JPH0337760Y2 - - Google Patents
Info
- Publication number
- JPH0337760Y2 JPH0337760Y2 JP6610984U JP6610984U JPH0337760Y2 JP H0337760 Y2 JPH0337760 Y2 JP H0337760Y2 JP 6610984 U JP6610984 U JP 6610984U JP 6610984 U JP6610984 U JP 6610984U JP H0337760 Y2 JPH0337760 Y2 JP H0337760Y2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- screen
- thickening
- tank
- floc
- 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
- 239000010802 sludge Substances 0.000 claims description 75
- 230000008719 thickening Effects 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000010893 paper waste Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 239000013055 pulp slurry Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010899 old newspaper Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、し尿、下水その他の有機性汚水の処
理に伴つて発生する有機性汚泥の合理的な濃縮脱
水装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rational concentration and dehydration device for organic sludge generated in the treatment of human waste, sewage, and other organic sewage.
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を処理、処分するに
は、まず脱水を行つて汚泥中の水分を低下させる
ことが不可欠である。ところが、このような有機
性汚泥はきわめて離脱水性であり、汚水の生物処
理工程で発生する余剰活性汚泥は特に離脱水性で
あることが知られている。
In order to treat and dispose of organic sludge generated from the treatment of organic sewage such as sewage, human waste, and various industrial wastewaters, it is essential to first reduce the water content in the sludge by dewatering it. However, such organic sludge is extremely water-eliminating, and it is known that surplus activated sludge generated in the biological treatment process of wastewater is particularly water-eliminating.
このような有機性汚泥の脱水に最も広く採用さ
れている方式は、初沈汚泥（最初沈澱池から排泥
される汚泥）と余剰活性汚泥とを混合した汚泥
（混合生汚泥という）にカチオンポリマなどの各
種脱水助剤が添加され、機械脱水されているが、
脱水ケーキの含水率はまだ高く、特に離脱水性の
汚泥の場合には脱水ケーキの含水率が80％台と高
いことが多い。したがつて、このような脱水ケー
キは、そのままでは処分が困難であるために、乾
燥、焼却される例が多いが、その乾燥、焼却に際
しては多量の有価燃料を必要とし、エネルギ節約
の立場からも大きな問題となつている。 The most widely used method for dewatering organic sludge is to add a cationic polymer to sludge (referred to as mixed raw sludge), which is a mixture of primary sludge (the sludge initially discharged from the settling tank) and surplus activated sludge. Various dehydration aids such as are added and mechanical dehydration is performed.
The moisture content of the dehydrated cake is still high, especially in the case of separated aqueous sludge, where the moisture content of the dehydrated cake is often as high as 80%. Therefore, such dehydrated cakes are difficult to dispose of as they are, so they are often dried and incinerated.However, drying and incineration require a large amount of valuable fuel, so it is not recommended to save energy. is also becoming a big problem.
また、脱水機としては各種のものが考案され、
使用されてはいるが、その脱水性能には限界があ
るところから、脱水の前処理として汚泥の改質も
行われている。すなわち、脱水前の汚泥を熱処
理、凍結融解処理などによつて脱水性を向上させ
る試みがされているが、これら従来法は何れも決
定的な方法とはいい難い。 In addition, various types of dehydrators have been devised,
Although it is used, its dewatering performance is limited, so sludge reformation is also performed as a pretreatment for dewatering. That is, attempts have been made to improve the dewaterability of sludge before dewatering by subjecting it to heat treatment, freeze-thaw treatment, etc., but none of these conventional methods can be said to be a definitive method.
本考案は、簡単な構成により、難脱水性の有機
性汚泥を、低処理コストできわめて合理的、効果
的に濃縮脱水する装置を提供しようとするもので
ある。
The present invention aims to provide a device that can condense and dewater difficult-to-dewater organic sludge very rationally and effectively at low processing cost with a simple configuration.
本考案は、余剰活性汚泥と繊維分の混合槽、該
混合槽にて得られた混合余剰活性汚泥に高分子凝
集剤を、注入混和するフロツク形成層、該フロツ
ク形成層で得られたフロツク形成汚泥を濃縮する
スクリーン濃縮設備、初沈汚泥の沈殿濃縮槽、該
沈殿濃縮槽及び前記スクリーン濃縮設備で得られ
た濃縮汚泥を同時に脱水する脱水機にて構成され
たことを特徴とする有機性汚泥の濃縮脱水装置で
ある。
The present invention consists of a mixing tank for excess activated sludge and fibers, a floc-forming layer for injecting and mixing a polymer flocculant into the mixed surplus activated sludge obtained in the mixing tank, and a floc-forming layer for forming flocs obtained in the floc-forming layer. An organic sludge comprising a screen thickening facility for concentrating sludge, a precipitation thickening tank for initial settling sludge, and a dewatering machine for simultaneously dewatering the thickened sludge obtained in the settling thickening tank and the screen thickening facility. This is a concentration dehydration equipment.
