JPH05212394A - Method and apparatus for treating waste water containing organic substance - Google Patents

Method and apparatus for treating waste water containing organic substance

Info

Publication number
JPH05212394A
JPH05212394A JP4765692A JP4765692A JPH05212394A JP H05212394 A JPH05212394 A JP H05212394A JP 4765692 A JP4765692 A JP 4765692A JP 4765692 A JP4765692 A JP 4765692A JP H05212394 A JPH05212394 A JP H05212394A
Authority
JP
Japan
Prior art keywords
filter
liquid separation
air
solid
beds
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
Application number
JP4765692A
Other languages
Japanese (ja)
Other versions
JP2572327B2 (en
Inventor
Katsuyuki Kataoka
克之 片岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Ebara Research Co Ltd
Original Assignee
Ebara Research Co Ltd
Ebara Infilco Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ebara Research Co Ltd, Ebara Infilco Co Ltd filed Critical Ebara Research Co Ltd
Priority to JP4765692A priority Critical patent/JP2572327B2/en
Publication of JPH05212394A publication Critical patent/JPH05212394A/en
Application granted granted Critical
Publication of JP2572327B2 publication Critical patent/JP2572327B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

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  • Biological Treatment Of Waste Water (AREA)
  • Filtering Materials (AREA)

Abstract

PURPOSE:To attain the sufficient removal of SS and BOD by feeding waste water containing organic substances to aerobic filter beds installed in parallel, increasing the amount of air to be supplied to each objective filter bed interchangeably, and introducing water from the filter beds to a solid-liquid separation process. CONSTITUTION:Waste water containing organic substances, after being treated in a filtration vessel 1 to remove fine SS sufficiently, is fed to each of fixed type aerobic filter beds A1, A2. The filtrate introduced from the bottom of biological filter beds A1, A2 is passed through the beds A1, A2 together with bubbles ejected from air ejecting tubes D1, D2 to remove BOD and SS sufficiently. In this process, at the point when the SS content in the biologically treated water begins to increase, the amount of air from air blowers B1, B2 is sharply increased while the filtrate being fed. Since the SS caught by a filter medium and grown microorganisms begin to flow out into a biological treatment effluent pipe 3, the purified drain can be transferred directly to a filter layer F in the filtration process or a solid-liquid separation vessel S installed separately.

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、有機性汚水の好気性生
物ろ床による浄化技術に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for purifying organic wastewater by aerobic biological filter.

【0002】[0002]

【従来の技術】従来より、好気性生物ろ床(Biolo
gical Aerated Filter 略称BA
F)は公知である。従来のBAFは図4に示すように槽
13の水面下にアンスラサイト、シャモット、坑火石な
ど粒状鉱物の充填層14を設け、該充填層14内または
下部に空気散気管15を設けたものである。
2. Description of the Related Art Conventionally, aerobic biological filter (Biolo)
physical Associated Filter Abbreviation BA
F) is known. As shown in FIG. 4, the conventional BAF is provided with a packed bed 14 of granular minerals such as anthracite, chamotte, and minestone under the water surface of a tank 13, and an air diffuser 15 provided in or under the packed bed 14. is there.

【0003】しかし、従来型BAFは充填層14だけで
は汚水処理を行うことができず各種の付帯設備(処理水
貯槽20、洗浄排水貯槽22、洗浄ポンプ21、洗浄水
供給配管24など)が不可欠となっており、極めて繁雑
なシステムとなっている他、これら付帯設備の設置スペ
ースや建設費が大きく、従来型BAFの重大な欠点とな
っている。
However, in the conventional BAF, the sewage treatment cannot be performed only by the packed bed 14, and various auxiliary equipments (treatment water storage tank 20, cleaning drainage storage tank 22, cleaning pump 21, cleaning water supply pipe 24, etc.) are indispensable. In addition to the extremely complicated system, the installation space and construction cost of these incidental equipment are large, which is a serious drawback of the conventional BAF.

