JPS60222200A - Thickening method of organic sludge - Google Patents
Thickening method of organic sludgeInfo
- Publication number
- JPS60222200A JPS60222200A JP59078690A JP7869084A JPS60222200A JP S60222200 A JPS60222200 A JP S60222200A JP 59078690 A JP59078690 A JP 59078690A JP 7869084 A JP7869084 A JP 7869084A JP S60222200 A JPS60222200 A JP S60222200A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- screen
- organic sludge
- water
- hydropulper
- 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 48
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008719 thickening Effects 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000010893 paper waste Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims description 8
- 238000005189 flocculation Methods 0.000 claims description 3
- 230000016615 flocculation Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 230000003311 flocculating effect Effects 0.000 abstract description 3
- 239000008394 flocculating agent Substances 0.000 abstract 2
- 150000001768 cations Chemical class 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 238000005188 flotation Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010899 old newspaper Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、下水、し尿、各種産業廃水などの有機性汚水
処理において発生する有機性汚泥を効果的に濃縮する方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for effectively concentrating organic sludge generated in the treatment of organic sewage such as sewage, human waste, and various industrial wastewater.
下水、し尿、各種産業廃水などの有機性汚水処理から発
生する有機性汚泥は、脱水されたのちに処理、処分され
ているが、このような汚泥を効率的に脱水するためには
、脱水機へ供給する前に濃縮し、汚泥の濃度を高めるこ
とがとシわけ重要である。Organic sludge generated from the treatment of organic sewage such as sewage, human waste, and various industrial wastewater is treated and disposed of after being dehydrated. It is particularly important to increase the concentration of sludge by thickening it before supplying it to the sludge.
従来、有機性汚泥を濃縮するには、沈殿濃縮法が最も広
く採用されているが、余剰活性汚泥のように難濃縮性の
汚泥は、沈殿濃縮しても濃度２５％以上に濃縮すること
は困難である。とくに、最近の下水余剰活性汚泥は、濃
縮性が年々悪化してきており、バルキング状の余剰活性
汚泥は２チ以上に沈殿濃縮することも困難になっている
のが実状である。Conventionally, the precipitation and concentration method has been most widely used to thicken organic sludge, but sludge that is difficult to thicken, such as surplus activated sludge, cannot be concentrated to a concentration of 25% or higher even with precipitation and concentration. Have difficulty. In particular, the thickening properties of recent sewage surplus activated sludge have been getting worse year by year, and the reality is that it has become difficult to precipitate and concentrate bulking-like surplus activated sludge to more than 2 inches.
したがって近年に至り、沈殿濃縮法に代わって加圧浮上
濃縮法、遠心濃縮法が注目され、その実施例も増えてい
る。しかしながら、加圧浮上濃縮法や遠心濃縮法は、所
要動力が大きく、装置も高価となるという無視し得ない
難点が存在する。Therefore, in recent years, instead of the precipitation concentration method, pressure flotation concentration method and centrifugal concentration method have attracted attention, and the number of examples thereof is increasing. However, the pressurized flotation concentration method and the centrifugal concentration method have disadvantages that cannot be ignored, such as the required power is large and the equipment is expensive.
このため、さらに合理的な濃縮法の技術的改善を行うこ
とは大きな意義がある。Therefore, it is of great significance to make technical improvements to more rational enrichment methods.
本発明は、有機性汚泥を合理的にスクリーン濃縮し、ス
クリーンの処理能力、ＳＳ回収率および濃縮度の向上を
はかろうとするものである。The present invention aims to rationally condense organic sludge with a screen and improve the throughput of the screen, the SS recovery rate, and the degree of concentration.
本発明は、故紙に水を加えてノ・イドロバルバーにて解
離し、該ノ・イドロバルバーから流出するスラリを有機
性汚泥に添加し、さらに高分子凝集剤を加えて凝集させ
たのち該凝集物をスクリーン分離することを特徴とする
ものである。In the present invention, water is added to waste paper and dissociated in a no-hydro valve, the slurry flowing out from the no-hydro valve is added to organic sludge, and a polymer flocculant is added to cause flocculation. It is characterized by screen separation.
