JP2006000834A

JP2006000834A - Apparatus for treating drainage

Info

Publication number: JP2006000834A
Application number: JP2004205290A
Authority: JP
Inventors: Katsumi Nagao; 克己長尾
Original assignee: NAGAO KANKYO SETSUBI KK
Current assignee: NAGAO KANKYO SETSUBI KK
Priority date: 2004-06-14
Filing date: 2004-06-14
Publication date: 2006-01-05

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for treating drainage which eliminates a flow rate regulation tank, and is compact and cheap. <P>SOLUTION: The apparatus has a capacity of a membrane filtration activated sludge tank which is the sum of a required capacity of biological treatment and that of flow rate regulation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は膜分離活性汚泥型の排水処理装置に関する。 The present invention relates to a membrane separation activated sludge type waste water treatment apparatus.

有機物を主体とした排水の排水処理装置として膜分離装置を用いた膜分離活性汚泥方式のものが公知である。従来、この方式は排水の日変動を平均化して均一な処理をするために膜分離活性汚泥槽の前に流量調整槽を設けて、一旦排水を流量調整槽に貯留し、この排水を計量装置で計量して膜分離活性汚泥槽に送るようにしている。 A membrane separation activated sludge system using a membrane separation device is known as a wastewater treatment device for wastewater mainly composed of organic matter. Conventionally, this method has provided a flow control tank in front of the membrane separation activated sludge tank in order to average the daily fluctuation of the waste water and perform uniform treatment, and temporarily store the waste water in the flow control tank, And we are sending it to the membrane separation activated sludge tank.

Problems to be solved by the present invention

ところが従来のものは、膜分離活性汚泥槽とは別に流量調整槽と計量装置を設けていたので、これら流量調整槽と計量装置を設けるだけ設備費やスペースが余分にかかるのみならず、調整槽攪拌ブロワや計量ポンプの動力費が余分にかかる問題があった。
本発明は流量調整槽を省きコンパクトで安価な排水処理装置を提供することである。However, the conventional one has a flow rate adjustment tank and a metering device separately from the membrane separation activated sludge tank. There was a problem that the power consumption of the stirring blower and the metering pump was excessive.
The present invention is to provide a compact and inexpensive waste water treatment apparatus by omitting a flow rate adjusting tank.

Means for solving the problem

そこで本発明は、従来から吸引型の膜分離活性汚泥型の排水処理装置においては、吸引ポンプの吸引量を調節する吸引量調節装置を設け、定量的に処理水を吸引していることに着目し、膜分離装置を備えた膜分離活性汚泥槽と膜分離装置から処理水を吸引する吸引ポンプと吸引ポンプの吸引量を調節する吸引量調節装置と膜分離装置にエアーを供給するブロワとを備える排水処理装置において、膜分離活性汚泥槽の容量を生物処理必要容量と流量調整の容量とを加算した容量としたのである。Accordingly, the present invention focuses on the fact that a suction-type membrane separation activated sludge-type wastewater treatment device conventionally has a suction amount adjusting device for adjusting the suction amount of a suction pump, and sucks treated water quantitatively. A membrane separation activated sludge tank equipped with a membrane separation device, a suction pump for sucking treated water from the membrane separation device, a suction amount adjusting device for adjusting the suction amount of the suction pump, and a blower for supplying air to the membrane separation device In the wastewater treatment apparatus provided, the capacity of the membrane separation activated sludge tank is the sum of the necessary biological treatment capacity and the capacity for flow rate adjustment.

