JP4223796B2

JP4223796B2 - Anaerobic treatment apparatus and treatment method

Info

Publication number: JP4223796B2
Application number: JP2002365452A
Authority: JP
Inventors: 利宏鈴木; 將明西本; 一司安田; 康弘本間
Original assignee: Ebara Corp
Current assignee: Ebara Corp
Priority date: 2002-12-17
Filing date: 2002-12-17
Publication date: 2009-02-12
Anticipated expiration: 2022-12-17
Also published as: JP2004195334A

Description

【０００１】
【発明の属する技術分野】
本発明は、各種の工場、下水、し尿、畜産業施設等から排出される有機性の廃水又は有機性の廃棄物等を対象として、これ等の廃棄物等を無害化する嫌気性汚泥床処理装置に関し、更に詳しくは、従来の処理装置よりコンパクトで、気・液・固（液）分離部（以下、「ＧＳＳ」とも記す）を多段に有する嫌気性汚泥床処理装置に関する。
【０００２】
【従来の技術】
有機性廃水及び／又は有機性廃棄物の処理方法の一つである嫌気性処理には様々な装置形状
（構成）があり、この処理方法の中で、気体・液体及び固体を分離させる必要がある嫌気性処理装置（以下、「装置」と略記することがある）の例としては、上向流嫌気性汚泥床（以下、「ＵＡＳＢ」とも記す）、膨張汚泥床（以下、「ＥＧＳＢ」とも記す）が挙げられる。これらは、リアクター内にメタン菌などの嫌気性菌をグラニュール状に造粒化することにより、リアクター内のメタン菌濃度を高濃度に維持できるという特徴を持ち、対象原水が高濃度な場合でも効率よく処理出来ることが知られている（特許文献１）。
【０００３】
これらの装置のリアクター内には、気体、液体及び固体を分離する気液固分離装置が必須であり、この形状や構成は様々である。この気液固分離装置をリアクター内へ多段に構成した場合は、その設置水深の影響から各分離ガスを水封させながら捕集する必要があるため、別途に水封槽を要する。この水封槽は、水圧を確保するために各気液固分離装置からリアクター水面までの高さ以上を要し、また、水封槽内の捕集ガス密度を一定以下にする必要もあるためリアクター本体の１／４〜１／２程度の大きな容量が必要である。
【０００４】
また、廃水の性状によっては嫌気性処理の前に酸発酵処理が必要であり、この場合、リアクターの前段へ別途に滞留時問を１〜４時間程度とした酸発酵槽を設置している。そして、前記処理法を具体化した装置では、重クロム酸カリウムを酸化剤として用いて測定したＣＯＤ_Cr（以下、単に「ＣＯＤ」とも記す）の容積負荷が１０〜１５ｋｇ／ｍ³／ｄの廃水、廃棄物であっても、高率よく運転できることが知られている。
【０００５】
【特許文献１】
特開２００２−７９２９１号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、多段化した上向流嫌気性汚泥床法（ＵＡＳＢ）の装置にあっては、なお、以下に記載するような、問題点がある。
（ａ）対象とする原水性状によっては嫌気性処理の前に酸発酵槽が別途に必要となる。
（ｂ）嫌気性処理で発生するガスをリアクター内へ多段に設置した気液固分離装置で分離する場合、設置水深の影響から分離ガスを水封捕集する槽が別途に必要となる。
本発明は、これらの問題点を解消し、酸発酵槽が別途に必要とすることなく、嫌気性処理と酸発酵処理を行い得るようにするとともに、リアクター内に設ける気液固分離装置で分離されたガスを、区画した部分へ容易に導入させるようにして、装置をコンパクト化することを課題とするものである。
【０００７】
【課題を解決するための手段】
本発明は、下記の手段により前記の課題を解決した。
（１）有機性廃水及び／又は有機性廃棄物を嫌気性廃水処理により処理する嫌気性処理装置において、該嫌気性処理装置内を隔壁により内胴と外胴に区画し、内胴と外胴との間の該隔壁に該内胴中央部から底部の間に少なくとも１つ以上の開口を有し、かつ該有機性廃水及び／又は有機性廃棄物の流入部を前記内胴の上部、処理液流出部を該外胴の上部に有し、かつ装置内で発生するガスを外胴及び内胴の気相部に捕集させ、該捕集部にガス排出口を有し、かつ前記隔壁及び / 又は外胴の槽壁に複数取り付けられた下方にのびる邪魔板と前記隔壁及び / 又は外胴の槽壁によって形成された領域であり、該領域の上方が発生ガスの集積部である多段の気体、液体及び固体を分離する気液固分離装置を前記外胴に有し、かつ該気液固分離装置と内胴を結んでおり内胴内に開口して、各該気液固分離装置で分離された気体を前記内胴へ水封させながら導入する水封管を設けたことを特徴とする嫌気性処理装置。
【０００８】
（２）前記嫌気性処理装置において、有機性廃水及び／又は有機性廃棄物を内胴へ導入し、内胴部分を有機性廃棄物の可溶化及び酸発酵を含む、嫌気性処理の前処理装置とすることを特徴とする請求項１に記載の嫌気性処理装置。
