JP2001017989A - Anaerobic treatment of oil and fat-containing waste water or oil and fat-containing sludge - Google Patents
Anaerobic treatment of oil and fat-containing waste water or oil and fat-containing sludgeInfo
- Publication number
- JP2001017989A JP2001017989A JP19324399A JP19324399A JP2001017989A JP 2001017989 A JP2001017989 A JP 2001017989A JP 19324399 A JP19324399 A JP 19324399A JP 19324399 A JP19324399 A JP 19324399A JP 2001017989 A JP2001017989 A JP 2001017989A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- fat
- sludge
- enzyme
- treatment
- 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.)
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Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、油脂含有排水ある
いは油脂含有汚泥の嫌気性処理方法に関し、特に油脂含
有排水あるいは油脂含有汚泥を高率で浄化することがで
きる嫌気性処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anaerobic treatment method for oil-containing wastewater or oil-containing sludge, and more particularly to an anaerobic treatment method capable of purifying oil-containing wastewater or oil-containing sludge at a high rate.
【０００２】[0002]
【従来の技術】有機性汚濁物質を含む排水の処理には、
従来から活性汚泥法が多く用いられている。この方法
は、好気性の微生物により排水中の有機物を分解、除去
するものであるが、必要な酸素を供給するための曝気エ
ネルギーが必要であり、発生した余剰汚泥の処分も大き
な問題になってきている。また、余剰汚泥を含む有機性
の固形廃棄物の処理法の一つに、コンポスト化がある
が、都市部ではコンポストの利用先の確保が課題となる
場合が多い。これに対し、濃厚な有機性排水や有機性汚
泥の処理には、従来から嫌気性消化方式が多用されてい
る。この方式は処理費用が廉価でかつエネルギーとして
有用なメタンを回収できる利点がある。2. Description of the Related Art In the treatment of wastewater containing organic pollutants,
Conventionally, the activated sludge method is often used. Although this method decomposes and removes organic matter in wastewater by aerobic microorganisms, it requires aeration energy to supply necessary oxygen, and disposal of excess sludge generated is also a major problem. ing. In addition, composting is one of the methods for treating organic solid waste including excess sludge. In urban areas, however, it is often an issue to secure compost use destinations. On the other hand, an anaerobic digestion method has been frequently used in the treatment of concentrated organic wastewater and organic sludge. This method has an advantage that the processing cost is low and methane useful as energy can be recovered.
【０００３】油脂は好気的処理、嫌気的処理のいずれに
おいても比較的難分解性であり、処理槽内で浮上してス
カムが形成する原因となっている。このため、濃厚な油
脂を含有する畜肉加工、水産加工排水の処理施設では、
前処理装置として浮上分離装置を配備して、油脂分を分
離したのちに活性汚泥法などの生物処理を行っている。Oils and fats are relatively hard to decompose in both aerobic and anaerobic treatments, causing them to float in the treatment tank and form scum. For this reason, livestock processing and effluent processing wastewater treatment facilities containing rich fats and oils,
A flotation device is provided as a pretreatment device, and after separating fats and oils, biological treatment such as an activated sludge method is performed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、分離さ
れた油脂は、通常汚物も同時に分離されてくるため取扱
いが容易でなく、現状は焼却処理をせざるを得ない。油
脂含有量の多い汚泥も同様に、焼却以外の有効な処理方
法がない。油脂は大部分が炭素と水素から構成されてい
るため、生物学的な酸化処理では大量の酸素を必要と
し、かつ、分解にも長時間を有する。一方、油脂は前述
のような分子構成により、分解に際して大量のメタンを
発生するため、油脂の嫌気性消化は、エネルギー回収の
観点からは望ましい処理方式といえる。しかしながら、
嫌気性消化においても、油脂の分解には極めて長時間を
要することが問題となっている。However, the separated fats and oils are usually difficult to handle because dirt is also separated at the same time, and at present it has to be incinerated. Similarly, sludge with a high fat content has no effective treatment method other than incineration. Since fats and oils are mostly composed of carbon and hydrogen, biological oxidation requires a large amount of oxygen and has a long time to decompose. On the other hand, since fats and oils generate a large amount of methane when decomposed due to the above-mentioned molecular constitution, anaerobic digestion of fats and oils can be said to be a desirable treatment method from the viewpoint of energy recovery. However,
Even in anaerobic digestion, it takes a long time to decompose fats and oils.