本考案の一実施例を図面を参照しながら説明す
ると、１は余剰活性汚泥２を導き、繊維分３を注
入する注入ポンプ４を備えた混合槽である。
An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a mixing tank equipped with an injection pump 4 for introducing surplus activated sludge 2 and injecting fiber component 3.
繊維分３としては種々のものがあるが、家庭、
事務所、工場などから排出される古新聞、古雑誌
その他の不要書類などの故紙を水の存在下にハイ
ドロパルパーにて撹拌し、故紙をパルプスラリ状
に解離したものや、処理施設に流入してくる有機
性汚水から回収された紙類、綿などを主体とする
し渣、あるいはこれら両者を併用使用すると経済
的でありかつ合理的である。 There are various types of fiber content 3, but household,
Waste paper such as old newspapers, old magazines, and other unnecessary documents discharged from offices, factories, etc. is stirred with a hydropulper in the presence of water, and the waste paper is dissociated into a pulp slurry, and the waste paper is dissociated into a pulp slurry. It is economical and rational to use paper recovered from organic sewage, sludge mainly made of cotton, or a combination of both.
５は、混合槽１で得られた混合余剰活性汚泥６
を導き、高分子凝集剤７を注入する注入ポンプ８
を備えたフロツク形成槽で、得られたフロツク形
成汚泥９はスクリーン濃縮設備１０に導かれて、
濃縮余剰活性汚泥１１とスクリーン分離水１２に
分離されるようになつている。スクリーン濃縮設
備１０としては、60゜傾斜ウエツジワイヤスクリ
ーンや回転円筒スクリーンなどが使用される。 5 is the mixed surplus activated sludge 6 obtained in the mixing tank 1
and an injection pump 8 for injecting the polymer flocculant 7.
The floc-forming sludge 9 obtained in the floc-forming tank is led to the screen concentration equipment 10,
The sludge is separated into concentrated surplus activated sludge 11 and screen separated water 12. As the screen concentration equipment 10, a 60° inclined wedge wire screen, a rotating cylindrical screen, or the like is used.
また、１３は、初沈汚泥１４を導入し、濃縮汚
泥１５と上澄水１６に分離する沈殿濃縮槽であ
り、その濃縮汚泥１５は脱水機１７に送られて脱
水され、前記スクリーン濃縮設備１０にて得られ
た濃縮余剰活性汚泥１１と共に脱水機１７にて脱
水されるが、この場合混合槽１８にて両者を混合
してから脱水機１７へ送給するのが好ましい。 Further, 13 is a sedimentation concentration tank that introduces the initial settling sludge 14 and separates it into thickened sludge 15 and supernatant water 16. The thickened sludge 15 is sent to a dewatering machine 17 to be dehydrated, and then sent to the screen thickening equipment 10. The activated sludge is dehydrated in a dehydrator 17 together with the concentrated surplus activated sludge 11 obtained in the above process, but in this case, it is preferable to mix the two in a mixing tank 18 and then feed the activated sludge to the dehydrator 17.
脱水機１７としては、各種の機械脱水機が使用
されるが、スクリユープレス、ベルトプレス、ロ
ールプレス、フイルタプレスなどの圧搾型脱水機
が効果的である。 Various mechanical dehydrators can be used as the dehydrator 17, and compression type dehydrators such as a screw press, belt press, roll press, and filter press are effective.
図中、１９は脱水分離水、２０は脱水ケーキを
示す。 In the figure, 19 indicates dehydrated separated water, and 20 indicates dehydrated cake.
次にその作用について述べれば、余剰活性汚泥
２は混合槽１へ導かれ、故紙をパルプスラリ状に
解離したものあるいはし渣その他の繊維分３を注
入ポンプ４にて注入して混合し、得られた混合余
剰活性汚泥６をフロツク形成層５に導いて注入ポ
ンプ８によつて高分子凝集剤７を注入混和してペ
レツト状のフロツクを形成させる。 Next, to explain its function, surplus activated sludge 2 is led to a mixing tank 1, and waste paper dissociated into pulp slurry or sludge or other fibers 3 are injected and mixed with an injection pump 4. The mixed surplus activated sludge 6 is introduced into the floc-forming layer 5, and a polymer flocculant 7 is injected and mixed with the injection pump 8 to form pellet-like flocs.
