JPS60187399A - Thermal treatment of sludge - Google Patents
Thermal treatment of sludgeInfo
- Publication number
- JPS60187399A JPS60187399A JP4217484A JP4217484A JPS60187399A JP S60187399 A JPS60187399 A JP S60187399A JP 4217484 A JP4217484 A JP 4217484A JP 4217484 A JP4217484 A JP 4217484A JP S60187399 A JPS60187399 A JP S60187399A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- heat
- treatment
- treated
- heat treatment
- 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
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、下水や廃水の処理によって発生した汚泥を調
質するための、汚泥の熱処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for heat treatment of sludge for refining sludge generated by treatment of sewage and wastewater.
一般に下水や廃水の処理によって発生した汚泥は、いっ
たん汚泥貯溜槽に貯溜した後、熱変換器で予熱して反応
器に供給し、反応器内に吹込んだ蒸気によって刀口温す
ると共に、反応器内に吹込んだ圧縮空気によって加圧し
、熱処理反応によって汚泥の沈降分離性および脱水性を
改善すると共に、悪臭成分をも酸化分解するようにして
いる。Generally, sludge generated from the treatment of sewage and wastewater is stored in a sludge storage tank, then preheated with a heat converter and supplied to a reactor. It is pressurized by compressed air blown into the tank, and a heat treatment reaction improves the settling and dewatering properties of the sludge, and also oxidizes and decomposes malodorous components.
ところが、反応温度が２００’Ｃ程度の高温熱処理を行
うと、汚泥から高濃度の有機物が溶出して液側に移行し
、これが熱処理分離液として排出されるため、その熱処
理分離液を活性汚泥法で処理しにくいという欠点があっ
た。そこで最近では、反応温度を下げて１６５℃程度の
低温熱処理を行い、熱処理分離液中の有機物濃度の低減
化を図ることも行われているが、熱処理分離液にはフミ
ン酸やフルボ酸類似物質等の難分解性物質が溶出成分と
して含まれている た高い色度を有し、これを活性汚泥
法で処理するには、ばつ気処理のために多量の吹込み空
気量を必要とし、処理コストが高くなるという欠点があ
った。However, when high-temperature heat treatment is performed at a reaction temperature of about 200'C, high-concentration organic matter is eluted from the sludge and transferred to the liquid side, which is discharged as heat-treated separated liquid. The disadvantage was that it was difficult to process. Therefore, recently, attempts have been made to lower the reaction temperature and perform low-temperature heat treatment at around 165°C in order to reduce the concentration of organic substances in the heat-treated separated liquid. It contains difficult-to-decompose substances such as eluted substances and has a high chromaticity.To treat this with the activated sludge method, a large amount of blown air is required for aeration treatment. The disadvantage was that the cost was high.
本発明は、上記従来の欠点に鑑みて提案されたもので、
予熱された汚泥が供給される反応器内に蒸気と圧縮空気
を吹込んで汚泥の調質を行うようにした汚泥の熱処理方
法において、汚泥の熱処理反応時に活性白土又はその類
似物質を添加すると共に、反応温度が１１０℃〜１６５
℃となるようにしたことを特徴とするものである。The present invention was proposed in view of the above-mentioned conventional drawbacks, and
In a sludge heat treatment method in which sludge is tempered by blowing steam and compressed air into a reactor to which preheated sludge is supplied, activated clay or a similar substance is added during the sludge heat treatment reaction, and Reaction temperature is 110℃~165℃
℃.
本発明の汚泥の熱処理方法によれば、汚泥から溶出した
難分解性物質を、汚泥の熱処理反応時に添加した活性白
土又はその類似物質に吸着させて汚泥と共に排出させる
ことができるから、熱処理分離液の色度を低下させるこ
とができる。According to the sludge heat treatment method of the present invention, the refractory substances eluted from the sludge can be adsorbed to activated clay or a similar substance added during the sludge heat treatment reaction, and can be discharged together with the sludge. chromaticity can be reduced.
また、熱処理分離液を単独で処理し、水処理系に返送す
るに際し、単独で活性汚泥処理をするとき、ばつ気処理
のために必要とする吹込み空気量を著しく低減すること
ができるから、処理コストを大巾に削減することができ
、また水処理系への返送負荷を低減できる等多くの利点
が生じ、下水や廃水の処理によって発生した汚泥を調質
する上で、きわめて有効である。In addition, when the heat-treated separated liquid is treated alone and returned to the water treatment system, the amount of blown air required for aeration treatment can be significantly reduced when activated sludge treatment is performed alone. It has many advantages such as significantly reducing treatment costs and reducing the return load to the water treatment system, and is extremely effective in refining sludge generated from sewage and wastewater treatment. .