【００１０】
【発明の実施の形態】
本発明の実施の形態を、図面を参照して説明するが、本発明の範囲はこれに限定されない。
図１〜図３は、嫌気性処理を実施するのに好ましい本発明の嫌気性処理装置の一形態の概要を例示した図である。
原水２は、原水管１０から流入し、リアクター１内を区画した内胴１５の内側へ投入する。この内胴１５は、流入した原水をリアクター底部２１へ導入する目的と、嫌気性処理の酸発酵を行う処理を兼ね備えている。底部２１へ導入され、酸発酵が行われた廃水は、リアクター１の内胴１５と外胴１６を区画する隔壁１８に内胴１５の中央部より下に少なくとも１つ以上設置する開口２０から外胴１６に入り、上向き流でリアクターの内胴１５と外胴１６を通過し、リアクター１上部の処理水管１１より処理水３を排出する。
【００１１】
嫌気性処理は、この内胴１５と外胴１６に充填したグラニュール状の嫌気性菌により行われ、その結果、有機性廃棄物が分解されガスが発生する。発生ガスは内胴１５と外胴１６とを区画する隔壁１８へ多段に設置する各気液固分離装置１３で分離される。各気液固分離装置１３で分離された分離ガス４は、各気液固分離装置１３と内胴１５を結ぶ水封管１４を通過することで内胴１５へ導入し、気泡１７として上昇し、リアクター１頂部付近のガス流出管１２から系外に排出する。なお、各気液固分離装置１３は、かならずしも前記隔壁１８に設ける必要はなく、外胴１６内に設けておいて、各気液固分離装置１３で分離された分離ガス４を送る水封管１４を内胴１５内に配置するようにすればよい。
【００１２】
また、多段に設置される各気液固分離装置１３の邪魔板は、グラニュールの沈積を防止するため、固定する壁との角度が４５°以下、好ましくは３５°以下とするのがよい。又、嫌気性処理を行う場合、内胴１５と外胴１６の間の液流速は、０．１〜１０ｍ／ｈ、好ましくは、１〜３ｍ／ｈとなるように調節すればよい。
【００１３】
図１、図２及び図３の装置は、各気液固分離装置１３の設置構成に違いがあり、図１は内胴１５へ、図２は内胴１５及び外胴１６へ、図３は外胴１６へ気液固分離装置１３をそれぞれ設置したことを示すが、その段数および内胴１５及び外胴１６への設置構成は目的に応じて、適宜変更してもよく限定されるものではない。リアクター１内における気液固分離装置１３の固定箇所については種々の構造を採用し得るものであり、図１では内胴１５から外胴１６への隔壁１８に固定しており、図２では隔壁１８及び槽壁１９に固定しており、また、図３では槽壁１９に固定しているものである。その他、図４に示すように、隔壁１８及び槽壁１９だけではなく隔壁１８と槽壁１９の中間位置に配置してもよい。なお、装置における内胴１５と外胴１６の配置関係は、二重円筒でも、またその他のどのような構造でもよい。
【００１４】
本発明の対象となる嫌気性処理は、３０℃〜３５℃を至適温度とした中温メタン発酵処理、５０℃〜５５℃を至適温度とした高温メタン発酵処理など、全ての温度範囲の嫌気性処理を対象としている。嫌気性菌からなるグラニュール汚泥を投入し、有機性廃棄物などを含んだ原水をリアクターヘ導入する。更に、原水を処理水の循環液や系外から別に供給する希釈水等により、必要に応じて適宜希釈を行ってもよい。
【００１５】
【実施例】
以下に、実施例を挙げて本発明を更に具体的に説明するが、本発明の範囲はこの実施例により限定されるものではない。
【００１６】
実施例１
図１に示した内胴と外胴の間に内胴の隔壁から気液固分離装置１３（以下、「ＧＳＳ」ともいう）を３個設け、装置側壁と邪魔板との角度（θ）を３５°とした嫌気性処理装置（リアクター）を使用した。
リアクターの断面積は４．５２ｍ²（２．４ｍφ）であり、その内胴部の断面積は０．７８ｍ²であり、高さは１２．８ｍ（容量５３．３８ｍ³）である。またＧＳＳ投影面積は３．３０ｍ²（内胴と外胴の間の断面積の６７．３％）で実験した。原水は、リアクターの原水管１０より流入し、リアクター上部のガス流出管１２より分離ガスを排出する。
【００１７】
本発明においては、上記したように装置内を内胴と外胴に区画することにより、リアクターが酸発酵＋嫌気性処理＋水封捕集の三つの機能を有している。そして、分離されたガスは系外に排出され、精製貯留設備へ送られる。
リアクター内の水温は、３５℃になるように温度制御した。原水には、有機性廃水（ＣＯＤ７０００ｍｇ／リットル）を用いた。通水速度を１．５〜３．０ｍ／ｈに調整し、処理水ＣＯＤ濃度を見ながら、ＣＯＤ負荷量を４０Ｋｇ／ｍ³／ｄまで徐々に上げた。実験経過後、約１２０日目までは略々同じ負荷量で処理できた。
【００１８】
比較例１
比較例として、酸発酵槽、邪魔板の角度と断面積が本発明と同じＧＳＳ部を有するリアクター(嫌気性処理槽)及び水封槽の処理フローからなる従来法の嫌気性処理装置を使用した。この装置では、実施例１と同じ原水は酸発酵槽に導入され、次にリアクターで嫌気性処理が行われる。発生した分離ガスは水封槽に移送され、最後に精製、貯留設備へ送られる。
【００１９】