The invention's effect

本発明は流量調整槽を設けることなく、膜分離活性汚泥槽の容量を生物処理必要容量と流量調整の容量とを加算した容量としたから、流量調整槽を介さずに膜分離活性汚泥槽に流入した排水は生物処理されて、吸引ポンプの動作により吸引量調節装置で設定した吸引量づつ膜分離装置から吸引され排水されるとともに、排水処理装置への排水の流入量と吸引ポンプの吸引量との差の排水は膜分離活性汚泥槽に貯留できるのである。このように本発明は流量調整槽を膜分離活性汚泥槽と別に設けないから、それだけコンパクトに、かつ安価にできるのである。また、計量ポンプや流量調整槽を攪拌するためのブロワが必要なくなるのでこの点からも安価にでき、かつ消費動力が少なくなる分維持費も安くできるのである。 In the present invention, since the capacity of the membrane separation activated sludge tank is a capacity obtained by adding the capacity required for biological treatment and the capacity of the flow adjustment without providing the flow adjustment tank, the membrane separation activated sludge tank can be used without the flow adjustment tank. The inflow wastewater is biologically processed and sucked and drained from the membrane separation device by the suction amount set by the suction amount adjustment device by the operation of the suction pump, and the inflow amount of wastewater to the wastewater treatment device and the suction amount of the suction pump The waste water of the difference between the two can be stored in the membrane separation activated sludge tank. As described above, the present invention does not provide the flow rate adjusting tank separately from the membrane separation activated sludge tank, so that it can be made compact and inexpensive. Further, since a blower for agitating the metering pump and the flow rate adjusting tank is not necessary, the cost can be reduced from this point, and the maintenance cost can be reduced because the power consumption is reduced.

