liquid inlet 12 through a processing liquid inflow pipe 13 to the bottom of a rotating ball 14, and is separated into a concentrated liquid by a separating plate 16 provided on the rotating ball 14. The concentrated liquid A and the separated liquid B are separated, and the concentrated liquid A and the separated liquid B are made to flow out from the concentrated liquid outlet 17 and the separated liquid outlet 18 at the upper end of the rotating ball 14. Note that the concentrated sludge obtained in the above centrifugation step is used as it is as liquid fertilizer or the like. Concentrated bacterial cells 6
has a high protein content of about 60% (40-70%),
It also contains 0.04% (0.03-0.05%) of vitamins, so it has almost the same value as commercially available yeast extract, and is used as fertilizer and feed. For example, surplus yeast can be very effective when used as a medium for growing mushrooms. Add about 10 volumes of water to excess yeast (sludge), and
Boil for 3 hours and obtain a supernatant by filtration or standing. This supernatant liquid is added to the medium as yeast extract. This addition amount is 0.1% as protein to the medium.
~0.4%. Additionally, depending on the components of the wastewater, excess yeast may be collected directly from the yeast treatment process.
You can also boil it. Target mushrooms include enoki mushrooms, shimeji mushrooms, maetake mushrooms, nameko mushrooms, shiitake mushrooms, and mushrooms that can be grown artificially.
Matsushi room etc. are good. Mushrooms belong to the basidiomycetes (fungi), so
A medium is required for growth. For propagation of basidiomycetes, yeast extract and Ebios (yeast powder) are used, such as yeast extract/glucose medium, Ebios/glucose medium, and Ebios sucrose medium. However, these extracts are very expensive and cannot be used for commercial mushroom cultivation, and konuka or the like is generally used instead. However, according to the present invention, since an inexpensive yeast extract can be obtained, this can be used in a culture medium to obtain high-quality mushrooms at a high yield. On the other hand, the separated liquid obtained in the above centrifugation step is
Introduced to catalytic oxidation treatment step 7. In this contact oxidation treatment step 7, the separated liquid is subjected to aerobic biological treatment in a contact oxidation treatment tank. Here, aeration is performed intermittently and the inside of the contact oxidation treatment tank repeats anaerobic and aerobic conditions, so that denitrification treatment is also performed. Further, the contact oxidation treatment tank is filled with a contact filter material such as a corrugated plate, as in the usual case, and a circulating flow is generated in the tank by aeration. In the anaerobic process, aeration may be stopped, agitation may be performed using another stirring device, or the amount of aeration air may be reduced. Further, instead of the catalytic oxidation treatment, a normal activated sludge treatment may be employed. Finally, the treatment liquid after the above catalytic oxidation treatment is
After the precipitation treatment, it is introduced into sterilization treatment step 8. In this sterilization treatment step 8, the treatment liquid is introduced into a chlorination tank and sterilized by the injected chlorine. Note that approximately 15 mg-c/chlorine is usually injected so that the residual chlorine in the treatment solution is 1 mg/cm or more. A part of the sterilized liquid 9 that has been sterilized is returned to the yeast treatment step 4. Since yeast is more resistant to oxidizing agents such as chlorine than bacteria, the above-mentioned return suppresses the growth of general bacteria during fermentation. The following table shows examples of the present invention, and from a wastewater treatment amount of 1.000 m 3 /day, a concentration of 450
Kg-dry matter/day (moisture content 80-90%) was obtained. In addition, the protein content was 60% (40-70%) and the vitamin content was 0.04%.
