JP5094151B2 - Solid-liquid separator - Google Patents

Solid-liquid separator Download PDF

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JP5094151B2
JP5094151B2 JP2007030290A JP2007030290A JP5094151B2 JP 5094151 B2 JP5094151 B2 JP 5094151B2 JP 2007030290 A JP2007030290 A JP 2007030290A JP 2007030290 A JP2007030290 A JP 2007030290A JP 5094151 B2 JP5094151 B2 JP 5094151B2
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sewage
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liquid separation
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separation tank
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JP2008194580A (en
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圭佑 村上
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株式会社Km環境技研
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本発明は、例えば、家畜の糞尿や養殖水槽の循環水などの固形物を含んだ汚水から固形物を分離除去するための固液分離装置に関するものである。   The present invention relates to a solid-liquid separation device for separating and removing solid matter from sewage containing solid matter such as livestock manure and circulating water in aquaculture tanks.

従来、家畜の尿汚水を処理する方法としては、図5に示すように、まず、畜舎51から排出され原水槽52に貯留された糞尿を沈殿槽53に送り、糞などの固形物を沈降させた後、その液相部分を揚水ポンプ54にて固液分離装置55に送って尿汚水を固液分離し、この固液分離された尿汚水を、その表面に好気性微生物が養生付着された多孔質体から成る担体56aが設置された曝気槽56に送るとともに、この曝気槽56内にブロワー等の空気ポンプ56bにより空気を吐出させながら、上記尿汚水中の有機物を上記微生物により分解する方法が知られている。この分解処理された尿汚水は、濾過槽57にて水質汚染物質を吸着して分離した後、河川などに放流される。また、上記糞などの固形物は別途発酵処理するなどして堆肥として再利用される。
図6は固液分離装置55の一構成例を示す図である。この固液分離装置55は、その断面形状が略三角形でその幅が下部にいくに従って小さくなるすり鉢型の固液分離槽55aと、この固液分離槽55a内に糞尿等の汚水を噴出させる汚水流入管55bと、上記固液分離槽55aの上部に設けられたフィルター55cとを備えたもので、上記固液分離槽55a内に送られた汚水中の比重の重い固形物は上記汚水流入管55bから噴出する汚水によって発生する旋回流により、上記固液分離槽55aの底部に運ばれ、排出管55dから汚物回収槽60に送られる。一方、上記汚水中の比重の軽い固形物は固液分離槽55a上部に浮上し、フィルタ55cに捕獲されるので、上記固液分離槽55aの上部側から上記フィルタ55cを通過した汚水を取出すようにすれば、固形物の除去された汚水を上記図5に示した曝気槽56のような後処理設備に送ることができる。
このとき、図6に示すように、上記固液分離装置55の後段に、加圧浮上浄化装置70を設けて、上記フィルタ55cを通って上記固液分離槽55aの上部から送られてくる汚水を浄化するようにすれば、上記固液分離装置55では取りきれなかった汚水中の微細な固形物についても分離除去することができる。
上記加圧浮上浄化装置70は、槽本体71内に設けられた気泡噴出管72に図示しないエアパイプから空気を送り込んで上記槽本体71内に気泡を噴出させて、上記微細な固形物を気泡とともに上記槽本体71の液面までに浮上させ、上記槽本体71の液面に浮遊する上記微細な固形物が付着した水泡を、上部槽本体71中央部に立設された排出管73から排出させるもので、上記微細な固形物が除去された汚水は、上記槽本体71の下部から取出され、後処理工程である、表面に嫌気性の微生物が養生付着された接触材が設置された酸化接触槽80に送られ、更に浄化される(例えば、特許文献1参照)。
特開2005−230717号公報
Conventionally, as a method of treating livestock urine sewage, as shown in FIG. 5, first, manure discharged from a barn 51 and stored in a raw water tank 52 is sent to a settling tank 53 to settle solid matter such as feces. After that, the liquid phase portion was sent to the solid-liquid separation device 55 by the pump 60 to separate the urine sewage, and the solid-liquid separated urine sewage was adhered to the surface by aerobic microorganisms. A method of decomposing organic matter in the urine wastewater with the microorganisms while sending the air to an aeration tank 56 in which a carrier 56a made of a porous material is installed and discharging air into the aeration tank 56 by an air pump 56b such as a blower. It has been known. This decomposed urine sewage is adsorbed and separated by water pollutants in the filtration tank 57 and then discharged into a river or the like. In addition, the solid matter such as feces is reused as compost by, for example, separately fermenting it.
FIG. 6 is a diagram showing a configuration example of the solid-liquid separation device 55. The solid-liquid separation device 55 has a mortar-shaped solid-liquid separation tank 55a whose cross-sectional shape is substantially triangular and whose width decreases toward the lower part, and sewage for ejecting sewage such as manure into the solid-liquid separation tank 55a. An inflow pipe 55b and a filter 55c provided at the upper part of the solid-liquid separation tank 55a are provided, and the solid matter having a high specific gravity in the sewage sent into the solid-liquid separation tank 55a is the sewage inflow pipe. The swirl flow generated by the sewage ejected from 55b is carried to the bottom of the solid-liquid separation tank 55a and sent to the filth collection tank 60 from the discharge pipe 55d. On the other hand, the solid matter having a low specific gravity in the sewage floats on the upper part of the solid-liquid separation tank 55a and is captured by the filter 55c, so that the sewage that has passed through the filter 55c is taken out from the upper side of the solid-liquid separation tank 55a. By doing so, the sewage from which the solid matter has been removed can be sent to an aftertreatment facility such as the aeration tank 56 shown in FIG.
At this time, as shown in FIG. 6, the sewage sent from the upper part of the solid-liquid separation tank 55a through the filter 55c is provided with a pressure levitation purification device 70 in the subsequent stage of the solid-liquid separation device 55. If it is made to purify | clean, the fine solid substance in waste water which could not be removed with the said solid-liquid separator 55 can also be separated and removed.
The pressurized levitation purification device 70 feeds air from an air pipe (not shown) into a bubble ejection pipe 72 provided in the tank body 71 to eject the bubbles into the tank body 71, and causes the fine solid matter together with the bubbles. The water bubbles floated up to the liquid level of the tank body 71 and the fine solid matter floating on the liquid level of the tank body 71 is discharged from the discharge pipe 73 erected at the center of the upper tank body 71. The sewage from which the fine solid matter has been removed is taken out from the lower part of the tank body 71 and is an after-treatment step, in which an oxidation contact with anaerobic microorganisms attached to the surface is installed. It is sent to the tank 80 and further purified (see, for example, Patent Document 1).
JP 2005-230717 A