【０００５】微生物による有機物の分解の第一段階とし
て、微生物と基質となる物質との接触が極めて重要であ
る。有機物が溶解、あるいは水中に均一に分散している
場合は特に問題はないが、油脂の中でも動物性脂の多く
は、２０〜３５℃の範囲では固体あるいは半固体状態で
あるため、処理槽壁に付着したり、塊となって浮上した
りするため、微生物の分解を極めて受けにくい。しか
も、動物性脂の構成成分であり、植物性油脂や魚油の主
成分でもある高級脂肪酸は、水に対する溶解度が極めて
低く、処理槽壁に付着したり、塊となって浮上したりす
るため、微生物の分解を受けにくい。さらに、脂肪酸が
電離して脂肪酸イオンとなったとき、カルシウムやマグ
ネシウムなどの多価イオンが存在すると、これと結合
し、金属せっけんを生じるが、この金属せっけんは水に
不溶であるため、微生物による分解はほぼ不可能であ
る。[0005] As a first step in the decomposition of organic matter by microorganisms, contact between the microorganisms and a substance serving as a substrate is extremely important. There is no particular problem when the organic matter is dissolved or evenly dispersed in water. However, since most animal fats among fats and oils are in a solid or semi-solid state in the range of 20 to 35 ° C, the treatment tank wall It is extremely hard to be decomposed by microorganisms because it adheres to the surface or floats as a lump. Moreover, higher fatty acids, which are a component of animal fats and a main component of vegetable fats and oils, have extremely low solubility in water, and adhere to the treatment tank walls or float as a lump, Less susceptible to microbial degradation. In addition, when fatty acids are ionized into fatty acid ions, if polyvalent ions such as calcium and magnesium are present, they are combined with the ions to produce metal soap, which is insoluble in water and is Decomposition is almost impossible.
【０００６】本発明は、このような従来の課題に鑑みて
なされたものであり、油脂を含有する排水または汚泥の
高率の浄化と、エネルギーとして有用なメタン回収効率
を向上する嫌気性処理方法を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has been made in consideration of the above problems, and provides an anaerobic treatment method for purifying wastewater or sludge containing oil and fat at a high rate and improving the efficiency of recovering methane useful as energy. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】本発明者等は、油脂を含
有する排水あるいは汚泥の嫌気性処理について鋭意研究
を行い、上記課題の解決手段として、油脂を含有する排
水あるいは汚泥を先ず高温で酵素処理し、次いでこの酵
素処理液を高温嫌気性処理すれば、油脂の廃棄処理を行
う必要なく、高率の浄化とエネルギーとして有用なメタ
ンの回収効率を向上できることを知見し、本発明を完成
するに至った。The present inventors have conducted intensive studies on the anaerobic treatment of wastewater or sludge containing oils and fats. As a means for solving the above problems, the wastewater or sludge containing fats and oils was first heated at a high temperature. Enzyme treatment and then high-temperature anaerobic treatment of this enzyme-treated solution eliminates the need to dispose of fats and oils, and achieve a high rate of purification and improve the efficiency of recovering methane useful as energy, and completed the present invention. I came to.
【０００８】すなわち、本発明は、次の構成からなるも
のである。 （１）油脂含有排水あるいは油脂含有汚泥を高温で酵素
処理をした後に、該酵素処理液を弱酸性条件下に高温で
嫌気性処理を行うことを特徴とする油脂含有排水あるい
は油脂含有汚泥の処理方法。 （２）前記嫌気性処理をｐＨ５．０〜６．３、温度５０
〜７０℃の条件で行うことを特徴とする前記（１）記載
の油脂含有排水あるいは油脂含有汚泥の処理方法。 （３）前記嫌気性処理をｐＨ５．５〜６．０の条件で行
うことを特徴とする前記（２）記載の油脂含有排水ある
いは油脂含有汚泥の処理方法。That is, the present invention has the following configuration. (1) Treatment of oil-containing wastewater or oil-containing sludge, wherein the enzyme-treated solution is subjected to anaerobic treatment at high temperature under weakly acidic conditions after the oil-containing wastewater or oil-containing sludge is subjected to an enzyme treatment at a high temperature. Method. (2) The anaerobic treatment is performed at pH 5.0 to 6.3 at a temperature of 50.