酸発酵槽、リアクター及び水封槽の装置面積の組み合わせを各種変更して、本発明の実施例１と同じ処理結果が得られる条件の装置面積を検討して、酸発酵槽＝１．９６ｍ²（１．４ｍ幅×１．４ｍ長さ）、リアクター＝３．８ｍ²（２．２ｍφ）及び水封槽＝０．７８５ｍ²（１．０ｍφ）の組み合わせのものを用いた。これは検討によると最小装置面積のものである。その場合、合計装置面積は６．５４５ｍ²となった。
【００２０】
以上の実施例１と比較例１の結果から、本発明の嫌気性処理装置（リアクター）は従来の装置の約三分の二の設置面積で少なくとも同等の処理結果が得られた。また、嫌気性処理装置内を内胴と外胴に区画し内胴中央部から底部の間に少なくとも１つ以上の開口を有する構造とすることにより同一リアクター内で「前処理」、「嫌気性処理」及び「発生ガスの水封・捕集」が可能となり、リアクターのコンパクト化が達成された。
【００２１】
しかも、従来法では酸発酵槽内を混合する攪拌機、リアクターへ移送するポンプ及び制御器が必要であったが、本発明法では内胴の内側で分離したガスと内胴へ導入した廃水がクロスフローとなるため攪拌機が不要であり、また、内胴を酸発酵槽として利用するため移送ポンプ、制御器、移送配管も不要となり、装置のコストを大幅に圧縮できることが判明した。
【００２２】
【発明の効果】
従来の嫌気性処理装置では、酸発酵槽内を混合する攪拌機、リアクターへ移送するポンプ及び制御器が必要であったが、本発明では内胴の内側で分離したガスと内胴へ導入した廃水がクロスフローとなるため攪拌機が不要となり、又、内胴を酸発酵槽として利用するため移送ポンプ、制御器、移送配管も不要となったため、リアクターの大幅なコンパクト化が可能となった。
又、高いＣＯＤ負荷においても、安定した処理を行うことができる嫌気性処理装置を提供することができ、有機物負荷が高くても常時安定した有機物の処理結果が得られた。
【図面の簡単な説明】
【図１】内胴部の隔壁に気液固分離装置１３を設けた本発明の一実施態様を示す嫌気性処理装置の概略説明図である。
【図２】内胴部の隔壁及び外胴部の双方に気液固分離装置１３を設けた本発明の一実施態様を示す嫌気性処理装置の概略説明図である。
【図３】外胴に気液固分離装置１３を設けた本発明の一実施態様を示す嫌気性処理装置の概略説明図である。
【図４】内胴部の隔壁、外胴部の槽壁及び隔壁と槽壁との中間位置に気液固分離装置１３を設けた本発明の一実施態様を示す嫌気性処理装置の概略説明図である。
【符号の説明】
１リアクター
２原水（有機性廃水）
３処理水
４分離ガス
１０原水管
１１処理水管
１２ガス流出管
１３気液固分離装置
１４水封管
１５内胴
１６外胴
１７気泡
１８隔壁
１９槽壁
２０開口
２１底部[0001]
BACKGROUND OF THE INVENTION
The present invention is intended for organic wastewater or organic waste discharged from various factories, sewage, human waste, livestock industry facilities, etc., and anaerobic sludge bed treatment that renders these wastes harmless. More particularly, the present invention relates to an anaerobic sludge bed processing apparatus that is more compact than conventional processing apparatuses and has multiple stages of gas / liquid / solid (liquid) separation units (hereinafter also referred to as “GSS”).
[0002]
[Prior art]
Anaerobic treatment, which is one of the treatment methods for organic wastewater and / or organic waste, has various apparatus shapes (configurations). In this treatment method, it is necessary to separate gas, liquid and solid. Examples of a certain anaerobic treatment apparatus (hereinafter sometimes abbreviated as “apparatus”) include an upflow anaerobic sludge bed (hereinafter also referred to as “UASB”) and an expanded sludge bed (hereinafter referred to as “EGSB”). Note). These have the feature that the concentration of methane bacteria in the reactor can be maintained at a high level by granulating anaerobic bacteria such as methane bacteria in the reactor, even when the target raw water is at a high concentration. It is known that it can process efficiently (patent document 1).