以下、本発明の実施例を図面を参照して具体的に説明す
る。Embodiments of the present invention will be specifically described below with reference to the drawings.
図面は本発明の汚泥の熱処理方法の１実施例を示す工程
図である。The drawings are process diagrams showing one embodiment of the sludge heat treatment method of the present invention.
図中１は汚泥貯溜槽で、下水や廃水の処理によって発生
した汚泥２は、いったん汚泥貯溜槽１に貯溜された後、
ポンプ３により熱交換器４に供給され、ここで予熱され
た後反応器５の下部に供給され反応器５に供給された汚
泥２は、・反応器５の下部に吹込まれている蒸気６によ
って１６５℃程度まで加温されるとともに、反応器５の
下部に吹込まれている１０Ｋｑ／ｃｒＡ程度の圧縮突気
７によって加圧され、反応器５内で低温熱処理されるが
、反応器５内には別に活性白土又はその類似物質８が供
給され、汚泥２の熱処理反応時に添加されるようになっ
ている。反応器５から排出される排ガス９は、図示しな
いスクラバーに導かれて除湿冷却された後、脱臭塔へ送
られて脱臭処理されることになる。反応器５で低温熱処
理された汚泥２は熱交換器４に導かれて熱回収され、常
温まで冷却されて濃縮槽１１に送られる。濃縮槽１１に
おいて沈降分離された汚泥２は、フィルタープレス１２
により脱水処理され、また、濃縮槽１１において汚泥２
と分離された熱処理分離液１０は、図示しない循環式長
時間ばつ気処理槽において活性汚泥処理され、その後水
処理系に返送される。In the figure, 1 is a sludge storage tank, and sludge 2 generated from the treatment of sewage and wastewater is once stored in the sludge storage tank 1.
The sludge 2 is supplied to the heat exchanger 4 by the pump 3, preheated there, and then supplied to the lower part of the reactor 5. The sludge 2 is It is heated to about 165°C and pressurized by compressed air 7 of about 10 Kq/crA blown into the lower part of the reactor 5, and is subjected to low-temperature heat treatment in the reactor 5. Activated clay or a similar substance 8 is separately supplied and added during the heat treatment reaction of the sludge 2. The exhaust gas 9 discharged from the reactor 5 is guided to a scrubber (not shown), dehumidified and cooled, and then sent to a deodorizing tower where it is deodorized. The sludge 2 subjected to low-temperature heat treatment in the reactor 5 is led to a heat exchanger 4 where heat is recovered, cooled to room temperature, and sent to a thickening tank 11. The sludge 2 sedimented and separated in the thickening tank 11 is passed through the filter press 12.
The sludge 2 is dehydrated in the thickening tank 11.
The heat-treated separated liquid 10 is subjected to activated sludge treatment in a circulation type long-time aeration treatment tank (not shown), and then returned to the water treatment system.
上記工程よりなる本発明の汚泥の熱処理方法においては
、汚泥は低温熱処理されるので、汚泥から高濃度の有機
物の溶出は最小限に軽減される。また、汚泥から溶出し
たフミン酸やフルボ酸類似物質等の難分解性物質は、汚
泥の熱処理反応時に添加される活性白土又はその類似物
質に吸着されるから、熱処理分離液の色度を低下させる
ことができる。そして、熱処理分離液には難分解性物質
が低減されているので、熱処理分離液をばつ気処理する
ために必要とする吹込み突気量を著しく低減することが
でき、活性汚泥の処理コストを大巾に削減することがで
きる。In the sludge heat treatment method of the present invention comprising the above steps, the sludge is subjected to low-temperature heat treatment, so that the elution of high-concentration organic matter from the sludge is minimized. In addition, persistent substances such as humic acid and fulvic acid-like substances eluted from the sludge are adsorbed by activated clay or similar substances added during the heat treatment reaction of the sludge, reducing the chromaticity of the heat-treated separated liquid. be able to. In addition, since the heat-treated separated liquid contains less refractory substances, the amount of blown air required to aerate the heat-treated separated liquid can be significantly reduced, reducing activated sludge treatment costs. It can be reduced to a large extent.
