JP2001104711A - Flocculant - Google Patents
FlocculantInfo
- Publication number
- JP2001104711A JP2001104711A JP28488599A JP28488599A JP2001104711A JP 2001104711 A JP2001104711 A JP 2001104711A JP 28488599 A JP28488599 A JP 28488599A JP 28488599 A JP28488599 A JP 28488599A JP 2001104711 A JP2001104711 A JP 2001104711A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- cao
- flocculant
- content
- water
- 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
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、下水、産業廃水、
浚渫土の処理の際に用いられる凝集剤に関する。より詳
細には、これらに含まれる汚泥粒子を凝集する凝集剤で
あってセメント製造の中間処理工程から容易に得られる
取り扱い性に優れた無機性の凝集剤に関する。TECHNICAL FIELD The present invention relates to sewage, industrial wastewater,
The present invention relates to a flocculant used in the treatment of dredged soil. More specifically, the present invention relates to an inorganic coagulant which coagulates sludge particles contained therein and has excellent handleability which can be easily obtained from an intermediate treatment step of cement production.
【０００２】[0002]
【従来技術】河川、湖沼、海域等の浚渫土或いは下水や
産業廃水は、一般に多量の汚泥粒子が懸濁した泥漿状の
流体となっている。これらを処分する場合、昨今の埋立
処分地の枯渇化に伴い、減容化即ちその容積をできるだ
け減少させることが望まれる。また、これらを有効利用
する場合もハンドリング性の向上のために減容化は不可
欠である。減容化の方法としては、天日乾燥・サンドド
レーン等の土木的脱水、真空濾過等の機械的脱水および
凝集剤の添加或いはこれらの技術を組み合わせる方法が
ある。被脱水物が高含水率のものでは、直接土木的脱水
処理を行うと処理時間が長くなり、その間対象物によっ
ては異臭を発したり、また均一な減容化も行い難い為、
まず凝集剤で沈降分離させ、これを土木的脱水処理や機
械的脱水することが行われている。一方で、凝集剤を用
いる方法は他の処理策と比較すると一般に処理コストが
高いものとなりがちであり、とりわけ高分子系凝集剤は
添加量は少なくて済むものの単価がかなり高い。このた
め、比較的安価な無機系の凝集剤、中でもより安価な凝
集剤としてセメント中間品などから製造されたものの開
発が進められている。2. Description of the Related Art Dredged soil, sewage, and industrial wastewater in rivers, lakes, marshes, sea areas, and the like are generally muddy fluids in which a large amount of sludge particles are suspended. When disposing of these, it is desired to reduce the volume, that is, reduce the volume as much as possible with the recent depletion of landfill sites. Also, when these are used effectively, volume reduction is indispensable in order to improve handleability. As a method for reducing the volume, there is a method of dewatering civil works such as sun drying and sand drain, a mechanical dehydration such as vacuum filtration, and adding a flocculant, or a method of combining these techniques. If the material to be dehydrated has a high water content, direct civil engineering dehydration will increase the processing time, and during that time, depending on the object, it may produce an unpleasant odor, and it may be difficult to reduce the volume evenly.
First, sedimentation and separation are performed with a flocculant, and this is subjected to civil dehydration treatment or mechanical dehydration. On the other hand, a method using a flocculant generally tends to have a higher treatment cost than other treatment methods. In particular, a polymer flocculant requires a small amount of addition, but the unit price is considerably high. Therefore, the development of relatively inexpensive inorganic coagulants, especially those manufactured from cement intermediate products and the like as inexpensive coagulants, is being promoted.
