JPH11244868A - Coagulating sedimentation apparatus for sewage - Google Patents

Coagulating sedimentation apparatus for sewage

Info

Publication number
JPH11244868A
JPH11244868A JP10053900A JP5390098A JPH11244868A JP H11244868 A JPH11244868 A JP H11244868A JP 10053900 A JP10053900 A JP 10053900A JP 5390098 A JP5390098 A JP 5390098A JP H11244868 A JPH11244868 A JP H11244868A
Authority
JP
Japan
Prior art keywords
tank
sewage
sludge
vessel
flocs
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.)
Pending
Application number
JP10053900A
Other languages
Japanese (ja)
Inventor
Kenichiro Mizuno
健一郎 水野
Takao Shudo
孝雄 周藤
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP10053900A priority Critical patent/JPH11244868A/en
Publication of JPH11244868A publication Critical patent/JPH11244868A/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Biological Treatment Of Waste Water (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Filtration Of Liquid (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce the amt. of the flocculating agent to be added and to decrease the amt. of the sludge to be generated by disposing filter layers formed by depositing filter media for adhering flocs formed by addition of the flocculating agent into a settling vessel and separating the same on network-like supplying members into the settling vessel apart a prescribed spacing from the inside bottom of the settling vessel. SOLUTION: The apparatus is so constituted that the sewage supplied through an inflow pipe 2 is passed perpendicularly in an agitation vessel 1, a floc forming vessel 9 and the settling vessel 4. The flocculating agent is supplied through an injection pipe 7 into the agitation vessel 1 and part of the sludge withdrawn from the settling vessel 4 is returned into the agitation vessel 1 through a sludge collecting pipe 5 and a sludge circulating pump 6. The sewage and the flocculating agent are mixed and agitated in the agitation vessel 1 and thereafter, the mixture is led out into the floc forming vessel 9 where the sludge is grown to the flocs. The flocs are then supplied to the settling vessel 4 and the flocs grown there are captured by the filter layers 13 disposed with the network-like supporting member 14 in the bottom. The sludge layer adhered and grown on the surface of the filter media 13a are peeled and settled by gravity.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、廃水を処理する
ための水処理装置に関するものであり、特に水処理分野
における汚水の凝集沈澱処理装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus for treating wastewater, and more particularly to a coagulation and sedimentation treatment apparatus for wastewater in the field of water treatment.

【０００２】[0002]

【従来の技術】水処理分野における汚水の凝集沈澱処理
は、汚水を急速攪拌槽において凝集剤を添加しながら高
速で攪拌し、次いで、フロック形成槽において、汚水中
の懸濁物質である汚泥をフロックに成長させ、次いで、
沈澱槽において成長したフロックを沈澱させてこれを除
去することにより行われる。2. Description of the Related Art In the flocculation and sedimentation treatment of sewage in the field of water treatment, sewage is stirred at high speed while adding a flocculant in a rapid stirring tank, and then sludge, which is a suspended substance in the sewage, is stirred in a floc forming tank. Growing into flock, then
This is done by sedimenting the flocs grown in the sedimentation tank and removing them.

【０００３】図２は、従来の汚水凝集沈澱処理装置の概
要を示す系統図である。図２に示すように、汚水を流入
管２を通じて攪拌槽１に導くと共に、凝集剤を、注入管
７を通して攪拌槽１内に供給し、更に、必要に応じて、
沈澱槽４の下部に堆積した汚泥の一部を、沈澱槽４の底
面に取り付けられた集泥管５および汚泥循環ポンプ６に
よって引き抜き、これを、汚水流入管２の途中に設けた
汚泥循環管３を通し攪拌槽１に内に凝集核として供給す
る。そして、攪拌槽１内に供給された汚水を、凝集剤お
よび場合によっては凝集核と共に、攪拌槽１内に設けら
れた攪拌機８によって、機械的に急速に混合し攪拌す
る。FIG. 2 is a system diagram showing an outline of a conventional sewage coagulation / sedimentation treatment apparatus. As shown in FIG. 2, the wastewater is introduced into the stirring tank 1 through the inflow pipe 2, and the coagulant is supplied into the stirring tank 1 through the injection pipe 7.
A part of the sludge deposited in the lower part of the settling tank 4 is pulled out by a sludge collection pipe 5 and a sludge circulation pump 6 attached to the bottom of the settling tank 4, and the sludge circulation pipe provided in the middle of the wastewater inflow pipe 2. 3 and supplied to the stirring tank 1 as coagulation nuclei. Then, the sewage supplied into the stirring tank 1 is mechanically and rapidly mixed and stirred together with the coagulant and possibly the coagulation nucleus by the stirrer 8 provided in the stirring tank 1.

