JPH07246396A - Treatment of dredging slurry - Google Patents
Treatment of dredging slurryInfo
- Publication number
- JPH07246396A JPH07246396A JP3945894A JP3945894A JPH07246396A JP H07246396 A JPH07246396 A JP H07246396A JP 3945894 A JP3945894 A JP 3945894A JP 3945894 A JP3945894 A JP 3945894A JP H07246396 A JPH07246396 A JP H07246396A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- water
- fly ash
- dredging
- water content
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は浚渫スラリーの処理方法
に係り、特に、固形分に対する含水率が１００重量％以
上の高含水率浚渫スラリーを、低コストに、かつ、効率
的に団粒化処理する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a dredging slurry, and particularly to agglomerating a high water content dredging slurry having a water content of 100% by weight or more with respect to solid content at low cost and efficiently. Regarding how to handle.
【０００２】[0002]
【従来の技術】浚渫工事では浚渫スラリーが大量に発生
するが、発生した浚渫スラリーは、廃棄する場合であっ
ても埋戻す場合であっても、ある程度固形化する必要が
ある。2. Description of the Related Art A large amount of dredging slurry is generated in a dredging work, but the dredging slurry thus generated needs to be solidified to some extent, whether it is discarded or backfilled.
【０００３】ところで、従来、粘土系スラリーの産業廃
土や建設廃土は、その含水率（本明細書において、含水
率とは固形分重量に対する水分重量の割合をさす。）に
応じて固化方法が異なり、含水率４０％以下の比較的低
含水率のものは、生石灰（ＣａＯ）を添加して水分調整
及びポゾラン反応による固化処理がなされている。ま
た、含水率４０〜１００％のものは、セメント、或い
は、セメントと高分子吸収材及び／又は生石灰とを添加
することにより固化処理がなされている。By the way, conventionally, the industrial waste soil and construction waste soil of clay-based slurry are solidified according to their water content (in this specification, the water content means the ratio of the weight of water to the weight of solid content). In contrast, water content of 40% or less and a relatively low water content are subjected to water adjustment by adding quick lime (CaO) and solidification treatment by a pozzolan reaction. Further, those having a water content of 40 to 100% have been solidified by adding cement, or cement and a polymer absorbent and / or quick lime.
【０００４】しかしながら、含水率１００％以上の高含
水率スラリーは、上述のような方法では、固化材を多く
添加する必要があり、処理コストが高騰することから、
長期間天日乾燥して含水率を低下させた後処理している
のが現状である。However, in the high water content slurry having a water content of 100% or more, it is necessary to add a large amount of the solidifying material in the above-mentioned method, and the treatment cost rises.
The present situation is that after sun-drying for a long period of time to reduce the water content, post-treatment is performed.
【０００５】浚渫工事で発生する浚渫スラリーもまた、
含水率１００％以上の高含水率スラリーであることか
ら、固化処理には長期間の天日乾燥を必要とする。The dredging slurry generated in the dredging work is also
Since it is a high water content slurry having a water content of 100% or more, solidification requires long-term sun drying.
【０００６】[0006]
【発明が解決しようとする課題】上述の如く、浚渫スラ
リーは高含水率スラリーであるため、浚渫スラリーの固
化処理には次のような問題がある。As described above, since the dredging slurry has a high water content, the solidification treatment of the dredging slurry has the following problems.
【０００７】即ち、生石灰等の固化材の使用量の増大を
防いでコストの高騰を避けるためには、長期間天日乾燥
する必要があり、この場合には、処理に要する期間が長
くなる、天日乾燥のためのスペースを確保する必要があ
るなどの問題がある。That is, in order to prevent an increase in the amount of the solidifying material such as quick lime used and to avoid a cost increase, it is necessary to dry in the sun for a long time. In this case, the period required for the treatment becomes long. There are problems such as the need to secure space for sun drying.
【０００８】一方、天日乾燥を行わず、処理効率を高め
ようとすると、固化材を多量に添加する必要があり、処
理コストの高騰を招く。On the other hand, if it is attempted to improve the treatment efficiency without performing the sun drying, it is necessary to add a large amount of the solidifying material, which causes a rise in the treatment cost.