[0003]
In the reactors of these devices, a gas-liquid solid separation device that separates gas, liquid, and solid is indispensable, and its shape and configuration are various. When this gas-liquid solid separation apparatus is configured in multiple stages in the reactor, it is necessary to collect each separation gas while sealing with water due to the influence of the installation water depth, so a separate water-sealed tank is required. This water-sealed tank requires more than the height from each gas-liquid solid separation device to the reactor water surface to secure the water pressure, and it is also necessary to keep the density of collected gas in the water-sealed tank below a certain level. A large capacity of about 1/4 to 1/2 of the reactor body is required.
[0004]
Further, depending on the properties of the wastewater, acid fermentation treatment is required before the anaerobic treatment, and in this case, an acid fermentation tank having a residence time of about 1 to 4 hours is separately installed in the previous stage of the reactor. In the apparatus embodying the treatment method, waste water having a volumetric load of COD _Cr (hereinafter also simply referred to as “COD”) measured using potassium dichromate as an oxidizing agent is 10 to 15 kg / m ³ / d. It is known that even waste can be operated with high efficiency.
[0005]
[Patent Document 1]
JP-A-2002-79291 [0006]
[Problems to be solved by the invention]
However, the upward flow anaerobic sludge bed (UASB) apparatus having multiple stages still has problems as described below.
(A) An acid fermenter is separately required before anaerobic treatment depending on the target raw water state.
(B) When the gas generated in the anaerobic treatment is separated by a gas-liquid solid separation device installed in multiple stages in the reactor, a separate tank for collecting and separating the separated gas is required due to the influence of the installation water depth.
