JPH07997A - Sludge treating device - Google Patents

Sludge treating device

Info

Publication number
JPH07997A
JPH07997A JP5143997A JP14399793A JPH07997A JP H07997 A JPH07997 A JP H07997A JP 5143997 A JP5143997 A JP 5143997A JP 14399793 A JP14399793 A JP 14399793A JP H07997 A JPH07997 A JP H07997A
Authority
JP
Japan
Prior art keywords
sludge
control
tank
vessel
amount
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
Application number
JP5143997A
Other languages
Japanese (ja)
Inventor
Yoshizumi Ogishima
美住 荻島
Saihei Yano
宰平 矢野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOKYO MET GOV GESUIDO SERVICE
TOKYO MET GOV GESUIDO SERVICE KK
Tomoe Engineering Co Ltd
Original Assignee
TOKYO MET GOV GESUIDO SERVICE
TOKYO MET GOV GESUIDO SERVICE KK
Tomoe Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TOKYO MET GOV GESUIDO SERVICE, TOKYO MET GOV GESUIDO SERVICE KK, Tomoe Engineering Co Ltd filed Critical TOKYO MET GOV GESUIDO SERVICE
Priority to JP5143997A priority Critical patent/JPH07997A/en
Publication of JPH07997A publication Critical patent/JPH07997A/en
Pending legal-status Critical Current

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  • Centrifugal Separators (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PURPOSE:To provide means for preventing the generation of malodors, reducing a treatment cost and to make easy operation control by executing a sludge treatment by automatic control with simple stages. CONSTITUTION:This method consists in preventing the leakage of the malodors by maintaining the internal pressures of a sludge receiving vessel 1, sludge dehydrating machine 4, separating liquid vessel 8, dehydrated cake vessel 7, etc., having easy hermetic constructions lower than the atm. pressure. This device is constituted to control the liquid level L1 of the sludge receiving vessel at a prescribed value by controlling a variable capacity pump 11 in such a manner that the supply rate of the centrifugal dehydrating machine 4 meets the sludge receiving rate to control a fluctuation in the amt. of the sludge (a) generated by saving of a concentrating vessel. The centrifugal dehydrating device for automatically controlling a differential velocity and the amt. of a flocculating agent to T1 and D1 is obtd.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、下水処理施設で発生し
た汚泥を脱水する汚泥処理装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge treatment device for dehydrating sludge generated in a sewage treatment facility.

【0002】[0002]

【従来の技術】既に提案されているこの種の汚泥処理方
法としては、例えば図3に示すような方法が一般に用い
られている。図3において従来法を説明すると、下水処
理施設で発生する汚泥を、濃度0.5〜1%の状態で汚
泥処理場の受泥槽(1)に送る。汚泥処理場では当該汚
泥を濃縮槽(2)で濃度2〜3%に濃縮した後、貯溜槽
(3)を経て、脱水機(4)で濃度20〜25%の脱水
ケーキ(c)と濃度0.1%以下の分離液(j)に分け
る。各槽で発生する臭気(g1〜g4)は、ブローアで吸
引して脱臭処理装置(5)に送る。脱水ケーキは焼却炉
(6)で焼却する。
2. Description of the Related Art As a sludge treatment method of this type already proposed, for example, the method shown in FIG. 3 is generally used. The conventional method will be described with reference to FIG. 3. Sludge generated in a sewage treatment facility is sent to a sludge receiving tank (1) of a sludge treatment plant in a concentration of 0.5 to 1%. At the sludge treatment plant, after concentrating the sludge to a concentration of 2 to 3% in the concentrating tank (2), the dewatering machine (4) passes through the storage tank (3) and the dewatering cake (c) having a concentration of 20 to 25%. Divide into separated liquid (j) of 0.1% or less. The odors (g 1 to g 4 ) generated in each tank are sucked by a blower and sent to the deodorizing device (5). The dehydrated cake is incinerated in the incinerator (6).