The method for treating oil- and fat-containing wastewater or oil and fat-containing sludge according to the above (1), which is carried out at a temperature of 70 to 70 ° C. (3) The method for treating oil- and fat-containing wastewater or oil and fat-containing sludge according to (2), wherein the anaerobic treatment is performed under conditions of pH 5.5 to 6.0.
【０００９】[0009]
【発明の実施の形態】通常の生物処理は、一般的な微生
物の活性が最も高いとされる２０〜３５℃の、いわゆる
中温域で行われることが多い。しかし、前述のように、
動物性脂や高級脂肪酸は、中温域では水に不溶または極
めて分散しにくいため、微生物分解を受けにくい。それ
に対し、５０℃以上のいわゆる高温域においては、油脂
の流動性が高まり、水中に分散しやすくなるため、微生
物分解や酵素による分解を受けやすくなる。また、酵素
反応は、通常温度が高いほど反応速度が高くなるため、
高温で酵素反応を行わせることで、油脂の分解性は大幅
に向上される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Ordinary biological treatment is often performed in a so-called medium temperature range of 20 to 35 ° C., which is considered to have the highest activity of general microorganisms. However, as mentioned above,
Animal fats and higher fatty acids are insoluble or extremely difficult to disperse in water in the medium temperature range, and are therefore less susceptible to microbial degradation. On the other hand, in a so-called high-temperature range of 50 ° C. or higher, the fluidity of the fats and oils increases, and the fats and oils are easily dispersed in water, so that the fats and oils are easily decomposed by microorganisms and enzymes. In addition, the enzymatic reaction usually increases the reaction rate as the temperature increases,
By performing the enzymatic reaction at a high temperature, the decomposability of fats and oils is greatly improved.
【００１０】ここで用いられる酵素は、リパーゼに代表
される脂肪分解酵素が挙げられるが、いくつかの種類の
リパーゼを混合して用いても良く、また糖質分解酵素や
蛋白質分解酵素と混合して用いても良い。また、５０℃
以上で反応を行わせるため、これらの酵素は高温条件で
活性を維持できる、あるいは、最適反応温度が高温域に
ある酵素であることが望ましい。リパーゼによる脂肪の
分解で生じた高級脂肪酸は、前述のように電離して脂肪
酸イオンとなったとき、カルシウムやマグネシウムなど
の多価イオンが存在するとこれと結合し、金属せっけん
を生じて不溶化する。金属せっけん生成の反応は式
（ａ）にしたがって不可逆的に進む。 Ｍn+＋ｎＲＣＯＯ- → Ｍ（ＲＣＯＯ）n ↓ （ａ）[0010] The enzymes used here include lipases represented by lipase, but some kinds of lipases may be mixed and used, or they may be mixed with saccharolytic enzymes or proteolytic enzymes. May be used. Also, 50 ° C
In order to carry out the reaction as described above, it is desirable that these enzymes can maintain their activity under high temperature conditions, or that the optimum reaction temperature is in a high temperature range. When the higher fatty acid generated by the decomposition of fat by lipase is ionized into fatty acid ions as described above, if there are polyvalent ions such as calcium and magnesium, they are combined with the polyvalent ions to form metal soap and become insoluble. The reaction of metal soap production proceeds irreversibly according to equation (a). M n + + nRCOO - → M (RCOO) n ↓ (a)
【００１１】ここで、Ｍn+はｎ価金属イオン、ＲＣＯＯ
- は脂肪酸イオン、Ｍ（ＲＣＯＯ） n は金属せっけんを
表す。ｐＨが高くなると脂肪酸は電離しやすくなるた
め、金属せっけんの生成を防止するためには、ｐＨをで
きる限り低く維持することが望ましい。Here, Mn +Is an n-valent metal ion, RCOO
-Is fatty acid ion, M (RCOO) nIs metal soap
Represent. Fatty acids become more easily ionized at higher pH
Therefore, to prevent the formation of metallic soap, adjust the pH
It is desirable to keep it as low as possible.