しかしながら、上記固液分離装置55による固液分離処理に加えて上記加圧浮上浄化装置70による曝気処理を行った場合でも、汚水の濾過処理は一回だけであるので、汚水中の固形物を十分に除去することが困難であった。特に、加圧浮上浄化装置70では、気泡に微細な固形物を付着させて浮上させるため、一回の濾過では上記処理した汚水中に微細な固形物が残存してしまうといった問題点があった。なお、上記各装置55,70を複数段設けるようにすれば、汚水中の固形物を十分に除去することは可能であるが、処理設備が大型化してしまうので、現実的な方法とはいえない。   However, even when the aeration process is performed by the pressurized levitation purification apparatus 70 in addition to the solid-liquid separation process by the solid-liquid separation apparatus 55, the filtration process of the sewage is performed only once. It was difficult to remove it sufficiently. In particular, the pressurized levitation purification apparatus 70 has a problem in that fine solids remain in the treated sewage after one filtration because fine solids adhere to the bubbles and float. . If the devices 55 and 70 are provided in a plurality of stages, it is possible to sufficiently remove the solid matter in the sewage, but the processing equipment is increased in size, which is a realistic method. Absent.

本発明は、上記従来の問題点に鑑みてなされたもので、装置数を増やすことなく、汚水中の固形物を確実に除去することのできる固液分離装置を提供することを目的とする。   The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a solid-liquid separation apparatus that can reliably remove solid matter in sewage without increasing the number of apparatuses.

本願の請求項1に記載の発明は、汚水中の固形物を分離して除去する固液分離装置であって、汚水を貯留する貯留槽と、この貯留槽内に設置される、水中ポンプとその一端が上記水中ポンプの吸込み口に開口する空気導入管とを備えたエアレーションポンプと、
上記貯留槽の上部に設置される固液分離槽と、上記エアレーションポンプから送られてくる気泡を含んだ汚水を上記固液分離槽内に噴出させる汚水流入管と、上記固液分離槽内に設けられる、上記固液分離槽の液面に開口し、上記固液分離槽の液面に浮遊する水泡を回収する水泡回収管と、上記固液分離槽の液面近傍の汚水を回収する汚水回収管と、上記汚水回収管で回収された汚水を濾過するスクリーンを有し、上記スクリーンで濾過した汚水を上記貯留槽に戻す汚水戻し手段と、固液分離槽内の上記汚水流入管よりも上部側でかつ上記汚水回収管よりも下部側に設けられた処理水取出管とを備えたことを特徴とするものである。
請求項2に記載の発明は、請求項1に記載の固液分離装置において、上記固液分離槽底部の汚水及び水泡回収管で回収した汚水のいずれか一方または両方を、フィルタを備えた固形物分離器を介して、上記貯留槽へ戻すようにしたものである。
Invention of Claim 1 of this application is a solid-liquid separator which isolate | separates and removes the solid substance in wastewater, Comprising: The storage tank which stores wastewater, The submersible pump installed in this storage tank, An aeration pump provided with an air introduction pipe whose one end opens to the suction port of the submersible pump;
A solid-liquid separation tank installed at the upper part of the storage tank, a sewage inflow pipe for ejecting sewage containing bubbles sent from the aeration pump into the solid-liquid separation tank, and a solid-liquid separation tank A water bubble recovery pipe that opens to the liquid level of the solid-liquid separation tank and collects water bubbles floating on the liquid level of the solid-liquid separation tank; and sewage that collects sewage near the liquid level of the solid-liquid separation tank Than the recovery pipe, the screen for filtering the sewage collected by the sewage recovery pipe, the sewage return means for returning the sewage filtered by the screen to the storage tank, and the sewage inflow pipe in the solid-liquid separation tank A treated water discharge pipe is provided on the upper side and on the lower side of the sewage recovery pipe.
The invention according to claim 2 is the solid-liquid separator according to claim 1, wherein either one or both of the sewage collected at the bottom of the solid-liquid separation tank and the sewage recovery pipe is provided as a solid with a filter. It is made to return to the said storage tank through a material separator.

