JP5710413B2 - Precipitation tank and wastewater treatment method using the same - Google Patents
Precipitation tank and wastewater treatment method using the same Download PDFInfo
- Publication number
- JP5710413B2 JP5710413B2 JP2011167997A JP2011167997A JP5710413B2 JP 5710413 B2 JP5710413 B2 JP 5710413B2 JP 2011167997 A JP2011167997 A JP 2011167997A JP 2011167997 A JP2011167997 A JP 2011167997A JP 5710413 B2 JP5710413 B2 JP 5710413B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- rotating shaft
- tank body
- wastewater
- precipitation
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1252—Cylindrical tanks with horizontal axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
- B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
- B01D21/06—Settling tanks with single outlets for the separated liquid with moving scrapers with rotating scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
- B01D21/20—Driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2427—The feed or discharge opening located at a distant position from the side walls
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
- C02F3/1284—Mixing devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
-
- 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
Description
本発明は沈殿槽及びそれを用いた廃水の処理方法に関し、より詳細には、含窒素有機物および／または含硫黄有機物を含有する廃水の処理に好適な沈殿槽及びそれを用いた廃水の処理方法に関するものである。 The present invention relates to a precipitation tank and a method for treating waste water using the same, and more specifically, a precipitation tank suitable for treating waste water containing nitrogen-containing organic substances and / or sulfur-containing organic substances, and a method for treating waste water using the same. It is about.
例えば、食品、飲料水、医薬品及び農薬等の製造にあたっては、含窒素有機物および／または含硫黄有機物等を含む廃水が大量に発生する。発生した廃水の処理には、例えば、必要に応じて中和した廃水を沈殿槽中で撹拌して、廃水に含まれていた固形物及び廃水を中和することにより生成した固形物等を沈殿させ、得られた上澄み液を曝気槽中で微生物等と処理することにより、前記上澄み液に含まれる含窒素有機物および／または含硫黄有機物等を分解する活性汚泥法が用いられている（例えば特許文献１を参照）。 For example, in the production of food, drinking water, pharmaceuticals, agricultural chemicals, etc., a large amount of waste water containing nitrogen-containing organic substances and / or sulfur-containing organic substances is generated. In the treatment of the generated wastewater, for example, the wastewater neutralized as necessary is stirred in a precipitation tank, and the solids contained in the wastewater and the solids generated by neutralizing the wastewater are precipitated. Then, an activated sludge method is used to decompose nitrogen-containing organic substances and / or sulfur-containing organic substances contained in the supernatant liquid by treating the obtained supernatant liquid with microorganisms in an aeration tank (for example, patents) Reference 1).
曝気槽中で分解される前の含窒素有機物および／または含硫黄有機物等は強い臭気を放つため、前記沈殿槽周辺の作業環境等を悪くする場合がある。このため、沈殿槽を密閉型として臭気が外部に放散するのを防止していた。かかる密閉型の沈殿槽では、これまで、撹拌翼を回転させるモータは回転軸上または回転軸近傍に設けられていた。 Since nitrogen-containing organic substances and / or sulfur-containing organic substances before being decomposed in the aeration tank give off a strong odor, the working environment around the precipitation tank may be deteriorated. For this reason, the settling tank is used as a sealed type to prevent the odor from being diffused to the outside. In such a closed type precipitation tank, the motor for rotating the stirring blade has been provided on or near the rotating shaft.
しかしながら、沈殿槽を大型化すると、大きな撹拌動力が必要となりモータも大型化せざるを得ない。モータが大型化するとその重量が増すためモータを回転軸上または回転軸近傍に設けられなくなる。 However, when the sedimentation tank is enlarged, a large stirring power is required and the motor must be enlarged. When the motor is increased in size, its weight increases, so that the motor cannot be provided on or near the rotary shaft.