本発明の廃水による酵母の培養方法によれば、
廃水中の固形有機物の多くは可溶化消化処理によ
つて液化されるために、菌体の回収量が多くな
る。しかも、可溶化消化によつても液化できなか
つた固形物は、スクリーン処理によつて除去され
るために、酵母処理によつて得られる菌体の純度
が高くなり、蛋白質の含有率が高く、飼料、肥料
として商品価値が高い。
本発明の特徴と利点をさらに詳説すれば、本発
明は、廃水の酸性発酵を目的とした一次的な嫌気
分解を行なう可溶化消化工程を備えており、この
工程は、流入水中に混入する物質をメタン化せ
ず、可能な限り溶解性物質に変化させ、以後の工
程で酵母が資化する量を増加させる効果を有す
る。この可溶化消化工程では、流入水中の溶解性
基質が酸性発酵するけれども、メタン発酵はせ
ず、したがつて酵母が資化し易い基質が増加し、
以後の工程での酵母の回収率を増加させることに
なる。また、本発明は、この可溶化消化工程の次
にスクリーン処理工程を備えているので、可溶化
し得なかつた夾雑物および残渣が除去され、以後
の工程において、純度の高い酵母汚泥を得ること
ができる。また、本発明の次の酵母処理工程で
は、好気性処理を行なうので、溶解性物質はメタ
ンにならず、増殖する酵母の量を増やすことがで
きる。したがつて、本発明によると、酵母の回収
率が高く、余剰酵母中の酵母含有率も高く、高蛋
白になる酵母の培養方法を得ることができる。
According to the method for culturing yeast using wastewater of the present invention,
Since most of the solid organic matter in wastewater is liquefied by solubilization and digestion, a large amount of bacterial cells can be recovered. Furthermore, solid matter that could not be liquefied by solubilization digestion is removed by screen treatment, so the purity of the bacterial cells obtained by yeast treatment is high, and the protein content is high. It has high commercial value as feed and fertilizer. To further elaborate on the features and advantages of the present invention, the present invention comprises a solubilization digestion step for primary anaerobic decomposition for the purpose of acidic fermentation of wastewater, and this step comprises It has the effect of changing the substance into a soluble substance as much as possible without methanizing it, and increasing the amount assimilated by yeast in subsequent steps. In this solubilization digestion step, soluble substrates in the influent undergo acidic fermentation, but do not undergo methane fermentation, thus increasing the amount of substrates that are easily assimilated by yeast.
This will increase the recovery rate of yeast in subsequent steps. Furthermore, since the present invention includes a screen treatment step after the solubilization and digestion step, impurities and residues that could not be solubilized are removed, and yeast sludge with high purity can be obtained in the subsequent steps. I can do it. Further, in the next yeast treatment step of the present invention, aerobic treatment is performed, so that soluble substances do not become methane, and the amount of yeast that grows can be increased. Therefore, according to the present invention, it is possible to obtain a method for culturing yeast that has a high yeast recovery rate, a high yeast content in surplus yeast, and a high protein content.
第１図は本発明の工程順を説明するブロツク
図、第２図は遠心分離機の一例を示した概略図で
ある。
１……廃水、２……可溶化消化処理工程、３…
…スクリーン処理工程、４……酵母処理工程、６
……濃縮菌体。
FIG. 1 is a block diagram explaining the process order of the present invention, and FIG. 2 is a schematic diagram showing an example of a centrifugal separator. 1...Wastewater, 2...Solubilization and digestion process, 3...
... Screen treatment step, 4 ... Yeast treatment step, 6
...Concentrated bacterial cells.
Claims (1)
水を所定温度で所定時間嫌気状態に保持すること
により、その廃水の一次的な嫌気分解を行ない、
有機酸を生成させるとともに、固形状の有機物を
分解させて液化し、これによりBODを上昇させ、
かつSSを減少させる可溶化消化工程と、この可
溶化消化工程を経た処理液を微細スクリーンで濾
過し、未分解の繊維分やその他の無機物のSS等
をし渣として分離し、これらのし渣を除去するス
クリーン処理工程と、このスクリーン処理工程を
経た瀘液を酵母反応槽内に導入し、この酵母反応
槽内で、前記濾液に微好気性の酵母を添加すると
ともに、空気を導入して酸化させ、これにより前
記添加酵母を増殖させる酵母処理工程と、この酵
母処理工程を経た処理液を遠心分離機内に導入し
て遠心分離することにより、その処理液を、多量
の酵母を含む糊質の濃縮汚泥状の濃縮菌体と、上
澄液とに分ける遠心分離工程とを具備し、前記濃
縮菌体は酵母汚泥として、飼料、肥料、またはキ
ノコ類栽培用培地への添加物等として利用され、
一方、前記上澄液は、接触酸化処理もしくは活性
汚泥処理工程と、滅菌処理工程とを経て滅菌処理
液に変換されることを特徴とする廃水による酵母
の培養方法。 ２ 前記スクリーン処理工程において除去された
し渣は、前記濃縮菌体に混合されて、肥料等に利
用され、あるいは焼却処分されることを特徴とす
る特許請求の範囲第１項記載の方法。 ３ 前記滅菌処理液の一部が、前記酵母処理工程
へ返送されて、前記酵母の酸化時の一般細菌の増
殖を抑制することを特徴とする特許請求の範囲第
１項または第２項記載の方法。 ４ 前記スクリーン処理工程において、前記し渣
は、洗浄用処理水によつて洗浄された後、スクリ
ユープレスによる脱水によつて除去され、前記洗
浄用処理水の洗浄後の排水、および前記スクリユ
ープレスによる分離液が、前記酵母処理工程へ導
入されることを特徴とする特許請求の範囲第１項
〜第３項いずれか１項記載の方法。[Claims] 1. Introducing wastewater into a solubilization digestion tank and maintaining the wastewater in an anaerobic state at a predetermined temperature for a predetermined period of time to perform primary anaerobic decomposition of the wastewater,
In addition to producing organic acids, solid organic substances are decomposed and liquefied, thereby increasing BOD.
