JPH07163996A - Treatment of sewage and sludge - Google Patents

Abstract

PURPOSE:To treat even an org. undissolved sludge by subjecting sewage and sludge to solid-liq. separation, treating the separated solid as the org. undissolved component with an enzyme having substrate specificity for the solid and then biologically treating the enzyme-treated product. CONSTITUTION:When sewage and sludge are treated, the sewage and sludge are subjected to solid-liq. separation, and the solid as the separated org. undissolved component is treated with an enzyme having substrate specificity for the solid. The enzyme-treated product is then biologically treated. In this case, the biological treatment is conducted with a ligneous small piece consisting of 60-65% cellulose, 15-25% lignin and 11-16% of the balance water, etc., and with the diameter controlled to 0.2-5mm by removing the fine powder from the crushed raw wood. The enzyme-treated product is mixed with the liq. generated in the solid-liq. separation or the filtrate from adsorption filtration, and the mixture may be added to the biological treatment.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は汚水・汚泥の処理方法に
係り、特に食品化工業等における産業汚水・汚泥中に含
まれる有機性の溶解物質ならびに未溶解物質を同時に処
理することのできる汚水・汚泥の処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating sewage and sludge, and more particularly industrial sewage in food processing industry and sewage capable of simultaneously treating organic dissolved substances and undissolved substances contained in sludge. -Regarding the sludge treatment method.

【０００２】[0002]

【従来の技術および発明が解決しようとする課題】種々
の環境から排出される汚泥の種類は、その処理工程から
見て発生源別にスクリーンかす、沈砂、沈澱池汚泥、散
水濾床処理後の沈澱汚泥、活性汚泥処理後の余剰汚泥、
嫌気性消化汚泥、及び好気性消化汚泥等々に大別され
る。2. Description of the Related Art The types of sludge discharged from various environments are classified according to the source of treatment, such as screen dregs, sand, sedimentation pond sludge, and sedimentation after sprinkling filter treatment. Sludge, excess sludge after activated sludge treatment,
It is roughly classified into anaerobic digested sludge and aerobic digested sludge.

【０００３】一般にこの様な各種汚泥を投棄可能な形態
に処理する方法としては、従来から酸化・燃焼等の物理
・化学的な処理に加え、近年微生物の活性を利用した嫌
気消化、好気消化等の生物化学処理方法が注目され、各
分野で開発実用化されている。しかしこれらの処理方法
については、関連する工程、すなわち濃縮や脱水等につ
いて、その適用性の優劣や操作上の諸問題並びに最終的
な処分までの経費等に多くの難点が残されている。Generally, as a method for treating such various sludges into a form that can be discarded, in addition to physical and chemical treatments such as oxidation and combustion, anaerobic digestion and aerobic digestion utilizing the activity of microorganisms have been used in recent years. Biochemical treatment methods such as the above have attracted attention and have been developed and put to practical use in various fields. However, with regard to these treatment methods, many difficulties remain in respect of the relevant steps, that is, concentration and dehydration, inferiority of applicability, operational problems, and cost until final disposal.

【０００４】この様な汚水・汚泥処理における処理方法
として本発明者等はスギ材の木質部分を破砕して得られ
る所定粒度の微細な木質細片中に各種の被処理汚水・汚
泥を注入するという極めて簡単な処理によって汚水・汚
泥が完全に分解消化および濾過され、しかもかかる木質
細片を透過した後の排水はｓｓ、ＢＯＤ等の規制基準の
点で直接放流もしくは地中への浸透を許容される程度に
まで処理できることを発見しこれらの処理方法および装
置等をすでに提案している（特公平２−３０７６０およ
び２−３６４７９号）。As a treatment method in such wastewater / sludge treatment, the inventors of the present invention inject various kinds of wastewater / sludge into fine wood particles of a predetermined grain size obtained by crushing wood parts of cedar wood. Sewage and sludge are completely decomposed and digested and filtered by such an extremely simple treatment, and the wastewater after passing through such wood chips allows direct discharge or infiltration into the ground in terms of regulatory standards such as ss and BOD. It has been discovered that it can be processed to the extent that it is processed and has already proposed such processing methods and devices (Japanese Patent Publication No. 30760 and 2-36479).