次に、上記工程よりなる本発明の汚泥の熱処理方法の有
効性を確認するために、汚泥の熱処理反応時に活性白土
を添加しない場合と、添加ｒ Ｐ ）
した場合における熱処理分離液の性状と、その熱処理分
離液を循環式長時間ばつ気処理した処理水の性状を分析
したところ、次表に示すような分析結果を得ることがで
きる。Next, in order to confirm the effectiveness of the sludge heat treatment method of the present invention comprising the above steps, we will examine the properties of the heat-treated separated liquid when activated clay is not added during the sludge heat treatment reaction and when activated clay is added, When the properties of the treated water obtained by subjecting the heat-treated separated liquid to long-term circulation treatment were analyzed, the analysis results shown in the following table were obtained.
表−■は活性白土を添加しないで汚泥を反応温度１６５
℃程度で従来の熱処理をしたｍＡの・熱処理分離液と、
その熱処理分離液を循環式長時間ばつ気処理した処理水
の分析値を示し、ばつ気処理に要した吹込み空気量は、
熱処理分離液１ゴ当り略３２ＯＮｍ’であった。Table - ■ shows the reaction temperature of sludge at 165 without adding activated clay.
A heat-treated separated liquid of mA that has been conventionally heat-treated at about ℃,
The analysis value of the treated water obtained by circulating the heat-treated separated liquid for a long time is shown, and the amount of blown air required for the aeration treatment is as follows:
It was approximately 32 ONm' per heat-treated separated liquid.
表−■
（従来・・・・・・活性白土無垢７１１１ ）（６）
表−■は活性白土を１０チ（重量）添加して汚泥を反応
ＷＡ度１６５℃程度で本発明の方法により熱処理した場
合の熱処理分離液と、その熱処理分離液を循環式長時間
ばつ気処理した処理水の分析値を示し、ばつ気処理に要
した吹込み空気量は、熱処理分離液１ｄ当り略９６Ｎｄ
であった。Table -■ (Conventional...Activated clay pure 7111) (6) Table -■ shows that 10 inches (by weight) of activated clay was added and the sludge was heat-treated by the method of the present invention at a reaction WA degree of about 165°C. The analytical values of the heat-treated separated liquid and the treated water obtained by circulating the heat-treated separated liquid for a long time are shown.
Met.
表−■
Ｃ本発明・・・・・・活性白土１０チ（重量）添加）こ
の分析値から明らかなように、汚泥の熱処理反応時に活
性白土を添加すると、活性白土を添加しない場合と比較
して熱処理分離液のＳＳ（７）
やＢＯＤ 、 ＣＯＤＭｎ、 Ｔ Ｎ （トータル窒素
）。Table - ■C Invention: Addition of 10 g of activated clay SS (7), BOD, CODMn, and TN (total nitrogen) of the heat-treated separated liquid.
Ｔ−ＰＣトータルリン）の濃度及び色度はいずれも大巾
に低減しており、熱処理によって汚泥から溶出した難分
解性物質等が活性白土に効果的に吸着して除去されたこ
とが解る。Both the concentration and chromaticity of T-PC (total phosphorus) were significantly reduced, indicating that the refractory substances eluted from the sludge by the heat treatment were effectively adsorbed to the activated clay and removed.
このように、本発明の汚泥の熱処理方法によれば、熱処
理分離液には難分解性物質が低減されているので、熱処
理分離液をばつ気処理するに要する吹込み空気量は従来
の約１／３となり、。As described above, according to the sludge heat treatment method of the present invention, the amount of refractory substances in the heat-treated separated liquid is reduced, so the amount of blown air required to atomize the heat-treated separated liquid is approximately 1 /3.
活性汚泥の処理コストを大巾に削減することができるこ
とになる。This means that the cost of processing activated sludge can be significantly reduced.