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上述し
た汚泥処理方法においては次の様な欠点があった。 1.槽類や脱水機から発生する臭気は吸引して脱臭して
いるが、槽類や脱水機が気密でないから、臭気の漏れが
あり、周辺環境を悪化させている。 2.開放した槽や脱水機を設置している建家全体から悪
臭を吸引しているから、脱臭する悪臭の量が膨大になリ
不経済である。 3.濃縮槽や貯溜槽で汚泥が長時間滞留するから、汚泥
の腐敗による性状変化が起こり、悪臭が発生し、また、
脱水工程では凝集剤添加率の増加や脱水ケーキの含水率
が上昇する現象が見られる。 4.槽類においては液位を高低で制御する回分制御、汚
泥の移送と供給は定流量運転であるため、受泥汚泥量の
変動には、脱水機の運転時間や運転基数を変えて対応し
ているから運転操作が複雑になる。 本発明はこの様な状況に鑑みてなされたものであって、
本発明の目的は、簡単な工程で、自動制御による汚泥処
理を行い、悪臭発生の防止、処理コストの低減、容易な
運転操作を図る手段を提供することである。
However, the above sludge treatment method has the following drawbacks. 1. The odor generated from the tanks and dehydrator is sucked and deodorized, but since the tanks and dehydrator are not airtight, there is odor leakage and the surrounding environment is deteriorated. 2. Since the bad odor is sucked from the whole building where the open tank and dehydrator are installed, the amount of bad odor to be deodorized is huge and uneconomical. 3. The sludge stays in the thickening tank and the storage tank for a long time, so the property changes due to the decay of the sludge, and a bad odor is generated.
In the dehydration process, phenomena such as an increase in the coagulant addition rate and an increase in the water content of the dehydrated cake are observed. 4. In tanks, the batch control that controls the liquid level at high and low levels, and the sludge transfer and supply are constant flow rate operations, so fluctuations in the amount of sludge received can be handled by changing the operating time and operating number of the dehydrator. Because of this, driving operation becomes complicated. The present invention has been made in view of such a situation,
An object of the present invention is to provide means for performing sludge treatment by automatic control in a simple process, preventing an offensive odor, reducing treatment cost, and facilitating operation.

【0004】[0004]

【課題を解決するための手段】本発明による汚泥処理工
程を図2に示す。図2は図3に代わる工程を示したもの
であり、発明の詳細は図1に示す。
FIG. 2 shows a sludge treatment process according to the present invention. FIG. 2 shows a step which is an alternative to FIG. 3, and the details of the invention are shown in FIG.

【0005】本発明による汚泥処理方法の手段は、槽類
容積の80%を占める大容量の濃縮槽(2)を省略する
ことによリ、気密構造が容易な受泥槽(1)、汚泥脱水
機(4)、分離液槽(8)、脱水ケーキ槽(7)等の内
部圧力を大気圧より低く保持し、悪臭の漏洩を防止する
方法と、濃縮槽を省略したことにより起こる汚泥(a)
の量の変動を、遠心脱水機(4)の供給量を受泥量に合
わせて可変容量ポンプ(11)を制御とすることによ
り、受泥槽の液位(L1)を所定値に制御する装置と
し、差速と凝集剤量を自動的に制御(T1およびD1)す
る遠心脱水装置を用いた簡潔で運転操作が容易に行える
汚泥処理方法を特徴とする。
The means of the sludge treatment method according to the present invention omits the large-capacity concentrating tank (2) which occupies 80% of the tank volume. The internal pressure of the dehydrator (4), the separated liquid tank (8), the dehydrated cake tank (7), etc. is kept lower than the atmospheric pressure to prevent the leakage of offensive odor, and the sludge caused by omitting the concentrating tank ( a)
The variable level pump (11) controls the liquid level (L 1 ) of the mud receiving tank to a predetermined value by adjusting the supply amount of the centrifugal dehydrator (4) according to the mud receiving amount. The sludge treatment method using a centrifugal dehydrator that automatically controls the differential speed and the amount of the flocculant (T 1 and D 1 ) is a simple and easy operation operation.