【０００５】しかしながら、一般工業用排水生活雑排水
中には有機性の未溶解汚泥物質が混在している場合が多
く、前記先行技術においても未溶解物質は予め沈澱除去
した後木質細片媒質により処理がなされていた。特に未
溶解物質はＢＯＤ成分が多くそのまゝ木質細片媒質中に
注入すると目づまりを生じるおそれがあり、また微生物
による固形物消化は相当の時間がかかる等その二次処理
に問題を残している。However, in many cases, organic undissolved sludge substances are mixed in general industrial wastewater and domestic wastewater, and in the above-mentioned prior art, undissolved substances are preliminarily precipitated and removed by a wood chip medium. It was being processed. In particular, undissolved substances have a large amount of BOD components, which may cause clogging when injected into the wood chip medium, and the digestion of solids by microorganisms takes a considerable amount of time, which leaves a problem in the secondary treatment. .

【０００６】特に食品化工業例えば米穀類、澱粉類、豆
類、肉類、魚介類等の加工産業の施設から発生する汚水
中には多糖類、蛋白質類、脂質類等の溶解成分の他、種
々の未溶解成分（ｓｓ）が含有されていることが多く、
洗浄工程から排出されるいわゆる米のとぎ汁（たとえば
１回目のとぎ汁）のＢＯＤ成分はその大半が未溶解成分
で約１１，１００ｍｇ／ｌの高濃度を有し、ＮおよびＰ
成分の濃度も１１１ｍｇ／ｌおよび３２ｍｇ／ｌと極め
て高い値を有する。[0006] In particular, in addition to soluble components such as polysaccharides, proteins, lipids, etc. in wastewater generated from facilities of the food processing industry such as rice grains, starches, beans, meats, seafood, etc. Often contains undissolved components (ss),
Most of the BOD components of so-called rice broth (eg first broth) discharged from the washing step are undissolved components and have a high concentration of about 11,100 mg / l.
The concentrations of the components also have extremely high values of 111 mg / l and 32 mg / l.

【０００７】このような高ＢＯＤ，高ｓｓの汚水をたと
えば処理媒質としての木質細片層中で微生物処理する
と、目詰まりにより処理層のオーバフローが生じやす
く、大量の汚水を処理するために処理槽のスケールを大
型化せねば成らない問題がある。また木質細片中におい
ては主として土壌菌に属する微生物が汚水中の処理成分
に対応して選択的に優勢となりこれら成分を消化・分解
するが、汚水中の成分の分子量が比較的大きな場合には
これらに対する微生物の消化・分解作用はそれほど迅速
には進行しないので対象によっては処理効率に一定の限
界があり大量の汚水処理には適しないことがある。[0007] When such high BOD and high ss sewage is treated by microorganisms, for example, in a wood strip layer as a treatment medium, overflow of the treatment layer easily occurs due to clogging, and a treatment tank for treating a large amount of sewage is required. There is a problem that needs to be increased in scale. Also, in wood chips, microorganisms mainly belonging to soil fungi selectively become dominant in response to the treated components in wastewater and digest and decompose these components, but when the molecular weight of the components in the wastewater is relatively large. Since the digestive / degradative action of microorganisms on these does not proceed so rapidly, depending on the subject, there is a certain limit to the treatment efficiency and it may not be suitable for treating a large amount of wastewater.

【０００８】本発明の目的は汚水中の有機性の未溶解汚
泥物質を容易に木質細片媒体層において効率的に消化・
分解することのできる処理方法を提供することにある。An object of the present invention is to easily digest organic undissolved sludge substances in wastewater efficiently in a wood chip medium layer.
It is to provide a processing method that can be decomposed.

【０００９】[0009]

【課題を達成するための手段】前記本発明の課題は汚水
・汚泥を固液分離し、分離された有機性の未溶解成分と
しての固形分をこの成分についての基質特異性を有する
含む酵素によって処理し、次いで前記酵素処理による生
成物を微生物処理することからなる汚水・汚泥処理の処
理方法によって達成される。[Means for Achieving the Object] The object of the present invention is to perform solid-liquid separation of sewage and sludge, and to separate the separated solid matter as an organic undissolved component by an enzyme having substrate specificity for this component. It is achieved by a treatment method of sewage / sludge treatment, which comprises treatment, followed by microbial treatment of the product of the enzyme treatment.