【0004】また、従来型BAFは次のような方法で運
転されている。すなわち、下水などの有機性汚水(原
水)は、沈殿池16にて沈降性のよいSSを除去した
後、BAFの充填層14内を下向流で流過し、生物ろ過
された後、清澄処理水となって処理水貯槽20に流入す
る。このような処理を続けるに従い、BAFの充填層1
4内にSSが蓄積し、目詰まりが進むため、ろ過抵抗が
急増するので、処理水貯槽20内に貯留されている清澄
水をポンプ21によってBAFの下部に供給し、BAF
の充填層14内のろ材を流動化させ、逆洗する。この結
果BAFの充填層14からの洗浄廃水が急激に多量に排
出されるので、これを洗浄排水貯槽22に一旦貯留し、
これを定量的に少しづつポンプ23によって沈殿池16
に移送し、洗浄廃水中のSSを沈降分離させる。
Further, the conventional BAF is operated by the following method. That is, organic sewage (raw water) such as sewage, after removing SS having a good settling property in the settling tank 16, flows downward in the packed bed 14 of the BAF, is biologically filtered, and is then clarified. It becomes treated water and flows into the treated water storage tank 20. As such treatment is continued, the filling layer 1 of BAF is
Since SS accumulates in 4 and clogging progresses, the filtration resistance rapidly increases. Therefore, the clear water stored in the treated water storage tank 20 is supplied to the lower part of the BAF by the pump 21.
The filter medium in the packed bed 14 is fluidized and backwashed. As a result, a large amount of cleaning wastewater from the packed bed 14 of the BAF is rapidly discharged, so that this is temporarily stored in the cleaning drainage storage tank 22,
This is quantitatively little by little pumped by the settling tank 16
Then, the SS in the washing wastewater is separated by sedimentation.

【0005】以上のように図4の従来型BAFによる処
理方法は複雑で、さらに次のような欠点がある。 下水のようにSSが100mg/リットル以上ある
原水の場合はBAFの前段に沈殿池16を設けなければ
ならない。さもないと、BAFでの目詰まりが急激に進
んでしまう。しかし、沈殿池16でのSSの沈降分離速
度は下水処理の場合せいぜい25〜30m/日と小さい
値しかとれないので、沈殿池16の建設費、設置スペー
スが極めて大きなものとなってしまう。 BAFのろ床の洗浄のために、ろ床容積の3倍以上
という多量の洗浄用水を短時間に使用するため、洗浄用
水槽(処理水貯槽20を利用する)の所要容積と洗浄排
水貯槽22が極めて大きなものとなってしまう欠点があ
る。また、洗浄用のポンプ21の動力設備費も高い。
As described above, the processing method by the conventional BAF of FIG. 4 is complicated and has the following drawbacks. In the case of raw water with SS of 100 mg / liter or more like sewage, the settling tank 16 must be provided before BAF. Otherwise, the BAF will be clogged rapidly. However, the settling separation rate of SS in the settling basin 16 can be as small as 25 to 30 m / day at the time of sewage treatment, so that the construction cost and installation space of the settling basin 16 become extremely large. In order to use a large amount of cleaning water of 3 times or more the filter bed volume for a short time for cleaning the filter bed of BAF, the required volume of the cleaning water tank (using the treated water storage tank 20) and the cleaning drainage storage tank 22 Has the drawback that it becomes extremely large. In addition, the power equipment cost of the cleaning pump 21 is also high.

【0006】 BAFのろ床の目詰まりが早く、下水
処理の場合、BAFの前段に沈殿池16を設けて、SS
をあらかじめ減少させても、ろ過速度25m/日という
小さなろ過速度でろ過しても、なおろ過継続時間は20
〜24時間しかない。従って、BAF自体の設置面積や
建設コストが大きくなるだけでなく、頻繁にBAFを洗
浄しなければならないという重大な欠点がある。
When the filter bed of BAF is clogged quickly, and in the case of sewage treatment, a settling tank 16 is provided in front of BAF to
Even if the filtration rate is reduced in advance or the filtration rate is as small as 25 m / day, the filtration duration is still 20
~ 24 hours only. Therefore, there is a serious drawback that not only the installation area and construction cost of the BAF itself increase but also the BAF must be frequently cleaned.

【0007】[0007]

【発明が解決しようとする課題】本発明の課題は、従来
装置の前記〜の欠点のために生じる諸種の問題を完
全に解決する新処理システムを確立することを課題とす
るものである。
SUMMARY OF THE INVENTION An object of the present invention is to establish a new processing system which completely solves various problems caused by the above-mentioned drawbacks of the conventional apparatus.

【0008】[0008]

【課題を解決するための手段】上記課題は、本発明の以
下に述べる有機性汚水の処理方法および処理装置によっ
て達成される。すなわち、(1)固液分離後の有機性汚
水を、複数並列に設けた好気性生物ろ床に供給すると共
に、該ろ床の少なくとも1基への供給空気量を所要時間
増加させ、該操作後のろ床流出水を所要時間前記固液分
離工程に導くか、または別途設けた固液分離装置へ導く
ことを特徴とする有機性汚水の処理方法。
The above objects can be achieved by the method and apparatus for treating organic wastewater described below according to the present invention. That is, (1) the organic wastewater after solid-liquid separation is supplied to a plurality of aerobic biological filter beds provided in parallel, and the amount of air supplied to at least one of the filter beds is increased for a required time to perform the operation. A method for treating organic sewage, characterized in that the subsequent filter bed outflow water is led to the solid-liquid separation step for a required time or to a separately provided solid-liquid separation device.

