JP2563004B2 - Treatment of wastewater containing methanol - Google Patents
Treatment of wastewater containing methanolInfo
- Publication number
- JP2563004B2 JP2563004B2 JP10341991A JP10341991A JP2563004B2 JP 2563004 B2 JP2563004 B2 JP 2563004B2 JP 10341991 A JP10341991 A JP 10341991A JP 10341991 A JP10341991 A JP 10341991A JP 2563004 B2 JP2563004 B2 JP 2563004B2
- Authority
- JP
- Japan
- Prior art keywords
- acetic acid
- methanol
- methane
- treatment
- sludge
- 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
Classifications
-
- Y02W10/12—
Landscapes
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は食品、化学、紙パルプ工
業等より排出されるメタノールを含む有機性廃水を対象
とした上向流式嫌気性汚泥床法（UpflowAnaerobic Slud
ge BlanketProcess, 以後ＵＡＳＢと記す。）に関する
ものである。FIELD OF THE INVENTION The present invention relates to an upflow anaerobic sludge bed method for organic wastewater containing methanol discharged from food, chemical, pulp and paper industries, etc.
ge Blanket Process, hereafter referred to as UASB. ) Is related to.
【０００２】[0002]
【従来の技術】メタノール基質は、中温（３５〜４０
℃）のメタン発酵（純菌レベル）では、メタノサルシナ
属、メタノコッカス属のメタン菌によりメタンと炭酸ガ
スに分解される。しかし、混合培養系では、上記反応以
外に低級脂肪酸（酢酸、ｎ−酪酸等）を経由しメタンと
炭酸ガスに分解される場合がある。（Water Research v
ol１３ pp７２５〜７３７）このような場合には前段の
酸生成反応と後段のメタン生成反応のバランスをとるこ
とがむずかしいため、高負荷なメタン発酵処理ができに
くかった。2. Description of the Prior Art Methanol substrates are medium temperature (35-40
In methane fermentation (at a pure bacterial level) at ℃), it is decomposed into methane and carbon dioxide by methanobacteria of the genus Methanosarcina and Methanococcus. However, in the mixed culture system, in addition to the above reaction, it may be decomposed into methane and carbon dioxide through a lower fatty acid (acetic acid, n-butyric acid, etc.). (Water Research v
ol13 pp725-737) In such a case, it is difficult to balance the acid production reaction in the first stage and the methane production reaction in the second stage, and thus it is difficult to perform a high-load methane fermentation treatment.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記の従来
技術における問題点を解消するために、メタン生成を担
うメタノスリクス属のメタン菌を維持させながら、酸生
成に関与する嫌気性菌を増殖させ、酸生成とメタン生成
のバランスのとれたグラニュール汚泥を形成させるメタ
ノール含有廃水の処理方法を提供することを目的とす
る。DISCLOSURE OF THE INVENTION In order to solve the above problems in the prior art, the present invention proliferates anaerobic bacteria involved in acid production while maintaining methane bacteria of the genus Methanothrix which is responsible for methane production. An object of the present invention is to provide a method for treating methanol-containing wastewater that forms granulated sludge in which acid production and methane production are well balanced.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、本発明では、メタノール含有廃水を上向流式嫌気性
汚泥床法で中温メタン発酵処理する方法において、該処
理のスタートアップ時に酢酸又は酢酸を生成する物質を
供給することを特徴とするメタノール含有廃水の処理方
法としたものであり、また、本発明は、メタノール含有
廃水を上向流式嫌気性汚泥床法で中温メタン発酵処理す
る方法において、該処理のスタートアップ時に酢酸又は
酢酸を生成する物質とメタノスリクス属のメタン菌を優
先種とした汚泥を同時あるいは別個に供給することを特
徴とするメタノール含有廃水の処理方法としたものであ
る。To achieve the above object, according to the solution to ## in the present invention, a method for mesophilic methane fermentation process methanol-containing wastewater in upflow anaerobic sludge bed process, the processing <br/> management The method for treating methanol-containing wastewater is characterized in that acetic acid or a substance that produces acetic acid is supplied at the time of start-up, and the present invention also provides a method for treating methanol-containing wastewater by an upflow anaerobic sludge bed method. a method of mesophilic methane fermentation process, the processing method of the methanol-containing waste water and supplying the sludge methane bacteria substance and Metanosurikusu genus was dominant species that produces acetic acid or acetic acid at startup of the process simultaneously or separately It is what