そこで、本発明は、処理施設周辺に強い臭気を放散させることなく、且つ、沈殿槽上にモータを設けることなく、含窒素有機物および／または含硫黄有機物を含有する廃水等を処理できる沈殿槽等を提供することをその目的とするものである。 Accordingly, the present invention provides a sedimentation tank capable of treating waste water containing nitrogen-containing organic substances and / or sulfur-containing organic substances without dissipating strong odor around the treatment facility and without providing a motor on the precipitation tank. The purpose is to provide.
前記目的を達成する本発明に係る沈殿槽は、廃水導入口及び上澄み液排出口を備え、略円筒形状で上面開口の槽本体と、前記槽本体の上面開口を覆う蓋部材と、前記槽本体の中心軸に沿って設けられ、前記蓋部材から上部が突出した回転軸と、前記回転軸の下部に設けられた撹拌翼と、前記槽本体の上端部に沿って自走可能なローラと、前記ローラと前記回転軸とを繋ぐアームとを具備し、前記回転軸の上面に前記回転軸と同心円状に、車輪を有する環状部材を設け、前記蓋部材を、前記槽本体の外周壁と前記環状部材との間に設け、前記ローラを前記槽本体の上端部に沿って自走させることにより、前記アームを旋回させて前記回転軸を回転させ、前記回転軸に設けられた前記撹拌翼を回転させるとともに、前記回転軸の回転に対して前記車輪を回転させることによって前記環状部材及び前記蓋部材を定位置に留まらせることを特徴とする。 The sedimentation tank according to the present invention that achieves the above object comprises a waste water inlet and a supernatant liquid outlet, a substantially cylindrical tank body having an upper surface opening, a lid member covering the upper surface opening of the tank body, and the tank body A rotating shaft that is provided along the central axis of the lid member, the upper part protruding from the lid member, a stirring blade that is provided at the lower part of the rotating shaft, a roller that is capable of self-propelled along the upper end of the tank body, An arm connecting the roller and the rotating shaft , an annular member having a wheel concentrically with the rotating shaft is provided on an upper surface of the rotating shaft, the lid member, the outer peripheral wall of the tank body, and the The agitating blade provided on the rotating shaft is provided by rotating the rotating shaft by rotating the arm by moving the roller along the upper end of the tank body, and rotating the rotating shaft. is rotated, the relative rotation of the rotary shaft Characterized in that to stay in position the annular member and the lid member by rotating the wheel.
ここで、前記蓋部材として、布状部材から構成される物を用いてもよい。 Here, you may use the thing comprised from a cloth-like member as said cover member.
また、前記撹拌翼の下部に、前記槽本体の底面に溜まった沈殿物を前記槽本体の中央部に掻き寄せる掻き寄せ部材を設けるのが好ましい。 Moreover, it is preferable that a scraping member that scrapes the sediment accumulated on the bottom surface of the tank main body toward the central portion of the tank main body is provided below the stirring blade.
また本発明に係る廃水の処理方法は、含窒素有機物および／または含硫黄有機物を含有する廃水を沈殿槽の中で撹拌する沈殿工程と、前記沈殿工程で得られた上澄み液を曝気槽中で微生物処理する浄化工程とを含む廃水の処理方法であって、前記沈殿槽が前記のいずれかに記載の沈殿槽であることを特徴とする。 The wastewater treatment method according to the present invention includes a precipitation step in which wastewater containing nitrogen-containing organic substances and / or sulfur-containing organic substances is stirred in a precipitation tank, and the supernatant obtained in the precipitation process in an aeration tank. A wastewater treatment method including a purification step for treating microorganisms, wherein the settling tank is any one of the settling tanks described above.
本発明に係る沈殿槽及び廃水の処理方法によれば、処理施設周辺に強い臭気を放散させることがない。また、回転軸上または回転軸近傍にモータを設けることなく、しかも小さな回転力で撹拌翼を回転させることができるので沈殿槽を大型化できる。 According to the settling tank and the wastewater treatment method according to the present invention, strong odor is not diffused around the treatment facility. Moreover, since the stirring blade can be rotated with a small rotational force without providing a motor on or near the rotating shaft, the size of the settling tank can be increased.