【0009】(2)少なくとも固液分離手段と、複数並
列に設けた好気性生物ろ床と、該ろ床に空気を供給する
手段ならびに該濾床に送気する空気送風量を可変とする
と共に送気量変化対象ろ床を切替える手段と、送気量変
化後のろ床流出水を該固液分離手段または別途設けた固
液分離装置へ導く手段を有してなることを特徴とする有
機性汚水の処理装置。
(2) At least solid-liquid separation means, a plurality of aerobic biological filter beds provided in parallel, means for supplying air to the filter beds, and the amount of air blown to the filter beds are variable. An organic device comprising means for switching the filter bed subject to change in air supply amount, and means for guiding the filter bed outflow water after the change in air supply amount to the solid-liquid separation means or a separately provided solid-liquid separation device. Sewage treatment equipment.

【0010】ここで、前記好気性生物ろ床の前段の固液
分離手段は沈澱などの公知の手段のいずれでもよいがろ
過であることが好ましい。また、前記好気性生物ろ床の
ろ材は公知ろ材のいずれでもよいが立体的網目構造を有
する粒状ろ材であることが好ましい。
Here, the solid-liquid separation means in the preceding stage of the aerobic organism filter bed may be any known means such as precipitation, but filtration is preferred. The filter medium for the aerobic biological filter may be any known filter medium, but is preferably a granular filter medium having a three-dimensional network structure.

【0011】なお、該固液分離手段および方法ならびに
別途設置する固液分離装置にかかる固液分離の手段およ
び方法は原水に含まれる懸濁物が速やかに、効率よく分
離できる手段および方法であればよく、例えばろ過によ
る方法や凝集剤を使用する沈殿法などを適宜に採用でき
る。
The solid-liquid separation means and method and the solid-liquid separation means and method relating to a separately installed solid-liquid separation device may be means and methods capable of quickly and efficiently separating a suspension contained in raw water. For example, a method by filtration or a precipitation method using a flocculant can be appropriately adopted.

【0012】[0012]

【作用】本発明の代表的構成例の作用を図1を参照しつ
つ以下に説明する。但し、本発明の実施態様はこれに限
定されるものではない。以下に有機性汚水の代表例とし
て下水を取り上げて説明する。処理工程の最初は、ろ床
に粒状ろ材などを充填したろ過層Fを有するろ過槽1で
行われるろ過工程であり、ろ過槽1でのろ過操作によっ
て下水中の微細なSSを高度に除去し、SS含有量を凡
そ30mg/リットル以下に低下せしめたろ過水を得
る。
The operation of the typical configuration of the present invention will be described below with reference to FIG. However, the embodiment of the present invention is not limited to this. Below, sewage will be described as a representative example of organic wastewater. The first of the treatment steps is the filtration step performed in the filtration tank 1 having the filtration layer F in which the filter bed is filled with granular filter media, etc. The filtration operation in the filtration tank 1 highly removes fine SS in the sewage. , Filtered water having an SS content reduced to about 30 mg / liter or less is obtained.

【0013】ろ過層Fに充填されているろ材としては材
質が軽量のプラスチックろ材例えばポリプロピレン製な
どの中空状ろ材9であって、その形状は円筒状、角筒
状、または球状もしくは多面体状のいずれの粒状物も適
用できる。特に図2に示したような側面に格子状の開口
部10を多数有する中空状ろ材9が好適なろ材である。
このろ材によってろ過抵抗の増加を著しく少なくでき
る。
The filter medium filled in the filtration layer F is a light-weight plastic filter medium, for example, a hollow filter medium 9 made of polypropylene or the like, which has a cylindrical shape, a rectangular tube shape, or a spherical shape or a polyhedral shape. Granules of can also be applied. In particular, a hollow filter medium 9 having a large number of lattice-shaped openings 10 on the side surface as shown in FIG. 2 is a suitable filter medium.
This filter material can significantly reduce the increase in filtration resistance.

