JPH06142692A - Method and device for purifying organic sewage - Google Patents
Method and device for purifying organic sewageInfo
- Publication number
- JPH06142692A JPH06142692A JP4315512A JP31551292A JPH06142692A JP H06142692 A JPH06142692 A JP H06142692A JP 4315512 A JP4315512 A JP 4315512A JP 31551292 A JP31551292 A JP 31551292A JP H06142692 A JPH06142692 A JP H06142692A
- Authority
- JP
- Japan
- Prior art keywords
- fixed bed
- raw water
- bed
- water
- filled
- 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.)
- Granted
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000005406 washing Methods 0.000 claims abstract description 30
- 238000000746 purification Methods 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 15
- 239000008187 granular material Substances 0.000 claims description 14
- 239000002351 wastewater Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000005273 aeration Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 13
- 239000007787 solid Substances 0.000 abstract description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007068 beta-elimination reaction Methods 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 19
- 238000012545 processing Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 241000894006 Bacteria Species 0.000 description 11
- 229920005830 Polyurethane Foam Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000001546 nitrifying effect Effects 0.000 description 6
- 239000011496 polyurethane foam Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アンモニア性窒素を含
む有機性汚水を生物学的に硝化脱窒素し、高度に浄化す
る浄化方法および浄化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification method and a purification apparatus for biologically nitrifying and denitrifying organic wastewater containing ammoniacal nitrogen to a high degree.
【０００２】[0002]
【従来の技術】従来より図３に示すように、アンスラサ
イトなどの粒状鉱物のろ材を充填した浸漬固定ろ床を有
する処理槽を２槽使用し、第１の処理槽にはろ材に脱窒
素菌を保持せしめて脱窒素ろ床２１とし、また第２の処
理槽にはろ材に硝化菌を保持せしめて硝化ろ床２２と
し、これら脱窒素ろ床２１と硝化ろ床２２を直列的に配
置し、第１の脱窒素ろ床２１に原水供給管２０から原水
を流入し下向流で通水して得た脱窒素処理水を循環用配
管３２を経て、第２の処理槽の硝化ろ床２２に上部から
流入し下向流で通水しながら該ろ床２２の下部の散気管
２３から空気を吹き込んで好気的に硝化処理し、その流
出水（硝化液と呼ぶ）を一旦処理水槽２４に貯留した
後、ポンプ３１によって脱窒素ろ床２１に循環する、２
基の浸漬固定ろ床を使用する生物学的硝化脱窒素方法は
知られている。2. Description of the Related Art Conventionally, as shown in FIG. 3, two treatment tanks having an immersion fixed filter bed filled with a filter material of granular mineral such as anthracite are used, and the first treatment tank is denitrified as a filter material. Bacteria are retained to form a denitrification filter bed 21, and nitrifying bacteria are retained in a filter medium in the second treatment tank to form a nitrification filter bed 22. These denitrification filter bed 21 and nitrification filter bed 22 are arranged in series. Then, the denitrification treated water obtained by inflowing the raw water from the raw water supply pipe 20 into the first denitrification filter bed 21 and passing it through in a downward flow is passed through the circulation pipe 32 to the nitrification filter of the second treatment tank. The air is blown into the floor 22 from the upper part while flowing in the downward flow through the diffuser pipe 23 at the lower part of the filter bed 22 to aerobically aeritize nitrification, and the outflow water (called nitrification solution) is once treated. After being stored in the water tank 24, it is circulated to the denitrification filter bed 21 by the pump 31.
Biological nitrification and denitrification processes using submerged fixed filter beds are known.
【０００３】しかし、この従来技術は次のような欠点が
あり、さらに優れた技術の開発が切望されている。 脱窒素ろ床２１に、ＳＳを含んだ有機汚水が流入す
るが、ろ床の目詰まりの進行が早く、最初に沈澱池を設
け、ＳＳ負荷を軽減しているがなおかつ頻繁にろ床洗浄
を行わなければならない。その結果、洗浄用水の消費
量、洗浄排水の発生量が多い。 脱窒素ろ床２１と硝化ろ床２２を別々に洗浄しなけ
ればならないという不便さがある。その上ますます洗浄
排水の発生量が多くなる。 硝化反応速度、脱窒素反応速度が小さいので、反応
槽が大きく、建設コスト、設置スペースがかさむ。 ＣＯＤ、色度の除去率が極めて低い。 このため、さらに高効率でかつ安定した硝化脱窒素処理
およびＣＯＤ、色度の除去ができるコンパクトな装置が
要望されている。However, this conventional technique has the following drawbacks, and the development of a more excellent technique has been earnestly desired. Although the organic wastewater containing SS flows into the denitrification filter bed 21, the filter bed is rapidly clogged, and a sedimentation basin is first installed to reduce the SS load, but the filter bed is washed frequently. It must be made. As a result, the amount of washing water consumed and the amount of washing wastewater generated are large. There is an inconvenience that the denitrification filter bed 21 and the nitrification filter bed 22 must be separately washed. In addition, the amount of cleaning wastewater generated will increase. Since the nitrification reaction rate and denitrification reaction rate are small, the reaction tank is large, and construction cost and installation space are large. The removal rate of COD and chromaticity is extremely low. Therefore, there is a demand for a compact device which can perform nitrification denitrification treatment and COD and chromaticity removal with higher efficiency and stability.
【０００４】[0004]
【発明が解決しようとする課題】本発明の課題は、上記
欠点を解消できる新技術を提供するものである。すなわ
ち、 １）単一槽でＳＳ、ＢＯＤ、さらに硝化脱窒素、ＣＯ
Ｄ、色度除去を行えるようにする。 ２）ろ床の閉塞を減少させ、ろ床の洗浄頻度を著しく少
なくする。 ３）硝化反応、脱窒素反応速度を顕著に向上させる。 ４）最初に設ける沈殿池を不要にする。 以上の機能を有するコンパクトな装置の提供を課題とす
る。SUMMARY OF THE INVENTION An object of the present invention is to provide a new technique capable of solving the above drawbacks. That is, 1) SS, BOD, nitrification and denitrification, CO in a single tank
D, so that chromaticity can be removed. 2) Reduce filter bed blockage and significantly reduce filter bed cleaning frequency. 3) Remarkably improve the nitrification reaction and denitrification reaction rate. 4) The first settling tank is unnecessary. An object is to provide a compact device having the above functions.
