JPH02261598A - Method for purifying sludge in pond, moat, or the like - Google Patents
Method for purifying sludge in pond, moat, or the likeInfo
- Publication number
- JPH02261598A JPH02261598A JP1082021A JP8202189A JPH02261598A JP H02261598 A JPH02261598 A JP H02261598A JP 1082021 A JP1082021 A JP 1082021A JP 8202189 A JP8202189 A JP 8202189A JP H02261598 A JPH02261598 A JP H02261598A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- water
- pond
- moat
- tank
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 230000018044 dehydration Effects 0.000 claims abstract description 14
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 14
- 238000004062 sedimentation Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims description 12
- 230000003472 neutralizing effect Effects 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000002351 wastewater Substances 0.000 claims description 9
- 238000005345 coagulation Methods 0.000 claims description 8
- 230000015271 coagulation Effects 0.000 claims description 8
- 239000006228 supernatant Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000003311 flocculating effect Effects 0.000 claims 1
- 208000005156 Dehydration Diseases 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 abstract 1
- 230000016615 flocculation Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 229920006317 cationic polymer Polymers 0.000 description 8
- 241000251468 Actinopterygii Species 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Landscapes
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野〕
本発明は所定量の水が貯留される池や堀、あるいは比較
的小なる川において、池底等の沈積されるヘドロを効果
的に浄化後の水を再び返還可能としたヘドロの浄化方法
に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention can effectively purify sludge deposited on the bottom of a pond, moat, or relatively small river where a predetermined amount of water is stored. This relates to a sludge purification method that allows the water to be returned again.
湖沼、河川、池、城の堀、その他の堀や貯水池等には常
に所要量の水が貯留されるようになっている。この堀や
池には雨水の他に汚水等や落葉、土砂9 ごみ等その他
の不純物が流入し、2等流入不純物が池底、堀底に堆積
あるいは堆積腐敗してヘドロとなり、これが池、堀の貯
留水の水質を汚濁させている。The required amount of water is always stored in lakes, rivers, ponds, castle moats, and other moats and reservoirs. In addition to rainwater, other impurities such as sewage, fallen leaves, and dirt flow into these moats and ponds.The secondary inflow impurities accumulate or rot on the pond and moat bottoms, becoming sludge, which forms sludge in the ponds and moats. It pollutes the quality of stored water.
このヘドロを除去する方法としては池、堀の水を揚水し
て排出し、池等を干上がらせ、底部に沈降堆積している
ヘドロ等を機械的・物質的に除去する方法あるいはこの
水をサンドポンプ等でヘドロと共に揚水し、この揚水に
凝集剤を投入混合して分離し、固形物を除去した後、上
澄水を池、堀等に再び戻す浚渫法とがある。Methods for removing this sludge include pumping and draining water from ponds and moats, drying the pond, and mechanically or physically removing the sludge that has settled and accumulated at the bottom; There is a dredging method in which water is pumped up together with sludge using a sand pump or the like, a flocculant is mixed into the pumped water to separate it, solids are removed, and the supernatant water is returned to a pond, moat, etc.
(発明が解決しようとする課題〕
池等を干上がらせて機械的に沈降堆積したヘドロを除去
する方法では、−旦池や堀の水を抜く、すなわち完全に
排水させ、天日等にである程度乾燥させた後、ブルドー
ザ等により排出するので、池等の排水に手数がかかり、
またヘドロ除去作業時、池や堀としての機能が一時停止
すると共に、景観を損ねるものとなる。(Problem to be solved by the invention) In the method of drying a pond, etc. and mechanically removing the settled and accumulated sludge, - Drain the water from the pond or moat, that is, completely drain it, and expose it to sunlight etc. After drying to some extent, it is discharged using a bulldozer, etc., which takes time and effort to drain ponds, etc.
Additionally, during sludge removal work, the function of ponds and moats will be temporarily suspended, and the landscape will be spoiled.
また浚渫法においては、ポンプアップしたヘドロ水に凝
集剤を投入撹拌混和してヘドロの固形物を除去している
。このヘドロ固形物を脱水した排水中には前凝集剤が未
だ残留している。In the dredging method, a flocculant is added to pumped-up sludge water and stirred to remove solid matter from the sludge. The pre-flocculant still remains in the waste water from which the sludge solids have been dehydrated.
カチオンポリマーの急性魚毒性を示すTLs (半数
生存限界濃度)は0.2〜s pp−である。The TLs (half survival limit concentration) indicating acute fish toxicity of cationic polymers is 0.2 to spp-.
