JPH0461902A - Intermittent sedimentation basin - Google Patents
Intermittent sedimentation basinInfo
- Publication number
- JPH0461902A JPH0461902A JP2168243A JP16824390A JPH0461902A JP H0461902 A JPH0461902 A JP H0461902A JP 2168243 A JP2168243 A JP 2168243A JP 16824390 A JP16824390 A JP 16824390A JP H0461902 A JPH0461902 A JP H0461902A
- Authority
- JP
- Japan
- Prior art keywords
- treated water
- container
- tank
- sedimentation tank
- sedimentation
- 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.)
- Granted
Links
- 238000004062 sedimentation Methods 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000010802 sludge Substances 0.000 claims abstract description 33
- 238000012546 transfer Methods 0.000 claims abstract description 19
- 230000003247 decreasing effect Effects 0.000 claims abstract description 3
- 238000005273 aeration Methods 0.000 claims description 54
- 239000010865 sewage Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 37
- 239000002351 wastewater Substances 0.000 description 13
- 239000006228 supernatant Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
Abstract
Description
本発明は、汚水浄化槽に関し、特に汚水浄化槽の沈殿池
構造に関する。TECHNICAL FIELD The present invention relates to a sewage septic tank, and particularly to a sedimentation basin structure of a sewage septic tank.
汚水処理装置は大別して、回分式汚水処理装置と連続式
汚水処理装置とに分けられる。
回分式汚水処理装置は、例えば、流量調整槽と反応槽と
からなり、流入工程、曝気工程、沈殿工程、排出工程を
１サイクルとして繰り返すようになっている。
第２ａ図〜第２ｄ図は、このような回分式汚水処理装置
の流入工程、曝気工程、沈殿工程、排出工程をそれぞれ
示す。
流入工程（第２ａ図）で、汚水が流量調整槽３０に流入
管３４から流入し、汚水移送ポンプ３６により汚水が反
応槽３２に送られる。曝気工程（第２ｂ図）で、汚水は
反応槽３２にお０て、散気装置３８から出る空気により
活性汚泥と共Ｇこ曝気混合され、汚濁成分を除去される
。次に、反応槽３２は沈殿工程（第２Ｃ図）となり、上
澄水と：ａ縮縮性性汚泥に分けられる。最後に、排出工
程（第２ｄ図）で、上澄水排出装置４０ａ！こより処理
水が排出管４０ｂから排出される。
回分式汚水処理装置には以下の問題点がある。
■沈殿工程、排出工程においては、曝気を停止しなくて
はならず、曝気工程中にそれ６二見合う分の酸素を供給
しなくてはならないため、送風機が大きなものとなる。
■曝気槽か単一であるため、運転方法が限られる。
■曝気槽の水位変動が大きいため最適な曝気水深を得ら
れに＜＜、また、生物膜法の適用も難かしい。
連続式汚水処理装置は、第３図に示すように、流量調整
槽４２、計量装置４４、曝気槽４６、沈殿槽４８とから
なり、汚水が流入管５０から流量調整槽４２に入り、処
理水か沈殿槽４８を流出管５２から出るようになってい
る。
汚水は、汚水移送ポンプ５４により、流量調整槽４２か
ら計量装置４４に送られた後、曝気槽４６に入る。ＥＩ
気槽４６では、汚水は散気装置５６から出る空気により
活性汚泥と共に曝気混合され、汚濁成分を除去される。
曝気処理された汚水は沈殿槽４８に入り、沈殿処理を受
け、上澄水と：ｌ／Ａｌ１１！活性汚泥とに分けられ、
上澄水は処理水として処理水排出管５２から流出し、濃
縮活性汚泥は濃縮活性汚泥移送装置５８により曝気槽４
６に戻されるようになっている。
連続式汚水処理装置には以下の間ｕ点がある。
■計量装置において汚水の移送量の調整が難しく、また
、不安定である。
■計量装置に移送される汚水の大部分は流量調整槽に戻
されるため、動力費が無駄である。
■沈殿池内の被処理水は常に動いているため、偏流、乱
流が生じやすく分離効率がよくない。
■特に中小規模の円型沈殿池または多角形（但し三角形
を除く）型沈殿池においては、底部を６０°以上の勾配
をもったホッパー構造としなくてはならないため、有効
容量を大きくとれない。Sewage treatment equipment can be broadly divided into batch type sewage treatment equipment and continuous type sewage treatment equipment. A batch-type sewage treatment device includes, for example, a flow rate adjustment tank and a reaction tank, and repeats an inflow process, an aeration process, a precipitation process, and a discharge process as one cycle. Figures 2a to 2d show the inflow process, aeration process, precipitation process, and discharge process of such a batch type sewage treatment apparatus, respectively. In