本発明によれば、汚水を貯留する貯留槽から、エアレーションポンプを用いて、多数の気泡を含んだ汚水を固液分離槽に送り、比重の重い固形物を上記固液分離槽の底部から排出し、固液分離槽の液面に浮遊する比重の軽い固形物が付着した水泡を上記固液分離槽内の液面に開口する水泡回収管で回収するとともに、固液分離槽の液面近傍に汚水回収管を設けて上記固液分離槽の上部の汚水を回収し、この汚水回収管で回収した汚水をスクリーンを通して、上記貯留槽に戻しながら、上記汚水流入管よりも上部側でかつ上記汚水回収管よりも下部側に設けられた処理水取出管により、上記微細な固形物についても十分に除去された汚水を取出すようにしたので、装置数を増やすことなく、汚水中の固形物を十分に除去することができる。
また、上記固液分離槽底部の汚水及び水泡回収管で回収した汚水のいずれか一方または両方を、フィルタを備えた固形物分離器を介して、上記貯留槽へ戻すようにすれば、廃棄する汚水量を減らすことができるので、汚水を効率的に固液分離することができる。
According to the present invention, from a storage tank for storing sewage, using an aeration pump, sewage containing a large number of bubbles is sent to a solid-liquid separation tank, and solid matter having a high specific gravity is discharged from the bottom of the solid-liquid separation tank. The water bubbles attached to the solid surface of the solid-liquid separation tank with light solid matter floating on the liquid surface are collected by the water bubble recovery pipe that opens to the liquid surface in the solid-liquid separation tank, and in the vicinity of the liquid surface of the solid-liquid separation tank The sewage recovery pipe is provided to collect the sewage at the upper part of the solid-liquid separation tank, and the sewage collected by the sewage recovery pipe is returned to the storage tank through the screen while being above the sewage inflow pipe and the above-mentioned Since the treated water take-off pipe provided below the sewage collection pipe is used to take out the sewage from which the fine solids have been sufficiently removed, the solids in the sewage can be removed without increasing the number of devices. It can be removed sufficiently.
In addition, if one or both of the sewage collected at the bottom of the solid-liquid separation tank and the sewage collected by the water bubble recovery pipe is returned to the storage tank via a solid substance separator equipped with a filter, the waste is discarded. Since the amount of sewage can be reduced, sewage can be efficiently separated into solid and liquid.