本発明の一実施例を図面を参照しながら説明すれば、古
新聞、古雑誌などの故紙１と水２をハイドロパルパー３
に供給し、攪拌ロータ４によって強力に攪拌して、故紙
を解離しくほぐし）てドロドロのペーパースラリ５に変
換する。To explain one embodiment of the present invention with reference to the drawings, waste paper 1 such as old newspapers and old magazines and water 2 are collected in a hydropulper 3.
The paper slurry 5 is supplied to the waste paper and is strongly stirred by the stirring rotor 4 to dissociate and loosen the waste paper, thereby converting it into a mushy paper slurry 5.
ここに、ハイドロパルパー３とは、紙を水に懸濁させて
機械的な攪拌を与えて解離する装置の総称をいう。Here, the hydropulper 3 is a general term for devices that suspend paper in water and dissociate it by applying mechanical agitation.
次に、ペーパースラリ５を濃縮しようとする有機性汚泥
６に添加し、さらに高分子凝集剤（カチオンポリマが適
している）７を添加して、凝集混和槽８にて凝集フロッ
クを形成させる。このとき、形成される凝集フロックは
ベレット状できわめて強固であシ、ピンセットなどで容
易に摘まみあげることができる。この原因は、フロック
の構造が繊維分および故紙中の填料によって非常に強化
されるためと考えられる。これに対し、単に有機性汚泥
６を高分子凝集剤７のみで凝集させたフロックは、壊れ
やすく、ピンセットなどで摘まみあげることは困難であ
った。Next, the paper slurry 5 is added to the organic sludge 6 to be concentrated, and a polymer flocculant (suitably a cationic polymer) 7 is added to form flocs in a flocculation mixing tank 8. At this time, the agglomerated flocs formed are pellet-like and extremely strong, and can be easily picked up with tweezers or the like. This is thought to be due to the fact that the structure of the floc is greatly strengthened by the fibers and filler in the waste paper. On the other hand, flocs obtained by simply flocculating organic sludge 6 with polymer flocculant 7 were easily broken and difficult to pick up with tweezers or the like.
さらに、このようにして凝集フロックが形成された凝集
スラリ９を、スクリーン１０に供給して分離し、高度に
濃縮された濃縮スラッジ１１と分離水１２を得るが、ス
クリーン１０としては傾斜式ウェッジワイヤスクリーン
、ドラム型ロータリースクリーン（内部供給型又は外周
供給型）を使用することによって、凝集フロックにすペ
シ又はころがシ運動を与えながらスクリーン分離すれば
、得られる濃縮スラッジ１１の濃縮度はさらに向上する
。Furthermore, the flocculated slurry 9 in which flocs have been formed in this manner is supplied to a screen 10 for separation to obtain a highly concentrated concentrated sludge 11 and separated water 12. By using a screen or a drum-type rotary screen (internal supply type or outer circumferential supply type), the concentration of the obtained concentrated sludge 11 can be further improved by performing screen separation while applying a rolling motion to the flocs. do.
また、スクリーン１０の分離水１２は図示しない有機性
汚水処理工程へ返送されるが、その一部１２′をハイド
ロパルパー３にリサイクルし、故紙の解離用水として有
効利用するのが、水資源節約の上からも好都合であると
同時に、分離水１２中に含まれる残留ポリマを有機性汚
泥６の凝集に有効利用できるため、添加すべき高分子凝
集剤７の所要量が節約できるという重要利点がある。In addition, the separated water 12 of the screen 10 is returned to the organic wastewater treatment process (not shown), but a part of it 12' is recycled to the hydropulper 3 and effectively used as water for dissociating waste paper, in order to save water resources. In addition to being convenient from the above, there is an important advantage that the residual polymer contained in the separated water 12 can be effectively used for flocculating the organic sludge 6, so the required amount of the polymer flocculant 7 to be added can be saved. .