the inflow step (FIG. 2a), sewage flows into the flow rate adjustment tank 30 from the inflow pipe 34, and is sent to the reaction tank 32 by the sewage transfer pump 36. In the aeration step (FIG. 2b), the sewage is aerated and mixed with activated sludge in the reaction tank 32 by the air discharged from the aeration device 38 to remove pollutant components. Next, the reaction tank 32 undergoes a sedimentation process (FIG. 2C), where it is separated into supernatant water and shrinkable sludge. Finally, in the discharge process (Fig. 2d), the supernatant water discharge device 40a! The treated water is thereby discharged from the discharge pipe 40b. Batch-type sewage treatment equipment has the following problems. ■During the precipitation process and discharge process, aeration must be stopped, and oxygen must be supplied during the aeration process to compensate for that amount, which requires a large blower. ■Since there is only one aeration tank, operation methods are limited. ■Due to large fluctuations in the water level of the aeration tank, it is difficult to obtain the optimum aeration water depth, and it is also difficult to apply the biofilm method. As shown in FIG. 3, the continuous sewage treatment equipment consists of a flow rate adjustment tank 42, a metering device 44, an aeration tank 46, and a settling tank 48. Sewage enters the flow rate adjustment tank 42 from an inflow pipe 50, and the treated water is The sedimentation tank 48 is configured to exit through an outflow pipe 52. The wastewater is sent from the flow rate adjustment tank 42 to the metering device 44 by the wastewater transfer pump 54, and then enters the aeration tank 46. E.I.
In the air tank 46, the sewage is aerated and mixed with activated sludge by the air coming out from the air diffuser 56, and pollutant components are removed. The aerated wastewater enters the sedimentation tank 48, undergoes sedimentation treatment, and is combined with supernatant water: l/Al11! It is divided into activated sludge and
The supernatant water flows out from the treated water discharge pipe 52 as treated water, and the concentrated activated sludge is transferred to the aeration tank 4 by the concentrated activated sludge transfer device 58.
It is now set back to 6. Continuous sewage treatment equipment has the following points. ■It is difficult and unstable to adjust the amount of wastewater transferred using the metering device. ■Since most of the wastewater transferred to the metering device is returned to the flow rate adjustment tank, power costs are wasted. ■Since the water to be treated in the sedimentation tank is constantly moving, it tends to cause uneven flow and turbulence, and separation efficiency is poor. ■Particularly in small to medium-sized circular or polygonal (excluding triangular) type sedimentation tanks, the effective capacity cannot be increased because the bottom must have a hopper structure with a slope of 60° or more.