以下、本発明の最良の形態について、図面に基づき説明する。
図1及び図2は本発明の最良の形態に係る固液分離装置10の構成を示す図で、各図において、11は尿汚水などの汚水を貯留する貯留槽、12は上記貯留槽11の上部に設置された固液分離槽、13は上記貯留槽11内に設置された曝気放水ポンプ装置、14はこの曝気放水ポンプ装置13から吐出された気泡を含んだ汚水を上記固液分離槽12内へ噴出させる汚水流入管、15は上記固液分離槽12内に設置された水泡回収管、16は上記固液分離槽12の液面近傍に設けられた汚水回収管、17は上記汚水回収管16で回収した汚水を貯蔵するスクリーン沈殿槽、18は細目もしくは微細目のスクリーン本体18aを備えたスクリーン装置、19は不織布等から成るフィルタ19aを備えた固形物分離器である。上記汚水回収管16とスクリーン沈殿槽17とスクリーン装置18により、上記固液分離槽12内の汚水を貯留槽11に戻す汚水戻し手段を構成する。
なお、各図において、符号10aは上記貯留槽11内に処理汚水を供給する汚水供給管、10bは上記固液分離槽12内の固液分離された汚水を取出す処理水取出管である。
上記固液分離槽12は、上部側が円筒状であり、底部側が上部に開いた半円錐状となっている。この半円錐の上面から下側のテーパ部12aを有する領域が固形物沈殿領域12Aで上側の円筒部の領域が曝気領域12Bで、上記テーパ部12aの底部には固形物排出管12bが設けられている。
上記汚水流入管14は、上記2つの領域12A,12Bの境界近傍、すなわち、上記テーパ部12aの上面近傍に設けられている。また、槽内の固液分離された汚水を取出すための処理水取出管10bは上記汚水流入管14よりも上側でかつ上記汚水回収管16よりも下側に設けられている。
上記曝気放水ポンプ装置13は、図3にも示すように、モータ13Mと、このモータ13Mにより回転するスクリュー羽根13kと、上記スクリュー羽根13kの送り側に設けられた排出管13nとを備えた水中ポンプ13aと、上記モータ13Mを取付けるための取付部材13bと、一端が空気中に開口し、他端がモータ13Mの吸込み口に開口する吸気管13cとを備えたもので、上記吸気管13cからの空気を水中ポンプ13aの開口部の中心近傍に供給し、多数の気泡が混入された汚水を、上記汚水流入管14から固液分離槽12内に噴出させる。
水泡回収管15には、固液分離槽12の液面近傍に開口する開口部15aが設けられており、その底部には、上記開口部15aから当該回収管15内に流れ込んだ汚水を固形物分離器19に送るための移送管15bが設置されている。
また、汚水回収管16は上記固液分離槽12の液面近傍の汚水を上記スクリーン沈殿槽17に移送するもので、このスクリーン沈殿槽17から溢れた汚水はスクリーン装置18のスクリーン本体18aを通って貯留槽11に戻される。
Hereinafter, the best mode of the present invention will be described with reference to the drawings.
1 and 2 are diagrams showing the configuration of a solid-liquid separation device 10 according to the best mode of the present invention. In each figure, 11 is a storage tank for storing sewage such as urine sewage, and 12 is the storage tank 11. The solid-liquid separation tank installed in the upper part, 13 is an aeration / water discharge pump apparatus installed in the storage tank 11, and 14 is the solid-liquid separation tank 12 for removing sewage containing bubbles discharged from the aeration / water discharge pump apparatus 13. A sewage inflow pipe to be ejected into the inside, 15 is a water bubble collection pipe installed in the solid-liquid separation tank 12, 16 is a sewage collection pipe provided near the liquid surface of the solid-liquid separation tank 12, and 17 is the sewage collection pipe. A screen settling tank for storing the sewage collected by the pipe 16, 18 is a screen device having a fine or fine screen body 18a, and 19 is a solids separator having a filter 19a made of nonwoven fabric or the like. The sewage recovery pipe 16, the screen settling tank 17 and the screen device 18 constitute sewage return means for returning the sewage in the solid-liquid separation tank 12 to the storage tank 11.
In addition, in each figure, the code | symbol 10a is a sewage supply pipe | tube which supplies process wastewater in the said storage tank 11, 10b is a process water extraction pipe | tube which takes out the solid-liquid separated sewage in the said solid-liquid separation tank 12. FIG.
The solid-liquid separation tank 12 has a cylindrical shape on the upper side and a semiconical shape with the bottom side opened upward. The region having the tapered portion 12a on the lower side from the upper surface of the half cone is the solid precipitation region 12A, the region of the upper cylindrical portion is the aeration region 12B, and the solid discharge pipe 12b is provided at the bottom of the tapered portion 12a. ing.
The sewage inflow pipe 14 is provided in the vicinity of the boundary between the two regions 12A and 12B, that is, in the vicinity of the upper surface of the tapered portion 12a. Further, the treated water outlet pipe 10b for taking out the sewage separated into solid and liquid in the tank is provided above the sewage inflow pipe 14 and below the sewage recovery pipe 16.
As shown in FIG. 3, the aeration / water discharge pump device 13 includes a motor 13M, a screw blade 13k rotated by the motor 13M, and a discharge pipe 13n provided on the feed side of the screw blade 13k. A pump 13a, a mounting member 13b for mounting the motor 13M, and an intake pipe 13c having one end opened in the air and the other end opened in a suction port of the motor 13M. Is supplied to the vicinity of the center of the opening of the submersible pump 13a, and sewage mixed with a large number of bubbles is ejected from the sewage inflow pipe 14 into the solid-liquid separation tank 12.
The water bubble recovery pipe 15 is provided with an opening 15a that opens near the liquid surface of the solid-liquid separation tank 12, and at the bottom thereof, the sewage that has flowed into the recovery pipe 15 from the opening 15a is solid. A transfer pipe 15b for sending to the separator 19 is installed.
The sewage recovery pipe 16 transfers sewage near the liquid surface of the solid-liquid separation tank 12 to the screen settling tank 17, and the sewage overflowing from the screen settling tank 17 passes through the screen body 18a of the screen device 18. And returned to the storage tank 11.

次に、上記構成の固液分離装置10の作用について説明する。
まず、汚水供給管10aにより、固液分離処理をする汚水を貯留槽11内に入れる。そして、曝気放水ポンプ装置13のモータ13Mを駆動して水中ポンプ13aを稼動させ、貯留槽11内に貯留されている汚水を汚水流入管14に送り、固液分離槽12内に噴出させる。上記水中ポンプ13aのスクリュー羽根13kが回転すると、貯留槽11内の汚水が上記水中ポンプ13aの吸引側に引き込まれるので、上記水中ポンプ13aの吸込み口近傍には大きな負圧が発生する。したがって、上記水中ポンプ13aの吸込み口近傍に開口する吸気管13cから大気中の空気が上記吸込み口近傍に供給され、上記汚水に巻き込まれて混合される。これにより、曝気放水ポンプ装置13の排出管13nからは、多数の気泡が混合された汚水が排出され、これが、汚水流入管14を介して固液分離槽12内に噴出される。
上記固液分離槽12内の汚水中に含まれている比重の重い固形物は、上記固形物沈殿領域12Aにおいて、上記汚水流入管14から噴出される汚水により発生する旋回流により、上記固液分離槽12の底部に運ばれ、固形物排出管12bから固形物分離器19に送られる。固形物分離器19では、上記汚水中の比重の重い固形物をフィルタ19aで分離した後、上記汚水を、汚水排出管19bを介して、貯留槽11に戻す。
Next, the operation of the solid-liquid separation device 10 having the above configuration will be described.
First, sewage to be subjected to solid-liquid separation processing is put into the storage tank 11 by the sewage supply pipe 10a. Then, the motor 13M of the aeration / discharge pump device 13 is driven to operate the submersible pump 13a, and the sewage stored in the storage tank 11 is sent to the sewage inflow pipe 14 and ejected into the solid-liquid separation tank 12. When the screw blade 13k of the submersible pump 13a rotates, the sewage in the storage tank 11 is drawn into the suction side of the submersible pump 13a, so that a large negative pressure is generated near the suction port of the submersible pump 13a. Therefore, air in the atmosphere is supplied to the vicinity of the suction port from the suction pipe 13c that opens near the suction port of the submersible pump 13a, and is entrained and mixed in the sewage. Thereby, sewage mixed with a large number of bubbles is discharged from the discharge pipe 13 n of the aeration / discharge pump device 13, and is ejected into the solid-liquid separation tank 12 through the sewage inflow pipe 14.
The solid matter having a high specific gravity contained in the sewage in the solid-liquid separation tank 12 is caused by the swirl flow generated by the sewage ejected from the sewage inflow pipe 14 in the solid matter precipitation region 12A. It is conveyed to the bottom of the separation tank 12 and sent to the solid separator 19 from the solid discharge pipe 12b. In the solid substance separator 19, after separating the solid substance with heavy specific gravity in the waste water with the filter 19a, the waste water is returned to the storage tank 11 via the waste water discharge pipe 19b.