【０００９】本発明は上記従来の問題点を解決し、含水
率１００％以上の高含水率浚渫スラリーを、低コスト
に、かつ効率的に固化処理する方法を提供することを目
的とする。An object of the present invention is to solve the above conventional problems and to provide a method for efficiently solidifying a dredged slurry having a high water content of 100% or more at a low cost.
【００１０】[0010]
【課題を解決するための手段】請求項１の浚渫スラリー
の処理方法は、固形分に対する含水率が１００重量％以
上の浚渫スラリーを団粒化処理する方法であって、該浚
渫スラリーにフライアッシュと水溶性高分子吸収材とを
添加することを特徴とする。A method of treating a dredged slurry according to claim 1 is a method of agglomerating a dredged slurry having a water content of 100% by weight or more based on a solid content, wherein fly ash is applied to the dredged slurry. And a water-soluble polymer absorbent are added.
【００１１】請求項２の浚渫スラリーの処理方法は、固
形分に対する含水率が１００重量％以上の浚渫スラリー
を団粒化処理する方法であって、該浚渫スラリーにフラ
イアッシュと、水溶性高分子吸収材と、セメント及び／
又は生石灰とを添加することを特徴とする。The method for treating the dredging slurry according to claim 2 is a method for agglomerating the dredging slurry having a water content of 100% by weight or more with respect to the solid content, wherein the dredging slurry comprises fly ash and a water-soluble polymer. Absorbent, cement and /
Alternatively, quicklime is added.
【００１２】即ち、水溶性高分子吸収材は、浚渫スラリ
ー中の水を吸収してゲル化するため、浚渫スラリーの固
化に有効であるが、高含水率スラリーに対しては、多量
添加を必要とし、コスト高騰の原因となる。That is, since the water-soluble polymer absorbent absorbs water in the dredging slurry and gels, it is effective in solidifying the dredging slurry, but it is necessary to add a large amount to the high water content slurry. And, it causes the cost increase.
【００１３】本発明者は、高含水率浚渫スラリーへの水
溶性高分子吸収材添加量の低減について検討した結果、
浚渫スラリーにフライアッシュを添加して体積当りの含
水量を低減させることにより、水溶性高分子吸収材添加
量の低減が図れることを見出し、本発明を完成させた。The present inventor has examined the reduction of the amount of the water-soluble polymer absorbent added to the high water content dredging slurry.
The inventors have found that the addition amount of a water-soluble polymer absorbent can be reduced by adding fly ash to the dredging slurry to reduce the water content per volume, and have completed the present invention.
【００１４】以下に本発明を詳細に説明する。The present invention will be described in detail below.
【００１５】本発明の方法においては、含水率１００％
以上の高含水率浚渫スラリーにフライアッシュ及び水溶
性高分子吸収材、或いは更にセメント及び／又は生石灰
を添加する。In the method of the present invention, the water content is 100%.
Fly ash and a water-soluble polymer absorbent, or further cement and / or quick lime is added to the above high water content dredging slurry.
【００１６】本発明において、フライアッシュは、フラ
イアッシュ添加混合後の浚渫スラリーの含水率が１００
％以下、好ましくは４０〜１００％程度となるように添
加するのが好ましく、その添加量は処理する浚渫スラリ
ーの含水率に応じて適宜決定されるが、通常の場合、各
添加材の好適添加量は次の通りである。In the present invention, the fly ash has a water content of 100 in the dredging slurry after the fly ash is added and mixed.
% Or less, preferably about 40 to 100%, and the addition amount is appropriately determined according to the water content of the dredging slurry to be treated, but in the usual case, suitable addition of each additive is preferable. The quantities are as follows:
【００１７】浚渫スラリーにフライアッシュ及び水溶性
高分子吸収材を添加する場合、その添加量は、浚渫スラ
リーに対してフライアッシュを１６０〜２０重量％、水
溶性高分子吸収材を１３〜０．０５重量％とするのが好
ましい。When the fly ash and the water-soluble polymer absorbent are added to the dredging slurry, the amount of the fly ash added is 160 to 20% by weight of the fly ash and the water-soluble polymer absorbent is 13 to 0. It is preferably set to 05% by weight.