【００１２】一方、有機性排水あるいは有機性汚泥の嫌
気性処理においては、一般的にメタン発酵の前段に酸発
酵工程が設けられている。これは、比較的分子量の大き
な有機物を嫌気的に分解し、メタン生成菌の基質となる
揮発性有機酸に変換するための工程であるが、この酸発
酵工程はｐＨが低くなると阻害される。これに対し、蛋
白質を含有する有機性排水または有機性汚泥において
は、蛋白質の分解によって生じたアンモニアが、メタン
生成活性に大きく影響することが知られているが、特に
ｐＨが高くなると、遊離体のアンモニアの濃度が高くな
り、メタン生成活性が著しく阻害される。On the other hand, in anaerobic treatment of organic wastewater or organic sludge, an acid fermentation step is generally provided before methane fermentation. This is a step for anaerobically decomposing organic substances having a relatively large molecular weight and converting the organic substances into volatile organic acids serving as substrates for methanogens. However, this acid fermentation step is inhibited when the pH is lowered. On the other hand, in organic wastewater or organic sludge containing protein, it is known that ammonia generated by the decomposition of protein greatly affects methane production activity. , The concentration of ammonia increases, and the methane production activity is significantly inhibited.
【００１３】このように、油脂含有排水あるいは油脂含
有汚泥の処理においては、酸発酵、メタン発酵の活性維
持とともに、金属せっけん生成防止のために、ｐＨ条件
を適性に維持することが極めて重要である。本発明は、
油脂含有排水あるいは油脂含有汚泥を高温で酵素処理を
した後に、該酵素処理液を弱酸性条件下で高温で嫌気性
処理を行うことにより、従来の課題を解決し、油脂含有
排水あるいは油脂含有汚泥の効率的な処理を可能にする
ものである。その上、嫌気性処理をｐＨ５．０〜６．
３、温度５０〜７０℃の条件で行うことにより、さらに
望ましくｐＨ５．５〜６．０、温度５０〜７０℃の条件
で行うことにより、油脂含有排水あるいは油脂含有汚泥
からのメタン回収率を著しく向上することができる。As described above, in the treatment of oil / fat-containing wastewater or oil / fat-containing sludge, it is extremely important to maintain an appropriate pH condition in order to maintain the activity of acid fermentation and methane fermentation and to prevent the generation of metal soap. . The present invention
After subjecting the oil-containing wastewater or oil-containing sludge to enzyme treatment at a high temperature, the enzyme-treated solution is subjected to anaerobic treatment at a high temperature under weakly acidic conditions to solve the conventional problems, and to solve the oil-containing wastewater or oil-containing sludge. This enables efficient processing of. In addition, the anaerobic treatment is carried out at pH 5.0-6.
3. More preferably, the temperature is 50 to 70 ° C., more preferably, the pH is 5.5 to 6.0, and the temperature is 50 to 70 ° C., whereby the methane recovery rate from the oil-containing wastewater or the oil-containing sludge is remarkably increased. Can be improved.
【００１４】次に、本発明の実施態様を、具体的な例で
図面に基づいて説明するが、本発明はこれに限定される
ものではない。図１に本発明の代表的な装置構成例をフ
ローシートとして示す。油脂含有排水あるいは油脂含有
汚泥１は、５０〜７０℃に維持された酵素反応槽２で酵
素液３と混合され、酵素反応を受ける。該酵素処理液４
は酸発酵槽５、嫌気性消化発酵槽７で嫌気性処理され、
有機物の大部分はメタン、二酸化炭素を主成分とするバ
イオガス８へと変換される。この嫌気性処理は、図１に
示すように酸発酵槽（４）、嫌気性消化槽７と２槽に分
けても、１槽で酸発酵とメタン発酵の両反応が行われる
ようにしても良いが、槽内温度は５０〜７０℃であり、
かつ反応液のｐＨは弱酸性条件、望ましくはｐＨ５．０
〜６．３、さらに望ましくはｐＨ５．５〜６．０の範囲
に調整することを特徴とする。嫌気性消化液９は固液分
離を行った後、分離水を活性汚泥法などの好気性処理を
行うことにより、残存する低分子有機物を除去すること
ができる。なお、図１では酵素反応槽２などの各槽の大
きさが異なって示しているが、これは実施例にみるよう
に、実際の槽の大きさの違いを加味したものである。Next, embodiments of the present invention will be described with reference to the drawings with reference to specific examples, but the present invention is not limited thereto. FIG. 1 shows a typical example of the apparatus configuration of the present invention as a flow sheet. The fat / oil containing wastewater or fat / oil containing sludge 1 is mixed with an enzyme solution 3 in an enzyme reaction tank 2 maintained at 50 to 70 ° C., and undergoes an enzyme reaction. The enzyme treatment solution 4
Is subjected to anaerobic treatment in an acid fermentation tank 5 and an anaerobic digestion fermentation tank 7,
Most of the organic matter is converted into biogas 8 containing methane and carbon dioxide as main components. This anaerobic treatment may be divided into an acid fermentation tank (4), an anaerobic digestion tank 7 and two tanks as shown in FIG. 1, or both acid fermentation and methane fermentation may be performed in one tank. Good, but the temperature in the tank is 50-70 ° C,
The pH of the reaction solution is weakly acidic, preferably pH 5.0.