なお、本発明の方法によって熱処理された汚泥の脱水性
は、比抵抗で１０７〜１０８（５１５−２／ｆ ）のオ
ーダーにあり、反応温度が１１０℃〜１６５℃の範囲内
であれば、汚泥の熱処理反応時に活性白土又はその類似
物質を添加する効果が十分にあることが解った。又添加
する活性白土又はその類似物質の量は、熱処理する汚泥
に対し、５〜１０％（重量）程度の小量で十分であった
１゜以上説明したように、本発明によれば、汚泥（８）
を熱処理してできる熱処理分離液を活性汚泥法で容易に
処理することができ、その処理コストを大巾に削減する
ことができる等大きな利点を有し、下水や廃水の処理に
よって発生した汚泥を調質する上できわめて有効な汚泥
の熱処理方法を提供し得るものである。The dewaterability of the sludge heat-treated by the method of the present invention is on the order of 107 to 108 (515-2/f) in terms of specific resistance, and if the reaction temperature is within the range of 110°C to 165°C, the sludge It was found that the addition of activated clay or a similar substance during the heat treatment reaction is sufficiently effective. In addition, the amount of activated clay or similar substances to be added is sufficient to be as small as 5 to 10% (by weight) of the sludge to be heat treated.As explained above, according to the present invention, sludge (8) The heat-treated separated liquid produced by heat-treating water can be easily treated using the activated sludge method, which has great advantages such as the ability to drastically reduce the treatment cost. The present invention provides a method for heat treatment of sludge that is extremely effective in refining sludge.
図面は本発明の汚泥の熱処理方法の１実施例を示す工程
図である。
１・・・・・・汚泥貯溜槽 ２・・・・・・汚泥３・・
・・・・ポンプ ４・・・・・・熱交換器５・・・・・
・反応器 ６・・・・・・蒸気７・・・・・・圧縮空気
８・・・・・・活性白土又はその類似物質９・・・・・
・排ガス １０・・・熱処理分離液１１・・・濃縮槽
１２・・・フィルタープレス特許出願人 久保田鉄工株
式会社The drawings are process diagrams showing one embodiment of the sludge heat treatment method of the present invention. 1...Sludge storage tank 2...Sludge 3...
... Pump 4 ... Heat exchanger 5 ...
・Reactor 6... Steam 7... Compressed air 8... Activated clay or similar substance 9...
・Exhaust gas 10...Heat-treated separated liquid 11...Concentration tank
12... Filter press patent applicant Kubota Iron Works Co., Ltd.
Claims (1)
を吹込んで汚泥の調質を行うようにした汚泥の熱処理方
法において、汚泥の熱処理反応時に、活性白土又はその
類似物質を添加すると共に、反応温度が１１０℃〜１６
５℃となるようにしたことを特徴とする汚泥の熱処理方
法。In a sludge heat treatment method in which sludge is tempered by blowing steam and compressed air into a reactor into which preheated sludge is supplied, activated clay or a similar substance is added during the sludge heat treatment reaction. , reaction temperature is 110℃~16
A method for heat treatment of sludge, characterized in that the temperature is 5°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4217484A JPS60187399A (en) | 1984-03-07 | 1984-03-07 | Thermal treatment of sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4217484A JPS60187399A (en) | 1984-03-07 | 1984-03-07 | Thermal treatment of sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60187399A true JPS60187399A (en) | 1985-09-24 |
| JPH0148836B2 JPH0148836B2 (en) | 1989-10-20 |
Family
ID=12628608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4217484A Granted JPS60187399A (en) | 1984-03-07 | 1984-03-07 | Thermal treatment of sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60187399A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100767810B1 (en) | 2007-06-15 | 2007-10-18 | 주식회사 나노엔텍 | Sludge treatment method |
| CN104003593A (en) * | 2014-06-14 | 2014-08-27 | 济南米铎碳新能源科技有限公司 | Sludge harmless treatment method |
| CN111774009A (en) * | 2020-07-14 | 2020-10-16 | 西安交通大学 | Hydrothermal dehydration treatment reaction device for high-water-content organic matter and operation method thereof |
-
1984
- 1984-03-07 JP JP4217484A patent/JPS60187399A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100767810B1 (en) | 2007-06-15 | 2007-10-18 | 주식회사 나노엔텍 | Sludge treatment method |
| CN104003593A (en) * | 2014-06-14 | 2014-08-27 | 济南米铎碳新能源科技有限公司 | Sludge harmless treatment method |
| CN104003593B (en) * | 2014-06-14 | 2016-05-04 | 济南米铎碳新能源科技有限公司 | Sludge harmless treatment method |
| CN111774009A (en) * | 2020-07-14 | 2020-10-16 | 西安交通大学 | Hydrothermal dehydration treatment reaction device for high-water-content organic matter and operation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0148836B2 (en) | 1989-10-20 |
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