【００１０】[0010]

【作用】本発明においては未溶解成分濃度の大きな汚水
が固液分離によって固形物と前記未溶解成分濃度が低下
された液分とに分離され、分離された固形物がまず酵素
によって分解処理される。In the present invention, sewage having a large concentration of undissolved components is separated by solid-liquid separation into a solid and a liquid having a reduced concentration of undissolved components, and the separated solid is first decomposed by an enzyme. It

【００１１】酵素は生体内でつくられる有機触媒でその
本体は高次構造を有する球状の蛋白質であり、蛋白質と
しての性能と触媒作用とを有している。有機触媒である
酵素は無機触媒とは異なって常温常圧で化学反応の速度
を促進するが、その酵素活性を維持するため夫々の酵素
の性質に至適の温度およびｐＨ等条件の範囲内で処理す
る必要がある。An enzyme is an organic catalyst produced in the living body, and its main body is a spherical protein having a higher-order structure, and has the performance and catalytic action as a protein. Unlike inorganic catalysts, enzymes that are organic catalysts accelerate the rate of chemical reaction at room temperature and atmospheric pressure, but in order to maintain their enzymatic activity, the temperature and pH should be optimized within the range of optimum conditions for each enzyme. Need to be processed.

【００１２】酵素は特定の基質の特定の化学反応にのみ
触媒作用を示す厳密な基質特異性を有しており、多糖
類、蛋白質類、脂質類等の汚水中の処理対象成分（基
質）に応じてこれらに特異的に作用する酵素が単独で又
は場合によって組合せて用いられる。An enzyme has a strict substrate specificity that catalyzes only a specific chemical reaction of a specific substrate, and is used as a component (substrate) to be treated in wastewater such as polysaccharides, proteins and lipids. Accordingly, the enzymes that act specifically on these are used alone or in combination as the case may be.

【００１３】たとえば前記固液分離された未溶解成分が
多糖類特に澱粉質を主成分とする場合には、糖類分解酵
素としてのグルコアミラーゼを３０〜５０℃で作用させ
ると澱粉がグルコースに分解され、水溶液として処理す
ることが可能になる。For example, when the solid-liquid separated undissolved component has a polysaccharide, particularly starch, as a main component, glucoamylase as a saccharide-degrading enzyme is allowed to act at 30 to 50 ° C. to decompose the starch into glucose. It becomes possible to process it as an aqueous solution.

【００１４】また澱粉質を加熱処理糊化（α化）させて
からαアミラーゼを作用させると加水分解により澱粉構
造のα１、４結合がランダムに切断されて澱粉糊の粘度
が急激に低下して水の様なさら々した状態になるいわゆ
る澱粉液化現象が起こり、この状態ではたとえば木質細
片中における微生物処理が極めて効率的に進行すること
が判明している。When the starch material is gelatinized (heated) by heat treatment and then treated with α-amylase, the α1,4 bond of the starch structure is randomly cleaved by hydrolysis, and the viscosity of the starch paste is rapidly lowered. It has been found that a so-called starch liquefaction phenomenon occurs, which becomes a fluffy state such as water, and in this state, microbial treatment in, for example, wood chips proceeds extremely efficiently.

【００１５】蛋白質分解酵素としてはペプチド結合（−
ＣＯ−ＮＨ−）の加水分解反応に関与して触媒反応をす
る酵素として種々のプロテアーゼが知られている。プロ
テアーゼは蛋白質分子内のペプチド結合を加水分解して
蛋白質や高分子ペプチドを低分子の水溶性ペプチドに分
解する。これらの水溶液或は軟質なペースト状のものを
水で希釈して木質細片媒体層中において処理すると未溶
解固体成分の場合とは異なって容易に微生物処理するこ
とができる。尚高濃度溶液の場合は処理層を多段にして
処理することにより目的を達成することが出来る。その
他酵素による脂質類の処理には各種リパーゼが、せん維
質の処理にはセルラーゼ等が用いられる。As a proteolytic enzyme, a peptide bond (-
Various proteases are known as enzymes that participate in the hydrolysis reaction of CO-NH-) and carry out a catalytic reaction. Proteases hydrolyze peptide bonds in protein molecules to decompose proteins or high-molecular peptides into low-molecular water-soluble peptides. When these aqueous solutions or soft pastes are diluted with water and treated in a wood chip medium layer, they can be easily treated with microorganisms unlike the case of undissolved solid components. In the case of a high-concentration solution, the purpose can be achieved by treating the treatment layers in multiple stages. Various lipases are used for treating lipids with other enzymes, and cellulase and the like for treating fibrous substances.

