JPS6021797B2 - Anaerobic treatment method for organic waste liquid - Google Patents
Anaerobic treatment method for organic waste liquidInfo
- Publication number
- JPS6021797B2 JPS6021797B2 JP57138876A JP13887682A JPS6021797B2 JP S6021797 B2 JPS6021797 B2 JP S6021797B2 JP 57138876 A JP57138876 A JP 57138876A JP 13887682 A JP13887682 A JP 13887682A JP S6021797 B2 JPS6021797 B2 JP S6021797B2
- Authority
- JP
- Japan
- Prior art keywords
- organic waste
- waste liquid
- anaerobic treatment
- production reaction
- acid
- 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
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
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】
この発明は、有機性廃液を嫌気的に処理する方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for anaerobically treating organic waste liquid.
最近、エネルギー事情から、し尿あるいは下水処理場な
どに存在する高濃度有機性廃液や、各種工場から排出さ
れる有機性廃液、余剰汚泥、その他の有機性廃棄物（以
下これらを単に「有機性廃液Ｊという）を好気性処理に
代え、プロワーなどの使用を伴なわないランニングコス
トの安い処理法として、嫌気性処理法が注目されている
。Recently, due to the energy situation, highly concentrated organic waste liquids such as human waste or sewage treatment plants, organic waste liquids discharged from various factories, surplus sludge, and other organic wastes (hereinafter referred to simply as ``organic waste liquids'') Anaerobic treatment is attracting attention as a low running cost treatment method that does not require the use of a blower or the like, instead of aerobic treatment.
この嫌気性（消化）処理は、汚泥の発生量が少なく、ま
た、メタンガスとしてエネルギー回収することができる
。さらに、この嫌気性処理も、先ず有機性廃液中の有機
物を嫌気性液化菌群（腐敗菌群）の作用により酢酸、プ
ロピオン酸、酪酸などの揮発性有機酸にする酸生成反応
と、これら生成した有機酸がメタン生成菌によって、メ
タンに転換するガス化反応（メタン生成反応）の、二相
嫌気（消化）処理法が提案されている。This anaerobic (digestion) treatment produces less sludge and can recover energy as methane gas. Furthermore, this anaerobic treatment also involves an acid-producing reaction that first converts organic matter in organic waste into volatile organic acids such as acetic acid, propionic acid, and butyric acid through the action of anaerobic liquefaction bacteria (septic bacteria), and then A two-phase anaerobic (digestion) treatment method has been proposed in which the organic acids produced are converted into methane by methanogenic bacteria (methane production reaction).
この二相嫌気性処理法は、従釆の一糟内で嫌気処理を行
う標準消化法に比べ、処理効率が高いことが知られてい
る。This two-phase anaerobic treatment method is known to have higher treatment efficiency than the standard digestion method, which performs anaerobic treatment within a single tank.
本発明者は、嫌気性処理における酸生成反応と、それに
続くメタン生成反応をさらに詳細に研究したところ、硫
酸塩還元菌を利用することによって嫌気性処理反応を、
より促進させる知見を得ることができ、これによって、
さらに処理効率の濠れた有機性廃液の嫌気性処理方法を
得ることに成功した。The present inventor conducted a more detailed study of the acid production reaction in anaerobic treatment and the subsequent methane production reaction, and found that the anaerobic treatment reaction could be improved by using sulfate-reducing bacteria.
You can gain knowledge to further promote
Furthermore, we succeeded in developing an anaerobic treatment method for organic wastewater with improved treatment efficiency.
すなわち、本発明は、有機性廃液を酸生成反応とメタン
生成反応の二相に分けた二相嫌気処理法で処理するに際
し、醗生成反応の相から発生する硫化水素を蒲集し酸化
処理して硫酸イオンに転換し、該硫酸イオンを前記酸生
成反応の相に返送することを特徴とするものである。That is, in the present invention, when an organic waste liquid is treated by a two-phase anaerobic treatment method that is divided into two phases: an acid production reaction and a methane production reaction, hydrogen sulfide generated from the acid production reaction phase is collected and oxidized. The method is characterized in that the sulfate ions are converted into sulfate ions, and the sulfate ions are returned to the acid production reaction phase.