【0006】[0006]

【作用】つまりこの汚泥処理方法では、臭気が発生する
機器類を気密構造とし、当該機器類の内部圧力を大気圧
より低く保持することによリ、臭気の漏洩を防止する。
濃縮工程を省略し、滞留時間を短くすることで汚泥の腐
敗による難脱水化を防止し、脱水工程で使用する凝集剤
使用量の増加を防ぎ、脱水ケーキ含水率を低くできる。
回分制御を連続制御にすることにより、汚泥の脱水を自
動制御により行う方法を提供する。
In other words, in this sludge treatment method, the devices that generate odor have an airtight structure and the internal pressure of the devices is kept lower than the atmospheric pressure to prevent the leakage of odor.
By omitting the concentration step and shortening the residence time, it is possible to prevent difficult dehydration due to spoilage of sludge, prevent an increase in the amount of the flocculant used in the dehydration step, and reduce the water content of the dehydrated cake.
A method of automatically dehydrating sludge by providing batch control with continuous control is provided.

【0007】[0007]

【発明の効果】以上述ベたように本発明によれば、以下
の効果が期待できる。 1.臭気の発生源であった機器類を気密構造とし、内部
の圧力を大気圧より低く保っているから、悪臭の漏洩を
防止出来、周辺環境の改善が図れる。 2.脱臭が必要な機器類が気密構造となっているから、
内部の圧力を大気圧より低く保つ量だけ、吸引すれば良
いので、脱臭装置を極めて小さく出来る。 3.濃縮槽が不要となり、設置面積が60%程度削減で
きる。 4.汚泥の滞留時間が、従来法の1/10程度になり、
汚泥の腐敗による脱水ケーキ含水率の上昇が無いから、
焼却に必要な重油代が削減できる。 5.汚泥脱水機で最もランニングコストに影響を与える
高分子凝集剤の使用量を削減できるから、脱水工程の運
転経費を低減できる。 6.汚泥処理工程が、簡素化及び自動化されているか
ら、運転管理が容易である。
As described above, according to the present invention, the following effects can be expected. 1. The equipment that was the source of odor has an airtight structure, and the internal pressure is kept lower than atmospheric pressure, so it is possible to prevent leakage of odors and improve the surrounding environment. 2. Equipment that needs deodorization has an airtight structure,
The deodorizing device can be made extremely small because it is sufficient to suck the internal pressure below the atmospheric pressure. 3. No thickening tank is required, and the installation area can be reduced by about 60%. 4. The retention time of sludge becomes about 1/10 of the conventional method,
Since there is no increase in the water content of the dehydrated cake due to sludge decay,
The cost of heavy oil required for incineration can be reduced. 5. The operating amount of the dehydration process can be reduced because the amount of the polymer flocculant that most affects the running cost can be reduced in the sludge dehydrator. 6. The sludge treatment process is simplified and automated, so operation management is easy.

【0008】[0008]

【実施例】以下、本願の汚泥脱水装置を適応した処理方
法を図1に基づいて説明する。
EXAMPLE A processing method to which the sludge dewatering device of the present application is applied will be described below with reference to FIG.

