JPH027604Y2 - - Google Patents
Info
- Publication number
- JPH027604Y2 JPH027604Y2 JP1984200242U JP20024284U JPH027604Y2 JP H027604 Y2 JPH027604 Y2 JP H027604Y2 JP 1984200242 U JP1984200242 U JP 1984200242U JP 20024284 U JP20024284 U JP 20024284U JP H027604 Y2 JPH027604 Y2 JP H027604Y2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- water
- treated water
- air
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- 239000010802 sludge Substances 0.000 claims description 63
- 238000007664 blowing Methods 0.000 claims description 22
- 238000011084 recovery Methods 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 10
- 239000006228 supernatant Substances 0.000 claims description 6
- 238000005273 aeration Methods 0.000 description 4
- 238000005187 foaming Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Sewage (AREA)
- Removal Of Floating Material (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、被処理水中の汚泥を沈降分離して、
汚泥と浄化水とを別々に槽外に取出すようにした
沈澱池に関し、詳しくは、沈澱槽の上部に、該槽
に対して一定の位置関係を保つ処理水回収樋を連
設し、汚泥吸込口を底面近くに位置させた汚泥排
出装置によつて沈降汚泥を槽外に排出すると共
に、上澄水を沈澱槽から前記処理水回収樋へとオ
ーバーフローさせて、槽外に放出するようにした
沈澱池に関するものである。[Detailed description of the invention] (Industrial application field) The invention is based on sedimentation and separation of sludge in the water to be treated.
Regarding a sedimentation tank in which sludge and purified water are taken out of the tank separately, in detail, a treated water recovery gutter is connected to the upper part of the settling tank to maintain a fixed positional relationship with the tank, and the sludge suction A sedimentation system in which settled sludge is discharged outside the tank by a sludge discharge device whose mouth is located near the bottom surface, and supernatant water is overflowed from the sedimentation tank to the treated water recovery gutter and discharged outside the tank. It's about a pond.
（従来の技術）
上記の沈澱池において従来は、沈降汚泥を前記
汚泥吸込口に向けて落下させる傾斜壁面部を形成
すると共に、該傾斜壁面部に沿つて移動するレー
キや鎖等から成る汚泥掻取装置を配設して、前記
傾斜壁面部に付着した汚泥を前記汚泥吸込口に向
けて強制移動させるようにしている。(Prior Art) Conventionally, in the above-mentioned settling tank, a sloping wall part is formed to cause the settled sludge to fall toward the sludge suction port, and a sludge scraper consisting of a rake, a chain, etc. that moves along the sludge wall part is formed. A removal device is provided to forcibly move the sludge adhering to the sludge wall toward the sludge suction port.
上記の手段によれば、沈降汚泥を効果的に回収
できる反面、沈澱池が大型になるほど汚泥掻取装
置が大掛りになつて、イニシアルコストは勿論の
ことランニングコストも高くつく欠点があり、更
に、回収しきれない汚泥があるとこれが腐敗して
スカムと化し、これが浮遊する欠点もあつた。 Although the above means can effectively recover settled sludge, it has the drawback that the larger the settling tank, the larger the sludge scraping device, which increases not only the initial cost but also the running cost. Another drawback was that if there was sludge that could not be collected, it would rot and turn into scum, which would float.
（考案が解決しようとする問題点）
本考案は、上記の実情に鑑みて案出されたもの
であつて、前記汚泥吸込口に向けて沈降汚泥を強
制移動させる手段として、空気を利用することに
より大幅なコストダウンを達成すると同時に、空
気を利用したことにより派生する問題点、つま
り、空気を槽内に吹き込むと、汚泥の巻き上がり
と水面の上昇のために、沈澱すべき汚泥の一部が
上澄水を取り出す処理水回収樋へとオーバーフロ
ーしてしまい、処理の悪化をきたすという問題点
を解決できるようにすることを目的としている。(Problems to be solved by the invention) The present invention was devised in view of the above-mentioned circumstances, and uses air as a means for forcibly moving settled sludge toward the sludge suction port. At the same time, we have achieved significant cost reductions by using air, and at the same time, there are problems that arise when air is blown into the tank. The purpose of this project is to solve the problem of overflowing into the treated water recovery gutter from which the supernatant water is taken out, resulting in deterioration of the treatment process.