【０００５】[0005]
【課題を解決するための手段】上記課題は下記上向流式
生物学的処理装置の発明によって達成される。すなわ
ち、 １）アンモニア性窒素を含む汚水を、立体的網目構造を
もつ粒状物を充填した固定床Ａに通水して、生物学的脱
窒素すると共に汚水に含まれるＳＳを除去した後、好気
性の条件下で粒状活性炭を充填した固定床Ｂに通水し
て、生物学的硝化とＣＯＤ除去を行い、該固定床Ｂから
の流出水の一部を前記固定床Ａに循環せしめることを特
徴とする有機性汚水の浄化方法。The above object can be achieved by the invention of an upflow biological treatment apparatus described below. That is, 1) Sewage containing ammoniacal nitrogen is passed through a fixed bed A filled with a granular material having a three-dimensional network structure for biological denitrification and removal of SS contained in the wastewater. Water is passed through the fixed bed B filled with granular activated carbon under aerobic conditions to perform biological nitrification and COD removal, and a part of the outflow water from the fixed bed B is circulated to the fixed bed A. A characteristic method for purifying organic sewage.
【０００６】２）アンモニア性窒素を含む汚水を、生物
学的脱窒素すると共にＳＳを除去する立体的網目構造を
もつ粒状物を充填した固定床Ａと、固定床Ａからの流出
水を好気性の条件下で生物学的硝化とＣＯＤ除去を行う
粒状活性炭を充填した固定床Ｂを有し、該固定床Ｂから
の流出水の一部を前記固定床Ａに循環せしめるように構
成すると共に、固定床Ｂの下方部に空洗部材を設けたこ
とを特徴とする有機性汚水の浄化装置。2) A fixed bed A filled with granular material having a three-dimensional network structure for biologically denitrifying sewage containing ammoniacal nitrogen and removing SS, and the outflow water from the fixed bed A are aerobic. In addition to having a fixed bed B packed with granular activated carbon for biological nitrification and COD removal under the conditions of (1), a part of the water discharged from the fixed bed B is circulated to the fixed bed A, and An organic wastewater purification apparatus, characterized in that an air washing member is provided below the fixed bed B.
【０００７】好ましくは、 ３）隔壁を介して上流側に、立体的網目構造をもつ粒状
物を充填し生物学的脱窒素すると共にＳＳを除去する固
定床Ａ、下流側に粒状活性炭を充填し酸素含有気体の散
気部材を備えて生物学的硝化とＣＯＤ除去を行う固定床
Ｂを配置し、アンモニア性窒素を含む汚水を上向流で固
定床Ａを通した後、隔壁を越して下向流で固定床Ｂを通
すように構成すると共に、固定床Ｂからの流出水の一部
を前記固定床Ａに循環させる手段を設けてなる有機性汚
水の浄化装置である。3) Preferably, 3) a fixed bed A for packing the granular material having a three-dimensional network structure to biologically denitrify and removing SS through the partition wall, and packing a granular activated carbon for the downstream side. A fixed bed B for providing biological nitrification and COD removal is provided with an oxygen-containing gas diffusing member, and sewage containing ammoniacal nitrogen is passed through the fixed bed A in an upward flow. This is a device for purifying organic sewage, which is configured so as to pass through the fixed bed B in a countercurrent and which is provided with means for circulating a part of the outflow water from the fixed bed B to the fixed bed A.
【０００８】単一槽でＳＳ、ＢＯＤ、さらに硝化脱窒
素、ＣＯＤ、色度除去を行えるようにする処理槽の構成
としては、単一処理槽内にそれぞれ機能の異なる固定床
Ａおよび固定床Ｂの２種の固定床を区画して設け、例え
ば固定床Ａを生物学的な脱窒素と原水ＳＳのろ過を行う
領域とし、固定床Ｂを生物学的な硝化とＳＳの高度なろ
過とＣＯＤ、色度除去を行う領域とすることにより達成
できる。ここで上記異なった機能の２種の固定床を処理
槽内に設置する仕方としては、（１）単一処理槽内に上
下に区画した領域を設けて、それぞれに固定床Ａと固定
床Ｂを配備する方法と、（２）単一処理槽内に隔壁を設
けて、左右に区画した領域を設けて、例えば左側に固定
床Ａを配備し、右側に固定床Ｂを配備する方法がとり得
る。また（１）の上下に区画した領域を設ける場合、固
定床Ａを上下いずれに設置してもよいが、原水は最初固
定床Ａに通水して生物学的な脱窒素と原水ＳＳのろ過を
行う。As a constitution of a treatment tank which enables SS, BOD, nitrification denitrification, COD and chromaticity removal in a single tank, a fixed bed A and a fixed bed B having different functions are provided in the single treatment tank. The fixed bed A is defined as a region for biological denitrification and filtration of raw water SS, and the fixed bed B is used for biological nitrification and advanced SS filtration and COD. It can be achieved by setting the area for chromaticity removal. Here, as a method of installing two types of fixed beds having different functions in the processing tank, (1) a vertically divided area is provided in a single processing tank, and a fixed bed A and a fixed bed B are provided in each area. And (2) a partition wall is provided in a single processing tank to provide left and right areas, for example, a fixed bed A is provided on the left side and a fixed bed B is provided on the right side. obtain. In addition, when the area divided into the upper part and the lower part of (1) is provided, the fixed bed A may be installed either above or below, but the raw water is first passed through the fixed bed A to biologically denitrify and filter the raw water SS. I do.
【０００９】本発明の具体例を図１と図２に示し、図を
参照しながら本発明の具体的な構成について説明する。
しかしながら、本発明は以下の説明によって制限される
ものではない。Specific examples of the present invention are shown in FIGS. 1 and 2, and a specific configuration of the present invention will be described with reference to the drawings.
However, the present invention is not limited by the following description.
【００１０】図１に示す単一処理槽では、処理槽１中段
に多孔部材６を張設し、下部を固定床Ａとし、上部を固
定床Ｂとする場合を示した。固定床Ａと固定床Ｂとの間
にろ材が充填されていない空間部を有してもよい。固定
床Ａには立体的網目構造をもつ粒状物を充填し、生物学
的な脱窒素と原水ＳＳのろ過を行う。固定床Ｂには粒状
活性炭を充填し、生物学的な硝化とＳＳの高度なろ過と
ＣＯＤ、色度除去を行う。In the single processing tank shown in FIG. 1, the porous member 6 is stretched in the middle stage of the processing tank 1, the lower part is the fixed bed A, and the upper part is the fixed bed B. A space not filled with the filter medium may be provided between the fixed bed A and the fixed bed B. The fixed bed A is packed with particles having a three-dimensional network structure, and biological denitrification and filtration of raw water SS are performed. The fixed bed B is packed with granular activated carbon for biological nitrification, advanced SS filtration, COD, and chromaticity removal.