有機性廃液の嫌気性処理においては、メタンガス、炭酸
ガスの他に、硫化水素、窒素及び水素が発生する。In the anaerobic treatment of organic waste liquid, hydrogen sulfide, nitrogen, and hydrogen are generated in addition to methane gas and carbon dioxide gas.
このうち、硫化水素は、脱硫器を介して除去されている
。この脱硫操作は、上述した二相嫌気処理法でも、また
、従来の標準消化法にお夕し、ても採用されていて、こ
の硫化水素を積極的に消化反応に利用することはない。
むしろ、硫化水素は悪臭物質あるいはメタン生成の阻害
分質として好ましくないものとして除去の対象になって
いる。ところで、上述したように、有機性廃液の嫌気性
処理は、酸生成反応とそれに続くメタン生成反応とを有
している。Of these, hydrogen sulfide is removed through a desulfurizer. This desulfurization operation is employed in the above-mentioned two-phase anaerobic treatment method as well as in the conventional standard digestion method, and this hydrogen sulfide is not actively used in the digestion reaction.
Rather, hydrogen sulfide is considered to be an undesirable odor substance or substance that inhibits methane production, and is therefore targeted for removal. By the way, as described above, the anaerobic treatment of organic waste liquid includes an acid production reaction followed by a methane production reaction.
このうち、酸生成反応において生成される酸のうち、酢
酸以外のプロピオン酸などは、メタン生成菌によってメ
タンへ転換される速度が遅く、いわゆる反応律速となっ
ている。したがって、酸生成反応の段階で、プロピオン
酸などを酢酸の形まで分解しておくことが嫌気性処理の
効率を高めることとなる。 Ｚプロピオン
酸、酪酸あるいは乳酸などを酢酸まで分解するためには
、デスルホビブリオ（Ｄｅｓ■ｆｏｖｉｂｒｉｏ）、あ
るいはデスルホマクラム（Ｄｅｓ山ｆｏｍａｃｕｌｕｍ
）などの硫酸塩還元細菌が有効であり、そしてここで利
用される硫酸塩は、嫌Ｚ気処理工程かち得られる硫化水
素を酸化して作ることができる。Among the acids produced in the acid production reaction, propionic acid and the like other than acetic acid are converted to methane by methanogens at a slow rate, which is the so-called rate-limiting reaction. Therefore, decomposing propionic acid and the like into acetic acid at the stage of the acid production reaction increases the efficiency of anaerobic treatment. In order to decompose propionic acid, butyric acid, lactic acid, etc. to acetic acid, Desulfovibrio or Desulfomaculum must be used.
) are effective, and the sulfate used here can be made by oxidizing hydrogen sulfide obtained from the anaerobic treatment process.
硫酸塩還元細菌は、絶対嫌気性細菌であって、硫酸塩の
結合酸素を水素受容体として有機物を酸化分解する。Sulfate-reducing bacteria are obligate anaerobic bacteria that oxidize and decompose organic matter using the bound oxygen of sulfate as a hydrogen acceptor.
しかし、この反応は、一般に不完全２で酢酸の形に蓄積
する煩向がある。上記のプロピオン酸の硫酸塩還元細菌
による硫酸還元反応は次式に示される。However, this reaction is generally incomplete and tends to accumulate in the form of acetic acid. The above sulfate reduction reaction of propionic acid by sulfate-reducing bacteria is shown by the following equation.
等雌Ｈ２ＣＯＯ‐十餅２０十ヂ２Ｃ。Equal female H2COO-Jumochi20Juji2C.
３ 十雌‐一ざ日３ＣＯＯ‐十夕。3 Jume-Ichizahi 3COO-Juya.
２十はＳ 十舞。20 is S Ten dances.
十茎ＨＣ。；十許Ｈ‐以上の式から明らかなように、プ
ロピオン酸は、酢酸まで分解される。Ten stalks HC. ; Juhyo H - As is clear from the above formula, propionic acid is decomposed to acetic acid.