（問題点を解決するための手段）
上記目的を達成するために本考案は、冒頭に記
載の沈澱池において、前記沈澱汚泥を前記吸込口
に向けて落下させる傾斜壁面部に、該傾斜壁面部
に付着した汚泥を当該傾斜壁面部に沿わせて強制
的に吹き落とすための空気吹出口を配設すると共
に、前記処理水回収槽には、この吹出口からの空
気吹出しに先立つて、少なくとも空気吹出しに起
因する見掛け上の水量増大分を前記処理水回収樋
に排水して水面レベルを低下させるための排水装
置を設けた点に特徴がある。(Means for Solving the Problems) In order to achieve the above object, the present invention provides, in the sedimentation tank described at the beginning, a sloped wall portion that allows the settled sludge to fall toward the suction port. An air outlet is provided for forcibly blowing off the sludge adhering to the sludge along the sloped wall, and at least air is supplied to the treated water recovery tank prior to blowing air out from the outlet. A feature of the present invention is that a drainage device is provided for draining the apparent increase in water volume due to blowing into the treated water recovery gutter to lower the water surface level.
（作用）
上記の特徴構成によれば、空気の噴出によつて
傾斜壁面部の汚泥を汚泥排出装置の吸込口に向け
て強制落下させることができ、かつ、空気供給に
よつて槽内の被処理水を好気条件下におくことが
できるので、腐敗によるスカムの発生を抑制でき
る。(Function) According to the above characteristic structure, the sludge on the sloped wall surface can be forced to fall toward the suction port of the sludge discharge device by the air jet, and the air can be supplied to the tank to cover the sludge inside the tank. Since the treated water can be kept under aerobic conditions, the generation of scum due to putrefaction can be suppressed.
また、上記の空気吹出しに先立つて、少なくと
も空気吹出しに起因する見掛け上の水量増大分を
前記処理水回収樋に排水して水面レベルを低下さ
せるので、空気の吹出しに伴う汚泥の巻き上がり
や水面の上昇、泡立ちによつて、槽内の汚泥を含
む被処理水が上澄水を取り出すための処理水回収
樋へとオーバーフローすることがなく、処理水の
悪化を招くことがない。 In addition, prior to the above air blowing, at least the apparent increase in water volume caused by the air blowing is drained into the treated water recovery gutter to lower the water surface level, so that the sludge is not rolled up due to the air blowing and the water surface is lowered. Due to the rise in water and foaming, the treated water containing sludge in the tank will not overflow into the treated water recovery gutter for taking out the supernatant water, and the treated water will not deteriorate.
（実施例）
以下、本考案の実施例を図面に基づいて説明す
ると、第２図は活性汚泥による排水の生物学的処
理のフローシートを示し、第１沈澱池１において
排水中の汚泥が１次分離され、その分離汚泥が濃
縮槽２に、かつ、処理水が曝気槽３に導入され
る。(Example) Hereinafter, an example of the present invention will be described based on the drawings. Fig. 2 shows a flow sheet for biological treatment of wastewater using activated sludge, and the sludge in the wastewater in the first sedimentation tank 1 is The sludge is then separated, and the separated sludge is introduced into the thickening tank 2 and the treated water is introduced into the aeration tank 3.
そして曝気処理後の被処理水が２次沈澱池４に
導入され、ここで、被処理水が上澄液である処理
水と沈澱汚泥とに分離されて、沈澱汚泥の一部が
前記曝気槽３に返送され、かつ、残部が前記汚泥
濃縮槽２に導入される。 The water to be treated after the aeration treatment is introduced into the secondary settling tank 4, where the water to be treated is separated into treated water, which is a supernatant liquid, and settled sludge, and a part of the settled sludge is transferred to the aeration tank. 3, and the remainder is introduced into the sludge thickening tank 2.
そして、濃縮後の汚泥は処理設備５に送り込ま
れ、前記２次処理水は河川等に放流されるのであ
る。 The sludge after concentration is sent to the treatment facility 5, and the secondary treated water is discharged into a river or the like.