【０００５】ＵＡＳＢ法は、原水を発酵槽の下部より上
向流として流入させ、菌の付着担体を用いることなく、
汚泥（菌）をフロック化若しくは粒状化せしめることに
より汚泥床（スラッジベット）を形成させ、発酵槽中に
高濃度の微生物を確保するためにより高容積負荷を許容
しうる嫌気性微生物処理技術であり、中温のメタノスリ
クス属のメタン菌が優先種である種汚泥を圧密状態にリ
アクター低部から、１〜１．５ｍ充填し、原廃水を上向
流にて通水する。スタートアップ方法としては以下の２
ケースがある。 （１）原水に酢酸基質又は酢酸を生成する物質（糖分、
エタノール等）を添加する。初期においては酢酸とメタ
ノールの有機物量（CODcr, TDCベース）は２：１以上で
あり、徐々に酢酸の添加量をへらし、最終的には酢酸の
添加はなくなる。酢酸を添加することでメタノスリクス
属のメタン菌の活性度を保ちながら酸生成に関与する嫌
気性菌をグラニュール表面に増殖させることができるた
め、酸生成とメタン生成のバランスのとれたグラニュー
ル汚泥を形成させる。 （２）中温のメタノスリクス属のメタン菌が優先種であ
る汚泥を酢酸又は酢酸を生成する物質（糖分、エタノー
ル等）と同時又は別個に供給する。好ましくは酢酸を供
給したのち、例えばCODcr 負荷４〜５Kg／ｍ3 ・ｄ程に
なった時に別途添加し、酸生成とメタン生成のバランス
のとれたグラニュール汚泥にするのがよい。なお、添加
する汚泥はＵＡＳＢ法で生成されたグラニュール汚泥が
好ましいが、嫌気性消化汚泥でもかまわない。また酢酸
等の添加は原水中に添加するのがよいが、リアクター内
でもかまわない。In the UASB method, raw water is introduced as an upward flow from the lower part of a fermenter without using a carrier to which bacteria are adhered.
It is an anaerobic microbial treatment technology that can allow a high volume load to secure a high concentration of microorganisms in the fermenter by forming a sludge bed (sludge bed) by flocculating or granulating sludge (bacteria). The methane bacteria of the genus Methanothrix at medium temperature are filled with seed sludge, which is a preferential species, in a compacted state from the bottom of the reactor for 1 to 1.5 m, and the raw wastewater is passed in an upward flow. The following 2 as the startup method
There is a case. (1) A substance that produces an acetic acid substrate or acetic acid in raw water (sugar,
Ethanol, etc.) is added. In the initial stage, the amount of organic substances of acetic acid and methanol (CODcr, based on TDC) was 2: 1 or more, and the amount of acetic acid added was gradually decreased until the addition of acetic acid finally disappeared. By adding acetic acid, anaerobic bacteria involved in acid production can be grown on the granule surface while maintaining the activity of methanobacterium of the genus Methanothrix, so that granule sludge with a good balance of acid production and methanogenesis. To form. (2) Medium temperature methane bacteria of the genus Methanothrix feed sludge, which is a priority species, simultaneously with or separately from acetic acid or a substance that produces acetic acid (sugar, ethanol, etc.). Preferably, acetic acid is supplied, and then, for example, when CODcr loading reaches about 4 to 5 kg / m 3 · d, it is added separately to obtain granulated sludge in which acid production and methane production are well balanced. The sludge to be added is preferably granule sludge produced by the UASB method, but anaerobic digested sludge may be used. It is preferable to add acetic acid or the like into raw water, but it may be added in the reactor.
【０００６】[0006]
【作用】メタノール含有廃水を中温で高負荷メタン発酵
処理すると、酸生成反応が律速となり、リアクター内に
有機酸が残存し、リアクター内のpHが低下する傾向とな
り、メタン菌は失活していく。本発明のように、酢酸基
質を添加すること、メタノスリクス属のメタン菌が優先
種である汚泥を併用添加することで酸生成とメタン生成
それぞれの菌がバランスよくなったグラニュール汚泥を
形成することで、高負荷で安定したメタン発酵処理を可
能とした。なお、供給する酢酸の量はCODcr 基準でメタ
ノール１に対して２倍以上、好ましくは経済的には２〜
７倍が好ましく、一度に供給するより分割して供給する
のがよい。また分割して供給する場合、その分割を徐々
に減らすように供給するのがよい。[Function] When methanol-containing wastewater is subjected to high-load methane fermentation treatment at moderate temperature, the acid production reaction becomes rate-determining, the organic acid remains in the reactor, and the pH in the reactor tends to decrease, deactivating methane bacteria. . As in the present invention, by adding an acetic acid substrate, and by simultaneously adding sludge in which methanobacterium of the genus Methanothrix is a priority species, forming a granule sludge in which acid-producing and methanogenic bacteria are well balanced. This enabled stable methane fermentation treatment under high load. The amount of acetic acid supplied is at least twice as much as that of methanol based on CODcr, preferably 2 to economically.