以下、本発明に係る沈殿槽及び処理方法について図に基づいて詳述するが、本発明はこれらの実施形態に何ら限定されるものではない。 Hereinafter, although the precipitation tank and the processing method which concern on this invention are explained in full detail based on figures, this invention is not limited to these embodiment at all.
図１に、本発明に係る沈殿槽の一例を示す垂直断面図を、図２に沈殿槽の平面図をそれぞれ示す。図１の沈殿槽Ｄは、円筒状で上面開口の槽本体１を有し、槽本体１の底面は中央部に向かって下り勾配とされ、底面中央部には上方に向かって突出した柱状部１３が形成されている。柱状部１３の下端外周には、後述する掻き寄せブレード（掻き寄せ部材）４１によって掻き寄せられた沈殿物が溜まる環状凹部１４が形成されている。そして、下面開口の円筒状で、周側面が鉄骨網目構造の回転軸３が柱状部１３に外挿されている。柱状部１３の上面と回転軸３の内上面との間にはスラスト軸受けが介装されており、回転軸３は柱状部１３に対して回転自在とされている。回転軸３の下部外周には４つの撹拌翼４ａ，４ｂ，４ｃ，４ｄ（以下、「撹拌翼４」と総称して記すことがある。）が周方向に等間隔で取り付けられている（図２を参照）。撹拌翼４ａ，４ｃは槽本体１の半径とほぼ同じ長さを有し、撹拌翼４ｂ、４ｄは槽本体１の半径の約半分長さを有する。それぞれの撹拌翼４の下部には、半径方向に所定間隔で、且つ半径方向に対して所定角度を有するように複数の掻き寄せブレード４１が設けられている。 FIG. 1 is a vertical sectional view showing an example of a precipitation tank according to the present invention, and FIG. 2 is a plan view of the precipitation tank. The sedimentation tank D of FIG. 1 has a tank body 1 having a cylindrical shape with an opening on the upper surface. The bottom surface of the tank body 1 is inclined downward toward the center, and a columnar portion protruding upward at the center of the bottom surface. 13 is formed. On the outer periphery of the lower end of the columnar portion 13, an annular recess 14 is formed in which the sediment scraped by a scraping blade (scraping member) 41 described later accumulates. The rotating shaft 3 having a cylindrical shape with a bottom opening and a steel mesh structure on the peripheral side surface is extrapolated to the columnar portion 13. A thrust bearing is interposed between the upper surface of the columnar portion 13 and the inner upper surface of the rotating shaft 3, and the rotating shaft 3 is rotatable with respect to the columnar portion 13. Four stirring blades 4a, 4b, 4c, and 4d (hereinafter sometimes collectively referred to as “stirring blade 4”) are attached to the outer periphery of the lower portion of the rotating shaft 3 at equal intervals in the circumferential direction (see FIG. 2). The stirring blades 4 a and 4 c have substantially the same length as the radius of the tank body 1, and the stirring blades 4 b and 4 d have about half the radius of the tank body 1. A plurality of scraping blades 41 are provided below the respective stirring blades 4 at predetermined intervals in the radial direction and at a predetermined angle with respect to the radial direction.
回転軸３の上部には、アーム５の一方端が固定され、アーム５の他方端は、槽本体１の外周壁の上端面を自走するローラ５１に接続している。これにより、モータＭによってローラ５１を槽本体１の外周壁の上端面を周方向に走行させると、アーム５及び回転軸３を介して撹拌翼４が回転する。 One end of the arm 5 is fixed to the upper part of the rotating shaft 3, and the other end of the arm 5 is connected to a roller 51 that runs on the upper end surface of the outer peripheral wall of the tank body 1. Thus, when the roller 51 is caused to travel on the upper end surface of the outer peripheral wall of the tank body 1 by the motor M in the circumferential direction, the stirring blade 4 rotates through the arm 5 and the rotating shaft 3.