流量調整槽を持つ連続式汚水処理法における問題点の１
つに、流量調整槽より曝気槽へ汚水を移送する際に、汚
水を計量しなくてはならない点がある。
通常は、流入汚水量に変動があるので汚水計量が不可欠
となるが、さらに汚水計量を必要とする要因の一つとし
て曝気槽との関係がある。
曝気槽は、種々な方法で運転されるので、曝気槽に連結
される沈殿槽は曝気槽の運転に対応できるものでなけれ
ばならない、従って、汚水の計量を行う意味は、曝気槽
に適正な負荷を掛けること、沈殿池で適正な固液分離を
行うことにもあるといえる。
汚水の計量は、一般には以下の方法で行なわれる。すな
わち、流量調整槽内の汚水移送ポンプはポンプの閉塞を
未然に防止するため、比較的大容量のポンプを選定しな
くてはならない、しかし、短時間に大流量の汚水を移送
すると、沈殿池において乱れが生じ、処理効率が低下す
る。そのため、計量装置を用いて、大流量の汚水の一部
分を曝気槽へ移送し、その他の汚水は流量調整槽へもど
さなくてはならない、これは動力費の無駄である。
また、汚水の計量は一般に堰を用いて行われるが、調整
が難しく、移送量も不安定である。
従って、本発明の目的は、汚水処理装置を改良するなめ
に、間欠式に運転でき、かつ安定した沈殿処理を行える
沈殿池を提供することである。
また、本発明の目的は、従来の浄化槽の付帯設備を簡略
化すると共に、処理性能の向上を図ることである。Problem 1 in continuous sewage treatment method with flow rate adjustment tank
One of the problems is that the wastewater must be measured when it is transferred from the flow rate adjustment tank to the aeration tank. Normally, sewage measurement is essential because the amount of inflowing sewage fluctuates, but one of the factors that requires sewage measurement is the relationship with the aeration tank. Since the aeration tank is operated in various ways, the sedimentation tank connected to the aeration tank must be compatible with the operation of the aeration tank.Therefore, the meaning of measuring wastewater is to determine the appropriate method for the aeration tank. It can also be said that it involves applying a load and performing appropriate solid-liquid separation in the settling tank. Measurement of wastewater is generally carried out in the following manner. In other words, in order to prevent the pump from clogging, a pump with a relatively large capacity must be selected for the sewage transfer pump in the flow rate adjustment tank. However, if a large flow of sewage is transferred in a short period of time, Disturbances occur in the process, reducing processing efficiency. Therefore, it is necessary to use a metering device to transfer a portion of the large flow of sewage to the aeration tank, while the other sewage must be returned to the flow rate adjustment tank, which is a waste of power costs. Additionally, wastewater is generally measured using a weir, but it is difficult to adjust and the amount transferred is unstable. Therefore, an object of the present invention is to provide a sedimentation tank that can be operated intermittently and that can perform stable sedimentation treatment in order to improve sewage treatment equipment. Another object of the present invention is to simplify the ancillary equipment of conventional septic tanks and to improve treatment performance.
上記目的を達成するために、本発明の沈殿池においては
、被処理液を収容して処理し、処理水と濃縮活性汚泥を
得る為の気密構造の沈殿池容器と、該沈殿池容器の底部
に接続された移流装置と、前記沈殿池容器の処理水の水
面下に接続された遮断可能な処理水排出管と、前記沈殿
池容器に処理水の水面より上で接続された給気装置と、
前記沈殿池容器に処理水の水面より上で接続された遮断
可能な排気装置とからなり、給気装置からの給気および
給気遮断と、排気装置による排気および排気遮断と、処
理水排出装置の開放および遮断とにより、沈殿池容器内
の処理水の上部における空間の空気量を増減して、処理
水の排出と濃縮活性汚泥の移送を行うようにしである。
本発明の沈殿池を採用した汚水処理装置では、沈殿池容
器を複数、並列に曝気槽の後に設置し、各沈殿池容器の
移流装置をそれぞれ曝気層に＃続すると共に、個々の移
流装置にバルブを配置することにより、各沈殿池容器の
沈殿時間をすらすことかできるようにし、沈殿池容器と
給気装置を小型にすることかできる。また、沈殿槽の後
段に設置される消毒槽も小さくて済む。
本発明の沈殿池容器は、連続式汚水処理装置の沈殿池を
改良したものであるが、本発明の沈殿池の内部に曝気装
置を設け、曝気槽を兼ねることにすれば、回分式汚水処