前記２次沈澱池４はドルトムントタイプのもの
であつて、第１図に示すように、底壁６側のコー
ナーに傾斜壁面部７が設けられた沈澱槽８に、曝
気処理後の被処理水の導入管９を接続すると共
に、沈澱槽８の上部側に、上澄液である処理水を
オーバーフローによつて回収する処理水回収樋１
０を図示の通り固定的に、つまり沈澱槽８に対し
て一定の位置関係を保つように連設し、そして、
エアーリフトポンプAP等による沈澱汚泥の排出
装置１１を、それの汚泥吸込口１２を底壁６の上
面近くに位置させて設けると共に、前記傾斜壁面
部７に沈澱付着した汚泥を前記汚泥吸込口１２に
向けて強制移動させる汚泥吹き落し装置１３と、
少なくとも空気吹出しに起因する見掛け上の水量
増大分を前記処理水回収樋１０に排水して水面レ
ベルを低下させるため排水装置１４とを設けてあ
る。 The secondary sedimentation tank 4 is of the Dortmund type, and as shown in FIG. In addition to connecting the inlet pipe 9 of
0 are fixedly connected as shown in the figure, that is, so as to maintain a constant positional relationship with respect to the sedimentation tank 8, and
A settled sludge discharge device 11 using an air lift pump AP or the like is provided with its sludge suction port 12 located near the top surface of the bottom wall 6, and the sludge deposited on the inclined wall surface 7 is removed from the sludge suction port 12. A sludge blowing device 13 forcibly moving the sludge toward the
A drainage device 14 is provided to drain at least an apparent increase in water volume due to air blowing into the treated water recovery gutter 10 to lower the water surface level.
前記汚泥吹き落し装置１３は次のように構成さ
れている。即ち、所定間隔をへだてて長手方向に
多数の空気吹出し用ノズル孔を穿設したパイプ１
５を、前記ノズル孔の空気吹出し方向を傾斜壁面
部７に沿わせて下方に向ける状態で、傾斜壁面部
７の上下中間部位に配置すると共に、開閉弁V1
を備えた空気供給管１６を前記パイプ１５に連通
連設し、かつ、該空気供給管１６を、前記曝気槽
３における曝気用空気供給装置（図外）に接続し
て成り、曝気用空気の一部を前記ノズル孔から吹
出して、前記傾斜壁面部７に付着の汚泥を当該壁
面部７に沿わせて、かつ、前記汚泥排出装置１１
の汚泥吸込口１２に向けて強制的に吹き落すよう
にしてある。 The sludge blowing device 13 is constructed as follows. That is, a pipe 1 has a number of air blowing nozzle holes drilled in the longitudinal direction at predetermined intervals.
5 is disposed at an intermediate position between the upper and lower sides of the inclined wall section 7, with the air blowing direction of the nozzle hole facing downward along the inclined wall section 7, and an on-off valve V 1
An air supply pipe 16 with a A part of the sludge is blown out from the nozzle hole to make the sludge adhering to the inclined wall part 7 follow the wall part 7, and the sludge discharging device 11
The sludge is forcibly blown down toward the sludge suction port 12.
この汚泥吹き落し空気の供給によつて槽内処理
水の見掛けの容量が増大し、かつ、水面で泡立ち
を起し、このままでは舞い上がつた汚泥を含む被
処理水が回収樋１０から槽外に排出されることに
なる。 By supplying this sludge-blowing air, the apparent capacity of the treated water in the tank increases, and the water to be treated containing the sludge that bubbles on the water surface and flies up flows from the collection gutter 10 to the outside of the tank. will be discharged.
この不都合を事前に解消するために、前記水面
レベルを低下させる排水装置１４が設けられてい
る。 In order to eliminate this inconvenience in advance, a drainage device 14 is provided to lower the water surface level.
この排水装置１４は、一端が槽内に開口ａし、
他端が槽外（具体的には前記回収樋１０の内部）
に開口ｂした略逆Ｕ字状であつて、かつ、当該開
口ｂの近傍部分を略Ｕ字状に屈曲して水封用水溜
め部１７ｂを形成したサイフオン管１７を設け、
このサイフオン管１７の上端部（逆Ｕ字状屈曲
部）から上方へ通気管１７ａを連通連設し、この
通気管１７ａに、空気出口１８ａが大気中に開口
した空気供給管１８を接続し、この接続部よりも
上流側の空気供給管１８部分に電磁開閉弁V2を
設け、この空気供給管１８を前記図外の曝気用空
気供給装置に接続して構成したものである。前記
開口ｂの高さ位置は、前記見掛け容量の増大なら
びに泡立ちを生じても槽内の被処理水が回収樋１
０に排出されない水位を基にして設定されるもの
であり、この水位に相当するレベルに開口ｂして
いる。 This drainage device 14 has one end opening a into the tank,
The other end is outside the tank (specifically, inside the collection gutter 10)
A siphon tube 17 is provided, which has a substantially inverted U-shape with an opening b, and a portion near the opening b is bent into a substantially U-shape to form a water seal water reservoir portion 17b,
A ventilation pipe 17a is connected upwardly from the upper end (inverted U-shaped bent part) of the siphon pipe 17, and an air supply pipe 18 having an air outlet 18a open to the atmosphere is connected to the ventilation pipe 17a. An electromagnetic on-off valve V2 is provided in a portion of the air supply pipe 18 upstream of this connection, and this air supply pipe 18 is connected to the aeration air supply device (not shown). The height position of the opening b is such that even if the apparent capacity increases and foaming occurs, the water to be treated in the tank can still flow through the collection gutter 1.