The present invention eliminates these problems, enables an anaerobic treatment and an acid fermentation treatment to be performed without requiring an acid fermentation tank separately, and separates them with a gas-liquid solid separation device provided in the reactor. It is an object of the present invention to make the apparatus compact by easily introducing the generated gas into the partitioned part.
[0007]
[Means for Solving the Problems]
The present invention has solved the above problems by the following means.
(1) In an anaerobic treatment apparatus for treating organic wastewater and / or organic waste by anaerobic wastewater treatment, the anaerobic treatment apparatus is divided into an inner trunk and an outer trunk by a partition, and the inner trunk and the outer trunk The partition between the inner cylinder has at least one opening between the center and the bottom of the inner cylinder, and the inflow part of the organic waste water and / or organic waste is treated at the upper part of the inner cylinder. has a liquid outlet portion in the upper portion of the outer cylinder, and to collect the gas generated in the apparatus in the gas phase portion of the outer cylinder and inner cylinder, have a gas outlet in the collecting portion, and the partition wall And / or a region formed by a plurality of baffle plates extending downwardly attached to the tank wall of the outer shell and the partition wall and / or the tank wall of the outer shell, and the upper part of the region is a multistage where the generated gas is accumulated A gas-liquid solid separation device for separating the gas, liquid and solid in the outer cylinder, and the gas-liquid solid separation device and the inner cylinder Open into cages within the barrel Nde binding, anaerobic treatment apparatus, characterized in that the gas separated in the gas-liquid-solid separation device provided with a water seal tube for introducing while water seal into said cylinder.
[0008]
(2) In the anaerobic treatment apparatus, organic waste water and / or organic waste is introduced into the inner body, and the inner body is pretreated for anaerobic treatment including solubilization of organic waste and acid fermentation. anaerobic treatment apparatus according to claim 1, characterized in that the apparatus.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings, but the scope of the present invention is not limited thereto.
1 to 3 are diagrams illustrating an outline of an embodiment of an anaerobic treatment apparatus of the present invention that is preferable for carrying out an anaerobic treatment.
The raw water 2 flows in from the raw water pipe 10 and is introduced into the inner cylinder 15 that partitions the reactor 1. The inner cylinder 15 has both the purpose of introducing the raw water that has flowed into the reactor bottom 21 and the treatment of anaerobic acid fermentation. Waste water introduced into the bottom 21 and subjected to acid fermentation is removed from an opening 20 provided at least one or more below the central portion of the inner cylinder 15 in the partition wall 18 that partitions the inner cylinder 15 and the outer cylinder 16 of the reactor 1. It enters the cylinder 16, passes through the inner cylinder 15 and the outer cylinder 16 of the reactor in an upward flow, and discharges the treated water 3 from the treated water pipe 11 at the top of the reactor 1.
[0011]
The anaerobic treatment is performed by the granular anaerobic bacteria filled in the inner cylinder 15 and the outer cylinder 16, and as a result, the organic waste is decomposed and gas is generated. The generated gas is separated by each gas-liquid solid separation device 13 installed in multiple stages to the partition wall 18 that partitions the inner cylinder 15 and the outer cylinder 16. The separation gas 4 separated by each gas-liquid solid separation device 13 is introduced into the inner cylinder 15 by passing through a water-sealed tube 14 that connects each gas-liquid solid separation device 13 and the inner cylinder 15, and rises as bubbles 17. Then, the gas is discharged out of the system from the gas outflow pipe 12 near the top of the reactor 1. Each gas-liquid solid separation device 13 is not necessarily provided in the partition wall 18, and is provided in the outer body 16, and a water-sealed tube for sending the separation gas 4 separated by each gas-liquid solid separation device 13. 14 may be arranged in the inner cylinder 15.
[0012]
In addition, the baffle plates of the gas-liquid solid separation devices 13 installed in multiple stages should have an angle of 45 ° or less, preferably 35 ° or less, with the wall to be fixed in order to prevent granule deposition. Further, when anaerobic treatment is performed, the liquid flow rate between the inner cylinder 15 and the outer cylinder 16 may be adjusted to 0.1 to 10 m / h, preferably 1 to 3 m / h.