理装置としても利用できる。In order to achieve the above object, the sedimentation tank of the present invention includes a sedimentation tank container having an airtight structure for storing and treating a liquid to be treated to obtain treated water and concentrated activated sludge, and a bottom portion of the sedimentation tank container. an advection device connected to the sedimentation tank, a shuttable treated water discharge pipe connected below the water surface of the treated water in the sedimentation tank container, and an air supply device connected to the sedimentation tank container above the water surface of the treated water. ,
It consists of an exhaust device that can be shut off and is connected to the sedimentation tank above the water surface of the treated water, and is configured to supply air and shut off the supply air from the air supply device, exhaust and shut off the exhaust air by the exhaust device, and a treated water discharge device. By opening and shutting off, the amount of air in the space above the treated water in the settling tank container is increased or decreased, and the treated water is discharged and the concentrated activated sludge is transferred. In the sewage treatment equipment employing the settling tank of the present invention, a plurality of settling tank containers are installed in parallel after the aeration tank, and the advection device of each settling tank container is connected to the aeration layer, and each advection device is connected to the aeration tank. By arranging the valves, it is possible to shorten the settling time of each sedimentation tank container, and it is possible to downsize the sedimentation tank container and the air supply device. Furthermore, the disinfection tank installed after the settling tank can also be small. The sedimentation tank container of the present invention is an improvement on the sedimentation tank of a continuous type sewage treatment device, but if an aeration device is installed inside the sedimentation tank of the present invention and it also serves as an aeration tank, it can be used for batch type sewage treatment. It can also be used as a device.
本発明の沈殿池容器は、給気装置、排気装置および処理
水排出管の運転若しくは開放と、停止もしくは遮断とに
より、沈殿池容器内水位を上下させて、沈殿池容器内へ
の汚水の導入、処理水の排出、さらに濃縮汚泥の容器外
移送を行う。そして、これらの導入、排出、移送の間に
、通常の沈殿池と同様にして汚水の沈殿処理を行う。
具体的には、給気装置を停止若しくは遮断し、排気装置
を解放し、処理水排出装置を遮断したとき、活性汚泥混
合液が沈殿池容器内に導入され、沈殿池容器内の水位が
上昇する。
そして、活性汚泥混合液の沈殿池容器内への導入を停止
し、給気装置と排気装置を共に停止若しくは遮断し、処
理水排出装置も遮断したとき、沈殿処理が行われ、活性
汚泥混合液が上澄水と濃縮活性汚泥とに分離される。
次に、活性汚泥混合液の沈殿池容器内への導入を停止し
たまま、給気装置を運転若しくは通気し、排気装置を停
止若しくは遮断して、処理水排出装置を解放すると、上
澄水が沈殿池容器から流出し、沈殿池容器内の水位か下
降する。
さらに、給気装置を運転若しくは通気し、排気装置を遮
断すると共に、処理水排出装置を遮断すると、濃縮活性
汚泥か沈殿池容器から排出される。
従って、上記のように構成された沈殿池容器の前に流量
調整装置及び曝気槽を配置し、沈殿池容器の移流装置を
曝気槽に接続して汚水処理装置を構成すると、流入汚水
量の変動を流量調整装置で吸収して処理量を一定に保ち
つつ、移流装置で接続された曝気槽および沈殿池容器に
おける安定した汚水処理か可能となる。
この汚水処理装置の全体の処理工程は、汚水を流量調整
槽を介して曝気槽に導入し、曝気槽から活性汚泥混合液
を沈殿槽に導入する流入工程、沈殿槽内で上澄水と濃縮
活性汚泥に分離する沈殿工程、沈殿槽から上澄水を排出
する排出工程、沈殿槽から濃縮活性汚泥を曝気槽へ返送
する汚泥移送工程の繰り返しからなり、これらの工程は