槽本体１の柱状部１３の中心部には、廃水導入管１７が軸方向下方から上方に向かって内挿されており、柱状部１３の上部に形成された廃水導入口１１から槽本体１に廃水が流入するようになっている。一方、槽本体１の外周壁の上部には、周方向の等間隔で複数の排出口１２が形成されており、排出口１２から半径方向外方に延出するように溢出堰１６が形成されている。そして、槽本体１の外周壁の外周には集水樋１５が設けられており、溢出堰１６から溢れ出た槽本体１内の上層の上澄み液は集水樋１５で集められ次工程（例えば浄化工程）へ送られる。 A waste water introduction pipe 17 is inserted in the center of the columnar part 13 of the tank body 1 from the lower side in the axial direction upward, and the tank main body 1 is connected to the waste water introduction port 11 formed at the upper part of the columnar part 13. Wastewater flows in. On the other hand, a plurality of discharge ports 12 are formed at equal intervals in the circumferential direction at the upper portion of the outer peripheral wall of the tank body 1, and an overflow weir 16 is formed so as to extend radially outward from the discharge port 12. ing. A drainage basin 15 is provided on the outer periphery of the outer peripheral wall of the tank body 1, and the supernatant liquid of the upper layer in the tank body 1 overflowing from the overflow weir 16 is collected in the drainage tank 15 and is collected in the next step (for example, To the purification process).
一方、槽本体１の底面に沈殿した沈殿物は、撹拌翼４に取り付けられた掻き寄せブレード４１の回転によって環状凹部１４に掻き寄せられる。そして、環状凹部１４に掻き寄せられた沈殿物は、環状凹部１４の底面に接続している引抜管１８を介して不図示のポンプで吸引除去される。 On the other hand, the sediment deposited on the bottom surface of the tank body 1 is scraped to the annular recess 14 by the rotation of the scraping blade 41 attached to the stirring blade 4. Then, the sediment scraped to the annular recess 14 is sucked and removed by a pump (not shown) through a drawing tube 18 connected to the bottom surface of the annular recess 14.
図３に沈殿槽上部の部分断面図を、図４に布状部材２を取り外した状態の沈殿槽の平面図を、図５に、図１の円Ａ内の拡大部分斜視図をそれぞれ示す。回転軸３の上面には環状部材６１が回転軸３と同心円状に設けられている。環状部材６１には周方向に等間隔で複数の車輪６２が取り付けられている。そして、図４に示すように、槽本体１の外周壁の上部内周面と環状部材６１の外周面との間には、複数本のワイヤー７が周方向に等間隔で取り付けられている。これら複数本のワイヤー７によって環状部材６１は定位置に安定して固定され、アーム５の回転によって回転軸３が回転した場合、環状部材６１は定位置に留まり車輪６２が回転する。なお、ワイヤー７に代えてパイプなど従来公知の線状部材や棒状部材を用いても構わない。 FIG. 3 shows a partial cross-sectional view of the upper part of the settling tank, FIG. 4 shows a plan view of the settling tank with the cloth-like member 2 removed, and FIG. 5 shows an enlarged partial perspective view in the circle A of FIG. An annular member 61 is provided concentrically with the rotating shaft 3 on the upper surface of the rotating shaft 3. A plurality of wheels 62 are attached to the annular member 61 at equal intervals in the circumferential direction. As shown in FIG. 4, a plurality of wires 7 are attached at equal intervals in the circumferential direction between the upper inner peripheral surface of the outer peripheral wall of the tank body 1 and the outer peripheral surface of the annular member 61. The annular member 61 is stably fixed at a fixed position by the plurality of wires 7. When the rotating shaft 3 is rotated by the rotation of the arm 5, the annular member 61 remains at the fixed position and the wheel 62 rotates. In place of the wire 7, a conventionally known linear member such as a pipe or a rod-shaped member may be used.