【０００３】[0003]
【発明が解決する課題】セメント中間品から製造した凝
集剤は、セメントクリンカー焼成物を原料とし、コスト
増加を抑えるために物理的及び化学的処理を最小限度に
留めたもので、従って新たな添加物を配合しない限り、
その主成分がシリカと生石灰からなるものである。この
ため、凝集化処理効率を高める観点から従来の無機系凝
集剤で一般に行われるように、凝集剤を水に加えて液状
に調整した凝集剤溶液を使用しようとすると、生石灰と
水とが反応し、顕著な発熱が起こる為、取り扱いに制約
が生じた。The coagulant produced from a cement intermediate product is obtained by using a fired cement clinker as a raw material and minimizing physical and chemical treatments in order to suppress an increase in cost. Unless you mix things,
Its main component is composed of silica and quicklime. For this reason, from the viewpoint of increasing the agglomeration treatment efficiency, as is generally done with a conventional inorganic coagulant, when trying to use a coagulant solution prepared by adding a coagulant to water and making it liquid, the quicklime and water react with each other. However, remarkable heat generation caused restrictions on handling.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記課題
の解決、即ちコストの増加を抑え、且つ凝集化能力も低
下させず、発熱を抑制して取り扱い性の改善を検討した
結果、前記のような凝集剤の主成分たる生石灰の一部又
は全てを、水と反応しても顕著な発熱が起きない水酸化
カルシウムに変換することで、かかる課題の解決を図る
ことができた。Means for Solving the Problems The inventors of the present invention have studied the solution of the above-mentioned problems, that is, an improvement in handleability by suppressing an increase in cost, without reducing the aggregating ability, and suppressing heat generation. Such a problem could be solved by converting part or all of quicklime, which is the main component of the flocculant, into calcium hydroxide that does not generate significant heat even when reacted with water.
【０００５】即ち、本発明は、シリカおよび水酸化カル
シウムを主成分とし、アルミニウム分及び鉄分を酸化物
換算でおのおの１〜８重量％、０．５〜６重量％含むこ
とを特徴とする凝集剤である。That is, the present invention provides a flocculant characterized by comprising silica and calcium hydroxide as main components and containing aluminum and iron in an amount of 1 to 8% by weight and 0.5 to 6% by weight, respectively, as oxides. It is.
【０００６】また、本発明は、セメント製造工程の中間
品であって、Ｃａ（ＯＨ）2又はＣａ（ＯＨ）2とＣａＯ
を４５〜７５重量％、ＳｉＯ2５〜３０重量％、Ａｌ2Ｏ
3１〜８重量％、Ｆｅ2Ｏ3０．５〜６重量％の鉱物成分
を含み、且つＣａＯとＣａ（ＯＨ）2の含有重量比がＣ
ａＯ／Ｃａ（ＯＨ）2＝０〜９であることを特徴とする
前記の凝集剤である。Further, the present invention is an intermediate product of a cement production process, wherein Ca (OH) 2 or Ca (OH) 2 and CaO
The 45 to 75 wt%, SiO 2 5 to 30 wt%, Al 2 O
3 1-8 wt%, wherein the Fe 2 O 3 0.5 to 6 wt% of the mineral component, and the content weight ratio of CaO and Ca (OH) 2 is C
The aggregating agent as described above, wherein aO / Ca (OH) 2 = 0 to 9.
【０００７】[0007]
【発明の実施の形態】本発明は、例えば河川、湖沼、海
域等の浚渫土、産業廃水、家庭等からの下水などの、懸
濁粒子からなる泥漿を凝集対象とした凝集剤に関するも
のである。本発明の凝集剤は、シリカおよび水酸化カル
シウムを主成分とし、アルミニウム分及び鉄分を酸化物
換算でおのおの１〜８重量％、０．５〜６重量％含むも
のであり、本発明においてシリカおよび水酸化カルシウ
ムを主成分とするとは、これら二成分の合計含有量が、
他の含有化学成分中最大の含有量を示す成分の含有量よ
りも多いことを云う。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a flocculant for flocculating mud consisting of suspended particles, for example, dredged soil in rivers, lakes and marshes, sea areas, etc., industrial wastewater, sewage from households and the like. . The coagulant of the present invention contains silica and calcium hydroxide as main components, and contains aluminum and iron in an amount of 1 to 8% by weight and 0.5 to 6% by weight in terms of oxide, respectively. To be based on calcium hydroxide, the total content of these two components,
It means that it is larger than the content of the component showing the largest content among other contained chemical components.