A solubilization and digestion step is also carried out to reduce SS, and the treated solution that has undergone this solubilization and digestion step is filtered through a fine screen to separate undecomposed fibers and other inorganic SS as residue. The filtrate that has passed through this screen treatment step is introduced into a yeast reaction tank, and in this yeast reaction tank, microaerobic yeast is added to the filtrate and air is introduced. A yeast treatment step in which the added yeast is oxidized and thereby the added yeast is propagated; and the treated solution that has undergone this yeast treatment step is introduced into a centrifuge and centrifuged, thereby turning the treated solution into a pasty substance containing a large amount of yeast. The method includes a centrifugation step that separates concentrated bacterial cells in the form of concentrated sludge and a supernatant liquid, and the concentrated bacterial cells are used as yeast sludge as feed, fertilizer, or as an additive to a mushroom cultivation medium. is,
On the other hand, a method for culturing yeast using wastewater, characterized in that the supernatant liquid is converted into a sterilized liquid through a contact oxidation treatment or activated sludge treatment step and a sterilization treatment step. 2. The method according to claim 1, wherein the residue removed in the screen treatment step is mixed with the concentrated bacterial cells and used as fertilizer or the like, or incinerated. 3. The method according to claim 1 or 2, wherein a part of the sterilization liquid is returned to the yeast treatment step to suppress the growth of common bacteria during oxidation of the yeast. Method. 4 In the screen treatment step, the scum is washed with the treated water for washing and then removed by dehydration using a screw press, and the waste water after washing of the treated water for washing and the screen sludge are removed. 4. The method according to any one of claims 1 to 3, wherein a liquid separated by pressing is introduced into the yeast treatment step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61080985A JPS62239983A (en) | 1986-04-10 | 1986-04-10 | Cultivation of yeast with waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61080985A JPS62239983A (en) | 1986-04-10 | 1986-04-10 | Cultivation of yeast with waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62239983A JPS62239983A (en) | 1987-10-20 |
| JPH044867B2 true JPH044867B2 (en) | 1992-01-29 |
Family
ID=13733791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61080985A Granted JPS62239983A (en) | 1986-04-10 | 1986-04-10 | Cultivation of yeast with waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62239983A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01293194A (en) * | 1988-05-18 | 1989-11-27 | Yuukishitsu Hiryo Seibutsu Katsusei Riyou Gijutsu Kenkyu Kumiai | High load treatment of carbohydrate waste water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57152887A (en) * | 1981-03-18 | 1982-09-21 | Nitto Electric Ind Co Ltd | Treatment of liquid |
| JPS59115795A (en) * | 1982-12-24 | 1984-07-04 | Sanyo Kokusaku Pulp Co Ltd | Treatment of waste liquid of pulp digester |
| JPS6029678A (en) * | 1983-07-28 | 1985-02-15 | Fujitsu Ltd | Gate injecting current measuring device of mosfet |
-
1986
- 1986-04-10 JP JP61080985A patent/JPS62239983A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57152887A (en) * | 1981-03-18 | 1982-09-21 | Nitto Electric Ind Co Ltd | Treatment of liquid |
| JPS59115795A (en) * | 1982-12-24 | 1984-07-04 | Sanyo Kokusaku Pulp Co Ltd | Treatment of waste liquid of pulp digester |
| JPS6029678A (en) * | 1983-07-28 | 1985-02-15 | Fujitsu Ltd | Gate injecting current measuring device of mosfet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62239983A (en) | 1987-10-20 |
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