【００１８】また、浚渫スラリーにフライアッシュと水
溶性高分子吸収材とセメント又は生石灰とを添加する場
合には、浚渫スラリーに対してフライアッシュを１６０
〜２０重量％、水溶性高分子吸収材を３〜０．０５重量
％、セメントを１５重量％以下、特に８〜４重量％又は
生石灰を１５重量％以下、特に８〜４重量％添加するの
が好ましい。セメントと生石灰をともに添加する場合に
は、セメントを浚渫スラリーに対して１３重量％以下、
特に５〜１．５重量％、生石灰を１３重量％以下、特に
５〜１．５重量％とし、セメントと生石灰の合計の添加
量は浚渫スラリーに対して１５重量％以下、特に８〜
３．５重量％となるようにするのが好ましい。When fly ash, a water-soluble polymer absorbent and cement or quicklime are added to the dredging slurry, 160 ash of fly ash is added to the dredging slurry.
-20% by weight, water-soluble polymer absorbent 3 to 0.05% by weight, cement 15% by weight or less, especially 8-4% by weight or quick lime 15% by weight or less, especially 8-4% by weight. Is preferred. When both cement and quicklime are added, the cement is added in an amount of 13% by weight or less based on the dredging slurry,
In particular, 5 to 1.5% by weight, quick lime 13% by weight or less, particularly 5 to 1.5% by weight, the total addition amount of cement and quicklime is 15% by weight or less, especially 8 to 8% with respect to the dredging slurry.
It is preferably set to 3.5% by weight.
【００１９】本発明において、浚渫スラリーへのフライ
アッシュの添加量が上記範囲より少ないとフライアッシ
ュを添加したことによる水溶性高分子吸収材やセメン
ト、生石灰の必要添加量の低減効果が十分に得られず、
多いと所定の強度に団粒化することが困難となる場合が
ある。水溶性高分子吸収材の割合が上記範囲より少ない
と十分に団粒化することができず、また、多いと水溶性
高分子吸収材の添加コストが高くつき好ましくない。In the present invention, if the amount of fly ash added to the dredging slurry is less than the above range, the effect of reducing the required amount of the water-soluble polymer absorbent, cement, and quick lime by adding fly ash is sufficiently obtained. Not be
If it is too large, it may be difficult to aggregate into a predetermined strength. If the proportion of the water-soluble polymer absorbent is less than the above range, it cannot be sufficiently aggregated, and if it is too large, the addition cost of the water-soluble polymer absorbent is high, which is not preferable.
【００２０】セメント及び／又は生石灰は団粒化強度の
増大のために添加するため、必要とされる強度に応じて
決定されるが、上記範囲より多く添加しても、強度の大
幅な向上は認められず、コストの高騰を招き、好ましく
ない。Cement and / or quick lime is added for the purpose of increasing the aggregated strength, so it is determined according to the required strength. However, adding more than the above range does not significantly improve the strength. It is not preferable because it is not recognized and the cost rises.
【００２１】各添加材の添加割合は、上記範囲におい
て、浚渫スラリーの含水率の程度や団粒化後の処理方法
（廃棄するか、或いは埋立て等に再利用するか）等に応
じて適宜決定するのが好ましい。The addition ratio of each additive is appropriately determined within the above range depending on the degree of water content of the dredging slurry and the treatment method after agglomeration (whether it is discarded or reused for landfill, etc.). It is preferable to determine.
【００２２】本発明の浚渫スラリーの処理方法におい
て、各添加材の添加順序には特に制限はなく、全添加材
を一度に同時添加することもできるが、好ましくは、次
の〜のいずれかの手順で行うのが望ましいが、下記
添加順序に何ら限定されるものではない。In the method for treating a dredged slurry of the present invention, the order of addition of each additive is not particularly limited, and it is possible to simultaneously add all the additives at the same time, but preferably any of the following It is desirable to carry out by the procedure, but the addition order is not limited to the following.