【０００８】上記成分中、シリカ及び水酸化カルシウム
は、高含水汚泥中の水分と各種の珪酸カルシウム化合物
を生成することにより、脱水作用と固形化作用を発揮す
る。また、アルミニウム分と鉄分はアルミニウムイオン
及び鉄イオンの供給源となり、カルシウムイオンと共に
汚泥粒子表面の陰イオンを中和して凝集を誘発させる。
アルミニウム分及び鉄分が酸化物換算で、各々１重量％
未満、０．５重量％未満ではこの効果が十分ではない。
一方、アルミニウム分及び鉄分が各々８重量％、６重量
％を超えても上記効果は大差ない。アルミニウム分の含
有量は１〜８重量％が適当であり、３〜７重量％が好ま
しい。また、鉄分の含有量は０．５〜６重量％が適当で
あり、１〜５重量％が好ましい。[0008] Among the above components, silica and calcium hydroxide exhibit a dehydrating action and a solidifying action by generating water and various calcium silicate compounds in the high water content sludge. Further, the aluminum component and the iron component serve as a supply source of the aluminum ion and the iron ion, and neutralize the anion on the sludge particle surface together with the calcium ion to induce aggregation.
1% by weight of aluminum and iron
If less than 0.5% by weight, this effect is not sufficient.
On the other hand, even if the aluminum content and the iron content exceed 8% by weight and 6% by weight, respectively, the above effects are not significantly different. The aluminum content is suitably from 1 to 8% by weight, and preferably from 3 to 7% by weight. The content of iron is suitably 0.5 to 6% by weight, preferably 1 to 5% by weight.
【０００９】本発明の凝集剤は、セメント製造工程の中
間品から好適に得ることができる。即ち、本発明はセメ
ント製造工程でのクリンカー焼成中に取り出した中間品
を消化することにより凝集剤として使用できるようにし
たものである。ここで、セメント製造工程の中間品と
は、セメントクリンカー焼成キルンの途中から取り出さ
れたクリンカー半焼成物であり、セメント製造ではクリ
ンカーに添加配合される他の原料成分は未配合としたも
のである。また、この中間品に粉砕等の物理的加工や加
熱等を行う必要は特にない。即ち、適度の加水による消
化のみを行えば良く、従って、極めて簡単に作製でき、
製造コストも比較的安価である。The coagulant of the present invention can be suitably obtained from an intermediate product in a cement production process. That is, the present invention digests an intermediate product taken out during clinker firing in a cement production process so that it can be used as a flocculant. Here, the intermediate product of the cement manufacturing process is a clinker semi-baked product taken out from the middle of the cement clinker firing kiln, and other raw material components added and blended into the clinker in the cement manufacturing process are not blended. . Further, there is no particular need to subject the intermediate product to physical processing such as pulverization or heating. That is, it is only necessary to perform digestion with a moderate amount of water.
Manufacturing costs are also relatively low.
【００１０】セメント製造工程の中間品から得られる本
発明の上記凝集剤は、具体的には、ＳｉＯ2：５〜３０
重量％、Ａｌ2Ｏ3：１〜８重量％、Ｆｅ2Ｏ3：０．５〜
６重量％の鉱物成分を含み、更にＣａ（ＯＨ）2又はＣ
ａ（ＯＨ）2とＣａＯ：４５〜７５重量％、但し、Ｃａ
Ｏの含有重量／Ｃａ（ＯＨ）2の含有重量＝０〜９なる
関係を満たす成分を含むものである。本凝集剤ではこれ
以外の含有成分として、通常のセメントクリンカー焼成
物に含まれる成分も含むことができる。[0010] The coagulant of the present invention obtained from an intermediate product in the cement production process is, specifically, SiO 2 : 5 to 30.
% By weight, Al 2 O 3 : 1 to 8% by weight, Fe 2 O 3 : 0.5 to
Contains 6% by weight of mineral components and further contains Ca (OH) 2 or C
a (OH) 2 and CaO: 45 to 75% by weight, provided that Ca
It contains components that satisfy the relationship of O content weight / Ca (OH) 2 content weight = 0-9. In the present coagulant, other components contained in the coagulant may include components contained in a normal cement clinker fired product.