図３に示すように、ワイヤー７の上方の、槽本体１の外周壁の上部内周面と環状部材６１の外周面との間には、槽本体１の上面開口を覆うように布状部材（蓋部材）２が張設されている。また、布状部材２の途中部には下方に垂れ下がった袋状の掛かり布部２１が形成され、この掛かり布部２１内をワイヤー７が挿通している。掛かり布部２１を介して布状部材２をワイヤー７に掛止することによって、布状部材２のばたつきが抑えられ安定した張設状態が維持される。 As shown in FIG. 3, between the upper inner peripheral surface of the outer peripheral wall of the tank body 1 and the outer peripheral surface of the annular member 61 above the wire 7, a cloth-like member covers the upper surface opening of the tank body 1. (Cover member) 2 is stretched. Further, a bag-like hanging cloth portion 21 that hangs downward is formed in the middle of the cloth-like member 2, and the wire 7 is inserted through the hanging cloth portion 21. By hooking the cloth-like member 2 on the wire 7 via the hanging cloth portion 21, fluttering of the cloth-like member 2 is suppressed and a stable tensioned state is maintained.
このように、本発明の沈殿槽Ｄでは、槽本体１の上面開口を布状部材２で覆っているので、廃水から生じる強い臭気が処理施設周辺に放散されること防止される。また、槽本体１の外周壁の上端面をローラを自走させることによってアーム５と回転軸３とを介して撹拌翼４を回転させるので、「てこ」の原理によって小さな回転力で撹拌翼４を回転させることができ、槽本体１の大型化も可能となる。 Thus, in the sedimentation tank D of this invention, since the upper surface opening of the tank main body 1 is covered with the cloth-like member 2, it is prevented that the strong odor which arises from wastewater is dissipated around processing facilities. Further, since the stirring blade 4 is rotated via the arm 5 and the rotating shaft 3 by causing the roller to self-propell the upper end surface of the outer peripheral wall of the tank body 1, the stirring blade 4 is rotated with a small rotational force by the principle of “lever”. The tank body 1 can be enlarged.
なお、以上説明した実施形態では、蓋部材２として布状部材を用いていたが、廃水の臭気を透過しない材料であればその材質に特に限定はなく、金属材料や樹脂材料であっても構わない。ただし、組立性や取扱性などの点からは布状部材が好ましい。また、前記実施形態におけるアーム５は、回転軸３とローラ５１とを接続する形状であったが、例えば、アーム５の長さを槽本体１の直径以上の長さとし、アーム５の略中央において回転軸３と接続するようにしてもよい。この場合、アーム５の両端に設けるローラ５１は、両方又は一方を自走式とすればよい。 In the embodiment described above, a cloth-like member is used as the lid member 2, but the material is not particularly limited as long as the material does not transmit wastewater odor, and may be a metal material or a resin material. Absent. However, a cloth-like member is preferable from the viewpoint of assembling property and handling property. In addition, the arm 5 in the above embodiment has a shape that connects the rotating shaft 3 and the roller 51. You may make it connect with the rotating shaft 3. FIG. In this case, both or one of the rollers 51 provided at both ends of the arm 5 may be self-propelled.