To 6.3, more preferably pH 5.5 to 6.0. After the anaerobic digestion liquid 9 is subjected to solid-liquid separation, the separated water is subjected to an aerobic treatment such as an activated sludge method to remove the remaining low-molecular-weight organic substances. In FIG. 1, the size of each tank such as the enzyme reaction tank 2 is shown differently, but this takes into account the difference in the size of the actual tank as seen in the examples.
【００１５】[0015]
【実施例】以下、実施例により本発明を具体的に説明す
る。ただし本発明はこの実施例のみに限定されるもので
はない。The present invention will be described below in detail with reference to examples. However, the present invention is not limited to only this embodiment.
【００１６】実施例 食品工場排水の活性汚泥処理工程から排出される含油余
剰汚泥と、別の食品工場排水の活性汚泥処理工程から排
出される油脂含有量の低い余剰汚泥について、図１に基
づいて処理実験を行った例を示す。ただし、含油汚泥の
処理には酵素処理工程を設けたが、非含油汚泥の処理に
は酵素処理槽は設けなかった。処理条件、処理結果をそ
れぞれ第１表及び第２表に示す。酵素処理工程ではリパ
ーゼを５．０×１０7 ユニット／ｄ添加した。また嫌気
性消化液を遠心分離した上澄み液を消化液分離水とし
た。比較例として、酵素反応槽等の温度を３５±１℃と
低くした場合（比較１）、酵素反応槽のｐＨを７．０等
のように高くした場合（比較２）、酵素反応槽を設け
ず、酸醗酵槽等の温度を３５±１℃と低くした場合（比
較３）、酵素反応槽を設けず、酸醗酵槽等の温度を５５
±１℃と同じにした場合（比較４）についても処理を行
った。EXAMPLE An oil-containing excess sludge discharged from an activated sludge treatment step of a food factory wastewater and an excess sludge having a low oil and fat content discharged from an activated sludge treatment step of another food factory wastewater will be described with reference to FIG. The example which performed the processing experiment is shown. However, an enzyme treatment step was provided for the treatment of oil-containing sludge, but no enzyme treatment tank was provided for treatment of non-oil-containing sludge. Processing conditions and processing results are shown in Tables 1 and 2, respectively. In the enzyme treatment step, lipase was added at 5.0 × 10 7 units / d. The supernatant obtained by centrifuging the anaerobic digestion fluid was used as digestion fluid separation water. As a comparative example, when the temperature of the enzyme reaction tank or the like was lowered to 35 ± 1 ° C. (Comparative 1), when the pH of the enzyme reaction tank was increased to 7.0 or the like (Comparative 2), an enzyme reaction tank was provided. When the temperature of the acid fermentation tank was lowered to 35 ± 1 ° C. (Comparative 3), the temperature of the acid fermentation tank was 55
The processing was also performed when the temperature was the same as ± 1 ° C. (Comparative 4).
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【発明の効果】以上詳細に説明したとおり、本発明によ
れば、油脂含有排水あるいは油脂含有汚泥を嫌気性消化
法によって、高率の浄化を行うことができるようになっ
た。また、バイオガス発生量の増加も可能になったの
で、エネルギー回収効率を向上することができる。As described above in detail, according to the present invention, it is possible to purify oil-containing wastewater or oil-containing sludge at a high rate by an anaerobic digestion method. In addition, the amount of biogas generated can be increased, so that the energy recovery efficiency can be improved.