【０００４】次いで、上記凝集剤等が混合された汚水
は、フロック形成槽９内に導かれ、フロック形成槽９内
において、汚水中の懸濁物質である汚泥をフロックに成
長させた上、沈澱槽４内に供給する。沈澱槽４内には傾
斜板（または傾斜管）１０が設置されており、成長した
フロックは、傾斜板１０に衝突して沈澱し除去され、一
方、処理水は集水管１１を通じて排出される。沈澱槽４
の底部に堆積したフロックの汚泥は、排泥ポンプ１２に
よって集泥管５より系外に排出される。Next, the sewage mixed with the flocculant and the like is introduced into a floc forming tank 9, where sludge, which is a suspended substance in the sewage, is grown into flocs and then settled. Supply into the tank 4. An inclined plate (or inclined tube) 10 is provided in the sedimentation tank 4, and the grown floc collides with the inclined plate 10 to be settled and removed, while the treated water is discharged through a collecting pipe 11. Settling tank 4
Sludge deposited on the bottom of the flock is discharged from the sludge collecting pipe 5 to the outside of the system by the sludge pump 12.

【０００５】[0005]

【発明が解決しようとする課題】上述した従来の汚水の
凝集沈澱処理装置には、次のような問題がある。 １）フロック形成槽９および沈澱槽４に要する面積およ
び容積が大きく、その設置のために多大の敷地面積を必
要とする。 ２）安定した浄水処理を行うために、処理すべき汚水の
水質またはその水量など装置の運転条件の変化に応じ
て、凝集剤の注入ポンプなどを頻繁に制御する必要があ
り、装置の運転維持管理などのために多大な労力を要す
る。 ３）安定した浄水処理を行うために、汚水の水質によっ
ては過剰の凝集剤を添加する必要があり、凝集剤コスト
の増大および発生する汚泥量の増大を招く。 ４）沈澱槽４内に設置された傾斜板１０の表面上に藻類
が繁殖するため、定期的に装置を休止し、沈澱池内の水
を全量排出した上、傾斜板１０の掃除を行う必要があ
る。 ５）汚水中のアンモニア性窒素およびマンガンの除去率
が低い。The above-mentioned conventional apparatus for coagulating sedimentation of sewage has the following problems. 1) The area and volume required for the floc forming tank 9 and the sedimentation tank 4 are large, and the installation requires a large site area. 2) In order to perform stable water purification treatment, it is necessary to frequently control the coagulant injection pump and the like according to changes in the operating conditions of the apparatus such as the quality of the wastewater to be treated or the amount of the water, and maintain the operation of the apparatus. A lot of labor is required for management. 3) In order to perform stable water purification treatment, it is necessary to add an excessive coagulant depending on the quality of the sewage, which causes an increase in the cost of the coagulant and an increase in the amount of generated sludge. 4) Since algae grow on the surface of the inclined plate 10 installed in the sedimentation tank 4, it is necessary to periodically stop the apparatus, discharge all the water in the sedimentation basin, and clean the inclined plate 10. is there. 5) The removal rate of ammonia nitrogen and manganese in wastewater is low.

【０００６】従って、この発明の目的は、上述した問題
を解決し、凝集剤の添加量が少なくて済み、発生汚泥量
の低減が図られ、従来よりも装置全体をコンパクト化す
ることができ、藻類の繁殖などによる沈澱槽の掃除回数
が減少し、装置の運転維持管理などに要する労力が少な
く、しかも、処理された水の水質を従来よりも向上させ
ることができる汚水の凝集沈澱処理装置を提供するもの
である。Accordingly, an object of the present invention is to solve the above-mentioned problems, to reduce the amount of coagulant added, to reduce the amount of generated sludge, and to make the whole apparatus more compact than before. A coagulation and sedimentation treatment system for sewage that can reduce the number of times the sedimentation tank needs to be cleaned due to the propagation of algae, reduces the labor required for operation and maintenance of the system, and can improve the quality of treated water than before. To provide.