【００１６】このように汚水処理に際して酵素処理を介
在させることによる微生物処理の効率の向上は、主とし
て未溶解成分の固形物が酵素分解によって低分子量化さ
れ、可溶解化もしくはゾル化することにより処理層中の
透水性および成分の分散性が高まることによるものであ
るが、その他このような低分子量化によって木質細片中
の微生物が分解消化に関与しやすい形態となることによ
るものと考えられる。[0016] As described above, the efficiency of microbial treatment is improved by interposing enzyme treatment during the treatment of sewage, mainly by treating the solid matter of the undissolved component with a low molecular weight by enzymatic decomposition to render it soluble or sol. This is because the water permeability and the dispersibility of the components in the layer are enhanced, but it is considered that other reasons are that the microorganisms in the wood chips are likely to be involved in decomposing and digesting due to such low molecular weight.

【００１７】前記のように本発明において用いる酵素は
処理対象とする汚水中の未溶解成分の種類に応じて適宜
に選択されるが、このような酵素自体は広範な種類のも
のが市販されており、目的に応じて選択することが可能
である。また後述する実施例において記載するように、
処理に必要な酵素量は処理成分の固形分に関して極めて
少量（０．２〜０．４％）であり、酵素の使用は全体的
な処理コストに殆ど影響を与えない。As described above, the enzyme used in the present invention is appropriately selected according to the type of undissolved component in the wastewater to be treated, but a wide variety of such enzymes are commercially available. And can be selected according to the purpose. Also, as described in the examples described below,
The amount of enzyme required for the treatment is extremely small (0.2-0.4%) with respect to the solid content of the treated components, and the use of the enzyme has little effect on the overall treatment cost.

【００１８】前記のようにして酵素処理された生成物は
そのまゝでまたは固液分離によって得られた液分によっ
て希釈もしくは懸濁されて微生物処理に付される。微生
物処理には任意の方法が用いられるが、たとえば前記特
公平２−３０７６０および２−３６４７９号に記載され
た木質細片を微生物の処理媒体とすることが好ましい。The product treated with the enzyme as described above is subjected to microbial treatment as it is or after being diluted or suspended with the liquid obtained by solid-liquid separation. Although any method can be used for treating the microorganisms, it is preferable to use, for example, the wood chips described in JP-B Nos. 2-30760 and 2-36479 as a treatment medium for the microorganisms.

【００１９】この木質細片としてはスギ材を原料とし、
セルロース６０〜６５％、リグニン１５〜２５％、ペン
トザン１０〜１５％および水分等の残部１１〜１６％か
らなり、かつ粉砕した原木材料から微粉末部分を除去し
て粒径を実質的に０．２mm〜５mmの範囲とした木質細片
が好ましく用いられる。The wood chips are made of cedar wood,
It is composed of 60 to 65% cellulose, 15 to 25% lignin, 10 to 15% pentosan, and the remaining 11 to 16% such as water, and the fine powder portion is removed from the crushed raw wood material to have a particle size of substantially 0. Wood strips in the range of 2 mm to 5 mm are preferably used.

【００２０】尚汚水・汚泥の固液分離方法としては汚水
を沈降槽で上澄液と未溶解物（固形物）とに沈澱分離さ
せる方法、またはアンスラサイト等の表面吸着（付着）
濾過性を有する充填物を含む濾過槽中で体積濾過により
濾液と未溶解物とに分離する方法等が用いられる。As a solid-liquid separation method of sewage and sludge, sewage is precipitated and separated into a supernatant and an undissolved material (solid matter) in a sedimentation tank, or surface adsorption (adhesion) of anthracite and the like.
A method of separating a filtrate and an undissolved substance by volumetric filtration in a filtration tank containing a filler having filterability is used.

【００２１】以下本発明を実施例によって説明する。The present invention will be described below with reference to examples.

【実施例１】米１０ｋｇを水４０ｋｇで充分に洗浄し、
生じたｐＨ７．０およびｓｓ濃度０．２５％の排水を沈
降槽中で上澄液と未溶解物とに沈澱分離した。Example 1 10 kg of rice was thoroughly washed with 40 kg of water,
The resulting waste water having a pH of 7.0 and a ss concentration of 0.25% was separated into a supernatant and an undissolved substance in a sedimentation tank.

【００２２】沈澱した未溶解物（固形物１００ｇ）を１
００℃に加熱して糊化（α化）し、これにアミラーゼ
（商品名アミラーゼＡアミノ）を０．３ｇ投入し７０℃
で１時間処理したところ、澱粉液化によって粘度が低下
した。これを前記の上澄液と再度混合してｐＨ６．５お
よびＢＯＤ４０００ｐｐｍの混合液が得られた。The precipitated undissolved material (solid 100 g) was added to 1
Gelatinize (alpha) by heating to 00 ° C, add 0.3 g of amylase (brand name amylase A amino) to 70 ° C
After treatment for 1 hour, the viscosity decreased due to starch liquefaction. This was mixed again with the above supernatant to obtain a mixed solution having a pH of 6.5 and BOD of 4000 ppm.