【００１１】固定床Ａの上限を区画する多孔部材６の上
方に、固定床Ｂに酸素含有ガスを供給する散気管９と同
じ平面位置に、固定床Ｂに充填する粒状活性炭が脱落し
ない細かい格子目の支持部材５を張設して固定床Ｂの支
持床とし、散気管９を通って酸素含有ガス供給源１２よ
りガスを供給して固定床Ｂ内で粒状活性炭を被処理水と
充分混合する。固定床Ｂの上部には多孔部材４を張設す
るか、または粒状固体の層を設けて粒状活性炭をの流出
を抑え、清澄な処理水を流出させる。。Above the porous member 6 which defines the upper limit of the fixed bed A, at the same plane position as the diffuser pipe 9 for supplying the oxygen-containing gas to the fixed bed B, a fine grid in which the granular activated carbon filling the fixed bed B does not drop off An eye support member 5 is stretched to form a support bed for the fixed bed B, and a gas is supplied from an oxygen-containing gas supply source 12 through an air diffuser 9 to thoroughly mix the granular activated carbon with the water to be treated in the fixed bed B. To do. A porous member 4 is stretched over the fixed bed B, or a layer of granular solid is provided to suppress the outflow of granular activated carbon, and clear treated water is allowed to flow out. .
【００１２】下水などアンモニア性窒素を含む有機性汚
水（以下原水という）は原水供給管２を通って処理槽１
の下部より供給され、循環路３からの硝化循環水と共に
固定床Ａ内に上向流で通水する。固定床Ａの下部には洗
浄時空洗用の空気をブロワー１３から空気を供給する空
洗部材１０が設けられている。 処理槽１の最上部に
は、処理水を排水する排水管７および循環ポンプ１１と
弁を有する循環路３を備えている。固定床Ａと固定床Ｂ
との間には洗浄排水を排出する弁を備えた洗浄排水管８
が設けられ、ろ材がそこから流出しないように多孔性部
材１７が張設してある。また、固定床Ａと固定床Ｂとを
区画している多孔部材６、上部多孔部材４、固定床Ａお
よび固定床Ｂの支持部材５および１４、およびドレーン
排出部の多孔部材１７などはネット、多孔板、グレーチ
ング、格子などの多孔通水部材で構成されている。以上
が上下に区画された様式の本発明の処理槽の構成であ
る。Organic wastewater containing ammonia nitrogen such as sewage (hereinafter referred to as raw water) passes through a raw water supply pipe 2 and a treatment tank 1
Is supplied from the lower part of the above, and flows through the fixed bed A in an upward flow together with the nitrifying circulating water from the circulation path 3. Below the fixed bed A, an air washing member 10 for supplying air for washing with air from a blower 13 is provided. At the uppermost part of the treatment tank 1, a drainage pipe 7 for draining the treated water, a circulation pump 11 and a circulation passage 3 having a valve are provided. Fixed bed A and fixed bed B
Cleaning drain 8 provided with a valve for discharging cleaning drain between
Is provided and the porous member 17 is stretched so that the filter medium does not flow out therefrom. Further, the porous member 6 partitioning the fixed bed A and the fixed bed B, the upper porous member 4, the support members 5 and 14 of the fixed bed A and the fixed bed B, the porous member 17 of the drain discharge part, and the like are nets, It is composed of a porous water-permeable member such as a porous plate, a grating, and a lattice. The above is the configuration of the processing tank of the present invention in the form of being divided into upper and lower parts.
【００１３】図２に示す単一処理槽では、上流側（図左
側）に立体的網目構造をもつ粒状物を充填した充填層か
らなる固定床Ａと隔壁Ｃを隔てて下流側に粒状活性炭を
充填した充填層からなる固定床Ｂが設けられている。固
定床Ａは原水の生物学的な脱窒素とＳＳのろ過を行う領
域であり、固定床Ｂは生物学的な硝化とＳＳの高度なろ
過とＣＯＤ、色度除去を行う領域である。In the single treatment tank shown in FIG. 2, a fixed bed A composed of a packed bed filled with granular material having a three-dimensional network structure on the upstream side (left side in the figure) and a partition wall C are provided, and granular activated carbon is provided on the downstream side. A fixed bed B consisting of packed beds is provided. Fixed bed A is an area for biological denitrification of raw water and SS filtration, and fixed bed B is an area for biological nitrification, advanced SS filtration, COD, and chromaticity removal.
【００１４】原水は原水供給管２を経て処理槽１の固定
床Ａに流入し、固定床Ａを上向流として通ってその上部
の越流堰液１５から固定床Ｂに入り下向流として通水
し、固定床Ｂの下部で処理水流出路１６に入り、これを
上昇して処理水流出管７から流出する。また、処理水の
一部は硝化循環水として循環ポンプ１１により循環路３
を通って原水供給管２に入り、原水と共に固定床Ａに流
入するRaw water flows into the fixed bed A of the treatment tank 1 through the raw water supply pipe 2, passes through the fixed bed A as an upward flow, and then enters the fixed bed B from the overflow weir solution 15 at the upper part thereof to make a downward flow. After passing water, it enters the treated water outflow passage 16 at the lower part of the fixed bed B, rises up and flows out from the treated water outflow pipe 7. In addition, a part of the treated water is used as nitrification circulating water by the circulation pump 11 and the circulation path 3
Through the raw water supply pipe 2 and flows into the fixed bed A together with the raw water.
【００１５】処理槽１の上部には、固定床Ａの上部を覆
って固定床Ａの充填ろ材の流出を防止するための多孔性
部材６が、また固定床Ａの下部および固定床Ｂの下部に
はそれぞれ充填ろ材の落下を防止するための支持床１４
および５が張設されている。このうち固定床Ｂの底部に
張設される支持床５は、粒径が細かい粒状活性炭を支持
するので細かい砂利層が好ましく、固定床Ｂの下部に設
置する酸素含有ガス供給用の散気部材９はこの砂利層内
に設置するのが好ましい。A porous member 6 for covering the upper part of the fixed bed A to prevent the filling filter medium from flowing out of the fixed bed A is provided at the upper part of the processing tank 1, and the lower part of the fixed bed A and the lower part of the fixed bed B are provided. Each of them has a supporting floor 14 for preventing the fall of the filling filter medium.