【０００７】[0007]

【課題を解決するための手段】請求項１に記載の発明
は、処理すべき汚水を、これに添加された凝集剤と共に
攪拌し、汚水中の懸濁物質を凝集してフロックに成長さ
せるための攪拌槽と、前記攪拌槽から排出されたフロッ
クの存在する汚水を収容し、汚水中から前記フロックを
沈澱させてこれを分離し除去するための沈澱槽と、前記
沈澱槽内に沈澱した懸濁物質を系外に排出するためのポ
ンプとからなる汚水の凝集沈澱処理装置において、前記
沈澱槽内には、前記汚水中のフロックを付着させ且つこ
れを分離すると共に、前記汚水中の溶解性汚濁物質の一
部を除去する機能を有する多数のろ材が、前記沈澱槽の
内底面から所定間隔をあけて取付けられた網目状支持部
材等によって落下および流出することなく充填され、ろ
層が形成されていることに特徴を有するものである。According to the first aspect of the present invention, waste water to be treated is stirred together with a flocculant added thereto to aggregate suspended substances in the waste water to grow into flocs. , A sedimentation tank for containing the sewage containing flocs discharged from the agitation tank, sedimenting the flocs from the sewage, separating and removing the flocs, and a suspension sediment in the sedimentation tank. A flocculation and sedimentation treatment device for sewage, comprising a pump for discharging suspended substances out of the system, wherein floc in the sewage is adhered to and separated from the sedimentation tank, A large number of filter media having a function of removing a part of pollutants are filled without falling and flowing out by a mesh-like support member or the like attached at a predetermined interval from the inner bottom surface of the settling tank to form a filter layer. Has been Those having features and.

【０００８】請求項２に記載の発明は、前記攪拌槽およ
び前記沈澱槽は、実質的に垂直に設けられ、前記攪拌槽
および前記沈澱槽内における水の流れが垂直方向である
ことに特徴を有するものである。The invention according to claim 2 is characterized in that the stirring tank and the precipitation tank are provided substantially vertically, and the flow of water in the stirring tank and the precipitation tank is vertical. Have

【０００９】請求項３に記載の発明は、前記沈澱槽内に
充填される前記ろ材が、１．０超、２．０以下の比重を
有し、且つ、５ｍｍ超の外径を有する、多孔質の粒状ま
たは中空円筒状物質であることに特徴を有するものであ
る。According to a third aspect of the present invention, the filter medium filled in the sedimentation tank has a specific gravity of more than 1.0 and 2.0 or less and an outer diameter of more than 5 mm. It is characterized in that it is a granular or hollow cylindrical material.

【００１０】請求項４に記載の発明は、前記沈澱槽内に
設けられた前記網目状支持部材等は、その少なくとも一
部が、スクリーンまたはグリッドからなっており、その
目開きの大きさが３ｍｍ以上で且つ前記ろ材の外径寸法
を超えない範囲内であることに特徴を有するものであ
る。According to a fourth aspect of the present invention, at least a part of the mesh-like support member or the like provided in the precipitation tank is formed of a screen or a grid, and the size of the mesh is 3 mm. It is characterized in that it is within the range not exceeding the outer diameter of the filter medium.

【００１１】請求項５に記載の発明は、前記攪拌槽と前
記沈澱槽との間にはフロック形成槽が設けられ、且つ、
前記沈澱槽内に堆積した汚泥の一部を前記攪拌槽に循環
させるための汚泥循環機構が設けられていることに特徴
を有するものである。The invention according to claim 5 is characterized in that a floc forming tank is provided between the stirring tank and the precipitation tank, and
It is characterized in that a sludge circulation mechanism for circulating a part of the sludge deposited in the settling tank to the stirring tank is provided.

【００１２】[0012]

【発明の実施の形態】この発明の装置においては、沈澱
槽内に、汚水中のフロックを付着させ且つこれを分離す
ると共に、汚水中の溶解性汚濁物質の一部を除去する機
能を有する多数のろ材が、沈澱槽の内底面から所定間隔
をあけて取付けられた網目状支持部材によって、落下お
よび流出することなく充填され、ろ層が形成されてい
る。BEST MODE FOR CARRYING OUT THE INVENTION In the apparatus of the present invention, a flocculant having a function of adhering and separating floc in sewage in a sedimentation tank and removing a part of soluble pollutants in the sewage is provided. The filter medium is filled without falling and flowing out by a mesh-like support member attached at a predetermined interval from the inner bottom surface of the precipitation tank, and a filter layer is formed.

【００１３】沈澱槽内においてろ層を形成するろ材は、
その比重が１．０超、２．０以下で、且つ、その外径が
５ｍｍ超である、多孔質の粒状または中空円筒状の、例
えばプラスチックス系またはセラミックス系物質である
ことが好ましい。[0013] The filter medium forming the filter layer in the precipitation tank is:
It is preferably a porous granular or hollow cylindrical material having a specific gravity of more than 1.0, 2.0 or less, and an outer diameter of more than 5 mm, for example, a plastics or ceramics material.