【００２３】粒径０．２〜５ｍｍの前記木質細片５００
リットルを直径６０ｃｍ、高さ２００ｃｍの円筒形パン
チメタル槽に充填し、前記混合液を２５リットル／時の
流量で通水処理した結果、処理槽からの排出液のｐＨは
５．５となり、ＢＯＤは７００ｐｐｍに減少した。The wood strip 500 having a particle size of 0.2-5 mm
A cylindrical punched metal tank having a diameter of 60 cm and a height of 200 cm was filled with liter, and the mixed solution was treated with water at a flow rate of 25 liters / hour. As a result, the pH of the discharged liquid from the processing tank was 5.5, Was reduced to 700 ppm.

【００２４】さらに２段処理として前記と同様の木質細
片媒質処理槽中においてこの排水を同条件で処理したと
ころ、排出液のｐＨが５．０となりＢＯＤは２０ｐｐｍ
に低下された。When this waste water was treated under the same conditions in the same wood chip medium treatment tank as the above-mentioned two-stage treatment, the pH of the discharged liquid was 5.0 and the BOD was 20 ppm.
Was lowered to.

【００２５】[0025]

【実施例２】２０ｃｍφ×５０ｃｍ（高）の円筒形濾過
槽に粒径３−５ｍｍのアンスラサイト１３リットルを充
填し、この濾過槽にｐＨ７．００、ｓｓ濃度０．２１％
の澱粉系汚水１００リットルを、通水して濾過した。濾
過終了後槽内を水切りし、グルコアミラーゼ（商品名グ
ルワザイルＡＦ６）０．５ｇを水３リットルに溶解し、
ｐＨを４．５に調整した水溶液を槽内に注入し、５５℃
で４時間酵素処理を行う。この間、１分間の空気攪拌を
３０分間隔毎に行った。Example 2 A cylindrical filter tank of 20 cmφ × 50 cm (high) was filled with 13 liters of anthracite having a particle size of 3-5 mm, and the filter tank had pH 7.00 and ss concentration of 0.21%.
100 liters of the starch-based sewage water of 1. was passed through and filtered. After the filtration is completed, the inside of the tank is drained and 0.5 g of glucoamylase (trade name Gluwazail AF6) is dissolved in 3 liters of water,
Aqueous solution with pH adjusted to 4.5 is poured into the bath and heated to 55 ° C.
Enzyme treatment for 4 hours. During this period, air agitation for 1 minute was performed at intervals of 30 minutes.

【００２６】処理終了後、アンスラサイトの濾過水によ
ってアンスラサイトを逆洗浄し、この洗浄排水を前記残
濾過水と混合するとｐＨ６．５およびＢＯＤ６０００ｐ
ｐｍの混合液となった。前記混合液を実施例１で使用し
たものと同様な木質細片媒体槽中で同じ条件で微生物処
理した結果、排水中のｐＨが５．５となり、ＢＯＤは８
０ｐｐｍに減少した。After the treatment, the anthracite was back-washed with the filtered water of the anthracite, and the washing waste water was mixed with the residual filtered water to obtain a pH of 6.5 and a BOD of 6000 p.
It became a mixed solution of pm. The mixture was subjected to microbial treatment under the same conditions in a wood chip medium tank similar to that used in Example 1, resulting in a pH of 5.5 in the waste water and a BOD of 8
It decreased to 0 ppm.

【００２７】[0027]

【比較例】前記実施例１、２と同一条件下で米の洗浄排
水をアミラーゼまたはグルコアミラーゼによる処理を行
わず、直接木質細片によって微生物処理したところ、夫
々の場合において木質細片中に目詰まりが生じ処理が不
可能となった。目詰りを防ぐためには木質細片層に供給
する排水を少なくとも３倍に希釈せねばならず、かつ処
理槽の容積を３倍に増大させねばならなかった。COMPARATIVE EXAMPLE Under the same conditions as in Examples 1 and 2, the washing wastewater of rice was directly treated with wood chips without treatment with amylase or glucoamylase. Clogged up and processing became impossible. In order to prevent clogging, the wastewater supplied to the wood chip layer had to be diluted at least 3-fold, and the volume of the treatment tank had to be tripled.