時間的に制御される。The sedimentation tank container of the present invention raises and lowers the water level in the sedimentation tank container by operating or opening, stopping or blocking the air supply device, exhaust device, and treated water discharge pipe, and introduces sewage into the sedimentation tank container. , discharge the treated water, and transfer the thickened sludge out of the container. During the introduction, discharge, and transfer, the wastewater is subjected to sedimentation treatment in the same manner as in a normal sedimentation tank. Specifically, when the air supply device is stopped or shut off, the exhaust device is released, and the treated water discharge device is shut off, the activated sludge mixture is introduced into the sedimentation tank container, and the water level inside the sedimentation tank rises. do. Then, when the introduction of the activated sludge mixture into the sedimentation tank container is stopped, the air supply device and the exhaust device are both stopped or shut off, and the treated water discharge device is also shut off, the sedimentation process is performed and the activated sludge mixture is is separated into supernatant water and concentrated activated sludge. Next, while stopping the introduction of the activated sludge mixture into the sedimentation tank container, the air supply device is operated or vented, the exhaust device is stopped or shut off, and the treated water discharge device is released, and the supernatant water is precipitated. The water flows out from the pond container, and the water level in the sedimentation tank container decreases. Further, when the air supply device is operated or vented, the exhaust device is shut off, and the treated water discharge device is shut off, the concentrated activated sludge is discharged from the settling tank container. Therefore, if a flow rate adjustment device and an aeration tank are arranged in front of the sedimentation tank container configured as described above, and the advection device of the sedimentation tank container is connected to the aeration tank to configure a sewage treatment device, the amount of inflowing sewage will fluctuate. This makes it possible to maintain stable wastewater treatment in the aeration tank and sedimentation tank connected by the advection device, while absorbing the wastewater with the flow rate adjustment device and keeping the amount of treatment constant. The overall treatment process of this sewage treatment equipment consists of introducing sewage into an aeration tank via a flow rate adjustment tank, an inflow process in which activated sludge mixture is introduced from the aeration tank into a settling tank, and a concentrated activated sludge mixture in the settling tank. It consists of repeating the sedimentation process of separating into sludge, the discharge process of discharging supernatant water from the sedimentation tank, and the sludge transfer process of returning concentrated activated sludge from the sedimentation tank to the aeration tank, and these processes are controlled in terms of time.
実施例について第１ａ図〜第１ｄ図を参照して説明する
と、本実施例の沈殿池容器を使用する汚水処理装置は、
流量調整ｓｉｏと、曝気槽１２と、沈殿池容器１４とか
らなり、汚水が流入管１６から流量調整槽１０に入り、
移送ポンプ１８により、曝気槽１２に送られるようにな
っている。
曝気槽１２の上部が沈殿池容器１４の底部に移流装置す
なわち移流管２０で連通している。
沈殿池容器１４の上部には、沈殿池容器１４内の気体の
排出・遮断を行う排気装置２２と、沈殿池容器１４内へ
気体の供給・遮断を行う給気装置２４が接続されている
。さらに、沈殿池容器１４には、上澄水を排出する排出
管２６が接続されている。排出管２６は、その先端２６
ａが沈殿池容器１４内の所定の高さＬＷＬに位置決めさ
れ、また排出装［２８により排出・遮断か制御されるよ
うになっている。排出管２６と排出装置２８が処理水排
出装置を形成する。