【００１４】即ち、ろ材を、多孔質の粒状または中空円
筒状物質とすることによって、フロックの有効衝突断面
積が、従来の傾斜板に比べ数十倍から数百倍に増大す
る。従って、フロックがろ材表面に衝突してこれに付着
する性能が向上し、汚水中からのフロックの分離効率が
高まると共に、ろ材表面に微生物も付着しやすくなり、
これによって、汚水中のマンガン、アンモニア性窒素、
かび臭等の微生物による除去効果が生ずる。That is, by using a porous granular or hollow cylindrical material as the filter medium, the effective collision cross-sectional area of the floc is increased by several tens to several hundreds as compared with the conventional inclined plate. Therefore, the performance of the flocs colliding with and adhering to the surface of the filter medium is improved, the efficiency of the separation of the flocs from the sewage is increased, and the microorganisms also easily adhere to the surface of the filter medium,
This allows manganese, ammoniacal nitrogen,
The effect of removing microorganisms such as musty odor occurs.

【００１５】ろ材の比重を１．０超とすることによっ
て、汚水中にろ材が浮遊することはなく、ろ層上部にグ
リッド等のろ材流出防止装置を設置する必要がなくな
る。一方、ろ材の比重を２．０以下とすることによっ
て、グリッドのようなろ層構成部材にかかる荷重を低減
することができる。By setting the specific gravity of the filter medium to more than 1.0, the filter medium does not float in the sewage, and it becomes unnecessary to install a filter medium outflow prevention device such as a grid above the filter layer. On the other hand, by setting the specific gravity of the filter medium to 2.0 or less, the load applied to the filter layer constituting member such as the grid can be reduced.

【００１６】ろ材を、多孔質の粒状または中空円筒状と
することによって、ろ層の空隙率が大になり、これによ
って、ろ層でのフロック捕捉量を増大させることができ
る。ろ材の外径は５ｍｍ超であることが必要である。ろ
材の外径が５ｍｍ以下であると、沈澱槽の汚水流入側で
ある、ろ層下部５０ｃｍ程度の範囲でフロックの大部分
がろ材に捕捉されるために、凝集沈澱分離の進行に伴っ
て、フロックの付着したろ材が密に詰まり水が流れにく
くなる。その結果、損失水頭が急激に増大し、長時間安
定して運転することができなくなる。By forming the filter medium into a porous granular or hollow cylindrical form, the porosity of the filter layer is increased, whereby the amount of floc trapped in the filter layer can be increased. The outer diameter of the filter medium needs to be more than 5 mm. When the outer diameter of the filter medium is 5 mm or less, most of the floc is trapped by the filter medium in the range of about 50 cm below the filter layer, which is the sewage inflow side of the settling tank. The filter medium to which the flock has adhered becomes densely packed, making it difficult for water to flow. As a result, the head loss increases rapidly, and it becomes impossible to operate stably for a long time.

【００１７】沈澱槽内に、その内底面から所定間隔をあ
けて取付けられた網目状支持部材は、例えばプラスチッ
クス製で、その少なくとも一部がスクリーンまたはグリ
ッドからなっており、その目開きの大きさは、３ｍｍ以
上で且つろ材の外径を超えない寸法であることが必要で
ある。これによって、ろ層で捕捉されたフロックは、グ
リッド上に沈積することなく沈澱槽の内底部に集積し、
排泥ポンプによって系外に排出することができ、一方、
網目状支持部材からのろ材の落下および流出を防止する
ことができる。The mesh-like support member mounted in the settling tank at a predetermined distance from the inner bottom surface thereof is made of, for example, plastics, at least a part of which is formed of a screen or a grid. It is necessary that the length is not less than 3 mm and does not exceed the outer diameter of the filter medium. In this way, the flocs trapped in the filter layer accumulate on the inner bottom of the settling tank without depositing on the grid,
It can be discharged out of the system by a mud pump, while
It is possible to prevent the filter medium from falling and flowing out of the mesh-like support member.