【0009】下水処理施設で発生した濃度0.5〜1.
0%の汚泥(a)は受泥槽(1)に送られる。受泥槽
(1)は、槽内の液位を制御し上部に適当な圧力空間
(例えば槽容積の30%)を保持する為に用いる液位検
知器(L1)と、上部空間の圧力を大気圧より5〜50
hPa(適正値として5〜20hPa程度)低く保持す
る圧力制御装置(9)を装備している。圧力制御装置
(9)は受泥槽上部の空間圧力が所定値よリ低くなった
場舎は、配管(d)で空気(e)を所定値に達するまで
注入し、所定値より高くなった場合は、配管(d)から
内部のガス(g1)を排出し所定の圧力に保つ機構を有
する。排出した内部のガス(g1)は悪臭を含むから、
小型の脱臭機(5)で処理するか、焼却炉(6)で燃焼
する。
Concentrations generated in sewage treatment facilities 0.5-1.
0% of sludge (a) is sent to the sludge receiving tank (1). The mud receiving tank (1) is a liquid level detector (L 1 ) used to control the liquid level in the tank and maintain an appropriate pressure space (for example, 30% of the tank volume) in the upper part, and the pressure in the upper space. 5 to 50 from atmospheric pressure
It is equipped with a pressure control device (9) that keeps hPa low (about 5 to 20 hPa as an appropriate value). In the pressure control device (9), when the space pressure in the upper part of the mud receiving tank became lower than a predetermined value, air (e) was injected into the pipe (d) until it reached a predetermined value, and the air pressure became higher than the predetermined value. In this case, it has a mechanism for discharging the internal gas (g 1 ) from the pipe (d) and keeping it at a predetermined pressure. Since the discharged internal gas (g 1 ) contains a foul odor,
It is treated in a small deodorizer (5) or burned in an incinerator (6).

【0010】受泥槽(1)中の汚泥は槽内の液位を所定
値に(例えば槽容積の70%)保持するように、可変容
量の汚泥供給ポンプ(11)で遠心脱水機(4)に送ら
れる。受泥槽の滞留時間は、1時間程度で設計すると良
い。送泥側との槽容量のバランスによっては、緊急時に
送泥を一時貯留する予備槽(不図示)を設けても良い。
The sludge in the sludge receiving tank (1) is centrifugally dehydrated (4) by a variable capacity sludge supply pump (11) so as to keep the liquid level in the tank at a predetermined value (for example, 70% of the tank volume). ) Sent to. The retention time in the mud receiving tank should be designed to be about 1 hour. Depending on the balance of tank capacity with the mud sending side, a preliminary tank (not shown) may be provided to temporarily store mud during an emergency.

【0011】汚泥(a)は回転部が外筒(ケーシング)
を貫通する個所に外部の空気が流入しないようなシール
を装着した気密型遠心脱水機(4)で分離液(j1)と
脱水ケーキ(c1)に分けられる。汚泥の脱水に当たっ
ては凝集剤(h1)を添加する。
The rotating part of the sludge (a) is an outer cylinder (casing).
It is separated into a separated liquid (j 1 ) and a dehydrated cake (c 1 ) by an airtight centrifugal dehydrator (4) equipped with a seal so that the outside air does not flow into the portion penetrating the. A coagulant (h 1 ) is added for dehydration of sludge.

【0012】槽及び機器類の気密は水封やメカニカルシ
ール等の手段で目的を達成できる。
The airtightness of the tank and the equipment can be achieved by means such as water sealing or mechanical sealing.

【0013】分離液(j1)は、液位を制御し上部に適
当な圧力空間(例えば槽容積の30%)を保持する為に
用いる液位検知器(L3)と、上部空間の圧力を大気圧
より5〜50hPa(適正値として5〜20hPa程
度)低く保持する圧力制御装置(9′)を装備してい
る。
The separated liquid (j 1 ) is a liquid level detector (L 3 ) used for controlling the liquid level and holding an appropriate pressure space (for example, 30% of the tank volume) in the upper part, and the pressure in the upper space. Is equipped with a pressure control device (9 ') that keeps the pressure lower than the atmospheric pressure by 5 to 50 hPa (about 5 to 20 hPa as an appropriate value).

