JPH03293098A - Device and method for separating and thickening system type treatment of sludge - Google Patents
Device and method for separating and thickening system type treatment of sludgeInfo
- Publication number
- JPH03293098A JPH03293098A JP2094070A JP9407090A JPH03293098A JP H03293098 A JPH03293098 A JP H03293098A JP 2094070 A JP2094070 A JP 2094070A JP 9407090 A JP9407090 A JP 9407090A JP H03293098 A JPH03293098 A JP H03293098A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- tank
- thickening
- concentration
- gravity
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 85
- 230000008719 thickening Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 5
- 230000005484 gravity Effects 0.000 claims abstract description 13
- 230000029087 digestion Effects 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000000855 fermentation Methods 0.000 abstract description 5
- 230000004151 fermentation Effects 0.000 abstract description 5
- 230000018044 dehydration Effects 0.000 abstract description 4
- 238000006297 dehydration reaction Methods 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 2
- 208000005156 Dehydration Diseases 0.000 abstract 2
- 238000005496 tempering Methods 0.000 abstract 1
- 238000005273 aeration Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Abstract
Description
本発明は、分離濃縮システムを採用した汚泥処理に関し
、具体的には分離濃縮システムを採用した汚泥処理にお
ける汚泥の調質方法に関する。The present invention relates to sludge treatment using a separation and concentration system, and specifically relates to a method for refining sludge in sludge treatment using a separation and concentration system.
従来の分離濃縮システム型汚泥処理にあっては、第２図
に示すように、前段水処理系からの供給汚水を最初沈殿
槽１０で沈殿物を落とした汚水を接触曝気槽１２に流入
させて接触曝気処理し、接触曝気処理した汚水を最終沈
殿槽１４で沈殿処理させ、最終沈殿槽１４の上澄液を消
毒槽１６で消毒した後、放流している。
最初沈殿槽１０で生じた初沈汚泥を重力濃縮槽１１で濃
縮して消化槽１８に送り、また最終沈殿槽１４で生じた
余剰活性汚泥を強制濃縮機１５で濃縮して消化槽１８に
送り、消化槽１８から出た消化汚泥を脱水１ＩＡ２０で
脱水している。脱水ｆｉ２０で脱水された汚泥は汚泥ケ
ーキとして搬出し、水は水処理装置へ返送する。また、
最終沈殿槽１４で強制濃縮により生じた余剰活性濃縮汚
泥の一部を接触曝気槽１２の流入側に返送する。In the conventional separation and concentration system type sludge treatment, as shown in FIG. The contact aerated wastewater is subjected to a precipitation treatment in a final settling tank 14, and the supernatant liquid in the final settling tank 14 is disinfected in a disinfection tank 16 and then discharged. The initial settled sludge produced in the initial settling tank 10 is concentrated in the gravity thickening tank 11 and sent to the digestion tank 18, and the excess activated sludge produced in the final settling tank 14 is concentrated in the forced thickener 15 and sent to the digestion tank 18. , the digested sludge discharged from the digestion tank 18 is dehydrated by dehydration 1IA20. The sludge dehydrated by the dehydration fi20 is carried out as a sludge cake, and the water is returned to the water treatment equipment. Also,
A portion of the surplus activated thickened sludge produced by forced concentration in the final settling tank 14 is returned to the inflow side of the contact aeration tank 12.
従来の分離濃縮システム型汚泥処理にあっては、年月の
経過と共に脱水機の性能が悪くなるという問題点があっ
た。
本発明者は、脱水機性能劣化の原因を鋭意調査した結果
、最初沈殿槽で生じた初沈汚泥と最終沈殿槽で生じた余
剰活性濃縮汚泥を別々に消化槽に投入していることが、
脱水機の性能を劣化させていることを発見した。
従って、本発明は分離濃縮システムを採用した汚泥処理
における汚泥を調質する方法及び装置を提供することを
目的としている。In the conventional separation/concentration system type sludge treatment, there was a problem in that the performance of the dehydrator deteriorated over time. As a result of intensive investigation into the cause of dehydrator performance deterioration, the inventor found that the initial settled sludge produced in the initial settling tank and the surplus activated thickened sludge produced in the final settling tank were separately charged into the digestion tank.
I discovered that it was deteriorating the performance of the dehydrator. Therefore, an object of the present invention is to provide a method and apparatus for refining sludge in sludge treatment using a separation and concentration system.
上記目的を達成するために、本発明の分離濃縮システム
型汚泥処理においては、最初沈殿槽で生じた初沈汚泥を
重力濃縮した濃縮汚泥と、最終沈殿槽で生じた余剰活性
汚泥を強制濃縮した高濃度汚泥と、消化槽から引き抜い
た引抜汚泥とを調質混合してから消化槽に投入する。In order to achieve the above object, in the separation and concentration system type sludge treatment of the present invention, the initial settled sludge produced in the initial settling tank is concentrated by gravity to obtain thickened sludge, and the excess activated sludge produced in the final settling tank is forcibly concentrated. The highly concentrated sludge and the drawn sludge extracted from the digestion tank are tempered and mixed before being put into the digestion tank.