【００１８】次に、この発明の装置を図面を参照しなが
ら説明する。図１は、この発明の汚水凝集沈澱処理装置
の概要を示す系統図である。図１に示すように、攪拌槽
１、フロック形成槽９および沈澱槽４がこの順序で実質
的に垂直に設けられており、流入管２を通じて供給され
た汚水は、攪拌槽１、フロック形成槽９および沈澱槽４
内を実質的に垂直方向に流れる。Next, the apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram showing an outline of a sewage coagulation sedimentation treatment apparatus of the present invention. As shown in FIG. 1, a stirring tank 1, a floc forming tank 9 and a sedimentation tank 4 are provided substantially vertically in this order. 9 and sedimentation tank 4
Flow in a substantially vertical direction.

【００１９】攪拌槽１内には、注入管７を通して凝集剤
が供給され、更に、必要に応じ、集泥管５および汚泥循
環ポンプ６によって沈澱槽４から引き抜かれた汚泥の一
部が、汚泥循環管３を通し攪拌槽１に内に凝集核として
供給される。攪拌槽１内に供給された汚水は、凝集剤等
と共に、攪拌槽１内に設けられた攪拌機８によって、機
械的に急速に混合し攪拌された後、フロック形成槽９内
に導かれ、フロック形成槽９内において、汚水中の懸濁
物質である汚泥をフロックに成長させた上、沈澱槽４内
に供給される。なお、フロック形成槽９は、必ずしも設
ける必要はなく、攪拌槽１内において汚水中の汚泥がフ
ロックに成長されておれば、汚水を、攪拌槽１から直ち
に沈澱槽４内に供給するようにしてもよい。A flocculant is supplied into the stirring tank 1 through an injection pipe 7 and, if necessary, a part of the sludge pulled out of the precipitation tank 4 by a sludge collection pipe 5 and a sludge circulation pump 6 is converted into sludge. The coagulation nuclei are supplied to the stirring tank 1 through the circulation pipe 3. The sewage supplied into the stirring tank 1 is mechanically rapidly mixed and stirred by the stirrer 8 provided in the stirring tank 1 together with the flocculant and the like, and then guided into the floc forming tank 9, where the floc is formed. In the forming tank 9, the sludge, which is a suspended substance in the sewage, is grown into flocs and then supplied into the settling tank 4. The floc forming tank 9 is not necessarily provided. If the sludge in the sewage is grown into flocs in the stirring tank 1, the sewage is immediately supplied from the stirring tank 1 into the sedimentation tank 4. Is also good.

【００２０】沈澱槽４内には、汚水中のフロックを付着
させ且つこれを分離すると共に、汚水中の溶解性汚濁物
質の一部を除去する機能を有する多数のろ材１３ａが、
沈澱槽４内に、その内底面４ａから所定間隔をあけて取
付けられた網目状支持部材１４によって、落下および流
出することなく充填され、ろ層１３が形成されている。
ろ層１３を形成するろ材１３ａは、その比重が１．０
超、２．０以下で、且つ、その外径が５ｍｍ超である、
多孔質の粒状または中空円筒状の、例えばプラスチック
ス系またはセラミックス系物質からなっている。In the sedimentation tank 4, a number of filter media 13a having a function of adhering and separating flocs in the sewage and removing a part of the soluble pollutants in the sewage are provided.
The sedimentation tank 4 is filled without falling and flowing out by a mesh-like support member 14 attached at a predetermined interval from the inner bottom surface 4a, and a filter layer 13 is formed.
The filter medium 13a forming the filter layer 13 has a specific gravity of 1.0
More than 2.0, and the outer diameter is more than 5 mm,
It is made of a porous granular or hollow cylindrical material, for example, a plastics or ceramics material.

【００２１】成長したフロックは、ろ層１３のろ材１３
ａに衝突し、ろ材１３ａの表面に付着してある程度の付
着層が形成されると、ろ材１３ａの表面から剥離し、網
目状支持部材１４を通って沈澱槽４の内底面４ａに沈澱
し、汚水中から除去される。The grown floc is filtered from the filter medium 13 of the filter layer 13.
a, and adheres to the surface of the filter medium 13a to form a certain amount of adhered layer, peels off from the surface of the filter medium 13a, and precipitates on the inner bottom surface 4a of the settling tank 4 through the mesh-like support member 14, Removed from sewage.