And 5 are stretched. Of these, the support bed 5 stretched over the bottom of the fixed bed B is preferably a fine gravel layer because it supports granular activated carbon with a small particle size, and an air diffusion member for supplying oxygen-containing gas that is installed below the fixed bed B is used. 9 is preferably installed in this gravel layer.
【００１６】上記散気部材９からは酸素含有ガス供給源
１２より固定床Ｂ内に酸素含有ガスを供給して、粒状活
性炭が被処理水と充分混合するように攪乱させる。固定
床Ｂの上部には多孔部材４を張設して粒状活性炭をの流
出を抑え、清澄な処理水を流出させる。また固定床Ａの
下部には空洗するための空洗部材１０が配備され、固定
床Ａの洗浄の際散気部材１０を経てブロア１３から空気
を供給する。以上が隔壁Ｃによって左右に区画された様
式の本発明の処理槽の構成である。An oxygen-containing gas is supplied from the gas diffusion member 9 into the fixed bed B from the oxygen-containing gas supply source 12 to disturb the granular activated carbon so as to be sufficiently mixed with the water to be treated. A porous member 4 is stretched above the fixed bed B to suppress the outflow of granular activated carbon and to allow clear treated water to flow out. An air-cleaning member 10 for air-cleaning is provided below the fixed bed A, and when cleaning the fixed bed A, air is supplied from the blower 13 via the air diffusing member 10. The above is the configuration of the processing tank of the present invention in a mode in which it is divided into the left and right by the partition wall C.
【００１７】上記図１および図２に示した固定床Ａに充
填するろ材を構成する立体的網目構造をもつ粒状物は、
表面から内部にかけて連続した穴を持つように形成さ
れ、公知のものを使用して公知の発泡法等により製造で
きる。粒状物の素材としては上記発泡法に適性を有する
ものならば特に制限されないが、中でも素材自体に適度
な弾性と強度とを有するウレタン樹脂等が好ましい。ろ
材は例えば、ポリウレタンフォーム等の多孔性粒状物を
所望の形状、サイズに切断して使用する。The granular material having a three-dimensional network structure which constitutes the filter medium packed in the fixed bed A shown in FIGS.
It is formed so as to have continuous holes from the surface to the inside, and can be manufactured by a known foaming method using a known material. The granular material is not particularly limited as long as it is suitable for the foaming method, but among them, a urethane resin having appropriate elasticity and strength for the material itself is preferable. As the filter medium, for example, a porous granular material such as polyurethane foam is cut into a desired shape and size before use.
【００１８】例えば、そのサイズは１０〜３０ｍｍ、好
ましくは１５〜２０ｍｍであり、形状は角形、球状、そ
の他種々の形状がとれるが、角形が好ましい。その素材
の比重は、通常１．０〜１．２程度が好ましい。また、
空隙率は、９０％以上が好ましい。気孔径、即ち、孔径
は、０．１〜６ｍｍ、好ましくは２〜４ｍｍの範囲から
選択することが望ましい。また、１ｃｍ長さ当たりの孔
の数は、５〜２０個が好ましい。また、固定床Ｂの粒状
活性炭は粒径２〜３ｍｍが適している。For example, the size thereof is 10 to 30 mm, preferably 15 to 20 mm, and various shapes such as a square shape, a spherical shape and the like can be taken, but the square shape is preferable. The specific gravity of the material is usually preferably about 1.0 to 1.2. Also,
The porosity is preferably 90% or more. It is desirable that the pore diameter, that is, the pore diameter is selected from the range of 0.1 to 6 mm, preferably 2 to 4 mm. The number of holes per 1 cm length is preferably 5 to 20. Further, the granular activated carbon of the fixed bed B preferably has a particle size of 2 to 3 mm.
【００１９】（作用）以下に本発明の作用を図１および
図２を用いて説明する。原水は処理槽１の下部から固定
床Ａに流入し、硝化循環水と共に固定床Ａ内を上向流と
して通水する。固定床Ａに充填されている立体的網目構
造をもつ粒状物からなるろ材にはその網目構造内に１５
０００〜１８０００ｍｇ／リットル（実測値）もの高濃
度の脱窒素菌が固定化されているため、原水中のＢＯＤ
を用いて硝化循環水中のＮＯX−Ｎ（硝酸性窒素）をＮ
2 ガスに還元する。この脱窒素菌が行う反応は次の式で
表される。 なお、散気部材１０から少量の空気を常時吐出して好気
的脱窒素を行ってもよく、生成Ｎ2 ガスを追い出し易く
なることからも好気的脱窒素法の方が好適である。(Operation) The operation of the present invention will be described below with reference to FIGS. 1 and 2. Raw water flows into the fixed bed A from the lower part of the treatment tank 1 and passes through the fixed bed A as an upward flow together with the nitrifying circulating water. The filter medium made of granular material having a three-dimensional mesh structure packed in the fixed bed A has 15 meshes in the mesh structure.
000 to 18,000 mg / liter (measured value) As high concentration of denitrifying bacteria is immobilized, BOD in raw water
Nitrification circulating water NO X -N (the nitrate nitrogen) N with
Reduce to 2 gas. The reaction performed by this denitrifying bacterium is represented by the following formula. Note that a small amount of air may be constantly discharged from the air diffuser 10 to perform aerobic denitrification, and the aerobic denitrification method is more preferable because it is easy to expel the generated N 2 gas.
【００２０】固定床Ａを構成する立体網目状の粒状物か
らなるろ材はＳＳのろ過性能にも優れているため、固定
床Ａ内を通過することによって原水中のＳＳがろ過除去
され、固定床Ａからの流出水のＳＳは通常５ｍｇ／リッ
トル以下に低下する。なお、立体的網目状の粒状物に上
記ポリウレタンフォーム粒状物を、特に好ましくは比重
が１．１〜１．２程度であるポリウレタンフォーム粒状
物を用いると、脱窒素反応によって発生するＮ2 ガスと
ＣＯ2 ガス気泡がポリウレタンフォームの網目構造に捕
捉される結果、見掛け比重が１．０以下になり、固定床
Ａは浮上した状態の充填層として多孔部材６の下部に形
成される。Since the filter medium composed of a three-dimensional mesh-like granular material constituting the fixed bed A is excellent in the filtration performance of SS, SS in the raw water is filtered and removed by passing through the fixed bed A, and the fixed bed is fixed. The SS of the effluent from A usually drops below 5 mg / liter. When the above-mentioned polyurethane foam granules are used as the three-dimensional mesh granules, and particularly preferably the polyurethane foam granules having a specific gravity of about 1.1 to 1.2 are used, N 2 gas generated by the denitrification reaction is generated. As a result of the CO 2 gas bubbles being captured by the polyurethane foam network structure, the apparent specific gravity becomes 1.0 or less, and the fixed bed A is formed below the porous member 6 as a floating packed layer.