【作用１
上記のように構成された分離濃縮システム型汚泥処理に
おいては、初沈汚泥を重力濃縮した濃縮汚泥と余剰活性
汚泥を強制濃縮した高濃度汚泥との混合時に引抜汚泥が
種汚泥となり、消化処理されやすい高濃度汚泥混合体と
なる。従って、消化槽における醗酵の効率が良くなり、
さらに、消化槽から出た消化汚泥が脱水処理されやすく
なって、脱水機の：Ｉ！Ａｓ効率が維持される。
【実施例】
実株例について図面を参照して説明すると、第１図は、
第２図の従来技術に対応させて本発明の構成を示す。
前段水処理系からの供給汚水を最初沈殿槽１０で沈殿物
を落とした汚水を接触曝気槽１２に流入させて接触曝気
処理する。そして、接触曝気処理した汚水を最終沈殿槽
１４で沈殿処理させ、最終沈殿槽１４の上澄液を消毒槽
１６で消毒した後、放流する。
最終沈殿槽１４から出た余剰活性汚泥は、遠心濃縮機で
強制濃縮を行う、また、最終沈殿槽１４で強制濃縮によ
り生じた余剰活性汚泥の一部を接触曝気槽１２の流入側
に返送する。
本発明では、最初沈殿槽１０と重力濃縮槽１１とを経て
生した初沈濃縮汚泥（濃縮汚泥）、および最終沈殿槽１
４と強制濃縮Ｉ！１５とを経て生じた余剰活性濃縮汚泥
（高濃度汚泥）は混合槽２２に送り、また消化槽１８か
ら引き抜いた消化汚泥の一部を混合槽２２に送る。初沈
濃縮汚泥と余剰活性濃縮汚泥と消化汚泥とを混合槽２２
で調質しながら混合するが、このとき消化汚泥か種汚泥
として作用しはじめる。この結果、混合槽２２から出た
混合体は醗酵に対して活性なものとなるので、該混合体
を消化槽に入れると、醗酵が速やかに行われる。
消化槽１８から出た消化汚泥は、脱水機２０で脱水して
脱水ケーキとして搬出し、水は水処理装置へ返送する。
（発明の効果］
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。
遠心濃縮機に入る消化汚泥が脱水処理されやすい形にな
っているので、遠心源ｌａ機の濃縮効率が劣化しない。[Effect 1] In the separation and concentration system type sludge treatment configured as above, when the concentrated sludge obtained by gravity concentration of initial settling sludge is mixed with the high concentration sludge obtained by forced concentration of surplus activated sludge, the drawn sludge becomes seed sludge, It becomes a highly concentrated sludge mixture that is easily digested. Therefore, the efficiency of fermentation in the digester is improved,
Furthermore, the digested sludge coming out of the digester becomes easier to dehydrate, and the dehydrator's :I! As efficiency is maintained. [Example] An example of a real stock will be explained with reference to the drawings. Figure 1 shows the following:
The configuration of the present invention is shown in correspondence with the prior art shown in FIG. The sewage supplied from the front stage water treatment system is first subjected to contact aeration treatment by being drained of sediment in the settling tank 10 and flowing into the contact aeration tank 12. Then, the contact aerated wastewater is subjected to sedimentation treatment in the final sedimentation tank 14, and the supernatant liquid of the final sedimentation tank 14 is disinfected in the disinfection tank 16, and then discharged. The surplus activated sludge discharged from the final settling tank 14 is forcibly concentrated using a centrifugal thickener, and a portion of the surplus activated sludge produced by the forced concentration in the final settling tank 14 is returned to the inflow side of the contact aeration tank 12. . In the present invention, the first settled and concentrated sludge (thickened sludge) produced through the first settling tank 10 and the gravity thickening tank 11, and the final settling tank 1
4 and forced enrichment I! The surplus activated thickened sludge (high concentration sludge) produced through 15 is sent to the mixing tank 22, and a part of the digested sludge drawn out from the digestion tank 18 is sent to the mixing tank 22. The initial settled thickened sludge, excess activated thickened sludge, and digested sludge are mixed in tank 22.
At this time, the sludge begins to act as either digested sludge or seed sludge. As a result, the mixture discharged from the mixing tank 22 becomes active for fermentation, so that when the mixture is placed in the digestion tank, fermentation is quickly carried out. Digested sludge discharged from the digestion tank 18 is dehydrated by a dehydrator 20 and carried out as a dehydrated cake, and the water is returned to the water treatment device. (Effects of the Invention) Since the present invention is configured as described above, it achieves the effects as described below. Since the digested sludge entering the centrifugal thickener is in a form that is easy to dehydrate, The concentration efficiency of the centrifugal source LA machine does not deteriorate.