【００２２】このようにしてフロックが除去された処理
水は、集水管１１を通って沈澱槽４から排出される。一
方、沈澱槽４の内底面４ａに堆積した汚泥（フロック）
は、集泥管５から排泥ポンプ１２によって引き抜かれ系
外に排出される。また、前述したように、必要に応じ、
集泥管５および汚泥循環ポンプ６によって沈澱槽４から
引き抜かれた汚泥の一部は、汚泥循環管３を通し攪拌槽
１に内に凝集核として供給される。The treated water from which the flocs have been removed in this way is discharged from the sedimentation tank 4 through the collecting pipe 11. On the other hand, sludge (flock) deposited on the inner bottom surface 4a of the settling tank 4
Is withdrawn from the mud collecting pipe 5 by a mud discharging pump 12 and discharged out of the system. Also, as mentioned above, if necessary,
Part of the sludge pulled out of the sedimentation tank 4 by the sludge collection pipe 5 and the sludge circulation pump 6 is supplied to the stirring tank 1 through the sludge circulation pipe 3 as flocculation nuclei.

【００２３】[0023]

【実施例】次に、この発明を実施例により説明する。図
１に示した本発明の装置を使用し汚水の浄化処理を行っ
た。ろ材として、ポリプロピレンにアルミナが添加され
発泡処理された、比重が１．０５で、外径８ｍｍ、内径
６ｍｍ、長さ１０ｍｍの中空円筒状多孔質物質を使用し
た。網目状支持部材１４として、目開きの大きさが６ｍ
ｍであるプラスチックス製のグリッドを使用した。Next, the present invention will be described with reference to embodiments. Purification treatment of sewage was performed using the apparatus of the present invention shown in FIG. A hollow cylindrical porous material having a specific gravity of 1.05, an outer diameter of 8 mm, an inner diameter of 6 mm, and a length of 10 mm, which was obtained by adding alumina to polypropylene and performing foaming treatment, was used as a filter medium. The mesh size of the mesh-like support member 14 is 6 m.
A plastics grid was used.

【００２４】このような本発明の装置と、比較のための
図２に示した従来の装置を使用し、表１に示す運転条件
により汚水を処理した。凝集剤としては、ポリ塩化アル
ミニウムを使用した。なお、表１に示す水面積負荷率
は、下記により算出した。Using such an apparatus of the present invention and a conventional apparatus shown in FIG. 2 for comparison, sewage was treated under the operating conditions shown in Table 1. As the coagulant, polyaluminum chloride was used. The water area load factor shown in Table 1 was calculated as follows.

【００２５】水面積負荷率＝（流入水量）／（沈澱池の
幅）／（沈澱池の長さ）Water area load factor = (inflow water amount) / (settling basin width) / (settling basin length)

【００２６】[0026]

【表１】 [Table 1]

【００２７】上述のようにして浄化処理を行った処理水
の水質を分析し、その濁度、および、処理水中のアンモ
ニア性窒素およびマンガンの含有量を調べた結果を、表
２に示す。Table 2 shows the results of analyzing the water quality of the treated water subjected to the purification treatment as described above, and examining the turbidity and the contents of ammonia nitrogen and manganese in the treated water.

【００２８】[0028]

【表２】 [Table 2]

【００２９】表２から明らかなように、本発明の装置を
使用した場合には、従来装置を使用した場合に比較して
処理水の濁度は向上し、且つ、処理水中のアンモニア性
窒素およびマンガンの含有量は顕著に減少した。As is clear from Table 2, when the apparatus of the present invention is used, the turbidity of the treated water is improved as compared with the case where the conventional apparatus is used, and the ammonia nitrogen and the ammonia nitrogen in the treated water are improved. The manganese content was significantly reduced.

【００３０】[0030]

【発明の効果】以上述べたように、この発明の汚水凝集
沈澱処理装置によれば、沈澱槽内に、汚水中のフロック
を付着させ且つこれを分離すると共に、汚水中の溶解性
汚濁物質の一部を除去する機能を有する多数のろ材が、
沈澱槽の内底面から所定間隔をあけて取付けられた網目
状支持部材により充填され、ろ層が形成されていること
により、これによって処理された水の水質が従来よりも
優れたものになると共に、凝集剤の添加量は少なくて済
み、発生汚泥量の低減が図られ、従来よりも装置全体を
コンパクト化することができ、藻類の繁殖などによる沈
澱槽の掃除回数が減少し、装置の運転維持管理などに要
する労力も少なくて済む等、多くの工業上有用な効果が
もたらされる。As described above, according to the apparatus for coagulating sedimentation of sewage of the present invention, flocs in sewage are adhered to and separated from the sedimentation tank, and at the same time, soluble pollutants in sewage are removed. Numerous filter media with the function of removing part,
Filled by a mesh-like support member attached at a predetermined distance from the inner bottom surface of the settling tank, and the filter layer is formed, the water quality of the treated water becomes better than before and In addition, the amount of coagulant added is small, the amount of generated sludge is reduced, the whole device can be made more compact than before, the number of times of cleaning the sedimentation tank due to the propagation of algae, etc., and the operation of the device Many industrially useful effects are obtained, such as less labor required for maintenance and the like.