[0013]
1, 2, and 3 are different in the installation configuration of each gas-liquid solid separation device 13, FIG. 1 shows the inner cylinder 15, FIG. 2 shows the inner cylinder 15 and the outer cylinder 16, and FIG. It shows that the gas-liquid-solid separation device 13 is installed on the outer cylinder 16, but the number of stages and the installation configuration on the inner cylinder 15 and the outer cylinder 16 may be appropriately changed depending on the purpose and are not limited. Absent. Various structures can be adopted for fixing the gas-liquid solid separation device 13 in the reactor 1. In FIG. 1, the structure is fixed to the partition wall 18 from the inner cylinder 15 to the outer cylinder 16. 18 and the tank wall 19 are fixed to the tank wall 19 in FIG. In addition, as shown in FIG. 4, not only the partition wall 18 and the tank wall 19 but also an intermediate position between the partition wall 18 and the tank wall 19 may be used. The arrangement relationship between the inner cylinder 15 and the outer cylinder 16 in the apparatus may be a double cylinder or any other structure.
[0014]
The anaerobic treatment that is the subject of the present invention is an anaerobic treatment in all temperature ranges, such as a medium temperature methane fermentation treatment with an optimum temperature of 30 ° C. to 35 ° C., and a high temperature methane fermentation treatment with an optimum temperature of 50 ° C. to 55 ° C. It is intended for sex processing. Granule sludge composed of anaerobic bacteria is introduced, and raw water containing organic waste is introduced into the reactor. Furthermore, the raw water may be appropriately diluted as necessary with a circulating solution of treated water, dilution water supplied separately from outside the system, or the like.
[0015]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples. However, the scope of the present invention is not limited to the examples.
[0016]
Example 1
Three gas-liquid solid separation devices 13 (hereinafter also referred to as “GSS”) are provided from the inner cylinder partition between the inner cylinder and the outer cylinder shown in FIG. 1, and the angle (θ) between the apparatus side wall and the baffle plate is set. An anaerobic treatment apparatus (reactor) at 35 ° was used.
The cross-sectional area of the reactor is 4.52 m ² (2.4 mφ), the cross-sectional area of its inner trunk is 0.78 m ² , and the height is 12.8 m (capacity 53.38 m ³ ). The GSS projection area was 3.30 m ² (67.3% of the cross-sectional area between the inner cylinder and the outer cylinder). The raw water flows in from the raw water pipe 10 of the reactor, and the separation gas is discharged from the gas outflow pipe 12 at the top of the reactor.
[0017]
In the present invention, the reactor has three functions of acid fermentation + anaerobic treatment + water seal collection by partitioning the inside of the apparatus into an inner cylinder and an outer cylinder as described above. The separated gas is discharged out of the system and sent to the refined storage facility.
The water temperature in the reactor was controlled to 35 ° C. Organic waste water (COD 7000 mg / liter) was used as raw water. The water flow rate was adjusted to 1.5 to 3.0 m / h, and the COD load was gradually increased to 40 kg / m ³ / d while observing the treated water COD concentration. After the experiment, it was possible to process with substantially the same load until about 120 days.
[0018]
Comparative Example 1
As a comparative example, an acid fermentation tank, a reactor (anaerobic treatment tank) having the same GSS part as that of the present invention in the angle and cross-sectional area of the baffle plate, and a conventional anaerobic treatment apparatus comprising a processing flow of a water-sealed tank were used. . In this apparatus, the same raw water as in Example 1 is introduced into the acid fermenter, and then anaerobic treatment is performed in the reactor. The generated separation gas is transferred to a water-sealed tank and finally sent to a purification and storage facility.
[0019]
Various combinations of the device areas of the acid fermenter, reactor, and water-sealed tank were changed, and the device area under the condition that the same treatment result as that of Example 1 of the present invention was obtained was examined. Acid fermenter = 1.96 m ² (1.4 m wide × 1.4 m in length), it was used in combination of the reactor = 3.8m ² (2.2mφ) and Mizufuso = 0.785m ² (1.0mφ). This is the smallest device area according to the study. In that case, the total device area was 6.545 m ² .