本考案者の実験によれば、余剰活性汚泥２のみ
に高分子凝集剤を添加する場合に比べて、繊維分
３が存在するときわめて良好なペレツト状フロツ
クが形成されることが確認された。この原因は、
繊維分３の存在がフロツクの強度を増加させるた
めに、圧密によつてもフロツクが破壊せず、良く
締つたフロツクが生成することによるのではない
かと考えられる。 According to experiments conducted by the inventor of the present invention, it has been confirmed that when the fiber component 3 is present, extremely good pellet-like flocs are formed compared to when a polymer flocculant is added only to the surplus activated sludge 2. The cause of this is
It is thought that this is because the presence of the fiber component 3 increases the strength of the floc, so that the floc does not break even during compaction and a well-tight floc is produced.
しかして、フロツク形成汚泥９はスクリーン濃
縮設備１０にフイードされるが、この繊維分３を
含有したフロツク形成汚泥９はスクリーン分離性
が非常にすぐれており、繊維分３を添加しない場
合に比べて汚泥濃度が増加し、スクリーン濃縮設
備１０にて瞬時に水切り濃縮され、固形物濃度５
％程度の濃縮余剰活性汚泥１１となり、スクリー
ンの処理能力が著しく向上する。例えば、繊維分
３を添加しない場合の目開き0.3mmのスクリーン
能力は10m3／Hr・ｍスクリーン幅であるのに対
し、故紙スラリを20％対SS添加したフロツク形
成汚泥では16m3／Hr・ｍスクリーン幅であつた。 Therefore, the floc-forming sludge 9 is fed to the screen thickening equipment 10, but this floc-forming sludge 9 containing the fiber component 3 has very good screen separation properties, compared to the case where the fiber component 3 is not added. The sludge concentration increases and is instantly drained and concentrated in the screen concentration equipment 10, resulting in a solid concentration of 5.
% of concentrated surplus activated sludge 11, and the processing capacity of the screen is significantly improved. For example, the screen capacity with a mesh size of 0.3 mm without adding 3 fibers is 10 m 3 /Hr・m screen width, whereas the screen width for floc-forming sludge with 20% waste paper slurry and SS added is 16 m 3 /Hr・m screen width.
一方、初沈汚泥１４は沈殿濃縮槽１３で沈殿濃
縮されて濃縮汚泥１５となるが、前記スクリーン
濃縮設備１０の分離水１２を沈殿濃縮槽１３に供
給すると、初沈汚泥１４の濃縮促進効果を期待す
ることができる。 On the other hand, the initial settling sludge 14 is precipitated and concentrated in the precipitation thickening tank 13 to become thickened sludge 15, but when the separated water 12 of the screen thickening equipment 10 is supplied to the settling thickening tank 13, the effect of promoting the concentration of the initial settling sludge 14 is enhanced. You can expect it.
このようにして得られた濃縮余剰活性汚泥１１
と初沈汚泥１４の濃縮汚泥１５は共に、あるいは
混合槽１８で混合されたのち、脱水機１７に供給
されるが、繊維分３を含む濃縮余剰活性汚泥１１
は初沈汚泥１４の濃縮汚泥１５の脱水助剤として
も有効利用され、含水率50％台の脱水ケーキ２０
が得られる。この脱水ケーキ２０は十分に自然可
能であり、また水分調整を行うことなくコンポス
ト化できる。 Concentrated surplus activated sludge 11 obtained in this way
The concentrated sludge 15 of the initial settling sludge 14 is supplied to the dehydrator 17 either together or after being mixed in the mixing tank 18.
It is also effectively used as a dehydration aid for the initial settling sludge 14 and the thickened sludge 15, resulting in a dewatered cake 20 with a water content of 50%.
is obtained. This dehydrated cake 20 is fully natural and can be composted without any moisture adjustment.
以上述べたように本考案によれば、次のような
有益なる諸効果を得ることができる。
As described above, according to the present invention, the following beneficial effects can be obtained.
初沈汚泥は高分子凝集剤を添加せず、高分子
凝集剤の注入は余剰活性汚泥に対してのみ行え
ばよいから、薬品のランニングコストは大幅に
節減される。 Since no polymer flocculant is added to the initial settling sludge, and the polymer flocculant only needs to be injected into the excess activated sludge, the running cost of chemicals can be significantly reduced.
余剰活性汚泥に対して、繊維分及び高分子凝
集剤を注入して改質してスクリーン濃縮するか
ら、難濃縮性の余剰活性汚泥でもきわめて容易
に濃縮することができ、しかもスクリーン濃縮
された繊維含有余剰活性汚泥を初沈汚泥の脱水
助剤として有効利用できる。 Surplus activated sludge is injected with fibers and a polymer flocculant to reform it and screen concentrate, so even surplus activated sludge that is difficult to thicken can be concentrated very easily. The excess activated sludge contained can be effectively used as a dewatering aid for initial settling sludge.
スクリーン分離性が良いので、スクリーン所
要面積を節減できる。 Since the screen separation property is good, the required screen area can be reduced.