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

【図１】この発明の汚水凝集沈澱処理装置の概要を示す
系統図である。FIG. 1 is a system diagram showing an outline of a sewage coagulation sedimentation treatment apparatus of the present invention.

【図２】従来の汚水凝集沈澱処理装置の概要を示す系統
図である。FIG. 2 is a system diagram showing an outline of a conventional sewage coagulation / sedimentation treatment apparatus.

【符号の説明】 １ 攪拌槽 ２ 流入管 ３ 汚泥循環管 ４ 沈澱槽 ５ 集泥管 ６ 汚泥循環ポンプ ７ 凝集剤注入管 ８ 攪拌機 ９ フロック形成槽 10 傾斜板 11 集水管 12 排泥ポンプ 13 ろ層 13a ろ材 14 網目状支持部材[Description of Signs] 1 Stirring tank 2 Inflow pipe 3 Sludge circulation pipe 4 Sedimentation tank 5 Sludge collection pipe 6 Sludge circulation pump 7 Coagulant injection pipe 8 Stirrer 9 Flock formation tank 10 Inclined plate 11 Water collection pipe 12 Drainage pump 13 Filtration layer 13a Filter media 14 Mesh support member

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ０１Ｄ 21/24 Ｂ０１Ｄ 21/24 Ｒ 24/02 Ｃ０２Ｆ 3/06 24/12 3/10 Ａ 24/22 Ｂ０１Ｄ 23/10 Ａ Ｃ０２Ｆ 3/06 23/18 3/10 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI B01D 21/24 B01D 21/24 R 24/02 C02F 3/06 24/12 3/10 A 24/22 B01D 23/10 A C02F 3/06 23/18 3/10

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 処理すべき汚水を、これに添加された凝
集剤と共に攪拌し、汚水中の懸濁物質を凝集してフロッ
クに成長させるための攪拌槽と、前記攪拌槽から排出さ
れたフロックの存在する汚水を収容し、汚水中から前記
フロックを沈澱させてこれを分離し除去するための沈澱
槽と、前記沈澱槽内に沈澱した懸濁物質を系外に排出す
るためのポンプとからなる汚水の凝集沈澱処理装置にお
いて、 前記沈澱槽内には、前記汚水中のフロックを付着させ且
つこれを分離すると共に、前記汚水中の溶解性汚濁物質
の一部を除去する機能を有する多数のろ材が、前記沈澱
槽の内底面から所定間隔をあけて取付けられた網目状支
持部材等によって落下および流出することなく充填さ
れ、ろ層が形成されていることを特徴とする、汚水の凝
集沈澱処理装置。An agitation tank for agitating sewage to be treated together with a flocculant added thereto to aggregate suspended substances in the sewage to grow into flocs, and a floc discharged from the agitating tank. A sedimentation tank for containing the existing sewage, sedimenting the floc from the sewage, separating and removing the floc, and a pump for discharging the suspended solids precipitated in the sedimentation tank out of the system. In the coagulation and sedimentation treatment apparatus, there are provided a plurality of flocculants having a function of attaching and separating flocs in the sewage and removing a part of soluble pollutants in the sewage in the sedimentation tank. A filter medium is filled without falling and flowing out by a mesh-like support member or the like attached at a predetermined interval from the inner bottom surface of the settling tank, and a filter layer is formed. Processing equipment . 【請求項２】 前記攪拌槽および前記沈澱槽は、実質的
に垂直に設けられ、前記攪拌槽および前記沈澱槽内にお
ける水の流れが垂直方向である、請求項１に記載の処理
装置。2. The treatment apparatus according to claim 1, wherein the stirring tank and the precipitation tank are provided substantially vertically, and the flow of water in the stirring tank and the precipitation tank is vertical. 【請求項３】 前記沈澱槽内に充填される前記ろ材は、
その比重が１．０超、２．０以下で且つその外径が５ｍ
ｍ超の、多孔質の粒状または中空円筒状物質である、請
求項１または２に記載の処理装置。3. The filter medium filled in the precipitation tank,
Its specific gravity is more than 1.0, 2.0 or less and its outer diameter is 5m
The processing apparatus according to claim 1, wherein the processing apparatus is a porous granular or hollow cylindrical material having a particle size of more than m. 【請求項４】 前記沈澱槽内に設けられた前記網目状支
持部材等は、その少なくとも一部が、スクリーンまたは
グリッドからなっており、その目開きの大きさは３ｍｍ
以上で且つ前記ろ材の外径寸法を超えない範囲内であ
る、請求項１から３の何れか１つに記載の処理装置。4. The mesh-like support member or the like provided in the precipitation tank has at least a part thereof formed of a screen or a grid, and the size of the mesh is 3 mm.
The processing apparatus according to any one of claims 1 to 3, which is within the range not exceeding the outer diameter dimension of the filter medium. 【請求項５】 前記攪拌槽と前記沈澱槽との間にフロッ
ク形成槽が設けられ、且つ、前記沈澱槽内に堆積した汚
泥の一部を前記攪拌槽に循環させるための汚泥循環機構
が設けられている、請求項１から４の何れか１つに記載
の処理装置。5. A floc forming tank is provided between the stirring tank and the sedimentation tank, and a sludge circulation mechanism for circulating a part of the sludge accumulated in the sedimentation tank to the stirring tank is provided. The processing device according to any one of claims 1 to 4, wherein the processing device is configured to:
JP10053900A 1998-03-05 1998-03-05 Coagulating sedimentation apparatus for sewage Pending JPH11244868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10053900A JPH11244868A (en) 1998-03-05 1998-03-05 Coagulating sedimentation apparatus for sewage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10053900A JPH11244868A (en) 1998-03-05 1998-03-05 Coagulating sedimentation apparatus for sewage