[0020]
From the results of Example 1 and Comparative Example 1 described above, the anaerobic treatment apparatus (reactor) of the present invention obtained at least the same treatment result with about two-thirds the installation area of the conventional apparatus. In addition, the anaerobic treatment device is divided into an inner cylinder and an outer cylinder, and a structure having at least one opening between the center and the bottom of the inner cylinder is used to perform “pretreatment” and “anaerobic” in the same reactor. Treatment and water sealing and collection of generated gas became possible, and the reactor was made compact.
[0021]
Moreover, in the conventional method, a stirrer for mixing the inside of the acid fermenter, a pump for transferring to the reactor, and a controller are required, but in the method of the present invention, the gas separated inside the inner cylinder and the waste water introduced into the inner cylinder are crossed. Since it becomes a flow, a stirrer is unnecessary, and since the inner drum is used as an acid fermentation tank, a transfer pump, a controller and a transfer pipe are also unnecessary, and it has been found that the cost of the apparatus can be greatly reduced.
[0022]
【The invention's effect】
In the conventional anaerobic treatment apparatus, a stirrer for mixing the inside of the acid fermentation tank, a pump for transferring to the reactor, and a controller were required. In the present invention, the gas separated inside the inner cylinder and the waste water introduced into the inner cylinder Since the cross flow, the agitator becomes unnecessary, and since the inner cylinder is used as an acid fermentation tank, the transfer pump, controller, and transfer piping are also unnecessary, so that the reactor can be greatly downsized.
In addition, an anaerobic treatment apparatus capable of performing stable treatment even at a high COD load can be provided, and a stable treatment result of organic matter can be obtained even when the load on organic matter is high.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view of an anaerobic treatment apparatus showing an embodiment of the present invention in which a gas-liquid solid separation device 13 is provided in a partition wall of an inner trunk portion.
FIG. 2 is a schematic explanatory view of an anaerobic treatment apparatus showing an embodiment of the present invention in which a gas-liquid solid separation device 13 is provided in both a partition wall and an outer trunk portion of an inner trunk portion.
FIG. 3 is a schematic explanatory view of an anaerobic treatment apparatus showing an embodiment of the present invention in which a gas-liquid solid separation device 13 is provided on an outer cylinder.
FIG. 4 is a schematic illustration of an anaerobic treatment apparatus showing an embodiment of the present invention in which a gas-liquid solid separation device 13 is provided at an intermediate position between a partition wall of an inner trunk part, a tank wall of an outer trunk part, and a partition wall and a tank wall. FIG.
[Explanation of symbols]
1 Reactor 2 Raw water (organic wastewater)
3 treated water 4 separation gas 10 raw water pipe 11 treated water pipe 12 gas outflow pipe 13 gas-liquid solid separation device 14 water seal pipe 15 inner cylinder 16 outer trunk 17 bubble 18 partition wall 19 tank wall 20 opening 21 bottom

Claims

An anaerobic treatment device for treating organic wastewater and / or organic waste by anaerobic wastewater treatment, wherein the anaerobic treatment device is divided into an inner trunk and an outer trunk by a partition, and between the inner trunk and the outer trunk The partition wall has at least one or more openings between the center portion and the bottom portion of the inner cylinder, and the inflow portion of the organic waste water and / or organic waste is provided at the upper portion of the inner cylinder, the outflow portion of the processing liquid. the have the top of the outer cylinder, and to collect the gas generated in the apparatus in the gas phase portion of the outer cylinder and inner cylinder, have a gas outlet in the collecting portion, and the partition wall and / or A multistage gas that is a region formed by a baffle plate extending downward and a partition wall and / or a tank wall of the outer trunk , which are attached to the tank wall of the outer trunk , and wherein the upper part of the region is an accumulation portion of the generated gas, the gas-liquid-solid separation device for separating the liquid and solid have in the outer cylinder, and N forming a gas-liquid-solid separation device and the inner cylinder Opens into the cage in the body, anaerobic treatment apparatus, characterized in that the gas separated in the gas-liquid-solid separation device provided with a water seal tube for introducing while water seal into said cylinder.

In the anaerobic treatment apparatus, organic waste water and / or organic waste is introduced into the inner trunk, and the inner trunk portion is used as a pretreatment apparatus for anaerobic treatment including solubilization of organic waste and acid fermentation. The anaerobic processing apparatus according to claim 1.