このとき、プロピオン酸４／３モルに対し、硫酸イオン
１モルを必要とすることが分る。なお、有機性廃液を消
化するときのこの硫酸イオンの添加量は、廃液中の有機
性炭素に対し、０．３〜３倍（モル比）以上の量を存在
させることにより、効果的に酢酸まで分解することがで
きる。At this time, it is found that 1 mole of sulfate ion is required for 4/3 mole of propionic acid. When digesting organic waste liquid, the amount of sulfate ions added should be 0.3 to 3 times (molar ratio) more than the organic carbon in the waste liquid, so that it can effectively digest up to acetic acid. Can be disassembled.
また、消化工程から得られるプロピオン酸を触媒燃焼、
過酸化水素、オゾンあるいは生物によるィオウ酸化法な
どによって酸化して得られた硫酸だけでは不足する場合
は、その不足分を補うように、他のィオウ化合物を補給
するようにする。上述した硫酸塩還元反応は、嫌気性消
化工程の中において行われるが、特に二相嫌気処理法の
酸生成反応と同時に行わせることができる。つまり、酸
生成反応槽から硫化水素を蒲集しこれを酸化手段を介し
て硫酸に酸化し、これを反応槽に添加する。In addition, catalytic combustion of propionic acid obtained from the digestion process,
If sulfuric acid obtained by oxidation using hydrogen peroxide, ozone, or biological sulfur oxidation is insufficient, other sulfur compounds are supplied to make up for the deficiency. The above-mentioned sulfate reduction reaction is carried out during the anaerobic digestion process, but can particularly be carried out simultaneously with the acid production reaction in the two-phase anaerobic treatment method. That is, hydrogen sulfide is collected from the acid-producing reaction tank, oxidized to sulfuric acid via an oxidizing means, and this is added to the reaction tank.
添加量は前述したように、廃液中の有機性炭素に対し、
０．３〜３倍（モル比）以上の量を添加する。このよう
に硫酸イオンを添加した反応槽であっても、従釆の酸生
成反応の操作と同様に嫌気的に混合燈洋するだけでよく
、また、これに続くメタン生成反応も従来どおりでよい
。したがって、メタン生成槽においては、主として酢酸
をメタン生成すればよいので、効果的にメタンガスに転
換することができる。本発明方法によれば、すなわち、
プロピオン酸などを酢酸までに分解した場合は、従来の
ように、単に酸生成反応を経た有機酸をメタンガスに転
換するためのメタン生成反応時間よりも、２〜３割短縮
することができる。As mentioned above, the amount added is based on the organic carbon in the waste liquid.
An amount of 0.3 to 3 times (molar ratio) or more is added. Even in a reaction tank in which sulfate ions are added, it is sufficient to carry out mixed oxidation anaerobically in the same way as the secondary acid production reaction, and the subsequent methane production reaction can be carried out as usual. . Therefore, in the methane generation tank, it is sufficient to mainly generate methane from acetic acid, so that it can be effectively converted into methane gas. According to the method of the invention, namely:
When propionic acid or the like is decomposed into acetic acid, the methane production reaction time can be shortened by 20 to 30% compared to the conventional methane production reaction time for simply converting an organic acid that has undergone an acid production reaction into methane gas.
したがって、消化槽の容量を小さくすることも可能とな
る。もちろん、本発明は、従来の標準消化法にも適用可
能であり、この場合も上述した二相嫌気消化法への適用
したときと同様の効果を得ることができる。Therefore, it is also possible to reduce the capacity of the digester. Of course, the present invention can also be applied to conventional standard digestion methods, and in this case as well, the same effects as when applied to the above-mentioned two-phase anaerobic digestion method can be obtained.
また、本発明は、既設の消化槽に簡単に適用することも
できる。Furthermore, the present invention can be easily applied to existing digestion tanks.