Publications (1)

Publication Number Publication Date
JPH11244868A true JPH11244868A (en) 1999-09-14

Family

ID=12955607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10053900A Pending JPH11244868A (en) 1998-03-05 1998-03-05 Coagulating sedimentation apparatus for sewage

Country Status (1)

Country Link
JP (1) JPH11244868A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006218388A (en) * 2005-02-10 2006-08-24 Shimizu Gokin Seisakusho:Kk Water treat method and water treatment apparatus
WO2011030485A1 (en) * 2009-09-08 2011-03-17 株式会社水処理技術研究所 Flocculation precipitation treatment method
KR101052727B1 (en) 2011-01-03 2011-08-01 주식회사 링콘테크놀로지 Baffle of wastewater treatment for improving efficiency of sedimentation
JP2013520301A (en) * 2010-02-25 2013-06-06 ヴェオリア ウォーター ソリューションズ アンド テクノロジーズ サポート Ballast flocculation and precipitation water treatment system and water treatment process with simplified sludge recirculation device
WO2016169396A1 (en) * 2015-04-23 2016-10-27 刘洋 Bioreaction wastewater treatment device
CN108815890A (en) * 2018-07-31 2018-11-16 上海景青绿环境科技有限公司 A kind of coagulative precipitation device
CN109372063A (en) * 2018-12-14 2019-02-22 青岛润通源水务工程设备有限责任公司 A kind of no negative pressure pipe network pressurizing current stabilization supply equipment
CN112076510A (en) * 2020-05-24 2020-12-15 刁蔷薇 Textile machine wastewater treatment device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006218388A (en) * 2005-02-10 2006-08-24 Shimizu Gokin Seisakusho:Kk Water treat method and water treatment apparatus
WO2011030485A1 (en) * 2009-09-08 2011-03-17 株式会社水処理技術研究所 Flocculation precipitation treatment method
JP2011056355A (en) * 2009-09-08 2011-03-24 Osaka Univ Flocculation/sedimentation treatment method
JP2013520301A (en) * 2010-02-25 2013-06-06 ヴェオリア ウォーター ソリューションズ アンド テクノロジーズ サポート Ballast flocculation and precipitation water treatment system and water treatment process with simplified sludge recirculation device
KR101052727B1 (en) 2011-01-03 2011-08-01 주식회사 링콘테크놀로지 Baffle of wastewater treatment for improving efficiency of sedimentation
WO2016169396A1 (en) * 2015-04-23 2016-10-27 刘洋 Bioreaction wastewater treatment device
CN108815890A (en) * 2018-07-31 2018-11-16 上海景青绿环境科技有限公司 A kind of coagulative precipitation device
CN109372063A (en) * 2018-12-14 2019-02-22 青岛润通源水务工程设备有限责任公司 A kind of no negative pressure pipe network pressurizing current stabilization supply equipment
CN112076510A (en) * 2020-05-24 2020-12-15 刁蔷薇 Textile machine wastewater treatment device

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