【0014】工程の第2は第1工程で得られたろ過水を
ろ過水流出管2で複数の固定床型好気性生物ろ床A1
2 、・・の各々に供給する。以下簡単のために図1に
示した2基のろ床構成の例について説明する。実際には
これらろ床は5ユニット以上、好ましくは10ユニット
以上設けることが望ましい。
In the second step, the filtered water obtained in the first step is filtered through a filtered water outflow pipe 2 to form a plurality of fixed-bed aerobic biological filter beds A 1 ,
Supply to A 2 , ... For simplification, an example of the two filter bed configurations shown in FIG. 1 will be described below. In practice, it is desirable that these filter beds be provided in an amount of 5 units or more, preferably 10 units or more.

【0015】本発明の好気性生物ろ床A1 およびA2
用いるろ材は、比重の大きな粒状鉱物よりなるろ材のア
ンスラサイト、シャモット、活性炭、坑火石、セラミッ
クなどは洗浄が面倒であるのであまり好ましくなく、比
重が1.0に近く流動化し易い、軽いろ材を用いること
が好ましい。特に立体網目構造をもつ粒状ろ材11(図
3)、例えばポリウレタンフォームの粒状片を用いる
と、軽くて流動し易いという利点のみでなく、微生物を
粒状体の表面だけでなく、その内部にも高濃度に固定化
できるので最適である。
The filter medium used in the aerobic biological filter beds A 1 and A 2 of the present invention is not so much because it is troublesome to clean anthracite, chamotte, activated carbon, minestone, ceramic, etc., which is a filter medium made of a granular mineral having a large specific gravity. It is not preferable, and it is preferable to use a light filter medium having a specific gravity close to 1.0 and easily fluidized. In particular, when a granular filter medium 11 (FIG. 3) having a three-dimensional network structure, for example, a granular piece of polyurethane foam, is used, not only is it light and easy to flow, but also the microorganisms are not only high on the surface of the granular body but also on the inside thereof. It is optimal because it can be fixed to the concentration.

【0016】しかして、ろ過水をろ過水流出管2を通し
て生物ろ床A1 (およびA2 )の下部から流入し、空気
散気管D1 (およびD2 )から吐出される気泡ととも
に、ろ過水は上向流で立体網目構造を有する粒状ろ材1
1が充填されている生物ろ床A1 (およびA2 )を通過
して行く。この過程で、ろ過水中のBODとSSは生物
処理学的に高度に除去され、SSが20mg/リットル
以下の清澄な生物処理水となる。なお、好気性生物ろ床
の立体網目状ポリウレタンフォームは空気散気管D
1 (およびD2 )からの気泡がポリウレタンフォームの
表面および内部に捕捉されるため、見掛け比重が1.0
未満になり、槽内に浮上した状態になる。
Then, the filtered water flows in through the filtered water outflow pipe 2 from the lower part of the biological filter A 1 (and A 2 ) and is discharged together with the bubbles discharged from the air diffuser D 1 (and D 2 ). Is an upward flow granular filter medium having a three-dimensional network structure 1
Go through the biological filter bed A 1 (and A 2 ) filled with 1. In this process, BOD and SS in the filtered water are highly biologically removed, resulting in clear biologically treated water with SS of 20 mg / liter or less. In addition, the three-dimensional mesh polyurethane foam of the aerobic biological filter is an air diffuser D
Bubbles from 1 (and D 2 ) are trapped on the surface and inside of the polyurethane foam, resulting in an apparent specific gravity of 1.0.
It will be less than, and will be in a state of floating in the tank.

【0017】ポリウレタンフォームからなる粒状ろ材の
空隙率が96%以上と極めて大きいこと、および好気性
生物ろ床A1 (およびA2 )に流入する下水のSSがあ
らかじめろ過手段によって高度に除去され、SSが30
mg/リットル以下に減少しているため、生物ろ床A1
(およびA2 )のろ床の目詰まりは著しく少なく、ろ過
速度100m/日という高ろ過速度でも60時間以上運
転しても目詰まりは起こらず生物ろ過処理を継続でき
る。
The porosity of the granular filter material made of polyurethane foam is extremely large at 96% or more, and the SS of the sewage flowing into the aerobic biological filter bed A 1 (and A 2 ) is highly removed beforehand by the filtration means, SS is 30
Since it has decreased to less than mg / liter, biological filter bed A 1
The clogging of the filter bed (and A 2 ) is extremely small, and the clogging does not occur even if the filtration rate is as high as 100 m / day for 60 hours or more, and the biological filtration treatment can be continued.