次に、本発明に係る廃水の処理方法について説明する。図６に、本発明に係る廃水の処理方法の一例を示す工程図を示す。食品、飲料水、医薬品及び農薬等の製造過程で生じる含窒素有機物および／または含硫黄有機物等を含む廃水は、まず中和槽において中和される。次に、第１沈殿槽において、廃水に含まれている固形物及び廃水の中和により生成した固形物等は沈殿して除去され、上澄み液は曝気槽へ送られる（沈殿工程）。曝気槽では、第１沈殿槽から送られてきた上澄み液と微生物（活性汚泥）とは空気（酸素）を供給されながら混合される。これにより、前記上澄み液に含まれる含窒素有機物および／または含硫黄有機物等が微生物によって分解される（浄化工程）。そして、混合された液は第２沈殿槽に送られる。第２沈殿槽では、活性汚泥が水より比重がやや重いことを利用して、混合液が上澄み液と活性汚泥とに分離され、上澄み液は処理水として、必要により消毒処理等された後、河川に放流される。一方、第２沈殿槽の底面に沈殿した活性汚泥は、その一部は不図示のポンプで曝気槽に返送され、残りは余剰汚泥として汚泥処理施設等に送られ処理される。 Next, the wastewater treatment method according to the present invention will be described. FIG. 6 is a process chart showing an example of a wastewater treatment method according to the present invention. Waste water containing nitrogen-containing organic substances and / or sulfur-containing organic substances generated in the production process of food, drinking water, pharmaceuticals, agricultural chemicals and the like is first neutralized in a neutralization tank. Next, in the first settling tank, the solids contained in the wastewater and the solids produced by the neutralization of the wastewater are precipitated and removed, and the supernatant is sent to the aeration tank (precipitation step). In the aeration tank, the supernatant liquid sent from the first precipitation tank and the microorganisms (activated sludge) are mixed while being supplied with air (oxygen). As a result, nitrogen-containing organic substances and / or sulfur-containing organic substances contained in the supernatant are decomposed by microorganisms (purification step). And the mixed liquid is sent to a 2nd sedimentation tank. In the second sedimentation tank, the activated sludge has a specific gravity slightly higher than that of water, and the mixed liquid is separated into a supernatant liquid and activated sludge. Released into the river. On the other hand, a part of the activated sludge precipitated on the bottom surface of the second settling tank is returned to the aeration tank by a pump (not shown), and the remaining is sent to a sludge treatment facility or the like as surplus sludge.
このような本発明の処理方法における大きな特徴は、第１沈殿槽として、前記説明した本発明の沈殿槽を用いることにある。第１沈殿槽に貯留されている廃水には、含窒素有機物および／または含硫黄有機物等が含まれているため強い臭気を放つが、本発明の処理方法では、槽本体の上面開口を蓋部材で覆った本発明の沈殿槽を用いるので、処理施設周辺に強い臭気を放散させることがない。また、本発明の沈殿槽では、槽本体の上端部に沿って自走するローラによって撹拌翼を回転させるので、小さな回転力で撹拌翼を回転させることができ沈殿槽を大型化できる。これにより、大量の廃水処理ができるようになる。 A major feature of the treatment method of the present invention is that the above-described precipitation tank of the present invention is used as the first precipitation tank. The waste water stored in the first sedimentation tank emits a strong odor because it contains nitrogen-containing organic substances and / or sulfur-containing organic substances. In the treatment method of the present invention, the upper surface opening of the tank body is covered with a lid member. Since the precipitation tank of the present invention covered with is used, strong odor is not diffused around the treatment facility. Moreover, in the precipitation tank of this invention, since a stirring blade is rotated with the roller which self-propels along the upper end part of a tank main body, a stirring blade can be rotated with a small rotational force, and a precipitation tank can be enlarged. As a result, a large amount of waste water can be treated.
本発明に係る沈殿槽及び廃水の処理方法によれば、処理施設周辺に強い臭気を放散させることがない。また、回転軸上または回転軸近傍にモータを設けることなく、しかも小さな回転力で撹拌翼を回転させることができので沈殿槽を大型化でき有用である。 According to the settling tank and the wastewater treatment method according to the present invention, strong odor is not diffused around the treatment facility. Further, the stirring blade can be rotated with a small rotational force without providing a motor on or in the vicinity of the rotating shaft, so that the sedimentation tank can be enlarged and useful.