なお、加える水２としては何でもよいが、下水その他の
有機性汚水（汚泥スラリを含む）、その浄化処理水など
を使用して水資源の節約をはかるのも好ましい態様であ
る。Although any water may be used as the water 2 to be added, it is also preferable to use sewage, other organic wastewater (including sludge slurry), purified water, etc. to save water resources.
以上述べたような本発明方法によるときは、次のような
好結果を得られることが実験的に確認された。It has been experimentally confirmed that the following good results can be obtained using the method of the present invention as described above.
■ 有機性汚泥のみをスクリーンで分離濃縮する場合に
比べて、スクリーン分離水のＳＳが４０〜５０−減少し
、安定して固形物回収率を９５％以上にすることができ
た。(2) Compared to the case where only organic sludge is separated and concentrated using a screen, the SS of the screen-separated water was reduced by 40 to 50, and the solids recovery rate could be stably increased to 95% or more.
■ 有機性汚泥に高分子凝集剤のみを添加して凝集させ
る場合に比較して、スクリーン分離する □のに十分な
フロック形成を行うために必要な高分子凝集剤の注入率
が１０〜２０％減少した。■ Compared to the case where only a polymer flocculant is added to organic sludge to flocculate it, the injection rate of the polymer flocculant required to form sufficient flocs for screen separation is 10 to 20%. Diminished.
■ 有機性汚泥のみをスクリーンで分離濃縮する場合に
比べて、フロック強度、フロック粒径が増加し、スクリ
ーン面への付着性が減少するから、スクリーンの目開き
が大きくても、高いＳＳ回収率で濃縮率の高いスクリー
ン分離を行うことができた。この結果、スクリーンへの
通水流量負荷（ｎ／／ｒｒｌ・スクリーン面積・Ｈｒ）
が著しく増加した。すなわち、次表のような実験結果が
得られた。■ Compared to separating and concentrating only organic sludge using a screen, the floc strength and particle size increase, and the adhesion to the screen surface decreases, so even if the screen opening is large, the SS recovery rate is high. We were able to perform screen separation with a high concentration rate. As a result, the water flow rate load to the screen (n//rrl・screen area・Hr)
has increased significantly. That is, the experimental results shown in the following table were obtained.
■ 本発明による複合凝集体を単にスクリーン上に静置
して水切シを行うよシ、複合凝集体をスクリーン上です
べらせたり、ころがり運動を４えると、顕著な濃縮効果
が得られることが認められた。この原因は明らかでない
が、複合凝集体の強度が大きく、外力を作用させてもフ
ロックが破壊しないこと、さらにころがシなどの外力を
与えられたときにフロック内部の繊維分が水分の滲出を
促進するのでけないかと推定される。■ Instead of simply placing the composite aggregate according to the present invention on a screen and draining it, a remarkable concentration effect can be obtained by sliding the composite aggregate on the screen or rolling the composite aggregate on the screen. Admitted. The reason for this is not clear, but the strength of the composite aggregate is high, and the flocs do not break even when external forces are applied.Furthermore, the fibers inside the flocs prevent moisture from seeping out when external forces such as rollers are applied. It is presumed that this is because it promotes this.
なお、故紙をハイドロパルパー３によって解離すること
なく、単に細断したものでは、前記の諸結果を認めるこ
とができなかった。In addition, when the waste paper was simply shredded without being dissociated by the hydropulper 3, the above-mentioned results could not be observed.
さらに、本発明では故紙のスラリ５と有機性汚泥６の複
合凝集体を形成させてスクリーン分離するから、有機性
汚泥６を加圧浮上Ｓ縮法や遠心濃縮法などの所要動力の
大きな汚泥濃縮法を採用することなく、またバルキング
状態の余剰活性汚泥をも確実に高濃度に濃縮する仁とが
できる。Furthermore, in the present invention, a composite aggregate of the waste paper slurry 5 and the organic sludge 6 is formed and screen separated, so the organic sludge 6 can be concentrated by high-power sludge concentration such as the pressure flotation S-contraction method or the centrifugal concentration method. Even surplus activated sludge in a bulking state can be reliably concentrated to a high concentration without employing a method.