It is set based on the water level at which the water is not discharged to zero, and the opening b is at a level corresponding to this water level.
従つて、沈澱槽８に対する被処理水の供給を停
止した状態で、前記弁V2を開くと、空気の流れ
により、前記通気管１７ａが減圧され、槽内の被
処理水及び水封用水溜め部１７ｂの水が吸い上げ
られて互いにつながるので、サイフオン管１７内
に水が満たされて、サイフオン現象が生じる。従
つて、槽内の水が前記回収樋１０へとサイフオン
現象によつて排出され、槽内の水位は開口ｂと同
一レベルになるまで下降することになる。 Therefore, when the valve V 2 is opened with the supply of water to be treated to the settling tank 8 stopped, the pressure in the vent pipe 17a is reduced by the flow of air, and the water to be treated in the tank and the water sealing water reservoir are reduced. Since the water in the portions 17b is sucked up and connected to each other, the siphon tube 17 is filled with water and a siphon phenomenon occurs. Therefore, the water in the tank is discharged to the recovery gutter 10 by the siphon phenomenon, and the water level in the tank drops to the same level as the opening b.
尚、槽内における前記開口ａは、前記開口ｂよ
りも下方に位置させてあるが、この開口ａを前記
レベルに配置し、槽外の開口ｂをそのレベル以下
に配置して実施することも可能である。 Although the opening a inside the tank is located below the opening b, it is also possible to arrange the opening a at the level and the opening b outside the tank below that level. It is possible.
尚、前記汚泥吹き落し装置１３と排水装置１４
とに対する専用の空気供給装置を設置するも良
く、また排水装置１４として、第３図に示すよう
に、所定レベルで開口するパイプ１９の吐出口を
槽外（たとえば処理水回収樋１０内）に配置し
て、該パイプ１９に電磁開閉弁Ｖを設ける構成
や、手動や電動ポンプによる排水構成などに変更
可能である。 In addition, the sludge blowing device 13 and the drainage device 14
It is also possible to install a dedicated air supply device for the draining device 14, as shown in FIG. It is possible to change the arrangement to a configuration in which the pipe 19 is provided with an electromagnetic on-off valve V, or a drainage configuration using a manual or electric pump.
また、汚泥吹き落し装置１３において、それの
パイプ１５を上下に複数個配設したり、前記ノズ
ル孔に市販のノズルを取付けたり、あるいは、ノ
ズルに代えて細いスリツトにする等の変形が可能
である。 Further, the sludge blowing device 13 can be modified by arranging a plurality of pipes 15 above and below, attaching a commercially available nozzle to the nozzle hole, or replacing the nozzle with a thin slit. be.
（考案の効果）
以上説明したように本考案は、汚泥排出装置の
吸込口に向けて汚泥を落下させる傾斜壁面部に付
着した汚泥を、空気の吹出しによつて強制的に吹
き落すものであつて、かかる汚泥吹き落し装置に
よれば、イニシアルコストが従来の機械式汚泥掻
取装置とは比べものにならないほどに安価にな
り、しかも、汚泥吹き落しのための空気も安価に
得られ、あるいは、排水処理にとつて不可欠で且
つ余剰気味に設備される空気の利用も容易であつ
て、ランニングコストの大巾低減を達成でき、か
つ、メンテナンスも容易であり、スカムの発生も
効果的に防止できる。(Effects of the invention) As explained above, the invention forcibly blows off the sludge adhering to the sloped wall surface part where the sludge falls toward the suction port of the sludge discharge device by blowing out air. According to such a sludge blowing device, the initial cost is incomparably lower than that of a conventional mechanical sludge scraping device, and air for sludge blowing can also be obtained at a low cost. It is easy to use the air that is essential for wastewater treatment and is available in surplus equipment, and it is possible to achieve a significant reduction in running costs, easy maintenance, and effectively prevent the generation of scum. .