【００２３】 浚渫スラリーに所定量のフライアッシ
ュを添加混合した後、所定量の水溶性高分子吸収材を添
加混合する。 浚渫スラリーに所定量のフライアッシュを添加混合
した後、水溶性高分子吸収材を添加混合し、更にセメン
ト及び／又は生石灰を添加混合する。 浚渫スラリーにフライアッシュの所定添加量の一部
を添加混合した後、水溶性高分子吸収材を添加混合し、
フライアッシュの残部とセメント及び／又は生石灰とを
添加混合する。After adding and mixing a predetermined amount of fly ash to the dredging slurry, a predetermined amount of water-soluble polymer absorbent is added and mixed. After adding and mixing a predetermined amount of fly ash to the dredging slurry, the water-soluble polymer absorbent is added and mixed, and further cement and / or quick lime is added and mixed. After adding and mixing a part of the predetermined amount of fly ash to the dredging slurry, add and mix the water-soluble polymer absorbent,
The rest of the fly ash and the cement and / or quick lime are added and mixed.
【００２４】また、フライアッシュとしては、微粉炭灰
又は流動床ボイラー灰等を用いることができる。特に、
流動床ボイラー灰であれば、含有されるＣａＯ，ＣａＳ
Ｏ4により、より一層効率的に固化処理を行うことがで
きる。As fly ash, pulverized coal ash or fluidized bed boiler ash can be used. In particular,
If it is a fluidized bed boiler ash, it contains CaO, CaS
O 4 allows the solidification treatment to be performed more efficiently.
【００２５】これらフライアッシュは、産業廃棄物とし
て各所で多量に発生するものであり、安価に入手するこ
とができる。These fly ashes are produced in large amounts in various places as industrial waste and can be obtained at low cost.
【００２６】なお、微粉炭灰、流動床ボイラーの一般的
な組成は次の通りである。The general composition of pulverized coal ash and fluidized bed boiler is as follows.
【００２７】[0027]
【表１】 [Table 1]
【００２８】[0028]
【作用】微粉炭灰や流動床ボイラー灰等のフライアッシ
ュは、比重が軽く、吸水性が高く、高含水率浚渫スラリ
ーの体積当りの水分を有効に低減することができる。[Function] Fly ash such as pulverized coal ash and fluidized bed boiler ash has a low specific gravity and high water absorption, and can effectively reduce the water content per volume of the high water content dredging slurry.
【００２９】特に流動床ボイラー灰は、ＣａＯを多量に
含むため水分調整及びポゾラン反応による固化に有効で
あり、また、ＣａＳＯ4 を含むためエトリンガイトの生
成による団粒化強度の発現に有効である。In particular, the fluidized bed boiler ash is effective in adjusting the water content and solidifying by the pozzolan reaction because it contains a large amount of CaO, and is effective in expressing the aggregation strength due to the formation of ettringite because it contains CaSO 4 .
【００３０】これらフライアッシュを添加することによ
り、浚渫スラリーの含水率が低減し、適当量の水溶性高
分子吸収材、或いは水溶性高分子吸収材とセメント及び
／又は生石灰との添加により、所望の強度に団粒化する
ことが可能となる。By adding these fly ash, the water content of the dredging slurry is reduced, and by adding an appropriate amount of the water-soluble polymer absorbent or the water-soluble polymer absorbent and cement and / or quick lime, It becomes possible to form aggregates with the strength of.
【００３１】請求項２の方法によれば、団粒化の強度を
高めることができ、埋立て等の再利用に有効である。According to the method of claim 2, the strength of agglomeration can be increased, and it is effective for reuse such as landfill.
【００３２】[0032]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明する。EXAMPLES The present invention will be described in more detail with reference to the following examples.
【００３３】実施例１〜９、比較例１〜４ 含水率１５４％の高含水率浚渫スラリーに表３に示す割
合で各添加材を添加混合し、団粒化の可否を調べ、結果
を表３に示した。Examples 1 to 9 and Comparative Examples 1 to 4 Each additive was added and mixed at a ratio shown in Table 3 to the high water content dredging slurry having a water content of 154%, and whether or not the material was aggregated was examined. Shown in 3.