脱水排水中には11−1Opp程度のカチオンポリマー
が存在するため、この脱水後の排水をそのまま元の池や
堀に戻すと、この凝集剤の毒性よりして魚等の水生動物
を死滅させるものとなる。Since there is a cationic polymer of about 11-1 Opp in dehydrated wastewater, if this dehydrated wastewater is returned to its original pond or moat, it will kill aquatic animals such as fish due to the toxicity of this coagulant. becomes.
二のためこの排水屋に適した中和剤を混合し、中和させ
た後、池等に戻している。このためヘドロ処理量に応じ
て使用される凝集剤の使用量が増すと共に中和剤使用量
も増す欠点がある。After mixing with a neutralizing agent suitable for this drainage house and neutralizing it, the water is returned to the pond, etc. Therefore, there is a drawback that the amount of flocculant used increases depending on the amount of sludge treated, and the amount of neutralizing agent used also increases.
本発明はこの中和剤使用量を極力抑制し、かつ所望のヘ
ドロ浄化を行なうことを目的とする。The object of the present invention is to suppress the amount of neutralizing agent used as much as possible and to perform desired sludge purification.
池、堀等の水を底部に沈降堆積したヘドロと一緒に揚水
し、これを沈降分離してその上澄水を再び池、堀等に戻
すと共に、沈降分離した固形物質に凝集剤を混合撹拌し
て凝集させた後、これを脱水工程で脱水して汚泥として
排出し、この脱水工程での排水を沈降分離工程へ返還投
入させる。Water from ponds, moats, etc. is pumped up together with the sludge that has settled and accumulated at the bottom, and this is separated by sedimentation, and the supernatant water is returned to the pond, moat, etc., and a flocculant is mixed and stirred into the solid substances that have settled and separated. After coagulation, this is dehydrated in a dehydration process and discharged as sludge, and the waste water from this dehydration process is returned to the sedimentation separation process.
以下本発明ヘドロの浄化方法を図面に示す実施例にもと
づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The sludge purification method of the present invention will be explained below based on embodiments shown in the drawings.
湖沼、河川、池、城の堀、貯水池等の堀や池1よりポン
プ2にて底部に沈降堆積されたヘドロと共にポンプアッ
プして揚水する。このヘドロ等の揚水は揚水管3を経て
、この揚水中のヘドロ固形分と上澄水とを分離するため
、凝集濃縮タンク4へ導く、この場合、使用されるポン
プ2は第1図に示すように油上に設置し、このポンプ2
に接続された浚渫管5をフロート6等にて支持させ、水
面変化に追従させ、この浚渫管5の先端が所定深度に達
し、底部に沈降堆積したヘドロを浚渫できるようになす
か、あるいは第2図に示すように池、堀の水中に浚渫ポ
ンプを投入して直接ヘドロを吸い上げるようになす。そ
の他の方法も採用可能である。A pump 2 pumps up water from a moat or pond 1 such as a lake, river, pond, castle moat, or reservoir together with the sludge that has settled and accumulated at the bottom. This pumped water such as sludge is led to a coagulation concentration tank 4 through a pumping pipe 3 to separate the sludge solid content and supernatant water in this pumped water. In this case, the pump 2 used is as shown in Fig. 1. This pump 2 is installed above the oil.
The dredging pipe 5 connected to the dredging pipe 5 is supported by a float 6 or the like to follow changes in the water level, and when the tip of the dredging pipe 5 reaches a predetermined depth, it is possible to dredge the sludge that has settled and accumulated at the bottom. As shown in Figure 2, a dredging pump is placed into the water in the pond or moat to directly suck up the sludge. Other methods are also possible.
前記凝集濃縮タンク4は一つでもよいが、図示のように
一次タンク41と二次タンク42とし、この−次タンク
41内で揚排水されたヘドロ水を沈降分離させる。この
ヘドロ分の沈降分離はその重量差を利用して自然分離沈
降させることを目的とするが、この−次タンク41には
揚排水のヘドロ水と共に後述する脱水工程で得た脱離水
を供給する。このようにすることによりこの脱離中に含
有される比較的濃度の低い凝集剤はヘドロと結合し一層
濃度が低くなり、他方凝集剤の作用によりヘドロ分の凝
集沈降が促進される。Although there may be only one coagulation concentration tank 4, as shown in the figure, a primary tank 41 and a secondary tank 42 are used, and the sludge water pumped and discharged in the secondary tank 41 is sedimented and separated. The purpose of the sedimentation and separation of this sludge is to naturally separate and settle by utilizing the difference in weight, but this secondary tank 41 is supplied with desorbed water obtained in the dehydration process described later, along with sludge water from the pumped water. . By doing so, the relatively low concentration flocculant contained during this desorption combines with the sludge, resulting in an even lower concentration, and on the other hand, the action of the flocculant promotes coagulation and sedimentation of the sludge.