It is preferably 7 times, and it is better to supply it in a divided manner than to supply it once. Further, in the case of divided supply, it is preferable to supply so that the division is gradually reduced.
【０００７】[0007]
【実施例】以下本発明を実施例により具体的に説明する
が、本発明はこれらの実施例に限定されるものでない。 実施例１ 槽有効容量３３リットルのＵＡＳＢリアクターを用い、
ビール工場廃水を対象としたＵＡＳＢリアクターより採
取したグラニュール汚泥（メタノスリクス属のメタン菌
が優先種）を種汚泥として、下記に示す原水性状の原水
を中温でＵＡＳＢ法で処理するに際し、酢酸を添加した
場合（Run-１）、添加しない場合（Run-２）について比
較実験を行った。 原水性状・・・メタノール：７２０〜３６００mg／ｌ 酵母エキス： １０ 〃 NH4 Cl ： ２６０ 〃 KH2 PO4 ： ２００ 〃 CODcr ： ５０００ 〃EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to these examples. Example 1 A UASB reactor having a tank effective capacity of 33 liters was used.
Granule sludge (methanothrix methane bacteria is a priority species) collected from a UASB reactor for brewery wastewater is used as seed sludge to add acetic acid when the raw water shown below is treated by the UASB method at medium temperature. Comparative experiments were carried out for the case (Run-1) and the case without addition (Run-2). Raw aqueous state: Methanol: 720 to 3600 mg / l Yeast extract: 10 〃 NH 4 Cl: 260 〃 KH 2 PO 4 : 200 〃 CODcr ： 5000 〃
【０００８】図１に処理成績の概要を示す。Run １では
原水の酢酸：メタノールの比率を４：１，３：２，２：
３，１：４と段階的に変えて馴致を行い４０日経過後酢
酸の添加を停止した。この時点で、酸生成とメタン生成
のバランスのとれたグラニール汚泥が形成されたので、
CODcr 負荷をさらに上げた。最終的にはCODcr ２０Kg／
ｍ3 ・ｄで９５％CODcr 除去率が得られた。一方、Run
２ではCODcr負荷５Kg／ｍ3 ・ｄ以上になると、リアク
ター内に酢酸、ｎ−酪酸等の有機酸が生成しリアクター
内のpHが５まで下がってしまいメタン発酵処理ができな
くなったので、５０日目で通水を停止している。FIG. 1 shows an outline of processing results. In Run 1, the ratio of raw water acetic acid: methanol was 4: 1, 3: 2, 2:
The acclimatization was carried out by gradually changing it to 3: 1: 4, and the addition of acetic acid was stopped after 40 days. At this point, a well-balanced granulation of acid and methane was formed,
CODcr The load was further increased. Eventually CODcr 20Kg /
A CODcr removal rate of 95% was obtained at m 3 · d. On the other hand, Run
In case of CODcr load of 5 kg / m 3 · d or more in 2, the organic acid such as acetic acid and n-butyric acid is generated in the reactor and the pH in the reactor is lowered to 5 and the methane fermentation process cannot be performed. Water is stopped visually.
【０００９】実施例２ 実施例１のRun １と同じ条件で酢酸の他に、スタート時
と、CODcr 負荷４〜５Kg／ｍ3 ・ｄになった時グラニュ
ール汚泥を添加した。（各添加量は３００ｇＭＬＶＳＳ
である。）表２に実験結果を示す。Example 2 In addition to acetic acid under the same conditions as in Run 1 of Example 1, granule sludge was added at the start and when the CODcr load was 4 to 5 kg / m 3 · d. (Each addition amount is 300 g MLVSS
Is. ) Table 2 shows the experimental results.
【表２】 [Table 2]
【００１０】表２より実験経過後２０日目にCODcr 負荷
４．５Kg／ｍ3 ・ｄになった時点でグラニュール汚泥を
添加することで４０日目にはCODcr 負荷１０Kg／ｍ3 ・
ｄ、５０日目にはCODcr 負荷１５Kg／ｍ3 ・ｄにおいて
CODcr 除去率９０％の処理成績が得られた。From Table 2, the CODcr load was 4.5 kg / m 3 · d on the 20th day after the experiment, and the granule sludge was added at the time when the CODcr load was 10 kg / m 3 · d on the 40th day.
d, CODcr load of 15 kg / m 3 · d on day 50
Treatment results with a CODcr removal rate of 90% were obtained.
【００１１】[0011]
【発明の効果】以上の結果からも明らかなように、本発
明では、メタノール含有廃水の中温ＵＡＳＢ処理を高負
荷で行えるため、今までＵＡＳＢ法が適用できなかった
紙パルプ工場ドレン廃水等への廃水への適用拡大が可能
となった。As is clear from the above results, in the present invention, since the medium temperature UASB treatment of the methanol-containing wastewater can be carried out with a high load, it is possible to use the drainage wastewater of the pulp and paper mill where the UASB method could not be applied until now. It has become possible to expand the application to wastewater.