【0014】脱水ケーキ(c1)は、脱水ケーキ槽
(7)の上部空間の圧力を大気圧より低く保つために脱
水ケーキ槽排出口を脱水ケーキでシールする為に用いる
ケーキ位置検知器(L2)と、上部空間の圧力を分離液
槽と同圧力に保つ為の空気流通管(i)を装着してい
る。脱水ケーキ槽(7)中のケーキは、ケーキ位置検知
器(L2)で上部空間の圧力を保持する高さを保ちなが
らケーキ搬送機(10)で焼却炉(6)に搬送される。
ケーキ搬送機(10)は臭気の漏洩を防止するために、
密閉型のスクリユーコンベヤやケーキ移送ポンプを用い
る。
The dehydrated cake (c 1 ) is a cake position detector (L) used for sealing the outlet of the dehydrated cake tank with the dehydrated cake in order to keep the pressure in the upper space of the dehydrated cake tank (7) lower than atmospheric pressure. 2 ) and an air flow pipe (i) for keeping the pressure in the upper space at the same pressure as the separation liquid tank. The cake in the dehydrated cake tank (7) is transferred to the incinerator (6) by the cake transfer device (10) while maintaining the height for maintaining the pressure of the upper space by the cake position detector (L 2 ).
The cake carrier (10) is designed to prevent odor leakage.
A closed type screw conveyor or cake transfer pump is used.

【0015】本願の制御方法の詳細を、同じく図1に基
づいて説明する。
Details of the control method of the present application will be described with reference to FIG.

【0016】下水処理施設で発生した汚泥(a)は受泥
槽(1)に送られる。受泥槽(1)は、送られてくる汚
泥量に変動があった場合でも槽内の液位を所定の位置に
制御し、可変容量供給ポンプ(11)の流量を送られて
くる汚泥の量に等しく制御する液位検知器(L1)と流
量計(F1)からなる流量制御装置を備えている。
The sludge (a) generated in the sewage treatment facility is sent to the mud receiving tank (1). The sludge receiving tank (1) controls the liquid level in the tank to a predetermined position even when the amount of sludge sent in is changed, and the flow rate of the variable capacity supply pump (11) A flow rate control device including a liquid level detector (L 1 ) and a flow meter (F 1 ) that are controlled to be equal to the amount is provided.

【0017】流量制御の方法は、F1〜Fnの流量を同時
に調整する方法と、F1を所定流量の±50%の範囲で
液位制御のために変化させ、F2〜Fnを所定流量で固定
する方法がある。以下、より、安定した分離結果が期待
できる後者の制御方法について説明する。F1が所定流
量の±50%を越えなければ制御出来ないような流量変
動があった場合、F2、F3と順次液位制御を目的として
流量変化させる。この様に、複数の制御装置が液位保持
を目的として流量変化している場合は、最後発の制御装
置が液位を制御しており、他の流量制御装置は上限或い
は下限および所定流量に固定されている。
The flow rate control method includes a method of simultaneously adjusting the flow rates of F 1 to F n and a method of changing F 1 within the range of ± 50% of a predetermined flow rate to control the liquid level, and changing F 2 to F n . There is a method of fixing at a predetermined flow rate. The latter control method that can expect a more stable separation result will be described below. When there is a flow rate fluctuation that cannot be controlled unless F 1 exceeds ± 50% of the predetermined flow rate, the flow rate is changed for the purpose of liquid level control sequentially with F 2 and F 3 . In this way, when a plurality of control devices are changing the flow rate for the purpose of holding the liquid level, the last control device controls the liquid level, and the other flow control devices set the upper limit or the lower limit and the predetermined flow rate. It is fixed.

【0018】下水汚泥(a)を脱水し、脱水ケーキ
(c)と分離液(j)に分ける遠心脱水機(4)は、供
給汚泥量が所定流量に対して±50%変動しても、設定
した回転数に制御する回転数制御装置と、負荷量変動を
検知し、負荷量に比例した差速に自動で調整する差速制
御(例えばトルク制御)装置(T)が装備されている。
The centrifugal dehydrator (4) which dehydrates the sewage sludge (a) and separates it into the dehydrated cake (c) and the separated liquid (j) is A rotation speed control device that controls the rotation speed to a set speed and a differential speed control (for example, torque control) device (T) that detects a load variation and automatically adjusts to a differential speed proportional to the load amount are provided.