【００２８】[0028]

【実施例３】動物性蛋白質を主として含むｐＨ７．５で
ｓｓ濃度０．１％の汚水１００リットルを沈降槽中で上
澄液と未溶解固形物とに沈降分離させた。沈降物（固形
物１００ｇ）にプロテアーゼ（商品名フロレザー）０．
３ｇを投入し、ｐＨ９に調整して温度５０℃で３時間酵
素処理を行った。Example 3 100 liters of sewage having a pH of 7.5 and mainly containing animal protein and a ss concentration of 0.1% was subjected to sedimentation separation into a supernatant and an undissolved solid matter in a sedimentation tank. Protease (trade name: Florezer) was added to the sediment (solid 100 g).
3 g was added, the pH was adjusted to 9, and the enzyme treatment was performed at a temperature of 50 ° C. for 3 hours.

【００２９】処理終了後これを前記上澄液と混合すると
ｐＨ８．０でＢＯＤが４５００ｐｐｍの混合液が得られ
た。次いで前記実施例１と同様にして木質細片槽による
微生物処理を施したところ得られた排水のｐＨは６．８
に、ＢＯＤは２０ｐｐｍに低下した。After the completion of the treatment, this was mixed with the above supernatant to obtain a mixed solution having pH 8.0 and BOD of 4500 ppm. Then, the effluent obtained by microbial treatment with a wood strip tank in the same manner as in Example 1 had a pH of 6.8.
In addition, the BOD dropped to 20 ppm.

【００３０】[0030]

【発明の効果】本発明においては、汚水・汚泥の微生物
処理に際して、汚水を予め固液分離して得られる固形物
をその成分に対する基質特異性を有する酵素によって処
理することにより、微生物処理における処理媒質の目詰
まりがなくなり、処理効率が著しく向上する。INDUSTRIAL APPLICABILITY According to the present invention, in the microbial treatment of sewage and sludge, the solid matter obtained by solid-liquid separation of sewage in advance is treated with an enzyme having a substrate specificity for its components, thereby treating in microbial treatment. The clogging of the medium is eliminated and the processing efficiency is significantly improved.

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 汚水・汚泥を固液分離し、分離された有
機性の未溶解成分としての固形分をこの成分についての
基質特異性を有する含む酵素によって処理し、次いで前
記酵素処理による生成物を微生物処理することからなる
汚水・汚泥処理の処理方法。1. Sewage / sludge is subjected to solid-liquid separation, the separated solid matter as an organic undissolved component is treated with an enzyme having a substrate specificity for this component, and then the product obtained by the enzyme treatment. A method for treating sewage and sludge, which comprises microbial treatment of water. 【請求項２】 セルロース６０〜６５％、リグニン１５
〜２５％、ペントザン１０〜１５％および水分等の残部
１１〜１６％からなり、かつ粉砕した原木材料から微粉
末部分を除去して粒径を実質的に０．２mm〜５mmの範囲
としたスギ材からなる木質細片によって前記微生物処理
を行う請求項１記載の処理方法。2. Cellulose 60-65%, lignin 15
-25%, pentosan 10-15%, and the balance 11-16% of water and the like, and the fine powder part was removed from the crushed raw wood material to obtain a grain diameter of substantially 0.2 mm to 5 mm. The treatment method according to claim 1, wherein the microbial treatment is performed with a wood strip made of wood. 【請求項３】 前記酵素処理による生成物を前記固液分
離によって分離された液分と合せて前記微生物処理に付
する請求項１記載の処理方法。3. The treatment method according to claim 1, wherein the product obtained by the enzyme treatment is combined with the liquid fraction separated by the solid-liquid separation and subjected to the microbial treatment. 【請求項４】 前記固液分離を吸着性充填物槽中の濾過
によって行ない、次いで分離された固形分を微生物処理
に付する前記請求項１記載の処理方法。4. The treatment method according to claim 1, wherein the solid-liquid separation is carried out by filtration in an adsorptive packing tank, and then the separated solid content is subjected to microbial treatment. 【請求項５】 前記酵素処理による生成物を前記吸着濾
過によって生じる濾液分と合せて前記微生物処理に付す
る請求項４記載の処理方法。5. The treatment method according to claim 4, wherein the product obtained by the enzyme treatment is combined with the filtrate produced by the adsorptive filtration and subjected to the microbial treatment.