【0018】しかしながら、これ以上の時間生物ろ床A
1 (およびA2 )の処理を続けると過剰微生物のリーク
などの原因により生物処理水中のSSの含量が増加し始
めるのでこの時点で、ろ過水の供給を行いながら空気ブ
ロアB1 (あるいはB2 )の吐出空気量を急激に増加さ
せる。この吐出空気量を急激に増加させる時点は生物処
理水の濁度を濁度計によって測定するなど任意の手段を
用いて決定することができる。
However, the biological filter bed A for a longer time
If the treatment of 1 (and A 2 ) is continued, the content of SS in the biologically treated water will start to increase due to a leak of excess microorganisms. At this point, therefore, the air blower B 1 (or B 2 A) The discharge air amount is rapidly increased. The time at which the amount of discharged air is rapidly increased can be determined by using any means such as measuring the turbidity of the biologically treated water with a turbidimeter.

【0019】例えば生物ろ床A1 内に5〜30分間程度
多量の空気を送り込むと、ろ材が激しい気液混相流によ
って攪乱され、それまで捕捉していたSSと増殖微生物
がろ材から除去され、生物処理水流出管3中に流出し始
める。この時生物処理水流出管3の処理水流出バルブV
3 を閉じ、洗浄排水流出管4の洗浄排水バルブV1 を開
けておき、洗浄排水を洗浄排水流出管4を通して、さら
に洗浄排水還流管5の方に導いて生物処理工程の前段の
ろ過工程のろ過層Fに直送するか、別個に設置した固液
分離槽Sに移送するかする。
For example, when a large amount of air is sent into the biological filter bed A 1 for about 5 to 30 minutes, the filter medium is disturbed by the violent gas-liquid multiphase flow, and the SS and the proliferating microorganisms trapped until then are removed from the filter medium. Begins to flow into the biological treated water outflow pipe 3. At this time, the treated water outflow valve V of the biological treated water outflow pipe 3
3 is closed and the cleaning drain valve V 1 of the cleaning waste water outflow pipe 4 is opened, and the cleaning waste water is led through the cleaning waste water outflow pipe 4 and further toward the cleaning waste water recirculation pipe 5 to perform the filtration process in the previous stage of the biological treatment process. It is directly sent to the filtration layer F or is transferred to a separately installed solid-liquid separation tank S.

【0020】空気ブロアB1 からの吐出空気量を所定の
時間後に定常値に減少させた時点から1〜2時間位はS
Sの含量が高い洗浄排水の流出が続くが、その後再びS
Sが10〜15mg/リットル程度の清澄水が流出する
ようになるので、その時点で生物処理水流出管3の処理
水流出バルブV3 を開き、洗浄排水流出管4の洗浄排水
バルブV1 を閉じ、生物処理水を生物処理水流出管3の
方に放流し始める。このように、生物ろ床A1 (あるい
はA2 )の洗浄を終了させた後、別の生物ろ床(実際に
はA3 、A4 ・・・A10など)の洗浄を同様の方法で順
次行って行く。
From the time when the amount of air discharged from the air blower B 1 is reduced to a steady value after a predetermined time, about 1 to 2 hours is S.
Sewage effluent with a high S content continues to flow out, but then S
Since clear water of about 10 to 15 mg / liter of S comes to flow out, the treated water outflow valve V 3 of the biological treated water outflow pipe 3 is opened at that time, and the cleaning drainage valve V 1 of the cleaning drainage outflow pipe 4 is opened. Close and start discharging the biotreated water toward the biotreated water outflow pipe 3. In this way, after the washing of the biological filter bed A 1 (or A 2 ) is completed, another biological filter bed (actually A 3 , A 4 ... A 10 etc.) is washed by the same method. I will go sequentially.

【0021】上記図1に示した2基の生物ろ床による、
例えば生物処理の説明において、好気性生物ろ床A
1 (およびA2 )で生物処理を行うと表現して説明した
のは、生物ろ床A1 でろ過水の生物処理をするだけでな
く、ある時点ではろ床A1 およびろ床A2 が同時に生物
処理を行う時間帯があることを意味している。
According to the two biological filter beds shown in FIG. 1,
For example, in the explanation of biological treatment, aerobic biological filter A
The explanation that the biological treatment is performed by 1 (and A 2 ) is that not only the biological treatment of the filtered water is performed by the biological filter bed A 1 , but at some point, the filter bed A 1 and the filter bed A 2 are At the same time, it means that there is a time zone for biological treatment.