【0019】汚泥の脱水に当たって添加する凝集剤(h
1)の添加量は、遠心脱水機に供給する汚泥の量(F1
と質に比例させる必要があるから、遠心脱水機の分離液
(j1)の濃度もしくは凝集剤の過不足の少なくとも一
つを計測し、その変位量に比例して、凝集剤(h1)の
添加量を制御する装置(D1)が装備されている。
A coagulant (h
The addition amount of 1 ) is the amount of sludge supplied to the centrifugal dehydrator (F 1 )
Therefore, the concentration of the separated liquid (j 1 ) in the centrifugal dehydrator or at least one of the excess and deficiency of the coagulant is measured, and the coagulant (h 1 ) is proportional to the displacement amount. Is equipped with a device (D 1 ) for controlling the amount of addition of D.

【0020】下水汚泥のように、腐食性および付着性の
強い流体は、計測機のセンサー部の信頼性が十分でない
から、制御するに際し、各々の遠心脱水機に付属する制
御機器の計測値と制御量が全装置の平均値より予め定め
る管理限界を越えた時に警報を出し、制御量を平均値も
しくは管理限界値に制御する制御機能で異常制御を防ぐ
機構を付加すると良い。
A fluid such as sewage sludge, which is highly corrosive and adherent, does not have sufficient reliability in the sensor section of the measuring machine. Therefore, when controlling, the measured value of the control equipment attached to each centrifugal dehydrator should be It is advisable to add a mechanism to prevent abnormal control by issuing a warning when the control amount exceeds a predetermined control limit from the average value of all devices and controlling the control amount to the average value or the control limit value.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の汚泥処理装置の説明図。FIG. 1 is an explanatory view of a sludge treatment device of the present invention.

【図2】本発明の汚泥処理方法の工程図。FIG. 2 is a process diagram of a sludge treatment method of the present invention.

【図3】従来法の汚泥処理工程図。FIG. 3 is a conventional sludge treatment process diagram.

【符号の説明】[Explanation of symbols]

1…受泥槽 4…遠心脱水機 5…脱臭機 6…焼却炉 7…脱水ケーキ槽 8…分離液槽 9…圧力制御装置 10…汚泥移送機 11…可変容量供給ポンプ DESCRIPTION OF SYMBOLS 1 ... Mud receiving tank 4 ... Centrifugal dewatering machine 5 ... Deodorizing machine 6 ... Incinerator 7 ... Dewatering cake tank 8 ... Separation liquid tank 9 ... Pressure control device 10 ... Sludge transfer machine 11 ... Variable capacity supply pump

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 下水汚泥を処理する汚泥処理場におい
て、気密容器から成る受泥槽と、受泥槽の液位を所定範
囲に保つ為に汚泥の供給量を脱水機の規定処理量の±5
0%の範囲で調節する可変容量供給ポンプ、流量計測器
からなる複数基の汚泥供給設備と、供給された汚泥を分
離液と脱水ケーキに分離する気密型遠心脱水機と、該遠
心脱水機の各々にスクリユーコンベヤの回転数を制御す
る装置と、該遠心脱水機の分離液の濃度もしくは凝集剤
の過不足の少なくとも一つを計測し、その変位量から凝
集剤の注入量を制御する装置を具備した複数基の汚泥脱
水設備と、気密容器から成る分離液槽と、気密容器から
成る脱水ケーキ槽から構成される汚泥処理装置であっ
て、各気密機器の圧力を、大気圧より低く保つことを特
徴とする汚泥処理装置。
1. In a sludge treatment plant for treating sewage sludge, a sludge receiving tank consisting of an airtight container, and a sludge supply amount within a prescribed treating amount of a dehydrator in order to keep the liquid level of the sludge receiving tank within a predetermined range. 5
A plurality of sludge supply facilities consisting of a variable capacity supply pump and a flow rate meter, which are controlled in the range of 0%, an airtight centrifugal dehydrator for separating the supplied sludge into a separation liquid and a dehydrated cake, and a centrifugal dehydrator of the centrifugal dehydrator. A device for controlling the number of revolutions of the screw conveyor, and a device for measuring at least one of the concentration of the separated liquid of the centrifugal dehydrator or the excess or deficiency of the coagulant, and controlling the injection amount of the coagulant from the displacement amount. A sludge treatment device comprising a plurality of sludge dewatering facilities equipped with, a separation liquid tank consisting of an airtight container, and a dehydration cake tank consisting of an airtight container, wherein the pressure of each airtight device is kept lower than atmospheric pressure. A sludge treatment device characterized in that
JP5143997A 1993-06-15 1993-06-15 Sludge treating device Pending JPH07997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5143997A JPH07997A (en) 1993-06-15 1993-06-15 Sludge treating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5143997A JPH07997A (en) 1993-06-15 1993-06-15 Sludge treating device