消費動力の大きな遠心濃縮機、加圧浮上濃縮
機を使用して強制的に余剰活性汚泥を濃縮する
必要がないので、小動力で初沈汚泥、余剰活性
汚泥の両者を確実に４％以上に濃縮でき、汚泥
脱水工程の処理能力が向上する。 There is no need to forcibly thicken surplus activated sludge using a centrifugal thickener or pressurized flotation thickener that consumes a large amount of power, so both initial settled sludge and surplus activated sludge can be reliably reduced to 4% or more with a small amount of power. It can be concentrated, improving the processing capacity of the sludge dewatering process.
脱水ケーキの含水率を確実に50％台にできる
ので、脱水ケーキの乾燥、焼却、コンポスト
化、埋立などの各処理、処分工程がきわめて合
理化される。 Since the moisture content of the dehydrated cake can be reliably maintained in the 50% range, various processing and disposal processes such as drying, incineration, composting, and landfilling of the dehydrated cake can be extremely streamlined.
図面は本考案の一実施例を示す系統説明図であ
る。
１，１８……混合槽、２……余剰活性汚泥、３
……繊維分、４，８……注入ポンプ、５……フロ
ツク形成槽、６……混合余剰活性汚泥、７……高
分子凝集剤、９……フロツク形成汚泥、１０……
スクリーン濃縮設備、１１……濃縮余剰活性汚
泥、１２……スクリーン分離水、１３……沈殿濃
縮槽、１４……初沈汚泥、１５……濃縮汚泥、１
６……上澄水、１７……脱水機、１９……脱水分
離水、２０……脱水ケーキ。
The drawing is a system diagram showing an embodiment of the present invention. 1, 18... Mixing tank, 2... Excess activated sludge, 3
... Fiber content, 4, 8 ... Injection pump, 5 ... Floe formation tank, 6 ... Mixed excess activated sludge, 7 ... Polymer flocculant, 9 ... Floe formation sludge, 10 ...
Screen concentration equipment, 11... Concentrated surplus activated sludge, 12... Screen separated water, 13... Sedimentation concentration tank, 14... Initial settling sludge, 15... Thickened sludge, 1
6...Supernatant water, 17...Dehydrator, 19...Dehydrated separated water, 20...Dehydrated cake.
Claims (1)
て得られた混合余剰活性汚泥に高分子凝集剤を
注入混和するフロツク形成層、該フロツク形成
層で得られたフロツク形成汚泥を濃縮するスク
リーン濃縮設備、初沈汚泥の沈殿濃縮槽、該沈
殿濃縮槽及び前記スクリーン濃縮設備で得られ
た濃縮汚泥を同時に脱水する脱水機にて構成さ
れたことを特徴とする有機性汚泥の濃縮脱水装
置。 ２ 前記沈殿濃縮槽及び前記スクリーン濃縮設備
で得られた濃縮汚泥の混合槽を備えたものであ
る実用新案登録請求の範囲第１項記載の有機性
汚泥の濃縮脱水装置。 ３ 前記脱水機が圧搾脱水機である実用新案登録
請求の範囲第１項又は第２項記載の有機性汚泥
の濃縮脱水装置。[Scope of Claim for Utility Model Registration] 1. A mixing tank for surplus activated sludge and fiber components, a floc-forming layer in which a polymer flocculant is injected and mixed into the mixed surplus activated sludge obtained in the mixing tank, and The method is characterized by comprising a screen thickening facility for concentrating the floc-forming sludge, a precipitation thickening tank for the initial settling sludge, and a dewatering machine for simultaneously dewatering the thickened sludge obtained in the settling thickening tank and the screen thickening facility. A device for concentrating and dehydrating organic sludge. 2. The organic sludge concentration and dehydration apparatus according to claim 1, which is equipped with a mixing tank for the thickened sludge obtained by the precipitation thickening tank and the screen thickening equipment. 3. The organic sludge concentration and dehydration apparatus according to claim 1 or 2, wherein the dehydrator is a compression dehydrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6610984U JPS60179400U (en) | 1984-05-08 | 1984-05-08 | Organic sludge concentration and dehydration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6610984U JPS60179400U (en) | 1984-05-08 | 1984-05-08 | Organic sludge concentration and dehydration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60179400U JPS60179400U (en) | 1985-11-28 |
| JPH0337760Y2 true JPH0337760Y2 (en) | 1991-08-09 |
Family
ID=30598707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6610984U Granted JPS60179400U (en) | 1984-05-08 | 1984-05-08 | Organic sludge concentration and dehydration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60179400U (en) |
-
1984
- 1984-05-08 JP JP6610984U patent/JPS60179400U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60179400U (en) | 1985-11-28 |
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