この−次タンク41でヘドロ固形分を分離した上澄水は
返戻管7を経て、池または堀へ返送される。この時、脱
水工程で得た脱離中に含有される濃度の低い凝集剤成分
は、この−次タンク内に新たに供給されるヘドロ水のヘ
ドロ分と結合して、その1度はさらに低下し、無害化さ
れる。The supernatant water from which the sludge solid content has been separated in the secondary tank 41 is returned to the pond or moat via the return pipe 7. At this time, the low concentration flocculant component contained in the desorption obtained in the dehydration process combines with the sludge component of the sludge water newly supplied into this next tank, and the degree of sludge content further decreases. and rendered harmless.
一次タンク41にて濃縮されたヘドロ分はポンプ8と供
給管9を経て二次タンク42へ供給される。この二次タ
ンク42内には凝集剤10例えばカチオンポリマーをヘ
ドロ分量に応じて投入してこれを混合撹拌し、このヘド
ロ分を凝集させ、脱水可能な固形状とする。カチオンボ
ッマーの投入と混合撹拌はラインミキサーなと他の手段
により行なうことも可能である0次いでこの二次タンク
42より管11を経て脱水工程12へ移送する。この脱
水工程12では多量の水分を含んだヘドロ固形分を投棄
又は埋立等が行える程度に脱水し、ヘドロ分はここで確
実に所要含水率まで低下された固形体となる。この脱水
工程で使用される脱水装置としては本願出願人が既に特
許を取得した特公昭60−89、同62−54048号
公報に開示された固定型あるいは移動型のベルトプレス
式脱水機、加圧式脱水機、遠心分離機等の採用が可能で
あり、この機種は限定されるものではない。The sludge concentrated in the primary tank 41 is supplied to the secondary tank 42 via the pump 8 and the supply pipe 9. A flocculant 10, such as a cationic polymer, is put into the secondary tank 42 in accordance with the amount of sludge and mixed and stirred to coagulate the sludge into a solid form that can be dehydrated. The addition of the cation bomber and mixing and agitation can also be carried out by a line mixer or other means.Then, the cation bomber is transferred from the secondary tank 42 via the pipe 11 to the dehydration step 12. In this dehydration step 12, the sludge solid content containing a large amount of water is dehydrated to the extent that it can be dumped or landfilled, and the sludge content becomes a solid body whose moisture content is reliably reduced to the required moisture content. The dewatering equipment used in this dewatering process includes a fixed or mobile belt press type dehydrator disclosed in Japanese Patent Publications No. 60-89 and No. 62-54048, for which the applicant has already obtained a patent, and a pressurized type dehydrator. It is possible to employ a dehydrator, a centrifugal separator, etc., and this model is not limited.
この脱水工程で脱水したヘドロ固形分はトラック又はコ
ンベア等で搬出して投棄又は埋立てられるが、この脱水
により得られた脱離水は濾液受槽13にて一旦受水し、
これをポンプ14と返還水管15を経て一次タンク41
へ供給する。脱離水中のカチオンポリマーは一次タンク
内に供給されるヘドロ水と結合し、ヘドロの凝集に寄与
するので脱離水中のカチオンポリマーの濃度は一層低下
する。The sludge solid content dehydrated in this dehydration process is carried out by truck or conveyor and dumped or landfilled, but the desorbed water obtained by this dehydration is once received in the filtrate receiving tank 13.
This is passed through the pump 14 and the return water pipe 15 to the primary tank 41.
supply to The cationic polymer in the desorbed water combines with the sludge water supplied into the primary tank and contributes to the coagulation of the sludge, thereby further reducing the concentration of the cationic polymer in the desorbed water.
第3図は上記実施例に基づき浚渫したヘドロ5t/Hを
浄化した際のマスバランスを示すものである0図におい
てカチオンポリマーは固形物に対して平均0.15%添
加した。脱離水には平均1〜3ppmの残留カチオンポ
リマーが検出れた。Figure 3 shows the mass balance when 5 tons/hour of dredged sludge was purified based on the above example. In Figure 0, the cationic polymer was added in an average of 0.15% to the solid matter. An average of 1 to 3 ppm of residual cationic polymer was detected in the desorbed water.