本実施例の沈殿池を用いた汚水処理装置は以下の４つの
工程を１サイクルとして、サイクルの繰返しで運転され
る。従って、以下の説明で、「前工程」とは、前記サイ
クルにおいて直前に行われた工程を意味する。
（１）流入工程
第１ａ図に示すように流入工程おいては、流量調整槽１
０より曝気槽１２へ汚水を移送する。１気槽１２におい
て活性汚泥と汚水が混合され、押し出しにより移流管２
０を介して、前工程で空となった沈殿池容器１４に移送
する。この時、給気装置２４は停止しており、排気装置
２２は開放状態にあるから、移流管２０から出た活性汚
泥混合液の本位が沈殿池容器１４内を上昇する。そして
、この工程は沈殿池容器１４内の水位が所定の位置ＨＷ
Ｌに達するまで続けられる。曝気槽１２は必要に応じて
散気装置１３により曝気される。
（２）沈殿工程
第１ｂ図に示すように沈殿工程おいては、流量調整槽１
０より曝気槽１２への送水を止める。すると、曝気槽１
２と沈殿池容器１４との間の流れも停止する。従って、
沈殿池容器１４内は静的に保たれ、前工程で流入した活
性汚泥混合液は上部の上澄水と下部の濃縮活性汚泥に分
離される。この時、給気装置２４と排気装置２２は共に
停止若しくは遮断され、排気流量は遮断状態にある。曝
気槽１２は必要に応じて散気装置１３により曝気される
。
（３）排出工程
第１ｃ図に示すように処理水排出工程おいては、沈殿池
容器１４の給気装置２４を運転若しくは通気し、排気装
ｆｆ２２を遮断する。すると、沈殿池容器１４内の圧力
が高まり、前工程で下部の濃縮活性汚泥と分離された上
部の上澄水の水面が押され、処理水排出装置２３の解放
により、沈殿池容器１４内の水位が前記所定の位置ＨＷ
Ｌ、から所定の位置ＬＷＬまで下がり、上澄水か排出
管２６より処理水として排出される。そして、曝気槽１
２は必要に応じて散気装置１３により曝気される。
（４ン汚泥移送工程
第１ｄ図に示すように汚泥移送工程おいては、前工程と
同様に給気装置２４を運転若しくは通気し、排気装置２
２を遮断すると共に、排出装置２８を遮断する。すると
、沈殿池容器１４内の圧力か更に高まり、前工程におい
て上澄水を排出された残余の濃縮活性汚泥が、移流管２
０を介して曝気槽１２へ移送される。曝気槽１２は必要
に応じて散気装置１３により曝気される。
沈殿池容器１４内の濃縮活性汚泥が所定レベルまで移送
し終わったところで、前記流入工程に移される。The embodiment will be explained with reference to FIGS. 1a to 1d. The sewage treatment apparatus using the sedimentation tank container of this embodiment is as follows:
Consisting of a flow rate adjustment tank 12, an aeration tank 12, and a settling tank container 14, sewage enters the flow rate adjustment tank 10 from an inflow pipe 16,
A transfer pump 18 sends the water to the aeration tank 12 . The upper part of the aeration tank 12 communicates with the bottom part of the sedimentation basin vessel 14 through an advection device, that is, an advection pipe 20. Connected to the upper part of the sedimentation tank container 14 are an exhaust device 22 for discharging and blocking the gas in the sedimentation tank container 14, and an air supply device 24 for supplying and blocking gas into the sedimentation tank container 14. Further, a discharge pipe 26 for discharging supernatant water is connected to the sedimentation tank container 14. The discharge pipe 26 has its tip 26
a is positioned at a predetermined height LWL within the sedimentation basin container 14, and is controlled to be discharged or shut off by a discharge device [28]. The discharge pipe 26 and the discharge device 28 form a treated water discharge device. The sewage treatment apparatus using the settling tank of this embodiment is operated by repeating the following four steps as one cycle. Therefore, in the following description, "previous step" means the step performed immediately before in the cycle. (1) Inflow process As shown in Figure 1a, in the inflow process, the flow rate adjustment tank 1
The wastewater is transferred from 0 to the aeration tank 12. Activated sludge and sewage are mixed in the 1-air tank 12 and transferred to the advection pipe 2 by extrusion.
0 to the sedimentation basin container 14 which was emptied in the previous step. At this time, the air supply device 24 is stopped and the exhaust device 22 is in an open state, so that the activated sludge mixture discharged from the advection pipe 20 rises inside the settling tank container 14. This step is performed until the water level in the sedimentation tank 14 reaches a predetermined position HW.