実施例
混合漉投手段を有する酸生成反応槽（有効容積２０〆）
にし尿処理場から発生した余剰汚泥（固形物濃度２％（
Ｍ／ｗｔ））を有機物負荷０．８〜１．２ｋ９・ＢＯＤ
／で・ｄで投入し、温度３７０、ｐＨを６．５〜７．０
に調整しながら、滞留時間１０〜１５日の条件で酸生成
反応を行った。Example Acid production reaction tank with mixing and straining means (effective volume 20〆)
Excess sludge generated from human waste treatment plants (solids concentration 2%)
M/wt)) with an organic load of 0.8 to 1.2k9・BOD
/d/d, temperature 370, pH 6.5-7.0
The acid production reaction was carried out under conditions of a residence time of 10 to 15 days while adjusting the conditions.
上述の酸生成反応槽に、酸生成反応槽から捕集した硫化
水素を、過酸化水素で酸化して得た硫酸を、下表に示す
割合で、酸生成反応槽に返送した。なお、この返送割合
は、有機性炭素Ｃに対し、硫酸イオンＳＯをを所定割合
（モル比）になるように行った。このときの有機性ＴＯ
ＣＩｇ当りの総揮発性酸に占める酢酸生成量（％）を下
表に示す。Sulfuric acid obtained by oxidizing hydrogen sulfide collected from the acid production reaction tank with hydrogen peroxide was returned to the acid production reaction tank at the rate shown in the table below. Note that this return ratio was such that the sulfate ion SO was in a predetermined ratio (molar ratio) to the organic carbon C. Organic TO at this time
The table below shows the amount of acetic acid produced (%) in the total volatile acids per CIg.
※ 比較例を示す。* Shows a comparative example.
以上の実施例から明らかなように、硫酸イオンを有機性
炭素に対し、一定以上添加するようにすると、酢酸生成
を効果的に進めることができる。As is clear from the above examples, when sulfate ions are added to organic carbon at a certain level or more, acetic acid production can be effectively promoted.
Claims (1)
分けた二相嫌気処理法で処理するに際し、酸生成反応の
相から発生する硫化水素を捕集し酸化処理して硫酸イオ
ンに転換し、該硫酸イオンを前記酸生成反応の相に返送
することを特徴とする有機性廃液の嫌気性処理法。 ２ 有機性廃液の有機炭素に対し０．３〜３倍（モル比
）以上になる硫酸イオンを返送させることを特徴とする
特許請求の範囲第１項に記載した有機性廃液の嫌気性処
理法。[Scope of Claims] 1. When treating organic waste liquid with a two-phase anaerobic treatment method that separates the organic waste into two phases: an acid production reaction and a methane production reaction, hydrogen sulfide generated from the acid production reaction phase is collected and oxidized. A method for anaerobic treatment of organic waste liquid, characterized in that the sulfate ions are converted into sulfate ions, and the sulfate ions are returned to the acid production reaction phase. 2. The anaerobic treatment method for organic waste liquid as set forth in claim 1, characterized in that sulfate ions are returned in an amount of 0.3 to 3 times (molar ratio) or more to organic carbon in the organic waste liquid. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57138876A JPS6021797B2 (en) | 1982-08-10 | 1982-08-10 | Anaerobic treatment method for organic waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57138876A JPS6021797B2 (en) | 1982-08-10 | 1982-08-10 | Anaerobic treatment method for organic waste liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5929090A JPS5929090A (en) | 1984-02-16 |
| JPS6021797B2 true JPS6021797B2 (en) | 1985-05-29 |
Family
ID=15232172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57138876A Expired JPS6021797B2 (en) | 1982-08-10 | 1982-08-10 | Anaerobic treatment method for organic waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6021797B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108597U (en) * | 1988-01-13 | 1989-07-21 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929091B2 (en) * | 1979-04-21 | 1984-07-18 | 新日本製鐵株式会社 | Manufacturing method of ferritic stainless steel sheet |
| AU2010286315A1 (en) * | 2009-08-24 | 2012-03-15 | Kellogg Brown & Root Llc | Biological wastewater treatment method |
| JP5481255B2 (en) * | 2010-04-01 | 2014-04-23 | 株式会社東芝 | Waste water treatment apparatus and waste water treatment method |
-
1982
- 1982-08-10 JP JP57138876A patent/JPS6021797B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108597U (en) * | 1988-01-13 | 1989-07-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5929090A (en) | 1984-02-16 |
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