第１図は、本発明の一実施例にかかる汚泥処理の流れを
示すフローチャートである。
第２図は、従来の分Ｍ？１．縮システム型汚泥処理の流
れを示すフローチャートである。
（この頁以下余白）
図中、
１０・・
１１・・
１２・・
１４・・
１５・・
１６・・
１８・・
２０・・
２２・・
参照数字は次のものを表す７
・最初沈殿槽、
・重力濃縮槽、
・接触曝気槽、
・最終沈殿槽、
・強制源１ＩＩｒ！Ａ、
・消毒槽、
・消化槽、
・脱水機、
・混合槽。FIG. 1 is a flow chart showing the flow of sludge treatment according to an embodiment of the present invention. Figure 2 shows the conventional minute M? 1. 1 is a flowchart showing the flow of a reduction system type sludge treatment. (Margins below this page) In the figure, 10... 11... 12... 14... 15... 16... 18... 20... 22... The reference numbers represent the following 7 - First settling tank,・Gravity concentration tank, ・Contact aeration tank, ・Final sedimentation tank, ・Forced source 1IIr! A. ・Disinfection tank, ・Digestion tank, ・Dehydrator, ・Mixing tank.
Claims (2)
を強制濃縮した高濃度汚泥とを消化槽で消化処理する分
離濃縮システム型汚泥処理装置において、初沈汚泥を重
力濃縮する重力濃縮装置及び余剰活性汚泥を強制濃縮す
る強制濃縮装置を混合槽を介して消化槽に接続し、重力
濃縮による濃縮汚泥と、強制濃縮による高濃度汚泥と、
消化槽から引抜いた引抜汚泥とを混合槽で調質混合する
ようにしたことを特徴とする汚泥処理装置。(1) In a separation and concentration system type sludge treatment equipment that digests concentrated sludge obtained by gravity concentration of initial settling sludge and high-concentration sludge obtained by forcibly concentrating excess activated sludge in a digestion tank, a gravity concentration device that gravity concentrates initial settling sludge A forced thickening device for forcibly thickening surplus activated sludge is connected to the digestion tank via a mixing tank, and thickened sludge by gravity thickening, high concentration sludge by forced thickening,
A sludge treatment device characterized in that the drawn sludge drawn from the digestion tank is tempered and mixed in a mixing tank.
を強制濃縮した高濃度汚泥とを消化処理する分離濃縮シ
ステム型汚泥処理方法において、初沈汚泥を重力濃縮し
た濃縮汚泥と余剰活性汚泥を強制濃縮した高濃度汚泥と
を消化処理によつて生じた汚泥と共に調質混合し、該調
質混合した汚泥を消化処理することを特徴とする汚泥処
理方法。(2) In a separation and concentration system type sludge treatment method that digests thickened sludge obtained by gravity concentration of initial settling sludge and high concentration sludge obtained by forcibly concentrating surplus activated sludge, thickened sludge obtained by gravity concentration of initial settling sludge and surplus activated sludge are used. 1. A sludge treatment method comprising: mixing high-concentration sludge forcibly concentrated with sludge produced by digestion, and subjecting the mixed sludge to digestion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2094070A JPH03293098A (en) | 1990-04-11 | 1990-04-11 | Device and method for separating and thickening system type treatment of sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2094070A JPH03293098A (en) | 1990-04-11 | 1990-04-11 | Device and method for separating and thickening system type treatment of sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03293098A true JPH03293098A (en) | 1991-12-24 |
Family
ID=14100246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2094070A Pending JPH03293098A (en) | 1990-04-11 | 1990-04-11 | Device and method for separating and thickening system type treatment of sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03293098A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990494A (en) * | 1982-11-15 | 1984-05-24 | Matsushita Electric Ind Co Ltd | Audio equipment |
| JPWO2012147467A1 (en) * | 2011-04-26 | 2014-07-28 | 水ｉｎｇ株式会社 | Sludge concentration method and apparatus |
-
1990
- 1990-04-11 JP JP2094070A patent/JPH03293098A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990494A (en) * | 1982-11-15 | 1984-05-24 | Matsushita Electric Ind Co Ltd | Audio equipment |
| JPWO2012147467A1 (en) * | 2011-04-26 | 2014-07-28 | 水ｉｎｇ株式会社 | Sludge concentration method and apparatus |
| JP2017100130A (en) * | 2011-04-26 | 2017-06-08 | 水ｉｎｇ株式会社 | Anaerobic digestion treatment method and anaerobic digestion treatment device |
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