【0022】このように、生物ろ床を並列に複数基例え
ば10基設置しておくと1基の洗浄が生物処理に及ぼす
時間的影響を十分の一にすることができることになる。
なお、凝集剤を洗浄排水流出管4の途中の凝集剤添加部
8で添加して沈澱による固液分離の効率を上げることが
できる。
As described above, if a plurality of biological filter beds are installed in parallel, for example, ten biological filters are provided, it is possible to reduce the time effect of the washing of one group on biological treatment.
The coagulant can be added at the coagulant addition section 8 in the middle of the washing drainage outflow pipe 4 to improve the efficiency of solid-liquid separation by precipitation.

【0023】本発明のろ過工程のろ過層Fのろ材として
図2に示したような中空状ろ材9を使用すると、ろ過層
Fの洗浄にはろ過槽の底部のドレンバルブ7を開いて槽
内の原水を全量ドレンするだけで簡単に洗浄でき、洗浄
用水を使用する必要がなく極めて好ましい。
When the hollow filter medium 9 as shown in FIG. 2 is used as the filter medium of the filter layer F in the filtration step of the present invention, the drain valve 7 at the bottom of the filter tank is opened to wash the filter layer F in the tank. It is extremely preferable that it can be easily washed by simply draining the entire raw water of (2) above, and it is not necessary to use washing water.

【0024】[0024]

【実施例】以下、本発明の具体的実施例を示すが、本発
明はこれに限定されるものではない。団地下水を対象に
して、図1に示した本発明のシステムによって下水の生
物処理を行った。本発明の生物処理の条件は以下のとお
りである。
EXAMPLES Specific examples of the present invention will be shown below, but the present invention is not limited thereto. Biological treatment of sewage was performed by using the system of the present invention shown in FIG. The conditions of the biological treatment of the present invention are as follows.

【0025】1)原水水質の平均品質 pH 7.2 SS 120mg/リットル BOD 146mg/リットル 水温 18℃1) Average quality of raw water quality pH 7.2 SS 120 mg / liter BOD 146 mg / liter Water temperature 18 ° C.

【0026】2)原水処理量 50m3 /日2) Raw water treatment amount 50 m 3 / day

【0027】3)ろ過層Fの構成 ろ材の種類 中空状ろ材(直径10mm、長さ
15mm) 材質 ポリプロピレン 充填層 高さ 2.5m (ろ過槽直径
0.365mφ) 流通方向 上向流 ろ過速度 500m/日
3) Structure of filtration layer F Type of filter medium Hollow filter medium (diameter 10 mm, length 15 mm) Material polypropylene Filled layer height 2.5 m (filter tank diameter 0.365 mφ) Flow direction upflow filtration speed 500 m / Day

【0028】4)好気性生物ろ床の構成(A1 、A2
3 、A4 、A5 ,A6 とも同じ) 設置基数 6基 ろ材種類 10×25×25mmの角状 材質 ポリウレタンフォーム ろ床 高さ 3m 直径 0.32mφ 流通方向 上向流 生物ろ過速度 100m/日 供給空気量 16Nm3 /日
4) Construction of aerobic filter bed (A 1 , A 2 ,
A 3, A 4, A 5 , also the A 6 same) installed base six filter media type 10 × 25 × 25 mm of angular material polyurethane foam filter bed height 3m diameter 0.32mφ flowing direction upflow biological filtration rate 100 m / Daily air supply 16 Nm 3 / day

【0029】5)好気性生物ろ床の洗浄方法(A1 、A
2 、A3 、A4 、A5 ,A6 とも同じ) 原水を供給しながら、各ユニットあたりの空気供給量を
20分間110リットル/分に増加させた(これは定常
処理時の空気供給量である11リットル/分の10倍に
相当)その後、洗浄排水バルブV1を開け、1.5時間
後にバルブを閉じた。この時点で処理水のSSは15m
g/リットル以下に回復していた。 6)処理結果 運転開始後1ヶ月目〜10ヶ月目の間の平均値で表す。 1.ろ過層Fのろ過処理水水質 pH 7.2 SS 28mg/リットル BOD 53mg/リットル 水温 18℃ 2.生物ろ床流出水の水質(定常処理時、各ユニット合
計の平均値) pH 6.9 SS 8mg/リットル BOD 9mg/リットル 水温 16℃ 3.生物ろ床 ろ過継続時間 68〜75時間 ろ床洗浄頻度 70時間に1回
5) Method of cleaning aerobic filter bed (A 1 , A
2, A 3, A 4, A 5, while supplying the same) raw water and A 6, the air supply amount per each unit was increased to 20 min 110 l / min (which is the amount of air supplied during the steady process Then, the washing drain valve V1 was opened, and after 1.5 hours, the valve was closed. SS of treated water is 15m at this point
It had recovered to g / liter or less. 6) Treatment results Expressed as an average value during the first to tenth months after the start of operation. 1. Filtration treatment water quality of the filtration layer F pH 7.2 SS 28 mg / liter BOD 53 mg / liter Water temperature 18 ° C 2. Water quality of biological filter runoff water (average value of each unit during steady treatment) pH 6.9 SS 8 mg / liter BOD 9 mg / liter Water temperature 16 ° C 3. Biological filter bed Filtration duration 68 to 75 hours Filter bed cleaning frequency Once every 70 hours