【図１】実施例１の処理結果を示すグラフである。FIG. 1 is a graph showing a processing result of Example 1.
Claims (2)
泥床法で中温メタン発酵処理する方法において、該処理
のスタートアップ時に酢酸又は酢酸を生成する物質を供
給することを特徴とするメタノール含有廃水の処理方
法。1. A method for medium-temperature methane fermentation treatment of methanol-containing wastewater by an upflow anaerobic sludge bed method , wherein acetic acid or a substance that produces acetic acid is supplied at the start-up of the treatment, and the methanol-containing wastewater is supplied. Processing method.
泥床法で中温メタン発酵処理する方法において、該処理
のスタートアップ時に酢酸又は酢酸を生成する物質とメ
タノスリクス属のメタン菌を優先種とした汚泥を同時あ
るいは別個に供給することを特徴とするメタノール含有
廃水の処理方法。2. A method of processing mesophilic methane fermentation of methanol containing wastewater in upflow anaerobic sludge bed process and the methane bacteria substance and Metanosurikusu genus to produce acetic acid or acetic acid at startup of the process and a priority species A method for treating wastewater containing methanol, which comprises supplying sludge simultaneously or separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10341991A JP2563004B2 (en) | 1991-04-09 | 1991-04-09 | Treatment of wastewater containing methanol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10341991A JP2563004B2 (en) | 1991-04-09 | 1991-04-09 | Treatment of wastewater containing methanol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04310294A JPH04310294A (en) | 1992-11-02 |
| JP2563004B2 true JP2563004B2 (en) | 1996-12-11 |
Family
ID=14353525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10341991A Expired - Lifetime JP2563004B2 (en) | 1991-04-09 | 1991-04-09 | Treatment of wastewater containing methanol |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2563004B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008139779A1 (en) | 2007-05-11 | 2008-11-20 | Kurita Water Industries Ltd. | Method of anaerobic treatment and anaerobic treatment apparatus |
| JP2010274207A (en) * | 2009-05-29 | 2010-12-09 | Japan Organo Co Ltd | Method and apparatus for anaerobic biological treatment |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5297000B2 (en) * | 2007-05-11 | 2013-09-25 | 栗田工業株式会社 | Anaerobic treatment equipment for papermaking wastewater |
| JP5303862B2 (en) * | 2007-05-11 | 2013-10-02 | 栗田工業株式会社 | Anaerobic treatment method and anaerobic treatment apparatus |
| CN101980970B (en) * | 2008-03-26 | 2013-07-31 | 株式会社神钢环境舒立净 | Method for processing waste water |
| JP5680479B2 (en) * | 2011-05-17 | 2015-03-04 | 住友重機械工業株式会社 | Anaerobic treatment apparatus and anaerobic treatment method |
| JP5912353B2 (en) * | 2011-09-09 | 2016-04-27 | オルガノ株式会社 | Anaerobic biological treatment method and anaerobic biological treatment apparatus |
| JP2012183539A (en) * | 2012-06-01 | 2012-09-27 | Kobelco Eco-Solutions Co Ltd | Wastewater treatment method |
| CN108996681B (en) * | 2018-09-30 | 2021-12-07 | 云南天朗环境科技有限公司 | Anaerobic granular sludge and culture method and application thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63283794A (en) * | 1987-05-15 | 1988-11-21 | Shimizu Constr Co Ltd | Treatment of waste water of methane fermentation and equipment |
| JPH0268198A (en) * | 1988-09-01 | 1990-03-07 | Seitai Kinou Riyou Kagakuhin Shinseizou Gijutsu Kenkyu Kumiai | Methane fermentation reactor |
| JPH0773711B2 (en) * | 1989-06-07 | 1995-08-09 | 日本碍子株式会社 | Treatment method of alcohol waste liquid by methane fermentation |
-
1991
- 1991-04-09 JP JP10341991A patent/JP2563004B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008139779A1 (en) | 2007-05-11 | 2008-11-20 | Kurita Water Industries Ltd. | Method of anaerobic treatment and anaerobic treatment apparatus |
| US7972511B2 (en) | 2007-05-11 | 2011-07-05 | Kurita Water Industries Ltd. | Anaerobic treatment method and anaerobic treatment apparatus |
| EP2428492A1 (en) | 2007-05-11 | 2012-03-14 | Kurita Water Industries Ltd. | Anaerobic treatment method and anaerobic treatment apparatus |
| JP2010274207A (en) * | 2009-05-29 | 2010-12-09 | Japan Organo Co Ltd | Method and apparatus for anaerobic biological treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04310294A (en) | 1992-11-02 |
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