実際には沈降分離汚泥の含水率が78〜85%と変動し
たのにもかかわらず、凝集剤の添加量を一定にしたため
、脱離水中のカチオンポリマー濃度は最高20ppm+
まで増加したが、ヘドロに混合した後の上澄水中からは
検出されなかった。Although the water content of the settled sludge actually fluctuated between 78% and 85%, the amount of flocculant added was kept constant, so the cationic polymer concentration in the desorbed water was at a maximum of 20ppm+.
However, it was not detected in the supernatant water after mixing with the sludge.
また脱水工程で得られる脱離水は第1図に示す実施例で
は、すべて−次タンク41へ返還しているが、この脱離
水の濃度、量が一次タンクへ返還する許容量あるいは許
容値以上の場合、−次タンク内で新たに供給されるヘド
ロ水を凝集するために含有凝集剤成分を利用しても未だ
反応しない凝集剤成分が上澄水に混入されて池等への返
還水となって池に放流される危険がある。これを防ぐた
め、第2図に示す実施例では返還水管15の一部に返還
水中に残存する凝集剤濃度及びその返還水量を検出する
センサー16とこの検出値をもって中和剤の添加供給量
を調整する中和剤供給制御機構17を介して返還水管1
5に配設されたパルプ18を制御し、−次タンク内への
返送量を調整する。またこのバルブ18には中和槽19
に配管される返還水管20を設け、r液受槽からの金利
脱離水を一次タンクへ供給しないで、中和槽19へ供給
し、ここで中和剤21例えばアニオンポリマーを適量添
加し、中和させた後、池等へ戻すようになす。In addition, in the embodiment shown in Fig. 1, all of the desorbed water obtained in the dehydration process is returned to the secondary tank 41, but the concentration and amount of this desorbed water is greater than the allowable amount to be returned to the primary tank or the allowable value. In this case, even if the contained flocculant components are used to flocculate newly supplied sludge water in the next tank, the unreacted flocculant components are mixed into the supernatant water and returned to the pond, etc. There is a risk of water being discharged into the pond. In order to prevent this, in the embodiment shown in FIG. 2, a sensor 16 is installed in a part of the return water pipe 15 to detect the concentration of flocculant remaining in the returned water and the amount of returned water. Return water pipe 1 via adjusting neutralizing agent supply control mechanism 17
The pulp 18 disposed in the tank 5 is controlled to adjust the amount returned to the next tank. This valve 18 also has a neutralization tank 19.
A return water pipe 20 is installed, and the desorbed water from the r-liquid receiving tank is not supplied to the primary tank, but is supplied to the neutralization tank 19, where an appropriate amount of a neutralizing agent 21, for example, an anionic polymer is added and neutralized. After that, the fish should be returned to the pond, etc.
さらに、−次タンク41に隣接設置したオーバーフロー
槽22にも、中和剤21を添付系統を設け、上澄水中に
#集剤成分が残っていた場合、緊急措置としての中和が
可能となるようになす。Furthermore, a system for attaching the neutralizing agent 21 is also installed in the overflow tank 22 installed adjacent to the secondary tank 41, so that if #collecting agent components remain in the supernatant water, neutralization can be performed as an emergency measure. Do it like this.
本発明による時は、脱水工程で得た脱離水を池、@より
1!排水したヘドロ分を含む汚水と混合しているので脱
離水中に残存する濃度の低い凝集剤成分はこの一次タン
ク内のヘドロ水とにより凝固反応を起こして無害化され
ると共に、ヘドロ水の沈降分離が促進される。According to the present invention, the desorbed water obtained in the dehydration process is transferred from the pond to @1! Since it is mixed with wastewater containing drained sludge, the low concentration flocculant components remaining in the desorbed water undergo a coagulation reaction with the sludge water in the primary tank and become harmless, and the sludge water settles. Separation is facilitated.
また請求項2記載の発明によれば脱水工程で得られる脱
離水の要領及び残存凝集剤成分の濃度を検出し、−次タ
ンクへ供給される脱離水はヘドロ水と結合し、除去可能
な量にとどめ、これを越える返還水には中和剤を添加す
るようにしているため、池へ返還される水の無害化は一
層確実なものとなり、水生動物に影響を与えることがな
°く、かつFi離水の量、凝集剤の濃度等に関係なく連
続的に処理できる。According to the second aspect of the invention, the amount of desorbed water obtained in the dehydration step and the concentration of the remaining flocculant component are detected, and the desorbed water supplied to the next tank is combined with sludge water and the amount that can be removed is Since the water returned to the pond exceeds this limit, a neutralizing agent is added to it, making it even more certain that the water returned to the pond is harmless and will not have any impact on aquatic animals. Moreover, continuous treatment is possible regardless of the amount of Fi water syneresis, the concentration of the flocculant, etc.
lは池又は堀、2. 8. 14はポンプ、4は凝集濃
縮タンク、41は一次タンク、42は二次タンク、7は
返戻管、9は供給管、 10は凝集剤、12は脱水工程
、15は返還水管、16はセンサー 21は中和剤。l is a pond or a moat; 2. 8. 14 is a pump, 4 is a coagulation concentration tank, 41 is a primary tank, 42 is a secondary tank, 7 is a return pipe, 9 is a supply pipe, 10 is a flocculant, 12 is a dewatering process, 15 is a return water pipe, 16 is a sensor 21 is a neutralizing agent.