【0030】以上の処理結果は生物ろ床の洗浄に洗浄用
水を使用することなく、またろ過槽Fの洗浄もろ過処理
水のドレンのみによる洗浄で得られた結果である。また
処理中生物ろ床内にSSが蓄積するトラブルは認められ
なかった。
The above treatment results are obtained without using the washing water for washing the biological filter bed, and for washing the filter tank F by washing only the drain of the filtered treatment water. In addition, no trouble that SS was accumulated in the biological filter during the treatment was observed.

【0031】[0031]

【発明の効果】従来型BAFでは不可欠であった洗浄
用水槽、洗浄排水槽、洗浄ポンプ、洗浄水系統の配管な
どの付帯設備が全て不用になり、施設が単純化され建設
費用も低減できる。 洗浄用水を短時間に多量に供給するために必要であっ
た強力な洗浄ポンプが不用となり、運転コストも低減で
きる。
EFFECTS OF THE INVENTION All the ancillary equipment such as a washing water tank, a washing drainage tank, a washing pump, and piping for a washing water system, which are indispensable in the conventional BAF, are unnecessary, and the facility can be simplified and the construction cost can be reduced. The powerful washing pump, which was necessary to supply a large amount of washing water in a short time, becomes unnecessary, and the operating cost can be reduced.

【0032】生物処理ろ床の充填ろ材に立体網目構造
をもつ粒状物を用いたので微生物の保持量が従来型BA
Fの10倍と高く、処理中の目詰まりが少ないので生物
処理ろ床の通水速度を従来型BAFにおけるより4〜6
倍も速く採っても良好な水質を得ることができ、その上
ろ床洗浄の頻度も数日間に1回となり従来より大幅に少
なくできる。 生物処理工程の前段に独自のろ過手段を採用するシス
テム構成によって沈澱池が省略でき、生物処理ろ床の設
置面積も小さいことと相まって施設全体の省スペース効
果が大きい。
Since the granular material having a three-dimensional network structure was used as the filling filter material of the biological treatment filter bed, the amount of microorganisms retained was the conventional BA.
The water flow rate of the biological treatment filter is 4 to 6 times that of the conventional BAF because it is 10 times higher than that of F and less clogging during treatment.
Even if it is taken twice as fast, good water quality can be obtained, and the frequency of filter bed washing is once every several days, which is significantly less than in the past. The sedimentary basin can be omitted due to the system configuration that adopts a unique filtration means in the previous stage of the biological treatment process, and the installation area of the biological treatment filter bed is small, and the space saving effect of the entire facility is great.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の生物処理方法の具体的一例を説明する
ためのフロー図である。
FIG. 1 is a flow chart for explaining a specific example of a biological treatment method of the present invention.

【図2】本発明の中空状粒状ろ材の一例を示す斜視図で
ある。
FIG. 2 is a perspective view showing an example of a hollow granular filter medium of the present invention.

【図3】本発明の立体網目構造を有する粒状ろ材の一例
を示す斜視図である。
FIG. 3 is a perspective view showing an example of a granular filter medium having a three-dimensional network structure of the present invention.

【図4】従来の生物処理方法の典型的例を説明するため
のフロー図である。
FIG. 4 is a flow chart for explaining a typical example of a conventional biological treatment method.

【符号の説明】[Explanation of symbols]