１ 槽本体
２ 布状部材（蓋部材）
３ 回転軸
４ 回転翼
４ａ，４ｂ，４ｃ，４ｄ 回転翼
５ アーム
Ｄ 沈殿槽
１１ 廃水導入口
１２ 排出口
４１ 掻き寄せブレード（掻き寄せ部材）
５１ ローラ
1 Tank body 2 Cloth-like member (lid member)
DESCRIPTION OF SYMBOLS 3 Rotating shaft 4 Rotating blade 4a, 4b, 4c, 4d Rotating wing 5 Arm D Precipitation tank 11 Wastewater inlet 12 Discharge port 41 Scraping blade (scraping member)
51 Laura
Claims (4)
前記回転軸の上面に前記回転軸と同心円状に、車輪を有する環状部材を設け、
前記蓋部材を、前記槽本体の外周壁と前記環状部材との間に設け、
前記ローラを前記槽本体の上端部に沿って自走させることにより、前記アームを旋回させて前記回転軸を回転させ、前記回転軸に設けられた前記撹拌翼を回転させるとともに、
前記回転軸の回転に対して前記車輪を回転させることによって前記環状部材及び前記蓋部材を定位置に留まらせることを特徴とする沈殿槽。 Provided with a waste water inlet and a supernatant liquid outlet, a tank body having a substantially cylindrical shape and having an upper surface opening; a lid member covering the upper surface opening of the tank body; and a central axis of the tank body; A rotating shaft with an upper part protruding; a stirring blade provided at a lower part of the rotating shaft; a roller capable of self-propelling along the upper end of the tank body; and an arm connecting the roller and the rotating shaft. And
An annular member having wheels is provided on the upper surface of the rotating shaft concentrically with the rotating shaft,
The lid member is provided between the outer peripheral wall of the tank body and the annular member,
By rotating the roller along the upper end of the tank body, the arm is rotated to rotate the rotating shaft, and the stirring blade provided on the rotating shaft is rotated .
A settling tank characterized in that the annular member and the lid member remain in place by rotating the wheel with respect to rotation of the rotating shaft .
前記沈殿槽が請求項１〜３のいずれか１項に記載の沈殿槽であることを特徴とする廃水の処理方法。 Treatment of wastewater comprising a precipitation step in which wastewater containing nitrogen-containing organic substances and / or sulfur-containing organic substances is stirred in a precipitation tank, and a purification process in which the supernatant obtained in the precipitation process is subjected to microbial treatment in an aeration tank A method,
The method for treating wastewater, wherein the settling tank is the settling tank according to any one of claims 1 to 3.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011167997A JP5710413B2 (en) | 2011-08-01 | 2011-08-01 | Precipitation tank and wastewater treatment method using the same |
| PCT/JP2012/059521 WO2013018400A1 (en) | 2011-08-01 | 2012-04-06 | Settling tank and method for treating waste water using same |
| TW101114144A TW201307214A (en) | 2011-08-01 | 2012-04-20 | Sedimentation tank and method of treating wastewater by use of the sedimentation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011167997A JP5710413B2 (en) | 2011-08-01 | 2011-08-01 | Precipitation tank and wastewater treatment method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2013031789A JP2013031789A (en) | 2013-02-14 |
| JP5710413B2 true JP5710413B2 (en) | 2015-04-30 |
Family
ID=47628942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011167997A Active JP5710413B2 (en) | 2011-08-01 | 2011-08-01 | Precipitation tank and wastewater treatment method using the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5710413B2 (en) |
| TW (1) | TW201307214A (en) |
| WO (1) | WO2013018400A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955511B (en) * | 2017-04-05 | 2019-05-17 | 绍兴柯桥江滨水处理有限公司 | Sewage primary sedimentation processing system |
| CN107469418A (en) * | 2017-09-09 | 2017-12-15 | 沧源县云矿金腊资源有限公司 | A kind of pulp thickener |
| CN107823923A (en) * | 2017-10-31 | 2018-03-23 | 天津科艾福特科技有限公司 | A kind of radical sedimentation basin that can effectively prevent precipitum from being accumulated in bottom of pond |