図１に示すものは本発明の実施例にかかる排水処理装置で小規模なうどん店の排水を処理するためのものである。この排水処理装置はスクリーン設備（１）、膜分離活性汚泥槽（２）、消毒槽（３）からなっている。スクリーン設備（１）には自動微細目スクリーン（１１）が設置され、排水はまずスクリーン設備（１）に流入し、排水中の１ｍｍ以上の固形物を除去した後、膜分離活性汚泥槽（２）に流入する。膜分離活性汚泥槽（２）には膜分離装置（２１）を設置している。
また、膜分離装置（２１）にエアーを供給するブロワ（２２）、膜分離装置（２１）から処理水を吸引し、消毒槽（３）に移送する吸引ポンプ（２３）とこの吸引ポンプ（２３）の配管（２４）に設け、定流量弁からなる吸引量を調節する吸飲量調節装置（２５）を設けている。膜分離活性汚泥槽（２）の容量はＢＯＤ容積負荷、ＭＬＳＳ−ＢＯＤ負荷などを基準にして求める生物処理に必要な容量（生物処理容量部（２Ａ））に流量調整に必要な容量（流量調整容量部（２Ｂ））とを加算した容量としている。流量調整に必要な容量は排水時間中の平均排水量と膜分離装置（２１）から吸引する吸引量との差に排水時間をかけた容量としている。
また、膜分離活性汚泥槽（２）の排水流入部分にはバッフル（２６）を設けて流入部（２Ｃ）を形成しており、流入した排水はこの流入部（２Ｃ）で活性汚泥と充分に接触して有機物を活性汚泥に吸着させるようにしている。（２７）は流入部（２Ｃ）をエアー攪拌するためのばっ気装置である。
また、吸引ポンプやブロワの運転はレベルスイッチ（２８）による自動運転としており、生物処理に必要な容量と膜分離装置（２１）の保護を考慮した吸引ポンプ停止水位（ＬＷＬ）、その上部に吸引ポンプ起動水位（ＨＷＬ）を設定している。この起動水位（ＨＷＬ）と停止水位（ＬＷＬ）との設定幅は小さい方が良いが機器の動作の安定性や保護を考慮して定める。
消毒槽（３）には滅菌器（３１）を設けている。
かくして、排水はスクリーン設備（１）を介して膜分離活性汚泥槽（２）の流入部（２Ｃ）に流入し、排水は活性汚泥と充分混合され、その混合された排水が活性汚泥が流入部（２Ｃ）から膜分離装置（２１）側に移流するのである。膜分離活性汚泥槽（２）に流入した排水は、この槽（２）に流量調整の容量を持たせているから吸引ポンプ（２３）で，吸引量調節装置（２５）で設定した量づつ一定の処理ができ、しかも吸引量と排水の流入量との差分はこの槽（２）に貯留できるのである。かくして、本発明実施例は流量調整槽を殊更に設けることがないので、それだけコンパクトにかつ安価にすることができるのであり、しかも計量ポンプや流量調整槽攪拌用のブロワを必要としないからそれだけ設備を安価にでき、しかも維持用の電力費も安くすることができるのである。FIG. 1 shows a wastewater treatment apparatus according to an embodiment of the present invention for treating wastewater from a small udon store. This waste water treatment apparatus comprises a screen facility (1), a membrane separation activated sludge tank (2), and a disinfection tank (3). The screen equipment (1) is equipped with an automatic fine screen (11). The wastewater first flows into the screen equipment (1), and after removing solids of 1 mm or more in the wastewater, the membrane separation activated sludge tank (2 ). A membrane separation device (21) is installed in the membrane separation activated sludge tank (2).
Also, a blower (22) for supplying air to the membrane separation device (21), a suction pump (23) for sucking treated water from the membrane separation device (21) and transferring it to the disinfection tank (3), and this suction pump (23 ) And a drinking amount adjusting device (25) for adjusting the amount of suction composed of a constant flow valve. The capacity of the membrane separation activated sludge tank (2) is the volume necessary for the biological treatment (biological treatment capacity section (2A)) required for the biological treatment obtained based on the BOD volume load, MLSS-BOD load, etc. The capacity is the sum of the capacity part (2B)). The capacity required for the flow rate adjustment is a capacity obtained by multiplying the difference between the average drainage amount during the drainage time and the suction amount sucked from the membrane separation device (21) by the drainage time.
In addition, a baffle (26) is provided in the drainage inflow part of the membrane separation activated sludge tank (2) to form an inflow part (2C). The inflowing wastewater is sufficiently separated from the activated sludge in this inflow part (2C). The organic matter is adsorbed to the activated sludge by contact. (27) is an aeration apparatus for air agitating the inflow portion (2C).
The suction pump and blower are operated automatically by the level switch (28), and the suction pump stop water level (LWL) taking into account the capacity required for biological treatment and the protection of the membrane separator (21), and the suction above it The pump start water level (HWL) is set. The set width between the start water level (HWL) and the stop water level (LWL) is preferably small, but is determined in consideration of the stability and protection of the operation of the device.
The sterilizer (3) is provided with a sterilizer (31).
Thus, the wastewater flows into the inflow part (2C) of the membrane separation activated sludge tank (2) through the screen equipment (1), and the wastewater is sufficiently mixed with the activated sludge, and the mixed wastewater flows into the inflow part of the activated sludge. It is transferred from (2C) to the membrane separator (21) side. The waste water flowing into the membrane separation activated sludge tank (2) is constant by the amount set by the suction amount adjusting device (25) by the suction pump (23) because the tank (2) has a capacity for adjusting the flow rate. In addition, the difference between the suction amount and the inflow amount of drainage can be stored in this tank (2). Thus, since the embodiment of the present invention does not have any further flow rate adjusting tank, it can be made more compact and less expensive, and it does not require a metering pump or a blower for stirring the flow rate adjusting tank. The power cost for maintenance can be reduced.

は本発明にかかわる実施例で装置の模式断面図である。These are the schematic cross sections of an apparatus in the Example concerning this invention.

Explanation of symbols

（１）・・・スクリーン設備
（２）・・・膜分離活性汚泥槽
（３）・・・消毒槽
（２１）・・・膜分離装置
（２２）・・・ブロワ
（２３）・・・吸引ポンプ
（２５）・・・吸引量調節装置(1) ... Screen equipment (2) ... Membrane separation activated sludge tank (3) ... Disinfection tank (21) ... Membrane separation device (22) ... Blower (23) ... Suction Pump (25) ... Suction amount adjusting device

Claims

Drainage provided with a membrane separation activated sludge tank equipped with a membrane separation device, a suction pump for sucking treated water from the membrane separation device, a suction amount adjusting device for adjusting the suction amount of the suction pump, and a blower for supplying air to the membrane separation device In the treatment apparatus, a wastewater treatment apparatus in which the capacity of the membrane-separated activated sludge tank is a capacity obtained by adding the capacity for biological treatment and the capacity for flow rate adjustment.