【００３４】なお、用いたフライアッシュの組成は表２
に示す通りである。また、添加順序は前記又はの方
法を採用した。The composition of the fly ash used is shown in Table 2.
As shown in. In addition, the addition order adopted the above method.
【００３５】団粒化強度は、比較例１で得られたものを
基準とし、相対評価により示した。The aggregated strength was shown by relative evaluation with reference to the one obtained in Comparative Example 1.
【００３６】[0036]
【表２】 [Table 2]
【００３７】[0037]
【表３】 [Table 3]
【００３８】表３より明らかなように、本発明の方法に
よれば、天日乾燥を行なうことなく、水溶性高分子吸収
材やセメント、生石灰の少ない添加量にて、安価に高含
水率浚渫スラリーの団粒化を行うことができる。As is clear from Table 3, according to the method of the present invention, the water content of the water-soluble polymer absorbent, the cement and the quick lime are added in a small amount without performing the sun drying, and the high water content dredging is carried out at a low cost. Aggregation of the slurry can be performed.
【００３９】これに対して、フライアッシュを用いない
比較例１，２では、団粒化のために多量の水溶性高分子
吸収材やセメントが必要とされる。また、フライアッシ
ュを用いず、実施例１，３と同程度の水溶性高分子吸収
材やセメント添加量とした比較例３，４では団粒化不可
能であった。On the other hand, in Comparative Examples 1 and 2 which do not use fly ash, a large amount of water-soluble polymer absorbent or cement is required for agglomeration. Further, in Comparative Examples 3 and 4 in which the amount of water-soluble polymer absorbent and the amount of cement added were the same as in Examples 1 and 3 without using fly ash, it was impossible to aggregate.
【００４０】[0040]
【発明の効果】以上詳述した通り、本発明の浚渫スラリ
ーの処理方法によれば、含水率１００％以上の高含水率
浚渫スラリーを、安価にしかも容易に入手可能なフライ
アッシュを用いることにより、高価な添加材を多量に添
加することなく、低コストに、効率的に団粒化処理する
ことができる。As described above in detail, according to the method for treating a dredging slurry of the present invention, a high water content dredging slurry having a water content of 100% or more is used by using fly ash which is easily available at low cost. It is possible to efficiently perform the agglomeration treatment at low cost without adding a large amount of expensive additive material.
【００４１】請求項２の方法によれば、団粒化強度を高
め、所望の強度を有する団粒を得ることができる。According to the method of claim 2, it is possible to increase the agglomeration strength and obtain agglomerates having a desired strength.
Claims (2)
上の浚渫スラリーを団粒化処理する方法であって、該浚
渫スラリーにフライアッシュと水溶性高分子吸収材とを
添加することを特徴とする浚渫スラリーの処理方法。1. A method for aggregating a dredging slurry having a water content of 100% by weight or more based on solid content, wherein fly ash and a water-soluble polymer absorbent are added to the dredging slurry. Method for treating dredging slurry.