| CN109647017B (en) * | 2019-02-23 | 2021-01-05 | 浙江华锦建筑装饰设计有限公司 | Energy-saving emission-reducing town sewage treatment system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61278310A (en) * | 1985-06-04 | 1986-12-09 | Nippon Gesuidou Jigyodan | Sludge scraper |
| JP2002177966A (en) * | 2000-12-11 | 2002-06-25 | Kurita Water Ind Ltd | Dephosphorizing agent and dephosphorization method as well as dewatering treatment method for sludge |
| JP4158082B2 (en) * | 2002-01-23 | 2008-10-01 | 充弘 藤原 | Solid-liquid separator |
| JP2005193165A (en) * | 2004-01-08 | 2005-07-21 | Ebara Corp | Method and apparatus for treating organic sewage by using aerobic filter bed |
| JP4537268B2 (en) * | 2005-06-22 | 2010-09-01 | 株式会社神戸製鋼所 | Gravity settling tank |
| JP2008062161A (en) * | 2006-09-06 | 2008-03-21 | Eacle Kk | Thickener |
-
2011
- 2011-08-01 JP JP2011167997A patent/JP5710413B2/en active Active
-
2012
- 2012-04-06 WO PCT/JP2012/059521 patent/WO2013018400A1/en active Application Filing
- 2012-04-20 TW TW101114144A patent/TW201307214A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013031789A (en) | 2013-02-14 |
| TW201307214A (en) | 2013-02-16 |
| WO2013018400A1 (en) | 2013-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5710413B2 (en) | Precipitation tank and wastewater treatment method using the same | |
| CN102036922A (en) | Decentralized source separation sewage system | |
| KR100860290B1 (en) | Apparatus for removing sludge of round shapesludgegather in settling pond | |
| CN109626451A (en) | Decentralized type sewage processing equipment and application method with unpowered chlorination equipment | |
| CN106630482B (en) | Sewage treatment device | |
| CN208577553U (en) | One kind being convenient for clean sewage treatment active carbon filter | |
| CN202237411U (en) | Sludge scraping and sucking device for sedimentation tank | |
| JP5213209B2 (en) | Soil agitator | |
| KR100822715B1 (en) | Agitator of anaerobic digester | |
| CN210915659U (en) | Industrial wastewater treatment sedimentation tank | |
| JP5764182B2 (en) | Method for removing residue from a stirring device of a methane fermentation tank, and methane fermentation tank capable of easily removing residue from a stirring device | |
| FR3023549A1 (en) | WATER TREATMENT OR INDUSTRIAL EFFLUENT INSTALLATION COMPRISING AGITATOR MEANS HAVING COMMON TRAINING MEANS | |
| CN104176878B (en) | Integrated unpowered biological rotating disk is processed the method and apparatus of decentralized sewage | |
| CN207667270U (en) | Package plant | |
| JP6490462B2 (en) | Excrement disposal system | |
| KR20170003069U (en) | Anaerobic digestion tank for removing scum | |
| CN210646158U (en) | Breed sewage degassing unit | |
| CN211999018U (en) | Combined type biological rotating disc processing device | |
| CN211111633U (en) | Septic tank beneficial to cleaning | |
| KR20210055490A (en) | Filth treatment system | |
| JP5712457B1 (en) | Odor generation prevention device | |
| US20140367332A1 (en) | Septic system and method of treating sewage and grease | |
| CA2932166C (en) | Filtering system for removing chemicals from fluids | |
| CN209872714U (en) | Sludge treatment equipment for aeration biological rotating disc | |
| RU79808U1 (en) | SURFACE CLEANING DEVICE FOR WATER DRAINAGE TRAYS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20140121 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20141104 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20141216 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20150225 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20150304 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5710413 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |