JP2016203086A - Carrier-charging type sewage treatment apparatus - Google Patents

Carrier-charging type sewage treatment apparatus Download PDF

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JP2016203086A
JP2016203086A JP2015086869A JP2015086869A JP2016203086A JP 2016203086 A JP2016203086 A JP 2016203086A JP 2015086869 A JP2015086869 A JP 2015086869A JP 2015086869 A JP2015086869 A JP 2015086869A JP 2016203086 A JP2016203086 A JP 2016203086A
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biological reaction
reaction tank
carrier
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JP6394980B2 (en
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智典 岩瀬
Tomonori Iwase
智典 岩瀬
圭 馬場
Kei Baba
圭 馬場
順 青木
Jun Aoki
順 青木
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JFE Engineering Corp
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    • 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
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Abstract

PROBLEM TO BE SOLVED: To provide a carrier-charging type sewage treatment apparatus in which a carrier separation apparatus is not blocked by a carrier.SOLUTION: The carrier-charging type sewage treatment apparatus is provided in which: a biological reaction tank 1 is divided longitudinally by a partition wall into a first biological reaction tank 1A and a second biological reaction tank 1B that have different capacities; at the downstream sides of the biological reaction tanks, carrier separation apparatuses 5A, 5B are provided respectively and overflow weirs 6A, 6B are provided respectively; a first inflow water way duct 10A is provided in such a way that the upstream side end part is opened at a swage tank 7 and the downstream side end part is opened at the upstream side of the first biological reaction tank 1A; a second inflow water way duct 10B is provided in such a way that the upstream side end part is opened at the swage tank 7 and the downstream side end part is opened at the upstream side of the second biological reaction tank 1B; a first outflow water way duct 11 is provided in such a way that the upstream side end part is opened at a first treatment water chamber 12A and the downstream side end part is opened at a second treatment water chamber 12B; and the length ratio between the overflow weir 6A of the first biological reaction tank 1A and the overflow weir 6B of the second biological reaction tank 1B almost equals to the capacity ratio between the first biological reaction tank 1A and the second biological reaction tank 1B.SELECTED DRAWING: Figure 1

Description

本発明は、微生物を付着させた担体によって汚水を処理する担体投入型汚水処理装置に関する。   The present invention relates to a carrier input type sewage treatment apparatus for treating sewage with a carrier to which microorganisms are attached.

従来の活性汚泥処理法を適用した汚水処理装置として、微生物を付着させた担体を生物反応槽内に投入して汚水処理を行う担体投入型汚水処理装置は知られている（例えば、特許文献１参照）。   As a sewage treatment apparatus to which a conventional activated sludge treatment method is applied, a carrier input type sewage treatment apparatus that performs sewage treatment by introducing a carrier with microorganisms attached into a biological reaction tank is known (for example, Patent Document 1). reference).

また、特許文献２には、雨天時等に設計値以上の水量が処理場に流入した場合に、担体と生物反応槽混合液を分離する担体分離板の閉塞を回避することができるようにした担体投入型生物反応装置が記載されている。
特許文献２に記載の装置を図６に示す。この装置は、微生物を付着させた担体Ｓを用いて流入水の生物処理を行う生物反応槽３１と、この生物反応槽３１内に配設され、生物反応槽３１内の混合液から前記担体Ｓを捕捉分離する担体分離装置（担体分離板）３２と、生物反応槽３１の流下方向に沿って設置され、流入水を移送する移送管３３とを備えている。この移送管３３には、上流側から流入口３５、流入調整具３６、下流側流入口３４が設けられている。 Further, in Patent Document 2, when the amount of water more than the design value flows into the treatment plant during rainy weather or the like, it is possible to avoid clogging of the carrier separation plate that separates the carrier and the biological reaction tank mixture. A carrier input bioreactor is described.
The device described in Patent Document 2 is shown in FIG. This apparatus includes a biological reaction tank 31 that performs biological treatment of influent water using a carrier S to which microorganisms are attached, and a biological reaction tank 31 that is disposed in the biological reaction tank 31. Is provided along a flow-down direction of the biological reaction tank 31 and a transfer pipe 33 that transfers inflow water. The transfer pipe 33 is provided with an inlet 35, an inflow adjuster 36, and a downstream inlet 34 from the upstream side.

この装置においては、通常時は流入水が移送管３３上流側の流入口３５から生物反応槽３１内に流入する。また、過剰流入水が流入したときは、その過剰流入水が流入調整具３６のゲートを超えて下流側流入口３４から担体分離装置３２の下流側に分配流入される。このため、担体分離板３２に生物反応槽３１の流入水量（設計水量）以上の水量負荷がかからず、担体Ｓが担体分離板３２付近の上流側に集中するようなことがなく、担体Ｓによる担体分離板３２の閉塞を回避することができる。   In this apparatus, inflow water normally flows into the biological reaction tank 31 from the inlet 35 upstream of the transfer pipe 33. Further, when excessive inflow water flows in, the excessive inflow water passes through the gate of the inflow adjuster 36 and is distributed and introduced from the downstream inflow port 34 to the downstream side of the carrier separation device 32. For this reason, the carrier separation plate 32 is not loaded with a water amount greater than the amount of inflow water (designed water amount) of the biological reaction tank 31, and the carrier S is not concentrated upstream in the vicinity of the carrier separation plate 32. The blockage of the carrier separation plate 32 due to the above can be avoided.

しかしながら、図６に示した装置では、生物反応槽３１の末端に担体分離板を設置しているため、槽内断面流速が大きくなると、担体が担体分離装置側に偏り、槽内断面流速がある一定の値に達すると担体分離装置が閉塞する恐れがある。   However, in the apparatus shown in FIG. 6, since the carrier separation plate is installed at the end of the biological reaction tank 31, when the cross-sectional flow velocity in the tank increases, the carrier is biased toward the carrier separation apparatus and there is a cross-sectional flow speed in the tank. When a certain value is reached, the carrier separation device may be blocked.

特開昭５８−６７３９５号公報JP 58-67395 A 特開２０１０−１５５１８４号公報JP 2010-155184 A

本発明は生物反応槽内において担体が担体分離装置側に偏って担体分離装置が閉塞することのない担体投入型汚水処理装置を提供することを目的とする。   An object of the present invention is to provide a carrier input type sewage treatment apparatus in which a carrier is not biased toward the carrier separation device and the carrier separation device is not blocked in the biological reaction tank.

担体が投入された生物反応槽においては、担体分離装置近傍の担体濃度が高濃度になると担体が担体分離装置に圧着されて、水の通過が阻害され処理効率が低下する。この担体濃度は生物反応槽の幅：長さ比と断面流速によって決まる。
そこで、本発明者は、幅：長さ比及び断面流速について検討した結果、生物反応層を仕切壁によって容積の異なる二つの生物反応槽に分割し、各生物反応槽に担体分離装置を設け、流入水を分割して各生物反応槽に供給するようにし、各生物反応槽に処理水が越流できる越流堰を設け、生物反応槽の容積に応じて処理水の越流量が異なるようにすることにより上記課題を解決することができることを見いだして本発明を完成した。
すなわち、本発明の構成は以下に記載する通りの担体投入型汚水処理装置に係るものである。 In the biological reaction tank in which the carrier is charged, when the carrier concentration in the vicinity of the carrier separation device becomes high, the carrier is pressed against the carrier separation device, the water passage is inhibited, and the processing efficiency is lowered. This carrier concentration is determined by the width: length ratio and cross-sectional flow rate of the bioreactor.
Therefore, as a result of examining the width: length ratio and the cross-sectional flow velocity, the present inventor divided the biological reaction layer into two biological reaction tanks having different volumes by a partition wall, and provided a carrier separation device in each biological reaction tank, Divide the influent water into each biological reaction tank, and install an overflow weir in each biological reaction tank to allow the treated water to overflow, so that the flow rate of the treated water varies depending on the volume of the biological reaction tank. The present invention was completed by finding that the above-mentioned problems can be solved by doing so.
That is, the configuration of the present invention relates to a carrier input sewage treatment apparatus as described below.

（１）担体を用いて生物処理を行う生物反応槽と、前記生物反応槽に汚水を供給する汚水槽とを備えた担体投入型汚水処理装置であって、
前記生物反応槽は、仕切壁によって長さ方向に容積の異なる第１生物反応槽と第２生物反応槽とに分割されており、
前記第１生物反応槽には、下流側に第1担体分離装置と第１越流壁とが設けられ、
第１流入水路ダクトが、その上流側の端部が前記汚水槽に開口し、下流側の端部が前記第１生物反応槽の上流側に開口するように前記汚水槽と第１生物反応槽との間の槽壁を貫通して設けられ、
前記第２生物反応槽には、下流側に第２担体分離装置と第２越流壁とが設けられ、
第２流入水路ダクトが、その上流側の端部が前記汚水槽に開口し、下流側の端部が前記第２生物反応槽の上流側に開口するように前記汚水槽と第１生物反応槽との間の槽壁及び前記仕切壁を貫通して設けられ、
第１流出水路ダクトが、その上流側の端部が前記第１越流壁の下流側の第１処理水室に開口し、下流側の端部が前記第２越流壁の下流側の第２処理水室に開口するように前記仕切壁及び前記第２越流壁を貫通して設けられ、
前記第１越流壁の上端部の第１越流堰と前記第２越流壁の上端部の第２越流堰の長さの比が、前記第１生物反応槽と前記第２生物反応槽の容積の比に略等しいことを特徴とする担体投入型汚水処理装置。
（２）前記第１担体分離装置と前記第１越流堰との間及び前記第２担体分離装置と前記第２越流堰との間の少なくとも一方にバッフル板が立設されていることを特徴とする上記（１）に記載の担体投入型汚水処理装置。 (1) A carrier input type sewage treatment apparatus comprising a biological reaction tank that performs biological treatment using a carrier, and a sewage tank that supplies sewage to the biological reaction tank,
The biological reaction tank is divided into a first biological reaction tank and a second biological reaction tank having different volumes in the length direction by a partition wall;
The first biological reaction tank is provided with a first carrier separation device and a first overflow wall on the downstream side,
The sewage tank and the first biological reaction tank are arranged such that an upstream end of the first inflow duct opens to the sewage tank and a downstream end opens to the upstream side of the first biological reaction tank. Through the tank wall between
The second biological reaction tank is provided with a second carrier separation device and a second overflow wall on the downstream side,
The second inflow water duct has an upstream end opened to the sewage tank and a downstream end opened to the upstream side of the second biological reaction tank. Between the tank wall and the partition wall,
The first outflow channel duct has an upstream end opened to the first treated water chamber downstream of the first overflow wall, and a downstream end thereof downstream of the second overflow wall. 2 provided through the partition wall and the second overflow wall so as to open to the treated water chamber,
The ratio of the length of the first overflow weir at the upper end of the first overflow wall and the length of the second overflow weir at the upper end of the second overflow wall is the first biological reaction tank and the second biological reaction. A carrier-filled sewage treatment apparatus characterized by being approximately equal to the ratio of the tank volumes.
(2) A baffle plate is erected between at least one of the first carrier separation device and the first overflow weir and between the second carrier separation device and the second overflow weir. The carrier input type sewage treatment apparatus as described in (1) above, which is characterized by the following.

本発明の担体投入型汚水処理装置は、生物反応槽内において担体が担体分離装置側に偏って担体分離装置が閉塞することがないため、安定した生物処理を行うことができる。   In the carrier input type sewage treatment apparatus of the present invention, the carrier is not biased toward the carrier separation device in the biological reaction tank and the carrier separation device is not clogged, so that stable biological treatment can be performed.

本発明の実施の形態による担体投入型汚水処理装置を模式的に示す断面図である。It is sectional drawing which shows typically the support | carrier insertion type sewage treatment apparatus by embodiment of this invention. 本発明の実施の形態による担体投入型汚水処理装置を示す概略的な斜視図である。1 is a schematic perspective view showing a carrier input sewage treatment apparatus according to an embodiment of the present invention. 本発明の他の実施の形態による担体投入型汚水処理装置を模式的に示す断面図である。It is sectional drawing which shows typically the carrier injection | throwing-in type sewage treatment apparatus by other embodiment of this invention. 図３に示した担体投入型汚水処理装置の部分拡大図である。It is the elements on larger scale of the carrier injection | throwing-in type sewage treatment apparatus shown in FIG. 本発明の他の実施の形態による担体投入型汚水処理装置を模式的に示す部分斜視図である。It is a fragmentary perspective view which shows typically the carrier injection | pouring type sewage treatment apparatus by other embodiment of this invention. 従来の担体投入型汚水処理装置を示す図である。It is a figure which shows the conventional support | carrier insertion type sewage treatment apparatus.

以下に本発明を実施の形態を示すことにより詳細に説明するが、本発明の技術的範囲は下記実施の形態に何ら限定されるものではない。
本発明の担体投入型汚水処理装置の実施形態の一つを図１及び図２に基づいて以下で説明する。 The present invention will be described in detail below with reference to embodiments, but the technical scope of the present invention is not limited to the following embodiments.
One embodiment of the carrier input type sewage treatment apparatus of the present invention will be described below with reference to FIGS. 1 and 2.

担体投入型汚水処理装置２０は基本的な構成として、担体Ｓを用いて生物処理を行う生物反応槽１と生物反応槽１に汚水を供給する汚水槽７とを備えている。
生物反応槽１は仕切壁３によって長さ方向にそれぞれ容積の異なる第１生物反応槽１Ａと第２生物反応槽１Ｂとに分割されている。また汚水槽７と第１生物反応槽１Ａとは生物反応槽１Ａの上流側槽壁２によって仕切られている。本実施形態では第１生物反応槽１Ａの容積が第２生物反応槽１Ｂの容積よりも大きくなるようにしている。容積比は例えば６：４程度とすることが好ましい。
そして、汚水槽７、第１生物反応槽１Ａ及び第２生物反応槽１Ｂのそれぞれには槽内を好気的状態に保持するための散気装置８ａ、８ｂ、８ｃが設けられている。 The carrier input sewage treatment apparatus 20 includes, as a basic configuration, a biological reaction tank 1 that performs biological treatment using the carrier S and a sewage tank 7 that supplies sewage to the biological reaction tank 1.
The biological reaction tank 1 is divided by a partition wall 3 into a first biological reaction tank 1A and a second biological reaction tank 1B having different volumes in the length direction. Further, the sewage tank 7 and the first biological reaction tank 1A are partitioned by the upstream tank wall 2 of the biological reaction tank 1A. In this embodiment, the volume of the 1st biological reaction tank 1A is made larger than the volume of the 2nd biological reaction tank 1B. The volume ratio is preferably about 6: 4, for example.
Each of the sewage tank 7, the first biological reaction tank 1A, and the second biological reaction tank 1B is provided with air diffusers 8a, 8b, and 8c for maintaining the inside of the tank in an aerobic state.

第１生物反応槽１Ａの処理水の流れ方向の下流側には第１担体分離装置５Ａと該装置用散気配管１６Ａが設けられている。そして、第１担体分離装置５Ａと仕切壁３との間には第１越流壁９Ａが設けられており、第１越流壁９Ａの上端部は第１越流堰６Ａを形成している。
第１越流堰６Ａを越えた処理水は第１越流壁９Ａと仕切壁３との間に形成されている第１処理水室１２Ａに流入する。 A first carrier separation device 5A and a diffusion pipe 16A for the device are provided on the downstream side of the first biological reaction tank 1A in the flow direction of the treated water. A first overflow wall 9A is provided between the first carrier separation device 5A and the partition wall 3, and an upper end portion of the first overflow wall 9A forms a first overflow weir 6A. .
The treated water beyond the first overflow weir 6A flows into the first treated water chamber 12A formed between the first overflow wall 9A and the partition wall 3.

第２生物反応槽１Ｂの処理水の流れ方向の下流側には第２担体分離装置５Ｂと該装置用散気配管１６Ｂが設けられている。そして、第２担体分離装置５Ｂと第２生物反応槽１Ｂの下流側槽壁４との間には第２越流壁９Ｂが設けられ、第２越流壁９Ｂの上端部は第２越流堰６Ｂを形成している。
第２越流堰６Ｂを越えた処理水は第２越流壁９Ｂと第２生物反応槽１Ｂの下流側槽壁４との間に形成されている第２処理水室１２Ｂに流入する。 A second carrier separation device 5B and a diffuser pipe 16B for the device are provided on the downstream side of the second biological reaction tank 1B in the flow direction of the treated water. A second overflow wall 9B is provided between the second carrier separation device 5B and the downstream tank wall 4 of the second biological reaction tank 1B. The upper end of the second overflow wall 9B is the second overflow wall. A weir 6B is formed.
The treated water exceeding the second overflow weir 6B flows into the second treated water chamber 12B formed between the second overflow wall 9B and the downstream tank wall 4 of the second biological reaction tank 1B.

第１越流堰６Ａと第２越流堰６Ｂとは高さは同じであるが、それぞれの越流堰の長さが異なっており、これにより単位時間当たりの越流量が異なる。
本実施形態では第１生物反応槽１Ａの容積をＶＡとし、第２生物反応槽１Ｂの容積をＶＢとし、第１越流堰６Ａの長さをＬＡとし、第２越流堰６Ｂの長さをＬＢとしたとき、下記式（１）の関係が成り立つようにする。
ＶＡ／ＶＢ＝ＬＡ／ＬＢ ・・・（１）
上記のように越流堰の長さの比を第１生物反応槽の容積ＶＡと第２生物反応槽の容積ＶＢの比に等しくなるように設定することにより第１越流堰６Ａの越流水量が第２越流堰６Ｂの越流水量よりも多くなる。
なお、前記のＶＡ／ＶＢの比の値とＬＡ／ＬＢの比の値とは厳密に一致する必要はなく、多少のずれがあってもよい。 The first overflow weir 6A and the second overflow weir 6B have the same height, but the lengths of the respective overflow weirs are different, and thus the overflow rate per unit time is different.
In this embodiment the volume of V A of the first bioreactor 1A, the volume of the second biological reactor 1B and V B, the length of the first weir 6A and L A, second weir 6B of length when the L B, so that satisfied the relationship of the following formula (1).
V A / V B = L A / L B (1)
As described above, the ratio of the length of the overflow weir is set to be equal to the ratio of the volume V A of the first biological reaction tank and the volume V B of the second biological reaction tank. The overflow water amount is larger than the overflow water amount of the second overflow weir 6B.
The value of the ratio of V A / V B and the value of the ratio of L A / L B do not need to be exactly the same, and there may be some deviation.

汚水槽７と第１生物反応槽１Ａとの間の槽壁２には、第１生物反応槽１Ａに第１汚水ＷＡを供給するための第１流入水路ダクト１０Ａが貫通して設けられている。第１流入水路ダクト１０Ａの上流側端部は前記汚水槽７に開口して第１流入堰１３Ａを形成しており、また、第１流入水路ダクト１０Ａの下流側端部は前記第１生物反応槽１Ａの上流側に開口しており、第１生物反応槽１Ａに第１汚水ＷＡを供給する。   The tank wall 2 between the sewage tank 7 and the first biological reaction tank 1A is provided with a first inflow water duct 10A for supplying the first sewage WA to the first biological reaction tank 1A. . The upstream end of the first inflow conduit 10A opens into the sewage tank 7 to form a first inflow weir 13A, and the downstream end of the first inflow conduit 10A is the first biological reaction. The first sewage WA is supplied to the first biological reaction tank 1A.

汚水槽７と第１生物反応槽１Ａとの間の槽壁２及び仕切壁３には第２生物反応槽１Ｂに第２汚水ＷＢを供給するための第２流入水路ダクト１０Ｂが貫通して設けられている。第２流入水路ダクト１０Ｂの上流側端部は前記汚水槽７に開口して第２流入堰１３Ｂを形成しており、また、第２流入水路ダクト１０Ｂの下流側端部は前記第２生物反応槽１Ｂの上流側に開口しており、第２生物反応槽１Ｂに第２汚水ＷＢを供給する。   The tank wall 2 and the partition wall 3 between the sewage tank 7 and the first biological reaction tank 1A are provided with a second inflow water duct 10B for supplying the second sewage WB to the second biological reaction tank 1B. It has been. The upstream end of the second inflow conduit 10B opens into the sewage tank 7 to form a second inflow weir 13B, and the downstream end of the second inflow conduit 10B is the second biological reaction. It opens to the upstream side of the tank 1B and supplies the second sewage WB to the second biological reaction tank 1B.

仕切壁３及び、第２越流壁９Ｂには流出水路ダクト１１が貫通して設けられている。
流出水路ダクト１１の上流側端部は第１処理水室１２Ａに開口しており、流出水路ダクト１１の下流側端部は第２処理水室１２Ｂに開口している。第１処理水室１２Ａに流入した処理水は流出水路ダクト１１を通って第２処理水室１２Ｂに供給される。 An outflow channel duct 11 is provided through the partition wall 3 and the second overflow wall 9B.
The upstream end of the outflow water duct 11 opens to the first treated water chamber 12A, and the downstream end of the outflow water duct 11 opens to the second treated water chamber 12B. The treated water flowing into the first treated water chamber 12A is supplied to the second treated water chamber 12B through the outflow water duct 11.

第１流入水路ダクト１０Ａの第１流入堰１３Ａの開口面積ＳＡは第２流入水路ダクト１０Ｂの流入堰の開口面積ＳＢよりも大きく形成されている。これにより、第１汚水ＷＡの第１生物反応槽１Ａへの流入量が第２汚水ＷＢの第２生物反応槽１Ｂへの流入量よりも多くなる。 The opening area S A of the first inflow weir 13A of the first inlet water passage duct 10A is formed larger than the opening area S B of the inflow gate of the second inlet water passage duct 10B. Thereby, the inflow amount of the first sewage WA into the first biological reaction tank 1A becomes larger than the inflow amount of the second sewage WB into the second biological reaction tank 1B.

図１及び図２に基づいて、汚水処理フローについて説明する。
汚水槽７に流入した汚水Ｗは、散気装置８ａで曝気処理される。第１流入水路ダクト１０Ａの第１流入堰１３Ａから流入した第１汚水ＷＡは第１流入水路ダクト１０Ａを通って第１生物反応槽１Ａ内に供給される。また、第２流入水路ダクト１０Ｂの第２流入堰１３Ｂから流入した第２汚水ＷＢは第２流入水路ダクト１０Ｂを通って第２生物反応槽１Ｂに供給される。 Based on FIG.1 and FIG.2, a sewage treatment flow is demonstrated.
The sewage W flowing into the sewage tank 7 is aerated by the air diffuser 8a. The first sewage WA flowing in from the first inflow weir 13A of the first inflow channel duct 10A is supplied into the first biological reaction tank 1A through the first inflow channel duct 10A. Moreover, the 2nd waste water WB which flowed in from the 2nd inflow weir 13B of the 2nd inflow channel duct 10B is supplied to the 2nd biological reaction tank 1B through the 2nd inflow channel duct 10B.

第１生物反応槽１Ａ内に流入した第１汚水ＷＡは、散気装置８ｂで曝気処理を受けながら担体Ｓによって生物反応処理される。処理水は第１担体分離装置５Ａで担体Ｓを分離されたのち、第１越流堰６Ａを越流して第１処理水室１２Ａ内に流入する。第１処理水室１２Ａ内の処理水は流出水路ダクト１１を通って第２処理水室１２Ｂ内に流入する。   The first sewage WA that has flowed into the first biological reaction tank 1A is subjected to a biological reaction process by the carrier S while being subjected to an aeration process by the aeration device 8b. The treated water is separated from the carrier S by the first carrier separating device 5A, and then flows through the first overflow weir 6A and flows into the first treated water chamber 12A. The treated water in the first treated water chamber 12A flows into the second treated water chamber 12B through the outflow water duct 11.

一方、第２生物反応槽１Ｂ内に流入した第２汚水ＷＢは、散気装置８ｃで曝気処理を受けながら担体Ｓによって生物反応処理される。処理水は第２担体分離装置５Ｂで担体Ｓを分離されたのち、第２越流堰６Ｂを越流して第２処理水室１２Ｂ内に流入する。
第２処理水室１２Ｂ内に流入した第１生物反応槽１Ａからの処理水及び第２生物反応槽１Ｂからの処理水は合流して流出堰１４から流出し担体投入型汚水処理装置２０から排出される。 On the other hand, the second sewage WB that has flowed into the second biological reaction tank 1B is subjected to a biological reaction process by the carrier S while being subjected to an aeration process by the air diffuser 8c. The treated water is separated from the carrier S by the second carrier separation device 5B, and then overflows the second overflow weir 6B and flows into the second treated water chamber 12B.
The treated water from the first biological reaction tank 1A and the treated water from the second biological reaction tank 1B that have flowed into the second treated water chamber 12B are merged to flow out from the outflow weir 14 and are discharged from the carrier charging sewage treatment apparatus 20. Is done.

他の実施形態を図３に示す。
第１越流堰６Ａ及び第２越流堰６Ｂ付近は処理水の流速が大きくなるため、この付近の第１担体分離装置５Ａ及び第２担体分離装置５Ｂを通過する処理水の流速が大きくなり局所流が発生する。局所流が発生すると、担体が担体分離装置に圧着して全体の処理効率が低下する。 Another embodiment is shown in FIG.
In the vicinity of the first overflow weir 6A and the second overflow weir 6B, the flow rate of the treated water increases, so the flow rate of the treated water passing through the first carrier separation device 5A and the second carrier separation device 5B in the vicinity thereof increases. Local flow occurs. When the local flow is generated, the carrier is pressure-bonded to the carrier separation device, and the overall processing efficiency is lowered.

図３に示した実施形態においては、第１担体分離装置５Ａと第１越流堰６Ａとの間にバッフル板１５Ａを設け、第２担体分離装置５Ｂと第２越流堰６Ｂ壁との間にバッフル板１５Ｂを設けている。このようにバッフル板１５Ａ、１５Ｂを設けることにより局所流を低減することができ、担体分離スクリーンの閉塞がなく、安定的に運転ができ、担体剥離のための散気空気量も低減することができる。
図３に示した例では、バッフル板１５Ａ、１５Ｂを設けているが、バッフル板はいずれか一つを設けるようにしても良い。図４にバッフル板１５Ａを設けたときの処理水の流れの状態を示す。 In the embodiment shown in FIG. 3, a baffle plate 15A is provided between the first carrier separating device 5A and the first overflow weir 6A, and between the second carrier separating device 5B and the second overflow weir 6B wall. Is provided with a baffle plate 15B. By providing the baffle plates 15A and 15B in this manner, the local flow can be reduced, the carrier separation screen is not blocked, the operation can be stably performed, and the amount of air diffused for carrier separation can be reduced. it can.
In the example shown in FIG. 3, the baffle plates 15A and 15B are provided, but any one of the baffle plates may be provided. FIG. 4 shows the state of the treated water flow when the baffle plate 15A is provided.

図５に他の実施形態を示す。
図２に示した装置では、第１流入水路ダクト１０Ａと第２流入水路ダクト１０Ｂとを汚水槽７の幅方向に並べて配置した例を示したが、図５に示した装置はその変形例である。
図５に示した装置においては第１流入水路ダクト１０Ａの第１流入堰１３Ａと第２流入水路ダクト１０Ｂの第２流入堰１３Ｂとが汚水槽の長さ方向に並べて配置されている。 FIG. 5 shows another embodiment.
In the apparatus shown in FIG. 2, the first inflow water duct 10 </ b> A and the second inflow water duct 10 </ b> B are arranged side by side in the width direction of the sewage tank 7, but the apparatus shown in FIG. 5 is a modification thereof. is there.
In the apparatus shown in FIG. 5, the first inflow weir 13A of the first inflow channel duct 10A and the second inflow weir 13B of the second inflow channel duct 10B are arranged side by side in the length direction of the sewage tank.

１ 生物反応槽
１Ａ 第１生物反応槽
１Ｂ 第２生物反応槽
２ 上流側槽壁
３ 仕切壁
４ 下流側槽壁
５Ａ 第１担体分離装置
５Ｂ 第２担体分離装置
６Ａ 第１越流堰
６Ｂ 第２越流堰
７ 汚水槽
８ａ、８ｂ、８ｃ 散気装置
９Ａ 第１越流壁
９Ｂ 第２越流壁
１０Ａ 第１流入水路ダクト
１０Ｂ 第２流入水路ダクト
１１ 流出水路ダクト
１２Ａ 第１処理水室
１２Ｂ 第２処理水室
１３Ａ 第１流入堰
１３Ｂ 第２流入堰
１４ 流出堰
１５Ａ バッフル板
１５Ｂ バッフル板
１６Ａ 第１担体分離装置用散気配管
１６Ｂ 第２担体分離装置用散気配管
２０ 担体投入型汚水処理装置
３１ 生物反応槽
３２ 担体分離板
３３ 移送管
３４ 下流側流入口
３５ 流入口
３６ 流入調整具
Ｓ 担体
Ｗ 汚水
ＷＡ 第１汚水
ＷＢ 第２汚水 1 biological reaction tank 1A first biological reaction tank 1B second biological reaction tank 2 upstream tank wall 3 partition wall 4 downstream tank wall 5A first carrier separator 5B second carrier separator 6A first overflow weir 6B second Overflow weir 7 Sewage tanks 8a, 8b, 8c Air diffuser 9A First overflow wall 9B Second overflow wall 10A First inflow channel duct 10B Second inflow channel duct 11 Outflow channel duct 12A First treated water chamber 12B First 2 treated water chamber 13A first inflow weir 13B second inflow weir 14 outflow weir 15A baffle plate 15B baffle plate 16A aeration pipe 16B for first carrier separation device aeration pipe 20 for second carrier separation device 20 31 Bioreaction tank 32 Carrier separation plate 33 Transfer pipe 34 Downstream inlet 35 Inlet 36 Inflow regulator S Carrier W Sewage WA First sewage WB Second sewage

Claims (2)

担体を用いて生物処理を行う生物反応槽と、前記生物反応槽に汚水を供給する汚水槽とを備えた担体投入型汚水処理装置であって、
前記生物反応槽は、仕切壁によって長さ方向に容積の異なる第１生物反応槽と第２生物反応槽とに分割されており、
前記第１生物反応槽には、下流側に第1担体分離装置と第１越流壁とが設けられ、
第１流入水路ダクトが、その上流側の端部が前記汚水槽に開口し、下流側の端部が前記第１生物反応槽の上流側に開口するように前記汚水槽と第１生物反応槽との間の槽壁を貫通して設けられ、
前記第２生物反応槽には、下流側に第２担体分離装置と第２越流壁とが設けられ、
第２流入水路ダクトが、その上流側の端部が前記汚水槽に開口し、下流側の端部が前記第２生物反応槽の上流側に開口するように前記汚水槽と第１生物反応槽との間の槽壁及び前記仕切壁を貫通して設けられ、
第１流出水路ダクトが、その上流側の端部が前記第１越流壁の下流側の第１処理水室に開口し、下流側の端部が前記第２越流壁の下流側の第２処理水室に開口するように前記仕切壁及び前記第２越流壁を貫通して設けられ、
前記第１越流壁の上端部の第１越流堰と前記第２越流壁の上端部の第２越流堰の長さの比が、前記第１生物反応槽と前記第２生物反応槽の容積の比に略等しいことを特徴とする担体投入型汚水処理装置。 A carrier input type sewage treatment apparatus comprising a biological reaction tank that performs biological treatment using a carrier, and a sewage tank that supplies sewage to the biological reaction tank,
The biological reaction tank is divided into a first biological reaction tank and a second biological reaction tank having different volumes in the length direction by a partition wall;
The first biological reaction tank is provided with a first carrier separation device and a first overflow wall on the downstream side,
The sewage tank and the first biological reaction tank are arranged such that an upstream end of the first inflow duct opens to the sewage tank and a downstream end opens to the upstream side of the first biological reaction tank. Through the tank wall between
The second biological reaction tank is provided with a second carrier separation device and a second overflow wall on the downstream side,
The second inflow water duct has an upstream end opened to the sewage tank and a downstream end opened to the upstream side of the second biological reaction tank. Between the tank wall and the partition wall,
The first outflow channel duct has an upstream end opened to the first treated water chamber downstream of the first overflow wall, and a downstream end thereof downstream of the second overflow wall. 2 provided through the partition wall and the second overflow wall so as to open to the treated water chamber,
The ratio of the length of the first overflow weir at the upper end of the first overflow wall and the length of the second overflow weir at the upper end of the second overflow wall is the first biological reaction tank and the second biological reaction. A carrier-filled sewage treatment apparatus characterized by being approximately equal to the ratio of the tank volumes. 前記第１担体分離装置と前記第１越流堰との間及び前記第２担体分離装置と前記第２越流堰との間の少なくとも一方にバッフル板が立設されていることを特徴とする請求項１に記載の担体投入型汚水処理装置。 A baffle plate is erected between at least one of the first carrier separator and the first overflow weir and between the second carrier separator and the second overflow weir. The carrier input type sewage treatment apparatus according to claim 1.
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