それでいて、処理水回収槽に設けた排水装置に
より、空気の吹出しに先立つて、少なくとも空気
吹出しに起因する見掛け上の水量増大分を前記処
理水回収樋に排水して水面レベルを低下させるの
で、空気の吹出しに伴う汚泥の巻き上がりや水面
の上昇、泡立ちによつて、槽内の汚泥を含む被処
理水が上澄水を取り出すための処理水回収樋へと
オーバーフローすることがなく、処理水の悪化を
招くことがない。 However, prior to blowing out air, the drainage device installed in the treated water recovery tank drains at least the apparent increase in water volume caused by air blowing into the treated water recovery gutter to lower the water surface level. Due to the rolling up of sludge, rising of the water level, and foaming caused by the blowing out of water, the treated water containing sludge in the tank does not overflow into the treated water collection gutter from which the supernatant water is taken out, and the treated water deteriorates. It never invites.
図面は本考案の実施例を示し、第１図は沈澱池
の断面図、第２図は排水処理設備のフローシー
ト、第３図は排水装置の別実施例の断面図であ
る。
７……傾斜壁面部、１１……汚泥排出装置、１
２……汚泥吸込口、１４……排水装置。
The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of a sedimentation tank, FIG. 2 is a flow sheet of a wastewater treatment facility, and FIG. 3 is a sectional view of another embodiment of a drainage device. 7... Inclined wall section, 11... Sludge discharge device, 1
2...Sludge suction port, 14...Drainage device.
Claims (1)
を保つ処理水回収樋を連設し、汚泥吸込口を底面
近くに位置させた汚泥排出装置によつて沈降汚泥
を槽外に排出すると共に、上澄水を沈澱槽から前
記処理水回収樋へとオーバーフローさせて、槽外
に放出するようにした沈澱池において、前記沈澱
汚泥を前記吸込口に向けて落下させる傾斜壁面部
に、該傾斜壁面部に付着した汚泥を当該傾斜壁面
部に沿わせて強制的に吹き落とすための空気吹出
口を配設すると共に、前記処理水回収樋には、こ
の吹出口からの空気吹出しに先立つて、少なくと
も空気吹出しに起因する見掛け上の水量増大分を
前記処理水回収樋に排水して水面レベルを低下さ
せるための排水装置を設けてあることを特徴とす
る沈澱池。 A treated water recovery gutter that maintains a fixed positional relationship with the settling tank is connected to the top of the settling tank, and the settled sludge is discharged to the outside of the tank by a sludge discharge device with a sludge suction port located near the bottom. At the same time, in the settling tank in which the supernatant water overflows from the settling tank to the treated water recovery gutter and is discharged to the outside of the tank, a slope is provided on the sloped wall portion that allows the settled sludge to fall toward the suction port. An air outlet is provided for forcibly blowing off the sludge adhering to the wall along the inclined wall, and the treated water recovery gutter is equipped with: A sedimentation tank characterized in that a drainage device is provided for draining at least an apparent increase in water volume due to air blowing into the treated water recovery gutter to lower the water surface level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984200242U JPH027604Y2 (en) | 1984-12-30 | 1984-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984200242U JPH027604Y2 (en) | 1984-12-30 | 1984-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61118604U JPS61118604U (en) | 1986-07-26 |
| JPH027604Y2 true JPH027604Y2 (en) | 1990-02-23 |
Family
ID=30760907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984200242U Expired JPH027604Y2 (en) | 1984-12-30 | 1984-12-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027604Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005246272A (en) * | 2004-03-05 | 2005-09-15 | Kubota Corp | Sand pumping apparatus and sand pumping method using sand pumping apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5958098U (en) * | 1982-10-12 | 1984-04-16 | 株式会社西原環境衛生研究所 | Batch type activated sludge treatment equipment |
-
1984
- 1984-12-30 JP JP1984200242U patent/JPH027604Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61118604U (en) | 1986-07-26 |
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