一方、曝気領域12Bでは、上記汚水流入管14から汚水とともに噴出された気泡により、繊維物質等の比重の軽い微細な固形物が上記固液分離槽12の上部へ運ばれるので、上記固液分離槽12の液面は、上記微細な固形物が付着した多数の水泡が浮遊した状態となる。これらの水泡は、水泡回収管15の開口部15aから管内に流入し、その底部に上記回収された微細な固形物を含む汚水が貯留される。
また、上記固液分離槽12の液面近傍の汚水は、汚水回収管16を通ってスクリーン沈殿槽17に送られる。このスクリーン沈殿槽17から溢れた汚水は、図4に示すように、スクリーン装置18のスクリーン本体18aを通って貯留槽11に戻される。一方、上記スクリーン本体18a上を落下する微細な固形物を含む汚水は、上記スクリーン本体18aの下部に設けられた案内板18bから上記固形物分離器19に流れ込み、汚水中の微細な固形物がフィルタ19aで分離された後、貯留槽11に戻される。上記スクリーン沈殿槽17に回収された汚水中の微細な固形物は、スクリーン本体18aもしくはフィルタ19aを通過することで取り除かれてから貯留槽11に戻されることになる。また、上記スクリーン沈殿槽17の底部の汚水は、上記固液分離槽12で取りきれなかった比重の大きな固形物が混入しているが、この固形物を含んだ汚水も、上記スクリーン沈殿槽17の底部に設けられた固形物排出管17bから固形物分離器19に送られ、上記汚水中の固形物が分離された後、上記汚水排出管19bから貯留槽11に戻される。
また、本例では、上記水泡回収管15の底部に連通する移送管15bを設けて、上記水泡回収管15の底部に集められた汚水を固形物分離器19に送り、フィルタ19aで上記汚水中の微細な固形物を分離した後、貯留槽11に戻すようにしている。
上記貯留槽11に戻された汚水は、曝気放水ポンプ装置13により、再び、上記固液分離槽12に送られ固液分離される。
本例では、このように、汚水中の比重の大きな固形物や微細な固形物をスクリーン装置18のスクリーン本体18aまたは固形物分離器19のフィルタ19aで除去しながら循環させているので、上記曝気領域12Bの下部側の汚水中には固形物が殆ど含まれていない。したがって、上記処理水取出管10bからは、固形物が十分に分離された汚水を取出すことができる。
On the other hand, in the aeration area 12B, fine solids having a low specific gravity such as fiber material are carried to the upper part of the solid-liquid separation tank 12 by the bubbles ejected from the sewage inflow pipe 14 together with the sewage. The liquid level of the tank 12 is in a state in which a large number of water bubbles with the fine solid matter attached thereto float. These water bubbles flow into the tube from the opening 15a of the water bubble recovery tube 15, and sewage containing the collected fine solid matter is stored at the bottom thereof.
The sewage near the liquid surface of the solid-liquid separation tank 12 is sent to the screen settling tank 17 through the sewage recovery pipe 16. The sewage overflowing from the screen sedimentation tank 17 is returned to the storage tank 11 through the screen body 18a of the screen device 18 as shown in FIG. On the other hand, the sewage containing fine solids falling on the screen body 18a flows into the solids separator 19 from the guide plate 18b provided at the lower part of the screen body 18a. After being separated by the filter 19a, it is returned to the storage tank 11. The fine solid matter in the sewage collected in the screen settling tank 17 is removed by passing through the screen body 18a or the filter 19a and then returned to the storage tank 11. The sewage at the bottom of the screen sedimentation tank 17 is mixed with a solid material having a large specific gravity that could not be removed by the solid-liquid separation tank 12. After the solid matter in the sewage is separated from the solid matter discharge pipe 17b provided at the bottom of the sewage and separated in the sewage, it is returned to the storage tank 11 from the sewage discharge pipe 19b.
Further, in this example, a transfer pipe 15b communicating with the bottom of the water bubble recovery pipe 15 is provided, and the sewage collected at the bottom of the water bubble recovery pipe 15 is sent to the solid matter separator 19, and the sewage is filtered by the filter 19a. These fine solids are separated and then returned to the storage tank 11.
The sewage returned to the storage tank 11 is again sent to the solid-liquid separation tank 12 by the aeration / discharge pump device 13 and separated into solid and liquid.
In this example, the solid matter having a large specific gravity or the fine solid matter in the sewage is circulated while being removed by the screen body 18a of the screen device 18 or the filter 19a of the solid matter separator 19 as described above. The sewage on the lower side of the region 12B contains almost no solid matter. Therefore, the sewage from which the solid matter is sufficiently separated can be taken out from the treated water outlet pipe 10b.

このように、本最良の形態によれば、尿汚水などの汚水を貯留する貯留槽11の上部に、下側の半円錐状の領域(固形物沈殿領域12A)と、上側の円筒状の領域(曝気領域12B)とを有する固液分離槽12を設置し、曝気放水ポンプ装置13にて、上記貯留槽11内の汚水に多数の気泡を混合させて固液分離槽12内に噴出させ、上記固形物沈殿領域12Aにおいて、比重の重い固形物は固液分離槽12の下部に集めて固形物分離器19に送り、上記固形物を取り除いた後上記貯留槽11に戻す。一方、曝気領域12Bにおいては、固液分離槽12の液面に浮遊する比重の軽い微細な固形物が付着された水泡を水泡回収管15で、液面近傍の汚水を汚水回収管16で回収した後、それぞれ、固形物分離器19及びスクリーン装置18にて、上記微細な固形物を除去して上記貯留槽11に戻す。そして、上記のように、汚水を循環させながら、上記曝気領域12Bの下部側に設けられた処理水取出管10bから上記固液分離槽12内の固形物が分離された汚水を取出すようにしたので、装置数を増やすことなく、汚水を十分に固液分離できる。   As described above, according to the best mode, the lower semi-conical region (solids precipitation region 12A) and the upper cylindrical region are provided on the upper portion of the storage tank 11 for storing sewage such as urine sewage. A solid-liquid separation tank 12 having (aeration area 12B) is installed, and in the aeration water discharge pump device 13, a large number of bubbles are mixed with the sewage in the storage tank 11 and ejected into the solid-liquid separation tank 12. In the solid matter precipitation region 12A, the solid matter having a high specific gravity is collected in the lower part of the solid-liquid separation tank 12 and sent to the solid matter separator 19 to remove the solid matter and return to the storage tank 11. On the other hand, in the aeration region 12B, the water bubbles to which the fine solid matter having a light specific gravity floating on the liquid surface of the solid-liquid separation tank 12 is attached are recovered by the water bubble recovery tube 15 and the sewage near the liquid surface is recovered by the waste water recovery tube 16. After that, the fine solid matter is removed and returned to the storage tank 11 by the solid matter separator 19 and the screen device 18, respectively. Then, as described above, while circulating the sewage, the sewage from which the solid matter in the solid-liquid separation tank 12 has been separated is taken out from the treated water outlet pipe 10b provided on the lower side of the aeration region 12B. Therefore, the sewage can be sufficiently solid-liquid separated without increasing the number of devices.

なお、上記固液分離槽12の下部に集められた汚水や水泡回収管15の底部に集められた汚水、あるいは、上記スクリーン沈殿槽17の底部の汚水については、従来と同様に汚物回収槽に排出して処理するようにしてもよいが、本例のように、固形物分離器19で固液分離した後、貯留槽11に戻すようにする方が、廃棄する汚水の量を減らすことができる。また、分離した固形物は全て固形物分離器19のフィルタ19aに集められるので、汚水を効率的に固液分離することができるとともに、処理設備を簡易化できる。
また、上記固形物分離器19に、上記フィルタ19aに加えて、パンチングプレートや六角ハニカムブロック等の他の固形物分離手段を設けるようにすれば、上記汚水から固形物を確実に分離することができる。
また、上記例では、固形物分離器19を固液分離槽12に隣接して設けたが、各設備の配置はこれに限るものではなく、固液分離槽12を固液分離槽12の下方で貯留槽11の上部に設置するなど、設備の設置場所に応じて適宜決定すればよい。
また、上記例では、固液分離処理をする汚水を汚水供給管10aから直接貯留槽11内に導入したが、スクリーンもしくはフィルタ等の固形物分離器を介して貯留槽11内に導入するようにしてもよい。
The sewage collected at the bottom of the solid-liquid separation tank 12 and the sewage collected at the bottom of the water bubble recovery pipe 15 or the sewage at the bottom of the screen settling tank 17 are disposed in the sewage collection tank as in the conventional case. Although it may be discharged and processed, it is possible to reduce the amount of waste water to be discarded by solid-liquid separation with the solid separator 19 and then returning to the storage tank 11 as in this example. it can. Moreover, since all the separated solid matter is collected on the filter 19a of the solid matter separator 19, the waste water can be efficiently separated into solid and liquid, and the processing equipment can be simplified.
In addition to the filter 19a, the solid matter separator 19 can be provided with other solid matter separating means such as a punching plate and a hexagonal honeycomb block, so that the solid matter can be reliably separated from the sewage. it can.
In the above example, the solid separator 19 is provided adjacent to the solid-liquid separation tank 12, but the arrangement of each facility is not limited to this, and the solid-liquid separation tank 12 is located below the solid-liquid separation tank 12. It may be determined as appropriate according to the installation location of the equipment, such as being installed at the top of the storage tank 11.
In the above example, the sewage to be subjected to the solid-liquid separation process is directly introduced into the storage tank 11 from the sewage supply pipe 10a. However, the sewage is introduced into the storage tank 11 through a solid separator such as a screen or a filter. May be.

本発明によれば、装置数を増やすことなく、汚水中の固形物を十分に分離することができるので、尿汚水中の固形物を分離除去する設備の他、養殖水槽の循環水に含まれる糞尿や残餌などを分離除去するための固液分離装置などに適用することにより、汚水の処理を効率よく行うことができる。   According to the present invention, since solids in sewage can be sufficiently separated without increasing the number of devices, in addition to equipment for separating and removing solids in urine sewage, it is included in the circulating water of the aquaculture tank. By applying it to a solid-liquid separation device or the like for separating and removing feces and urine, residual sewage can be efficiently treated.

本発明の最良の形態に係る固液分離装置の構成を示す断面図である。It is sectional drawing which shows the structure of the solid-liquid separator which concerns on the best form of this invention. 本発明の最良の形態に係る固液分離装置の構成を示す平面図である。It is a top view which shows the structure of the solid-liquid separator which concerns on the best form of this invention. 曝気放水ポンプ装置の構成を示す図である。It is a figure which shows the structure of an aeration water discharge pump apparatus. スクリーン及びスクリーン沈殿槽の側面図である。It is a side view of a screen and a screen settling tank. 従来の汚水処理方法を示す図である。It is a figure which shows the conventional sewage treatment method. 従来の固液分離装置の一構成例を示す図である。It is a figure which shows one structural example of the conventional solid-liquid separator.

符号の説明Explanation of symbols

10 固液分離装置、10a 汚水供給管、10b 処理水取出管、11 貯留槽、
12 固液分離槽、12A 固形物沈殿領域、12B 曝気領域、12a テーパ部、
12b 固形物排出管、13 曝気放水ポンプ装置、13a 水中ポンプ、
13b 取付部材、13c 吸気管、13M モータ、13k スクリュー羽根、
13n 排出管、14 汚水流入管、15 水泡回収管、15a 開口部、
15b 移送管、16 汚水回収管、17 スクリーン沈殿槽、
17b 固形物排出管、18 スクリーン、18a スクリーン本体、18b 案内板、19 固形物分離器、19a フィルタ、19b 汚水排出管。
10 solid-liquid separator, 10a sewage supply pipe, 10b treated water take-out pipe, 11 storage tank,
12 solid-liquid separation tank, 12A solid matter precipitation area, 12B aeration area, 12a taper part,
12b Solid matter discharge pipe, 13 Aeration / water discharge pump device, 13a Submersible pump,
13b mounting member, 13c intake pipe, 13M motor, 13k screw blade,
13n discharge pipe, 14 sewage inflow pipe, 15 water bubble recovery pipe, 15a opening,
15b transfer pipe, 16 sewage recovery pipe, 17 screen sedimentation tank,
17b Solid matter discharge pipe, 18 screen, 18a Screen body, 18b Guide plate, 19 Solid matter separator, 19a Filter, 19b Sewage discharge pipe.

Claims (2)

汚水を貯留する貯留槽と、この貯留槽内に設置される、水中ポンプとその一端が上記水中ポンプの吸込み口に開口する空気導入管とを備えたエアレーションポンプと、
上記貯留槽の上部に設置される固液分離槽と、上記エアレーションポンプから送られてくる気泡を含んだ汚水を上記固液分離槽内に噴出させる汚水流入管と、上記固液分離槽内に設けられる、上記固液分離槽の液面に開口し、上記固液分離槽の液面に浮遊する水泡を回収する水泡回収管と、上記固液分離槽の液面近傍の汚水を回収する汚水回収管と、上記汚水回収管で回収された汚水を濾過するスクリーンを有し、上記スクリーンで濾過した汚水を上記貯留槽に戻す汚水戻し手段と、固液分離槽内の上記汚水流入管よりも上部側でかつ上記汚水回収管よりも下部側に設けられた処理水取出管とを備えたことを特徴とする固液分離装置。
An aeration pump provided with a storage tank for storing sewage, an underwater pump installed in the storage tank, and an air introduction pipe whose one end opens to the suction port of the submersible pump;
A solid-liquid separation tank installed at the upper part of the storage tank, a sewage inflow pipe for ejecting sewage containing bubbles sent from the aeration pump into the solid-liquid separation tank, and a solid-liquid separation tank A water bubble recovery pipe that opens to the liquid level of the solid-liquid separation tank and collects water bubbles floating on the liquid level of the solid-liquid separation tank; and sewage that collects sewage near the liquid level of the solid-liquid separation tank Than the recovery pipe, the screen for filtering the sewage collected by the sewage recovery pipe, the sewage return means for returning the sewage filtered by the screen to the storage tank, and the sewage inflow pipe in the solid-liquid separation tank A solid-liquid separation device comprising: a treated water extraction pipe provided on an upper side and a lower side of the sewage recovery pipe.
上記固液分離槽底部の汚水及び水泡回収管で回収した汚水のいずれか一方または両方を、フィルタを備えた固形物分離器を介して、上記貯留槽へ戻すようにしたことを特徴とする請求項1に記載の固液分離装置。   Either or both of the sewage collected at the bottom of the solid-liquid separation tank and the sewage collected by the water bubble recovery pipe are returned to the storage tank via a solid separator equipped with a filter. Item 2. The solid-liquid separator according to Item 1.
JP2007030290A 2007-02-09 2007-02-09 Solid-liquid separator Expired - Fee Related JP5094151B2 (en)

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CN115385519B (en) * 2022-07-25 2023-06-13 威海智洁环保技术有限公司 Rural domestic sewage treatment system and application method thereof
CN115490343A (en) * 2022-11-21 2022-12-20 枣庄市金地源环保设备有限公司 Aeration equipment for sewage treatment

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