【００２１】しかして、原水中のＢＯＤ、ＳＳおよび循
環硝化水中のＮＯX −Ｎの大部分が除去された固定床Ａ
からの流出水は、生物学的硝化反応が進行する固定床Ｂ
に進入して行く。固定床Ｂを構成する粒状活性炭には、
その表面に硝化菌が高濃度に固定化されているので、原
水中のＮＨ3 −Ｎが の反応によって高速度で硝化され、ＣＯＤ、色度も活性
炭と活性炭付着生物の作用によって除去され、ＳＳもさ
らにろ過除去され、極めて清澄な処理水となって処理水
流出管７から系外に流出する。なお、本発明において活
性炭は一度充填すれば、人為的な再生は不要で、永久的
に使用できる。Fixed bed A from which most of BOD and SS in raw water and NO X -N in circulating nitrification water was removed
Effluent from the fixed bed B where biological nitrification reaction proceeds
Go into. For the granular activated carbon constituting the fixed bed B,
Since nitrifying bacteria are immobilized on the surface in high concentration, NH 3 -N in raw water is Is nitrified at high speed by the reaction of CO2, COD and chromaticity are also removed by the action of activated carbon and organisms adhering to activated carbon, and SS is also filtered out, resulting in extremely clear treated water flowing out of the treated water outflow pipe 7 to the outside of the system. To do. In the present invention, once activated carbon is filled, it can be used permanently without artificial regeneration.
【００２２】本発明は 固定床Ａに充填するろ材として、立体的網目状の粒
状物からなるろ材を特定して用い、この特定ろ材に脱窒
素菌などを従来より著しく高濃度（４〜５倍）に固定す
ることおよび、 このような（特定の）脱窒素部Ａのあとに、粒状活
性炭の固定床Ｂを設け、硝化とＣＯＤ除去を進行させる
ことが重要なポイントである。特にの構成は重要であ
り、この構成によって原水や循環硝化液中の溶存酸素濃
度が高くても、問題なく固定床Ａ内で脱窒素反応が進
む。なぜなら、立体網目状の粒状固体からなるろ材の内
部には溶存酸素が拡散し難いので、ろ材の内部でＮＯX
−Ｎが脱窒素反応が効果的に進む。また立体的網目状の
粒状物の充填された固定床ＡはＳＳの捕捉容量が大きい
ので、目詰まりし難く、固定床Ａの洗浄頻度が少なくて
済む。In the present invention, a filter medium composed of three-dimensional mesh-like particles is specified and used as the filter medium to be packed in the fixed bed A, and the denitrifying bacteria and the like have a significantly higher concentration (4 to 5 times) than the conventional filter medium. ), And a fixed bed B of granular activated carbon is provided after such (specific) denitrification part A to promote nitrification and COD removal. Especially, the configuration is important, and even if the dissolved oxygen concentration in the raw water or the circulating nitrification solution is high, the denitrification reaction proceeds in the fixed bed A without any problem. This is because dissolved oxygen is difficult to diffuse inside the filter medium made of a solid solid in the form of a three-dimensional mesh, so that NO X inside the filter medium is reduced.
-N effectively promotes the denitrification reaction. Further, since the fixed bed A filled with the three-dimensional mesh-like particles has a large SS trapping capacity, it is less likely to be clogged and the fixed bed A is washed less frequently.
【００２３】さらに原水中のＳＳは、固定床Ａでほぼ全
てろ過除去されるので、粒状活性炭を充填した固定床Ｂ
の目詰まりは無視できるほど少ないという利点がある。
固定床Ａは運転に伴い目詰まりが生じるので、その際の
処理装置の洗浄方法について上記図１および図２を用い
て説明する。先ず、図１に示す単一処理槽内を上下に区
画して、それぞれに固定床Ａと固定床Ｂを配備する場合
の装置の洗浄法について説明する。汚水の浄化処理が進
行して固定床ＡにおけるＳＳの堆積が多くなり、固定床
Ａのろ過圧が上昇した時は、原水供給管２の弁を閉じ循
環ポンプを停止し、循環路３の弁を閉じ、ドレーン管８
の弁を開いて固定床Ｂの被処理水をドレーンする。この
操作によって固定床Ｂの洗浄は充分であるが、もし必要
ならば原水供給管２の弁を開き、ドレーン管８の弁を閉
じて固定床Ｂに原水を注入し、今一度上記ドレーン操作
を繰り返す。Further, since SS in the raw water is almost completely removed by filtration in the fixed bed A, the fixed bed B packed with granular activated carbon is used.
There is an advantage that the clogging of is negligible.
Since the fixed bed A is clogged with the operation, a method of cleaning the processing device at that time will be described with reference to FIGS. 1 and 2. First, a method of cleaning the apparatus when the inside of the single processing tank shown in FIG. 1 is divided into upper and lower parts and the fixed bed A and the fixed bed B are arranged in each of them will be described. When the amount of SS accumulated on the fixed bed A increases due to the progress of the purification process of the sewage, and the filtration pressure of the fixed bed A rises, the valve of the raw water supply pipe 2 is closed, the circulation pump is stopped, and the valve of the circulation path 3 is closed. Close the drain tube 8
Open the valve to drain the water to be treated in the fixed bed B. By this operation, the fixed bed B is sufficiently washed, but if necessary, the valve of the raw water supply pipe 2 is opened, the valve of the drain pipe 8 is closed, and the raw water is injected into the fixed bed B. repeat.
【００２４】次に、ドレーン管８の弁を閉じブロワー１
３から空洗部材１０への弁を開いて固定床Ａに空気を吹
き込んで空洗する。空洗後空洗部材１０への弁を閉じ、
洗浄排水管１８の弁を開き処理槽１中の被処理水を排出
し、被処理水の排出が終了した後洗浄排水管１８の弁を
閉じ、原水供給管２の弁を開き固定床Ａ中に原水を注入
し、再び空洗部材１０への弁を開いて固定床Ａに空気を
吹き込んで空洗する。この空洗を繰り返して固定床Ａを
充分洗浄する。Next, the valve of the drain pipe 8 is closed and the blower 1 is closed.
The valve from 3 to the air washing member 10 is opened, and air is blown into the fixed bed A to perform air washing. After the air washing, close the valve to the air washing member 10,
The valve of the cleaning drainage pipe 18 is opened to discharge the treated water in the treatment tank 1, and after the discharge of the treated water is completed, the valve of the cleaning drainage pipe 18 is closed, the valve of the raw water supply pipe 2 is opened, and the fixed bed A is provided. Raw water is injected into the tank, the valve to the air washing member 10 is opened again, and air is blown into the fixed bed A for air washing. The fixed bed A is thoroughly washed by repeating this air washing.
【００２５】次に、図２に示す単一処理槽内を左右に区
画して、それぞれに固定床Ａと固定床Ｂを配備する場合
の装置の洗浄法について説明する。この場合固定床Ｂの
洗浄は、原水供給管２の弁を閉じ、循環ポンプ１１を停
止し、循環路３の弁を閉じ、原水および硝化循環水の供
給を止め、洗浄排水管１９から被処理水を排出すること
によって固定床Ｂの洗浄は充分であるが、もし必要なら
ば原水供給管２の弁を開き、固定床Ｂに原水を注入し、
今一度上記洗浄排水管１９から被処理水を排出すること
によって固定床Ｂ内被処理水を排出する。Next, a method of cleaning the apparatus when the inside of the single processing tank shown in FIG. 2 is divided into right and left and the fixed bed A and the fixed bed B are respectively arranged will be described. In this case, for cleaning the fixed bed B, the valve of the raw water supply pipe 2 is closed, the circulation pump 11 is stopped, the valve of the circulation path 3 is closed, the supply of the raw water and the nitrification circulation water is stopped, and the treatment drainage pipe 19 is used for treatment. Cleaning of the fixed bed B is sufficient by discharging the water, but if necessary, the valve of the raw water supply pipe 2 is opened to inject the raw water into the fixed bed B,
Once again, the treated water in the fixed bed B is discharged by discharging the treated water from the cleaning drainage pipe 19.
【００２６】次に、ブロワー１３から空洗部材１０への
弁を開いて固定床Ａに空気を吹き込んで空洗する。空洗
後空洗部材１０への弁を閉じ、洗浄排水管１８の弁を開
き処理槽１中の被処理水を排出し、原水供給管２の弁を
開き固定床Ａ中に原水を注入し、再び空洗部材１０への
弁を開いて固定床Ａに空気を吹き込んで空洗する。この
空洗を繰り返して固定床Ａを充分洗浄する。この時、固
定床Ａ側の水位を越流堰１５より下げ、高濁度の洗浄水
が粒状活性炭の固定床Ｂに達しないようにすることが重
要であり、この条件を満たすなら、固定床Ａの洗浄方法
は前記に限定するものではない。Next, the valve from the blower 13 to the air washing member 10 is opened, and air is blown into the fixed bed A for air washing. After the air washing, the valve to the air washing member 10 is closed, the valve of the washing drain pipe 18 is opened to discharge the water to be treated in the treatment tank 1, the valve of the raw water supply pipe 2 is opened, and the raw water is injected into the fixed bed A. Then, the valve to the air washing member 10 is opened again, and air is blown into the fixed bed A to perform air washing. The fixed bed A is thoroughly washed by repeating this air washing. At this time, it is important to lower the water level on the fixed bed A side from the overflow weir 15 so that high turbidity wash water does not reach the fixed bed B of granular activated carbon. The cleaning method of A is not limited to the above.
【００２７】なお上記図１および図２に示した、上下に
区画された様式および隔壁Ｃによって左右に区画された
様式のいずれの処理槽においても、固定床Ａの下部、よ
り詳しくは空洗部材１０より下部で原水供給部２より上
部に邪魔板やＳＳ沈殿部を設け、堆積したＳＳをドレー
ンにより除去することも良い。In each of the processing tanks shown in FIGS. 1 and 2 which are divided into upper and lower portions and the partition portion C is divided into left and right portions, the lower portion of the fixed bed A, more specifically, the air washing member is used. A baffle plate or an SS settling section may be provided below the raw water supply section 2 and above the raw water supply section 2, and the accumulated SS may be removed by a drain.
【００２８】[0028]
【実施例】下水を目開き１０ｍｍの粗目スクリーンを通
した、表１に示す水質の原水を対象にして、本発明の処
理装置を用いて予め沈殿槽を設けずに直接処理し、本発
明の効果を実証した。 表１ （原水の水質） 水温 ： １５〜１８℃ ｐＨ ： ７．２〜７．３ ＳＳ ： ９２〜１７０ｍｇ／リットル ＢＯＤ ： １２０〜１８０ｍｇ／リットル ＣＯＤ ： ３８〜４６ ｍｇ／リットル 全窒素 ： ２９〜３６ ｍｇ／リットルEXAMPLE Sewage was directly treated with raw water having the water quality shown in Table 1 through a coarse screen having an opening of 10 mm by using the treatment apparatus of the present invention without preliminarily setting a sedimentation tank. Demonstrated the effect. Table 1 (Water quality of raw water) Water temperature: 15 to 18 ° C. pH: 7.2 to 7.3 SS: 92 to 170 mg / liter BOD: 120 to 180 mg / liter COD: 38 to 46 mg / liter Total nitrogen: 29 to 36 mg / liter
【００２９】処理条件を表２に示す。 表２ （処理条件） 処理装置寸法： 寸法 ０．４ｍ×０．８ｍの角型槽を
中仕切りで ０．４ｍ×０．４ｍの２槽並置型としたもの 高さ ４．５ｍ 固定床Ａの高さ ２．０ｍ 固定床Ｂの高さ ２．０ｍ 下水流量 ： ５．７６ｍ3 ／日 ろ過速度 ： ３６ ｍ／日 散気管からの空気供給量： １５ Ｎｍ3 ／日 硝化液循環量 ： ６ ｍ3 ／日 充填層Ａおよび充填層Ｂに充填するろ材はろ材の粒径が
１０×２５×２５ｍｍの角状、セル数１３のポリウレタ
ンフォームの粒状片である。Table 2 shows the processing conditions. Table 2 (Treatment conditions) Treatment equipment dimensions: Dimensions 0.4 m × 0.8 m square tanks with partitioning into 0.4 m × 0.4 m 2-tank side-by-side type height 4.5 m Fixed bed A Height 2.0 m Height of fixed bed B 2.0 m Sewage flow rate: 5.76 m 3 / day Filtration rate: 36 m / day Air supply from diffuser tube: 15 Nm 3 / day Nitrification solution circulation: 6 m 3 / day The filter medium to be filled in the packed bed A and the packed bed B is a granular piece of polyurethane foam having a square shape with a particle size of 10 × 25 × 25 mm and a cell number of 13.
【００３０】表２の処理条件で表１の水質の下水を１０
ヶ月間の連続処理した。通水開始後３０日間で、ポリウ
レタンフォームの粒状片のろ材に脱窒素菌、ＢＯＤ資化
菌が十分固定化されたので、３１日目から土日を除く毎
日１回、２４時間コンポジットサンプルを採取し（土、
日はサンプリングしない）、水質分析を行った。その結
果を表３に示す。 表３ （処理水水質） ｐＨ ： ６．８〜７．０ ＳＳ ： ２．０〜４．３ ｍｇ／リットル ＢＯＤ ： ２〜４ ｍｇ／リットル ＣＯＤ ： ３．８〜４．７ ｍｇ／リットル 全窒素 ： ６．１〜８．６ ｍｇ／リットル 色度 ： ５ 以下 表３から明らかなように、ＳＳ、ＢＯＤ、ＣＯＤ、Ｔ−
Ｎ、色度が著しく少ない清澄水が得られた。Under the treatment conditions of Table 2, 10 times the sewage of the water quality of Table 1
It was continuously treated for months. Denitrifying bacteria and BOD-assimilating bacteria were sufficiently immobilized on the filter material of granular particles of polyurethane foam within 30 days after the start of water flow, so from the 31st day, a 24-hour composite sample was taken once a day excluding Saturday and Sunday. (soil,
No sampling was performed on the day) and water quality analysis was performed. The results are shown in Table 3. Table 3 (Water quality of treated water) pH: 6.8 to 7.0 SS: 2.0 to 4.3 mg / liter BOD: 2 to 4 mg / liter COD: 3.8 to 4.7 mg / liter Total nitrogen : 6.1 to 8.6 mg / liter Chromaticity: 5 As is clear from Table 3 below, SS, BOD, COD, T-
N, clear water with extremely low chromaticity was obtained.
【００３１】また、固定床Ａの洗浄頻度は３〜４日に１
回でよく、極めて長期間のろ過継続ができた。（図３の
従来装置では１日に１回の洗浄が必要である）活性炭固
定床Ｂの洗浄はおよそ１ヶ月に１回で充分であった。The cleaning frequency of the fixed bed A is 1 every 3 to 4 days.
The number of times was sufficient, and filtration could be continued for an extremely long time. (The conventional apparatus of FIG. 3 needs to be washed once a day) The fixed bed B of the activated carbon was washed about once a month.
【００３２】[0032]
【発明の効果】本発明によって有機性汚水を処理するこ
とにより、次の効果が得られる。 １．最初沈殿池を設置する必要がなく、ＳＳの高い下水
をも直接処理できるのでコンパクト化できる。 ２．ろ床の目詰まりが著しく少なく、ろ床洗浄頻度が激
減する。従って、メンテナンスが容易で洗浄排水の発生
量も少ない。 ３．立体網目状の粒状物からなるろ材の内部に脱窒素菌
を高濃度に固定化し、粒状活性炭の表面に硝化菌を高濃
度に固定化したので、硝化反応、脱窒素反応の速度が従
来法におけるより３〜４倍も大きい。また活性炭の表面
にＣＯＤ分解菌が繁殖するため、活性炭を再生すること
なく長期間ＣＯＤ除去を行える。さらに色度も除去でき
る。 ４．高速で硝化・脱窒素、さらにＣＯＤ、色度の除去を
行えるので装置設置スペースが少なく、ろ床の洗浄も合
理的に行える。The following effects can be obtained by treating organic wastewater according to the present invention. 1. There is no need to install a sedimentation tank at the beginning, and sewage with high SS can be directly treated, so it can be made compact. 2. The filter bed is not significantly clogged and the filter bed cleaning frequency is drastically reduced. Therefore, maintenance is easy and the amount of cleaning wastewater generated is small. 3. Denitrifying bacteria were immobilized at a high concentration inside the filter medium consisting of three-dimensional mesh-like particles, and nitrifying bacteria were immobilized at a high concentration on the surface of the granular activated carbon, so the rate of nitrification and denitrification reactions was 3-4 times larger. Further, since COD-degrading bacteria propagate on the surface of activated carbon, COD can be removed for a long period of time without regenerating the activated carbon. Furthermore, chromaticity can be removed. 4. Since nitrification and denitrification as well as COD and chromaticity removal can be performed at high speed, the equipment installation space is small and the filter bed can be washed reasonably.
【図１】上下に区画された様式の本発明の生物学的硝化
脱窒素処理槽の１例を示す模式図。FIG. 1 is a schematic view showing an example of a biological nitrification denitrification treatment tank of the present invention in a vertically partitioned manner.
【図２】隔壁Ｃによって左右に区画された様式の本発明
の生物学的硝化脱窒素処理槽の１例を示す模式図。FIG. 2 is a schematic diagram showing an example of the biological nitrification denitrification treatment tank of the present invention in a mode of being divided into right and left by a partition wall C.
【図３】従来の生物学的硝化脱窒素処理装置の典型例を
示す模式図。FIG. 3 is a schematic diagram showing a typical example of a conventional biological nitrification denitrification treatment apparatus.
１ 処理槽 ２ 原水供給管 ３ 循環路 ４ 多孔性部材 ５ 支持部材 ６ 多孔性部材 ７ 排水管 ９ 散気部材 １０ 空洗部材 １１ 循環ポンプ １２ 酸素含有ガス供給源 １３ ブロワー １４ 支持部材 １５ 越流堰 １６ 処理水流出路 １７ 多孔性部材 １８ 洗浄排水管 １９ 洗浄排水管 ２０ 原水 ２１ 脱窒素ろ床 ２２ 硝化ろ床 ２３ 散気管 ２４ 処理水槽 ２５ 洗浄水供給管 ２６ 洗浄水供給管 ２７ ガス供給管 ２８ 洗浄排水管 ２９ 洗浄排水管 ３０ ポンプ ３１ ポンプ ３２ 循環用配管 ３３ 循環用配管 ３４ 循環用配管 Ａ 固定床 Ｂ 固定床 Ｃ 隔壁 1 Treatment Tank 2 Raw Water Supply Pipe 3 Circulation Channel 4 Porous Member 5 Supporting Member 6 Porous Member 7 Drain Pipe 9 Diffusing Member 10 Air Washing Member 11 Circulation Pump 12 Oxygen-Containing Gas Supply Source 13 Blower 14 Supporting Member 15 Overflow Weir 16 Treated water outflow passage 17 Porous member 18 Washing drainage pipe 19 Washing drainage pipe 20 Raw water 21 Denitrification filter bed 22 Nitrification filter bed 23 Diffusing pipe 24 Treated water tank 25 Washing water supply pipe 26 Washing water supply pipe 27 Gas supply pipe 28 Washing drainage Pipe 29 Washing drainage pipe 30 Pump 31 Pump 32 Circulation pipe 33 Circulation pipe 34 Circulation pipe A Fixed floor B Fixed floor C Partition wall
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 3/10 ＺＡＢ Ａ 3/30 ＺＡＢ Ｂ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location C02F 3/10 ZAB A 3/30 ZAB B
Claims (3)
網目構造をもつ粒状物を充填した固定床Ａに通水して、
生物学的脱窒素すると共に汚水に含まれるＳＳを除去し
た後、好気性の条件下で粒状活性炭を充填した固定床Ｂ
に通水して、生物学的硝化とＣＯＤ除去を行い、該固定
床Ｂからの流出水の一部を前記固定床Ａに循環せしめる
ことを特徴とする有機性汚水の浄化方法。1. A sewage containing ammoniacal nitrogen is passed through a fixed bed A filled with particles having a three-dimensional network structure,
Fixed bed B packed with granular activated carbon under aerobic conditions after biological denitrification and removal of SS contained in wastewater
A method for purifying organic sewage, characterized in that biological nitrification and COD removal are performed by passing water through to the fixed bed A, and a part of the outflow water from the fixed bed B is circulated to the fixed bed A.
的脱窒素すると共にＳＳを除去する立体的網目構造をも
つ粒状物を充填した固定床Ａと、固定床Ａからの流出水
を好気性の条件下で生物学的硝化とＣＯＤ除去を行う粒
状活性炭を充填した固定床Ｂを有し、該固定床Ｂからの
流出水の一部を前記固定床Ａに循環せしめるように構成
すると共に、固定床Ｂの下方部に空洗部材を設けたこと
を特徴とする有機性汚水の浄化装置。2. A fixed bed A filled with a granular material having a three-dimensional network structure for biologically denitrifying sewage containing ammoniacal nitrogen and removing SS, and effluent from the fixed bed A is aerobic. In addition to having a fixed bed B packed with granular activated carbon for biological nitrification and COD removal under the conditions of (1), a part of the water discharged from the fixed bed B is circulated to the fixed bed A, and An organic wastewater purification apparatus, characterized in that an air washing member is provided below the fixed bed B.
もつ粒状物を充填し生物学的脱窒素すると共にＳＳを除
去する固定床Ａ、下流側に粒状活性炭を充填し酸素含有
気体の散気部材を備えて生物学的硝化とＣＯＤ除去を行
う固定床Ｂを配置し、アンモニア性窒素を含む汚水を上
向流で固定床Ａを通した後、隔壁を越して下向流で固定
床Ｂを通すように構成すると共に、固定床Ｂからの流出
水の一部を前記固定床Ａに循環させる手段を設けてなる
有機性汚水の浄化装置。3. A fixed bed A which is filled with a granular material having a three-dimensional network structure on the upstream side through a partition wall to biologically denitrify and removes SS, and an oxygen-containing gas which is filled with granular activated carbon on the downstream side. The fixed bed B for biological nitrification and COD removal is provided with the aeration member, and sewage containing ammoniacal nitrogen is passed through the fixed bed A in an upward flow, and then in a downward flow through a partition wall. An apparatus for purifying organic sewage, which is configured to pass through the fixed bed B, and which is provided with a means for circulating a part of the outflow water from the fixed bed B to the fixed bed A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4315512A JP2609195B2 (en) | 1992-11-02 | 1992-11-02 | Organic wastewater purification method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4315512A JP2609195B2 (en) | 1992-11-02 | 1992-11-02 | Organic wastewater purification method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06142692A true JPH06142692A (en) | 1994-05-24 |
| JP2609195B2 JP2609195B2 (en) | 1997-05-14 |
Family
ID=18066246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4315512A Expired - Fee Related JP2609195B2 (en) | 1992-11-02 | 1992-11-02 | Organic wastewater purification method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2609195B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0739859A1 (en) * | 1995-04-18 | 1996-10-30 | SHARP Corporation | Apparatus and method for waste water treatment using charcoal biologically activated |
| JP2008029943A (en) * | 2006-07-27 | 2008-02-14 | Kanazawa Univ | Microorganism carrier and waste water treatment equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62168592A (en) * | 1986-01-17 | 1987-07-24 | Hitachi Plant Eng & Constr Co Ltd | Waste water treatment unit |
| JPH02273594A (en) * | 1989-04-14 | 1990-11-08 | Toto Ltd | Carrier for immobilizing microorganism |
| JPH03296494A (en) * | 1990-04-16 | 1991-12-27 | Ebara Infilco Co Ltd | Treatment apparatus for organic polluted water |
| JPH04284894A (en) * | 1991-03-14 | 1992-10-09 | Ebara Infilco Co Ltd | Controlling method of biological treatment of sewage and its apparatus |
-
1992
- 1992-11-02 JP JP4315512A patent/JP2609195B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62168592A (en) * | 1986-01-17 | 1987-07-24 | Hitachi Plant Eng & Constr Co Ltd | Waste water treatment unit |
| JPH02273594A (en) * | 1989-04-14 | 1990-11-08 | Toto Ltd | Carrier for immobilizing microorganism |
| JPH03296494A (en) * | 1990-04-16 | 1991-12-27 | Ebara Infilco Co Ltd | Treatment apparatus for organic polluted water |
| JPH04284894A (en) * | 1991-03-14 | 1992-10-09 | Ebara Infilco Co Ltd | Controlling method of biological treatment of sewage and its apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0739859A1 (en) * | 1995-04-18 | 1996-10-30 | SHARP Corporation | Apparatus and method for waste water treatment using charcoal biologically activated |
| JP2008029943A (en) * | 2006-07-27 | 2008-02-14 | Kanazawa Univ | Microorganism carrier and waste water treatment equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2609195B2 (en) | 1997-05-14 |
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