しかして、スクリーン１ｏにて高濃度に濃縮した濃縮ス
ラッジ１１を、スクリュープレス、フィルタプレスなど
の脱水機１３に供給し、含水率５０％台の ′自燃焼却
容易な脱水ケーキ１４と分離水１５が得られる。Then, the concentrated sludge 11 highly concentrated in the screen 1o is fed to a dehydrator 13 such as a screw press or filter press, and a dehydrated cake 14 with a water content of 50% and easy to self-combust and separated water 15 are produced. can get.
以上述べたように本発明によれば、次のようなきわめて
有益なる効果を得ることができる。As described above, according to the present invention, the following extremely beneficial effects can be obtained.
■ 余剰活性汚泥のような難濃縮性の汚泥に対しても、
小さな消費動力で、確実に高濃度に濃縮することができ
、またＳＳ回収率をあげることができる。■ Even for sludge that is difficult to thicken, such as surplus activated sludge,
With small power consumption, it is possible to reliably concentrate to a high concentration and increase the SS recovery rate.
■ 故紙の解離スラリと汚泥とが一体になった凝集複合
体を形成させるようにした結果、スクリーン分離性が単
なる汚泥の凝集フロックに比べ、著しく向上し、スクリ
ーンの処理能力も高めることができる。■ As a result of forming an agglomerated composite in which the dissociated slurry of waste paper and sludge are integrated, the screen separation property is significantly improved compared to a mere floc of sludge, and the processing capacity of the screen can also be increased.
■ 濃縮スラッジの脱水性も優れておシ、容易に５０チ
台の含水率の脱水ケーキが得られ、汚泥の焼却、コンポ
スト、埋立処分がきわめて合理化される。■ Concentrated sludge has excellent dewatering properties, and a dehydrated cake with a moisture content of 50 cm can be easily obtained, making sludge incineration, composting, and landfill disposal extremely streamlined.
図面は本発明の一実施例を示す系統説明図である。
１・・・故紙、２・・・水、３・・・ハイドロパルパー
、４・・・攪拌ロータ、５・・・ペーパースラリ、６・
・・有機性汚泥、７・・・高分子凝集剤、８・・・凝集
混和槽、９・・・凝集スラリ、１０・・・スクリーン、
１１・・・濃縮スラッジ、１２ 、１５・・・分離水、
１３・・・脱水機、１４・・、脱水ケーキ。
特許出願人 荏原インフィルコ株式会社代理人弁理士
高 木 正 行The drawing is a system explanatory diagram showing an embodiment of the present invention. 1... Waste paper, 2... Water, 3... Hydro pulper, 4... Stirring rotor, 5... Paper slurry, 6...
... Organic sludge, 7... Polymer flocculant, 8... Coagulation mixing tank, 9... Coagulation slurry, 10... Screen,
11... Concentrated sludge, 12, 15... Separated water,
13... Dehydrator, 14... Dehydrated cake. Patent applicant: Patent attorney representing Ebara Infilco Co., Ltd.
Masayuki Takagi
Claims (1)
該ハイドロパルパーから流出するスラリを有機性汚泥に
添加し、さらに高分子凝集剤を加えて凝集させたのち該
凝集物をスクリーン分離することを特徴とする有機性汚
泥の濃縮法。 ２、前記スクリーン分離を、前記凝集物にすベシ又はこ
ろがシ運動を与えながら行うものである特許請求の範囲
第１項記載の有機性汚泥の濃縮法。 ３、前記スクリーン分離で得られた分離水を前記ハイド
ロパルパーに供給するものである特許請求の範囲第１項
又は第２項記載の有機性汚泥の濃縮法。 ４、 前記ハイドロパルパーに加える水が有機性汚水又
はその浄化処理水である特許請求の範囲第１項又は第２
項記載の有機性汚泥の濃縮法。 ５ 前記有機性汚泥が余剰活性汚泥である特許請求の範
囲第１〜４項のいずれか一つの項記載の有機性汚泥の濃
縮法。[Claims] 1. Add water to waste paper and dissociate it with a hydrogen valve,
A method for concentrating organic sludge, which comprises adding slurry flowing out from the hydropulper to organic sludge, further adding a polymer flocculant to cause flocculation, and then separating the flocs with a screen. 2. The method for concentrating organic sludge as set forth in claim 1, wherein the screen separation is performed while applying a rolling motion to the aggregates. 3. The method for concentrating organic sludge according to claim 1 or 2, wherein the separated water obtained by the screen separation is supplied to the hydropulper. 4. Claim 1 or 2, wherein the water added to the hydropulper is organic wastewater or purified water thereof.