This continues until L is reached. The aeration tank 12 is aerated by an aeration device 13 as necessary. (2) Sedimentation process As shown in Figure 1b, in the precipitation process, the flow rate adjustment tank 1
Water supply to the aeration tank 12 is stopped from 0. Then, aeration tank 1
2 and the settling basin vessel 14 is also stopped. Therefore,
The inside of the sedimentation tank container 14 is kept static, and the activated sludge mixture that has flowed in in the previous step is separated into supernatant water in the upper part and concentrated activated sludge in the lower part. At this time, both the air supply device 24 and the exhaust device 22 are stopped or blocked, and the exhaust flow rate is in a blocked state. The aeration tank 12 is aerated by an aeration device 13 as necessary. (3) Discharge Step As shown in FIG. 1c, in the treated water discharge step, the air supply device 24 of the settling tank container 14 is operated or vented, and the exhaust device ff22 is shut off. Then, the pressure inside the sedimentation tank container 14 increases, and the water surface of the upper supernatant water that was separated from the lower concentrated activated sludge in the previous process is pushed, and the treated water discharge device 23 is released, causing the water level in the sedimentation tank container 14 to rise. is the predetermined position HW
L, to a predetermined position LWL, and is discharged as supernatant water or treated water from the discharge pipe 26. And aeration tank 1
2 is aerated by an aeration device 13 as necessary. (4-inch sludge transfer process As shown in Figure 1d, in the sludge transfer process, the air supply device 24 is operated or ventilated as in the previous process, and the exhaust device 2
2 and the discharge device 28 is also shut off. Then, the pressure inside the sedimentation tank 14 further increases, and the remaining concentrated activated sludge from which the supernatant water was discharged in the previous step flows into the advection tube 2.
0 to the aeration tank 12. The aeration tank 12 is aerated by an aeration device 13 as necessary. When the concentrated activated sludge in the settling tank container 14 has been transferred to a predetermined level, it is transferred to the inflow step.
本発明は、以上説明したように構成されているので、以
下に記載されるような効果を奏する。
■汚水の移送量の微量調整か必要ないため、維持管理が
容易である。
■流量調整槽より曝気槽へ汚水は、沈殿池容量相当分が
短時間で移送され、計量装置よりの返送水かないため、
移送装置の動力費か節約され、また寿命も伸びる。
■沈殿池内は完全に静的に保たれるため、沈殿効率がよ
い。
■沈殿池の構造（形状）の自由度か大きく、また、急角
度のホッパーを必要としないため、有効容量が大きくと
れ、省スペースとなる。
■計蓋装置、越流せき等が不要となり、付帯設備が少な
くてすむ。
■曝気槽はすべての工程を通じて曝気可能であるため、
回分式汚水処理装置と比較して、送風機は小型でよい。
■沈殿池の処理より前の工程の装置の構造は計量装置を
除いた連続式汚水処理装置と同様の構造を利用できるな
め、種々の構造、運転方法が適用可能である。Since the present invention is configured as described above, it produces the effects described below. ■ Maintenance is easy because only a small amount of adjustment of the amount of sewage to be transferred is required. ■The wastewater equivalent to the capacity of the sedimentation tank is transferred from the flow rate adjustment tank to the aeration tank in a short time, and there is no return water from the metering device.
The power cost of the transfer device is saved and its lifespan is extended. ■Sedimentation efficiency is high because the interior of the sedimentation tank is kept completely static. ■The structure (shape) of the sedimentation tank has a large degree of freedom, and a steeply angled hopper is not required, resulting in a large effective capacity and space saving. ■There is no need for a meter cover device, overflow weir, etc., and there is less need for incidental equipment. ■The aeration tank allows aeration throughout all processes, so
Compared to batch-type sewage treatment equipment, the blower can be smaller. ■The structure of the equipment for the process before the settling tank treatment can be the same as a continuous sewage treatment equipment except for the metering device, so various structures and operating methods can be applied.