【図１】本発明に係る油脂含有排水あるいは油脂含有汚
泥の嫌気性処理法の実施例を示すフローシートである。FIG. 1 is a flow sheet showing an embodiment of an anaerobic treatment method for oil-containing wastewater or oil-containing sludge according to the present invention.
【符号の説明】 １ 油脂含有排水または油脂含有汚泥 ２ 酵素反応槽 ３ 酵素液 ４ 酵素処理液 ５ 酸発酵槽 ６ ｐＨ調整薬液 ７ 嫌気性消化槽 ８ バイオガス ９ 消化液[Description of Signs] 1 Oil-containing wastewater or oil-containing sludge 2 Enzyme reaction tank 3 Enzyme solution 4 Enzyme treatment solution 5 Acid fermentation tank 6 pH adjusting chemical solution 7 Anaerobic digestion tank 8 Biogas 9 Digestion liquid
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 隆幸 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 米山 豊 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 Ｆターム(参考） 4D038 AA08 AB01 BB13 BB19 4D040 AA01 AA62 AA63 4D059 AA10 BA12 EB05 EB06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takayuki Suzuki 11-1 Haneda Asahimachi, Ota-ku, Tokyo Inside Ebara Corporation (72) Inventor Yutaka Yoneyama 11-1 Haneda Asahi-cho, Ota-ku, Tokyo EBARA F-term (reference) 4D038 AA08 AB01 BB13 BB19 4D040 AA01 AA62 AA63 4D059 AA10 BA12 EB05 EB06
Claims (3)
温で酵素処理をした後に、該酵素処理液を弱酸性条件下
に高温で嫌気性処理を行うことを特徴とする油脂含有排
水あるいは油脂含有汚泥の処理方法。1. An oil-containing wastewater or oil-containing sludge characterized by subjecting an oil-containing wastewater or oil-containing sludge to an enzyme treatment at a high temperature and then subjecting the enzyme-treated liquid to anaerobic treatment at a high temperature under a weakly acidic condition. Processing method.
温度５０〜７０℃の条件で行うことを特徴とする請求項
１記載の油脂含有排水あるいは油脂含有汚泥の処理方
法。2. The anaerobic treatment is carried out at pH 5.0 to 6.3,
The method according to claim 1, wherein the treatment is performed at a temperature of 50 to 70 ° C.
条件で行うことを特徴とする請求項２記載の油脂含有排
水あるいは油脂含有汚泥の処理方法。3. The method for treating oil-containing waste water or oil-containing sludge according to claim 2, wherein the anaerobic treatment is performed under the condition of pH 5.5 to 6.0.
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| JP19324399A JP2001017989A (en) | 1999-07-07 | 1999-07-07 | Anaerobic treatment of oil and fat-containing waste water or oil and fat-containing sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19324399A JP2001017989A (en) | 1999-07-07 | 1999-07-07 | Anaerobic treatment of oil and fat-containing waste water or oil and fat-containing sludge |
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| Publication Number | Publication Date |
|---|---|
| JP2001017989A true JP2001017989A (en) | 2001-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19324399A Pending JP2001017989A (en) | 1999-07-07 | 1999-07-07 | Anaerobic treatment of oil and fat-containing waste water or oil and fat-containing sludge |
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Cited By (5)
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|---|---|---|---|---|
| JP2006150212A (en) * | 2004-11-29 | 2006-06-15 | Jfe Engineering Kk | Organic waste digestion method and device |
| JP2007054699A (en) * | 2005-08-23 | 2007-03-08 | Seiko Epson Corp | Organic waste liquid treatment method and organic waste liquid treatment system |
| CN101786776B (en) * | 2010-02-23 | 2011-10-19 | 北京欧泰克石油工程技术有限责任公司 | Advanced treatment process of sludge containing oil |
| CN105112489A (en) * | 2015-09-28 | 2015-12-02 | 农业部沼气科学研究所 | Acidification pretreatment method for producing marsh gas by using waste edible oil |
| JP2019081149A (en) * | 2017-10-31 | 2019-05-30 | 国立大学法人東京工業大学 | Anaerobic treatment method of wastewater and microorganism preparation |
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