1 ろ過槽 7 ドレンバル
ブ 2 ろ過水流出管 8 凝集剤注入
点 3 生物処理水流出管 A1 好気性生物
ろ床A1 4 洗浄排水流出管 A2 好気性生物
ろ床A2 5 洗浄排水還流管 B1 空気ブロア
1 6 流出管 B2 空気ブロア
2 1 空気散気管D1 13 ろ過槽 D2 空気散気管D2 14 浸漬ろ床 F ろ過層F 15 空気散気
管 V1 洗浄排水流出バルブV1 16 沈澱池 V2 洗浄排水流出バルブV2 17 原水流入
管 V3 処理水流出バルブV3 18 ブロア V4 処理水流出バルブV4 29 処理水流
出管 S 固液分離槽S 20 処理水貯
槽 P 還流用ポンプP 21 洗浄用水
ポンプ 9 中空状ろ材 22 洗浄排水貯
槽 10 格子状の開口部 23 洗浄排水
ポンプ 11 立体網目構造を有する粒状ろ材 24 洗浄水供
給配管 12 孔
1 Filtration tank 7 Drain valve 2 Filtration water outflow pipe 8 Coagulant injection point 3 Biotreatment water outflow pipe A 1 Aerobic biological filter bed A 1 4 Washing drainage pipe A 2 Aerobic biological filter bed A 2 5 Washing drainage reflux pipe B 1 Air blower B 1 6 Outflow pipe B 2 Air blower B 2 D 1 Air diffusion pipe D 1 13 Filtration tank D 2 Air diffusion pipe D 2 14 Immersion filter bed F Filtration layer F 15 Air diffusion pipe V 1 Wash drainage outflow valve V 1 16 Settling basin V 2 Wash drainage outflow valve V 2 17 Raw water inflow pipe V 3 Treated water outflow valve V 3 18 Blower V 4 Treated water outflow valve V 4 29 Treated water outflow pipe S Solid-liquid separation tank S 20 Treated water storage tank P reflux pump P 21 cleaning water pump 9 hollow filter medium 22 cleaning drainage storage tank 10 lattice-shaped opening 23 cleaning drainage pump 11 granular filter medium having a three-dimensional mesh structure 24 cleaning water supply pipe 12 holes

───────────────────────────────────────────────────── 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 B01D 39/02 9263−4D ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B01D 39/02 9263-4D

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 固液分離後の有機性汚水を、複数並列に
設けた好気性生物ろ床に供給すると共に、該ろ床の少な
くとも1基への供給空気量を所要時間増加させ、該操作
後のろ床流出水を所要時間前記固液分離工程に導くか、
または別途設けた固液分離装置へ導くことを特徴とする
有機性汚水の処理方法。
1. The organic wastewater after solid-liquid separation is supplied to a plurality of aerobic biological filter beds provided in parallel, and the amount of air supplied to at least one of the filter beds is increased for a required time to carry out the operation. The later filter bed effluent is led to the solid-liquid separation step for the required time,
Alternatively, a method for treating organic sewage, which is characterized in that it is led to a separately provided solid-liquid separation device.
【請求項2】 少なくとも固液分離手段と、複数並列に
設けた好気性生物ろ床と、該ろ床に空気を供給する手段
ならびに該濾床に送気する空気送風量を可変とすると共
に送気量変化対象ろ床を切替える手段と、送気量変化後
のろ床流出水を該固液分離手段または別途設けた固液分
離装置へ導く手段を有してなることを特徴とする有機性
汚水の処理装置。
2. A solid-liquid separation means, a plurality of aerobic biological filter beds provided in parallel, a means for supplying air to the filter bed, and a variable amount of air blown to the filter bed. An organic device comprising means for switching the filter bed subject to air volume change, and means for guiding the filter bed outflow water after air volume change to the solid-liquid separation means or a separately provided solid-liquid separation device. Sewage treatment equipment.
JP4765692A 1992-02-04 1992-02-04 Organic wastewater treatment method and treatment apparatus Expired - Fee Related JP2572327B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4765692A JP2572327B2 (en) 1992-02-04 1992-02-04 Organic wastewater treatment method and treatment apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4765692A JP2572327B2 (en) 1992-02-04 1992-02-04 Organic wastewater treatment method and treatment apparatus

Publications (2)

Publication Number Publication Date
JPH05212394A true JPH05212394A (en) 1993-08-24
JP2572327B2 JP2572327B2 (en) 1997-01-16

Family

ID=12781304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4765692A Expired - Fee Related JP2572327B2 (en) 1992-02-04 1992-02-04 Organic wastewater treatment method and treatment apparatus

Country Status (1)

Country Link
JP (1) JP2572327B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3115099U (en) * 2005-07-26 2005-11-04 龍文堂印刷株式会社 Cold ear cover
JP3115098U (en) * 2005-07-26 2005-11-04 有限会社 ケーステージ Table decoration table

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3115099U (en) * 2005-07-26 2005-11-04 龍文堂印刷株式会社 Cold ear cover
JP3115098U (en) * 2005-07-26 2005-11-04 有限会社 ケーステージ Table decoration table

Also Published As

Publication number Publication date
JP2572327B2 (en) 1997-01-16

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