第１ａ図〜第１ｄ図は、本発明の実施例にががる沈殿池
の処理工程図を示す概略説明図である。
第２ａ図〜第２ａ図は、従来の回分式汚水処理装置の処
理工程図を示す概略説明図である。
第３図は、従来の連続式汚水処理装置の処理工程図を示
す概略説明図である。
（この頁以下余白）
図中、参照数字は次のものを表す。
１０．３０．４２・・・流量調整槽、
１２．４６・・・曝気槽、
１３．３８．５６・・・散気装置、
１４・・・沈殿池容器、
１６．３４．５０・・・流入管、
１８．３６．５４・・・汚水移送ポンプ、２０・・・移
流装置（移流管）、
２２・・・排気装置、
２４・・・給気装置、
２６．４０ｂ、５２・・・排出管、
２８．４０ａ・・・排出装置、
３２・・・反応槽、
４４・・計量装置、
４８・・・沈殿槽、
５８・・・移送装置。Figures 1a to 1d are schematic explanatory diagrams showing processing steps of a settling tank according to an embodiment of the present invention. FIGS. 2a to 2a are schematic explanatory diagrams showing treatment process diagrams of a conventional batch-type sewage treatment apparatus. FIG. 3 is a schematic explanatory diagram showing a treatment process diagram of a conventional continuous sewage treatment apparatus. (Left space on this page) In the figure, reference numbers represent the following: 10.30.42...Flow rate adjustment tank, 12.46...Aeration tank, 13.38.56...Aeration device, 14...Sedimentation tank container, 16.34.50...Inflow Pipe, 18.36.54... Sewage transfer pump, 20... Advection device (advection pipe), 22... Exhaust device, 24... Air supply device, 26.40b, 52... Discharge pipe , 28.40a... Discharge device, 32... Reaction tank, 44... Measuring device, 48... Sedimentation tank, 58... Transfer device.
Claims (3)
泥を得る為の気密構造の沈殿池容器と、該沈殿池容器の
底部に接続された移流装置と、前記沈殿池容器の処理水
の水面下に接続された遮断可能な処理水排出装置と、前
記沈殿池容器に処理水の水面より上に接続された給気装
置と、前記沈殿池容器に処理水の水面より上に接続され
た遮断可能な排気装置とからなり、給気装置からの給気
および給気遮断と、排気装置による排気および排気遮断
と、処理水排出装置の開放および遮断とにより、沈殿池
容器内の処理水の上部における空間の空気量を増減して
、処理水を処理水排出装置から排出すると共に、移流装
置から濃縮活性汚泥の移送を行うようにした沈殿池。(1) A sedimentation tank container with an airtight structure for storing and treating the liquid to be treated to obtain treated water and concentrated activated sludge; an advection device connected to the bottom of the sedimentation tank container; a cutoff treated water discharge device connected below the surface of the treated water; an air supply device connected to the sedimentation tank container above the water surface of the treated water; and an air supply device connected to the sedimentation tank container above the water surface of the treated water. It consists of a connected exhaust device that can be shut off, and by supplying air from the air supply device and shutting off the supply air, exhaust and shutting off the exhaust air by the exhaust device, and opening and shutting off the treated water discharge device, A sedimentation tank in which the amount of air in the space above the treated water is increased or decreased to discharge the treated water from a treated water discharge device and to transfer concentrated activated sludge from an advection device.
た請求項１記載の沈殿池。(2) The sedimentation tank according to claim 1, wherein an aeration device is provided inside the sedimentation tank so as to double as an aeration tank.
の後に設置し、各沈殿池容器の移流装置を曝気槽に接続
すると共に、各沈殿池容器の沈殿時間をずらすことかで
きるようにして、沈殿池容器と給気装置を小型にした汚
水処理装置。(3) A plurality of sedimentation tank containers according to claim 1 can be installed in parallel after the aeration tank, and the advection device of each sedimentation tank container can be connected to the aeration tank, and the settling time of each sedimentation tank container can be staggered. This is a sewage treatment device with a compact settling tank and air supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168243A JP2931374B2 (en) | 1990-06-28 | 1990-06-28 | Intermittent sedimentation basin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168243A JP2931374B2 (en) | 1990-06-28 | 1990-06-28 | Intermittent sedimentation basin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0461902A true JPH0461902A (en) | 1992-02-27 |
| JP2931374B2 JP2931374B2 (en) | 1999-08-09 |
Family
ID=15864415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2168243A Expired - Fee Related JP2931374B2 (en) | 1990-06-28 | 1990-06-28 | Intermittent sedimentation basin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2931374B2 (en) |
-
1990
- 1990-06-28 JP JP2168243A patent/JP2931374B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2931374B2 (en) | 1999-08-09 |
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