Method for concentrating organic sludge as described in section. 5. The method for concentrating organic sludge according to any one of claims 1 to 4, wherein the organic sludge is surplus activated sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59078690A JPS60222200A (en) | 1984-04-20 | 1984-04-20 | Thickening method of organic sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59078690A JPS60222200A (en) | 1984-04-20 | 1984-04-20 | Thickening method of organic sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60222200A true JPS60222200A (en) | 1985-11-06 |
Family
ID=13668862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59078690A Pending JPS60222200A (en) | 1984-04-20 | 1984-04-20 | Thickening method of organic sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60222200A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003095769A (en) * | 2001-09-20 | 2003-04-03 | Seihachiro Miura | Method of manufacturing compost fertilizer |
| JP2003238278A (en) * | 2002-02-12 | 2003-08-27 | Seihachiro Miura | Method of composting sewer sludge |
| JP2005246146A (en) * | 2004-03-01 | 2005-09-15 | Seihachiro Miura | Treatment method for fishery processing wastewater scum |
| JP2010000436A (en) * | 2008-06-19 | 2010-01-07 | Ebara Engineering Service Co Ltd | Method and apparatus for dehydrating organic sludge |
| KR20150032563A (en) | 2012-08-14 | 2015-03-26 | 미츠비시 쥬코 칸쿄 카가쿠 엔지니어링 가부시키가이샤 | Paper supply device, refining system and sludge-dewatering system |
| JP2016112545A (en) * | 2014-12-18 | 2016-06-23 | 王子ホールディングス株式会社 | Dehydration method for sludge and dehydration device for sludge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5035950A (en) * | 1973-08-02 | 1975-04-04 | ||
| JPS5613099A (en) * | 1979-07-10 | 1981-02-07 | Nichireki Chem Ind Co Ltd | Treating method of sludge |
| JPS57159598A (en) * | 1981-03-26 | 1982-10-01 | Ebara Infilco Co Ltd | Purification of organic waste water |
-
1984
- 1984-04-20 JP JP59078690A patent/JPS60222200A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5035950A (en) * | 1973-08-02 | 1975-04-04 | ||
| JPS5613099A (en) * | 1979-07-10 | 1981-02-07 | Nichireki Chem Ind Co Ltd | Treating method of sludge |
| JPS57159598A (en) * | 1981-03-26 | 1982-10-01 | Ebara Infilco Co Ltd | Purification of organic waste water |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003095769A (en) * | 2001-09-20 | 2003-04-03 | Seihachiro Miura | Method of manufacturing compost fertilizer |
| JP2003238278A (en) * | 2002-02-12 | 2003-08-27 | Seihachiro Miura | Method of composting sewer sludge |
| JP2005246146A (en) * | 2004-03-01 | 2005-09-15 | Seihachiro Miura | Treatment method for fishery processing wastewater scum |
| JP2010000436A (en) * | 2008-06-19 | 2010-01-07 | Ebara Engineering Service Co Ltd | Method and apparatus for dehydrating organic sludge |
| KR20150032563A (en) | 2012-08-14 | 2015-03-26 | 미츠비시 쥬코 칸쿄 카가쿠 엔지니어링 가부시키가이샤 | Paper supply device, refining system and sludge-dewatering system |
| JP2016112545A (en) * | 2014-12-18 | 2016-06-23 | 王子ホールディングス株式会社 | Dehydration method for sludge and dehydration device for sludge |
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