Publications (1)

Publication Number Publication Date
JPH07997A true JPH07997A (en) 1995-01-06

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Application Number Title Priority Date Filing Date
JP5143997A Pending JPH07997A (en) 1993-06-15 1993-06-15 Sludge treating device

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Country Link
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08232598A (en) * 1996-01-12 1996-09-10 Tokai Rubber Ind Ltd Bedrock-solidification method
JP2009214088A (en) * 2008-03-13 2009-09-24 Metawater Co Ltd Sewage sludge treatment system
JP2009248038A (en) * 2008-04-09 2009-10-29 Mhi Environment Engineering Co Ltd Method and system for treating sludge
JP2010058045A (en) * 2008-09-03 2010-03-18 Daiwa House Industry Co Ltd Method and device for preventing offensive odor generation from storage tank for dewatered sludge cake
JP2012157860A (en) * 2012-03-26 2012-08-23 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co Ltd Sludge treatment method and sludge treatment system
JP2013013848A (en) * 2011-07-01 2013-01-24 Nishihara Environment Co Ltd Centrifugal dehydrator and centrifugal dehydration method using the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311169A (en) * 1976-07-19 1978-02-01 Nippon Kokan Kk <Nkk> Dehydrating and deodorizing method for heat treated sludge
JPS6054753A (en) * 1983-09-05 1985-03-29 Hitachi Ltd Turbidity controlling device of centrifugal dehydrator
JPH04171066A (en) * 1990-11-05 1992-06-18 Alfa Laval Ab Sludge dehydration control device of centrifugal separator of screw decanter type

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311169A (en) * 1976-07-19 1978-02-01 Nippon Kokan Kk <Nkk> Dehydrating and deodorizing method for heat treated sludge
JPS6054753A (en) * 1983-09-05 1985-03-29 Hitachi Ltd Turbidity controlling device of centrifugal dehydrator
JPH04171066A (en) * 1990-11-05 1992-06-18 Alfa Laval Ab Sludge dehydration control device of centrifugal separator of screw decanter type

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08232598A (en) * 1996-01-12 1996-09-10 Tokai Rubber Ind Ltd Bedrock-solidification method
JP2009214088A (en) * 2008-03-13 2009-09-24 Metawater Co Ltd Sewage sludge treatment system
JP2009248038A (en) * 2008-04-09 2009-10-29 Mhi Environment Engineering Co Ltd Method and system for treating sludge
JP2010058045A (en) * 2008-09-03 2010-03-18 Daiwa House Industry Co Ltd Method and device for preventing offensive odor generation from storage tank for dewatered sludge cake
JP2013013848A (en) * 2011-07-01 2013-01-24 Nishihara Environment Co Ltd Centrifugal dehydrator and centrifugal dehydration method using the same
JP2012157860A (en) * 2012-03-26 2012-08-23 Mitsubishi Heavy Industries Environmental & Chemical Engineering Co Ltd Sludge treatment method and sludge treatment system

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