上の浚渫スラリーを団粒化処理する方法であって、該浚
渫スラリーにフライアッシュと、水溶性高分子吸収材
と、セメント及び／又は生石灰とを添加することを特徴
とする浚渫スラリーの処理方法。2. A method for aggregating a dredging slurry having a water content of 100% by weight or more with respect to solid content, wherein fly ash, a water-soluble polymer absorbent, cement and / or quick lime are added to the dredging slurry. A method for treating a dredging slurry, which comprises adding and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6039458A JP2636725B2 (en) | 1994-03-10 | 1994-03-10 | Aggregation treatment method of dredged slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6039458A JP2636725B2 (en) | 1994-03-10 | 1994-03-10 | Aggregation treatment method of dredged slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07246396A true JPH07246396A (en) | 1995-09-26 |
| JP2636725B2 JP2636725B2 (en) | 1997-07-30 |
Family
ID=12553607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6039458A Expired - Lifetime JP2636725B2 (en) | 1994-03-10 | 1994-03-10 | Aggregation treatment method of dredged slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2636725B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11256154A (en) * | 1998-03-10 | 1999-09-21 | Oji Ryokka Kk | Soil improvement |
| JP2001115158A (en) * | 1999-10-15 | 2001-04-24 | Shigenori Yamada | Production method of granular soil using molten slag of refuse |
| JP2002273484A (en) * | 2001-03-23 | 2002-09-24 | Hitachi Constr Mach Co Ltd | Treatment method of sludgy waste, treatment system and mixing treatment equipment |
| DE102012102473A1 (en) * | 2012-03-22 | 2013-09-26 | Xtract Gmbh | Treating sewage sludge, useful for improving its storage- and/or transport properties, comprises mechanically dewatering sludge, and mixing dewatered sludge with superabsorbent or hydrogel to obtain granules with specific moisture content |
| US9303128B2 (en) | 2012-03-15 | 2016-04-05 | Sachtleben Pigment Gmbh | Method for granulating particle-containing material obtained from industrial processes, the granulate thus produced, and use thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5162828A (en) * | 1974-11-29 | 1976-05-31 | Fudo Construction Co | |
| JPS51141459A (en) * | 1975-06-02 | 1976-12-06 | Taisei Corp | Method of solidifying dirty mud |
| JPS5325270A (en) * | 1976-08-20 | 1978-03-08 | Japan Exlan Co Ltd | Solidifying method for sludgy substance |
| JPS54112553A (en) * | 1978-02-20 | 1979-09-03 | Japan Exlan Co Ltd | Granular solidifying method of muddy matter |
| JPS62117698A (en) * | 1985-11-15 | 1987-05-29 | Mitsubishi Heavy Ind Ltd | Solidifying method for sludge |
| JPS644969A (en) * | 1987-06-26 | 1989-01-10 | Nippon Electric Eng | System for identifying data code system on magnetic tape and disk |
| JPH0442080A (en) * | 1990-06-08 | 1992-02-12 | Clarion Co Ltd | Broadcasting satellite mobile receiver |
-
1994
- 1994-03-10 JP JP6039458A patent/JP2636725B2/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5162828A (en) * | 1974-11-29 | 1976-05-31 | Fudo Construction Co | |
| JPS51141459A (en) * | 1975-06-02 | 1976-12-06 | Taisei Corp | Method of solidifying dirty mud |
| JPS5325270A (en) * | 1976-08-20 | 1978-03-08 | Japan Exlan Co Ltd | Solidifying method for sludgy substance |
| JPS54112553A (en) * | 1978-02-20 | 1979-09-03 | Japan Exlan Co Ltd | Granular solidifying method of muddy matter |
| JPS62117698A (en) * | 1985-11-15 | 1987-05-29 | Mitsubishi Heavy Ind Ltd | Solidifying method for sludge |
| JPS644969A (en) * | 1987-06-26 | 1989-01-10 | Nippon Electric Eng | System for identifying data code system on magnetic tape and disk |
| JPH0442080A (en) * | 1990-06-08 | 1992-02-12 | Clarion Co Ltd | Broadcasting satellite mobile receiver |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11256154A (en) * | 1998-03-10 | 1999-09-21 | Oji Ryokka Kk | Soil improvement |
| JP2001115158A (en) * | 1999-10-15 | 2001-04-24 | Shigenori Yamada | Production method of granular soil using molten slag of refuse |
| JP2002273484A (en) * | 2001-03-23 | 2002-09-24 | Hitachi Constr Mach Co Ltd | Treatment method of sludgy waste, treatment system and mixing treatment equipment |
| US9303128B2 (en) | 2012-03-15 | 2016-04-05 | Sachtleben Pigment Gmbh | Method for granulating particle-containing material obtained from industrial processes, the granulate thus produced, and use thereof |
| DE102012102473A1 (en) * | 2012-03-22 | 2013-09-26 | Xtract Gmbh | Treating sewage sludge, useful for improving its storage- and/or transport properties, comprises mechanically dewatering sludge, and mixing dewatered sludge with superabsorbent or hydrogel to obtain granules with specific moisture content |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2636725B2 (en) | 1997-07-30 |
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