Claims (2)
に揚水し、これを沈降分離してその上澄水を再び池、堀
等に戻すと共に、沈降分離した固形物質に凝集剤を混合
撹拌して凝集させた後、これを脱水工程で脱水して汚泥
として排出し、この脱水工程での排水を沈降分離工程へ
返還投入させることを特徴とする池、堀等のヘドロの浄
化方法。(1) Water from a pond, moat, etc. is pumped up together with the sludge that has settled and accumulated at the bottom, and this is separated by sedimentation, and the supernatant water is returned to the pond, moat, etc., and a flocculant is applied to the solid substances that have settled and separated. A method for purifying sludge in ponds, moats, etc., characterized by mixing and agitating and flocculating it, dewatering it in a dehydration process and discharging it as sludge, and returning the wastewater from this dehydration process to a sedimentation separation process. .
留濃度及び排水量を検出し、沈降分離工程に返還投入す
る量を適正に制御し、脱水工程の排水余剰量にこれに適
した中和剤を投入中和させた後、再び池、堀に反戻させ
る請求項1記載の池、堀等のヘドロの浄化方法。(2) Detect the coagulation residue concentration and amount of wastewater input in the previous process of the wastewater obtained in the dewatering process, appropriately control the amount returned to the sedimentation separation process, and adjust the surplus wastewater from the dewatering process to an appropriate amount. 2. The method for purifying sludge in ponds, moats, etc. according to claim 1, wherein after neutralizing by adding a neutralizing agent, the sludge is returned to the pond or moat.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1082021A JPH02261598A (en) | 1989-03-31 | 1989-03-31 | Method for purifying sludge in pond, moat, or the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1082021A JPH02261598A (en) | 1989-03-31 | 1989-03-31 | Method for purifying sludge in pond, moat, or the like |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02261598A true JPH02261598A (en) | 1990-10-24 |
JPH0546280B2 JPH0546280B2 (en) | 1993-07-13 |
Family
ID=13762871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1082021A Granted JPH02261598A (en) | 1989-03-31 | 1989-03-31 | Method for purifying sludge in pond, moat, or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02261598A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2492403A3 (en) * | 2011-02-22 | 2012-11-14 | Purgotec OY | Method and apparatus for purging sludge from the bottom of a water area |
JP2015117988A (en) * | 2013-12-18 | 2015-06-25 | 株式会社カミバヤシ | Decontamination treatment method for radioactive materials |
JP2018143907A (en) * | 2017-03-01 | 2018-09-20 | 学校法人福岡大学 | Water quality improvement method and shellfish growth promotion method |
CN109208669A (en) * | 2018-10-27 | 2019-01-15 | 河北雄安德荫源环境科技有限公司 | A kind of sewage disposal system and processing method of swag |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5291550A (en) * | 1976-01-27 | 1977-08-02 | Kubota Ltd | Method for sludge treatment |
-
1989
- 1989-03-31 JP JP1082021A patent/JPH02261598A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5291550A (en) * | 1976-01-27 | 1977-08-02 | Kubota Ltd | Method for sludge treatment |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2492403A3 (en) * | 2011-02-22 | 2012-11-14 | Purgotec OY | Method and apparatus for purging sludge from the bottom of a water area |
JP2015117988A (en) * | 2013-12-18 | 2015-06-25 | 株式会社カミバヤシ | Decontamination treatment method for radioactive materials |
JP2018143907A (en) * | 2017-03-01 | 2018-09-20 | 学校法人福岡大学 | Water quality improvement method and shellfish growth promotion method |
CN109208669A (en) * | 2018-10-27 | 2019-01-15 | 河北雄安德荫源环境科技有限公司 | A kind of sewage disposal system and processing method of swag |
CN109208669B (en) * | 2018-10-27 | 2023-09-26 | 河北雄安德荫源环境科技有限公司 | Sewage treatment system and treatment method for pit |
Also Published As
Publication number | Publication date |
---|---|
JPH0546280B2 (en) | 1993-07-13 |
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