【００１１】ＳｉＯ2、Ａｌ2Ｏ3、Ｆｅ2Ｏ3の各成分の
上記含有量範囲は、セメント製造の中間品中の成分含有
量範囲でもあるため、前記成分の含有量は自ずと上記範
囲に定まる。一方、カルシウム分も同様に中間品中に含
まれるカルシウム分の含有範囲によって定まるものの、
中間品中に含まれるカルシウム分の存在形態としては大
部分が生石灰（ＣａＯ）及び遊離ＣａＯで存在する為、
本発明の凝集剤ではこのＣａＯのうちの１０〜１００重
量％をＣａ（ＯＨ）2に変換して含有させたものとす
る。即ち、ＣａＯの含有重量／Ｃａ（ＯＨ）2の含有重
量＝０〜９なる関係を満たす必要がある。ＣａＯの含有
重量／Ｃａ（ＯＨ）2の含有重量の値が９を超えると水
に加えた時の発熱反応が顕著となり、取り扱い性に支障
を及ぼすことがあるので好ましくない。尚、ＣａＯの含
有重量／Ｃａ（ＯＨ）2の含有重量の値が０に近づくほ
ど水を加えた時の反応は常温に近づくので、より好まし
くは、ＣａＯの含有重量／Ｃａ（ＯＨ）2の含有重量＝
０〜２とする。カルシウム分は含水処理物中の固体粒子
を固結化できると共に、比較的早期の凝集力にも優れ
る。The content ranges of the components of SiO 2 , Al 2 O 3 , and Fe 2 O 3 are also the content ranges of the intermediate products of cement production, so the content of the components naturally falls within the above range. Is determined. On the other hand, although the calcium content is also determined by the content range of the calcium content in the intermediate product,
Most of the calcium contained in the intermediate product is in the form of quicklime (CaO) and free CaO,
In the flocculant of the present invention, 10 to 100% by weight of this CaO is converted to Ca (OH) 2 and contained. That is, the relationship of CaO content weight / Ca (OH) 2 content weight = 0 to 9 must be satisfied. If the value of the content of CaO / the weight of Ca (OH) 2 exceeds 9, the exothermic reaction when added to water becomes remarkable, which may undesirably impair the handling. It should be noted that, as the value of CaO content weight / Ca (OH) 2 content value approaches 0, the reaction when water is added approaches normal temperature, and more preferably, CaO content weight / Ca (OH) 2 Content weight =
0 to 2. The calcium component can solidify the solid particles in the hydrated product and is excellent in relatively early cohesion.
【００１２】尚、中間品中に含有するＣａＯのＣａ（Ｏ
Ｈ）2への変換方法としては、公知の消化方法であれば
特に限定されないが、例えば、常圧式消化装置や加圧式
消化装置を用いた乾式消化、ロータリー式、クラリファ
イヤー式、粉砕消化機を用いた湿式消化、散水機を用い
た散水による消化等の操作を行えば容易にできる。尚、
消化操作に於いて、大量のＣａＯを水によって一気にＣ
ａ（ＯＨ）2にすると、Ｃａ（ＯＨ）2への変換率を高め
たものほど消化の際に発熱し易くなるので、その場合は
前記例示した装置を使用し、比較的少量ずつ消化操作を
行うのが望ましい。The CaO contained in the intermediate product contains Ca (O
The method of conversion to H) 2 is not particularly limited as long as it is a known digestion method. Examples thereof include dry digestion using a normal-pressure digester and a pressurized digester, a rotary digester, a clarifier, and a pulverizer. This can be easily performed by performing operations such as wet digestion used and digestion by watering using a sprinkler. still,
In the digestion operation, a large amount of CaO is instantaneously
In the case of a (OH) 2 , the higher the conversion rate to Ca (OH) 2 , the easier it is to generate heat during digestion. In this case, the above-described apparatus is used, and the digestion operation is performed relatively little by little. It is desirable to do.
【００１３】本発明の凝集剤は、粉末のままでも使用で
きるが、水に加えて混合し、水溶液として使用すると良
い。水溶液にすることで高含水の処理対象物にも均一且
つ速やかに混ざり易く、凝集処理効率が格段に高まる。
水溶液中の凝集剤濃度は特に限定されないが、好ましく
は５〜４０％が良く、通常は外見的に乳濁状の溶液とな
れば使用できる。処理対象物に対する凝集剤溶液の使用
量も特に限定されるものではないが、高含水処理物を凝
集処理対象とする場合、処理対象物１００重量部に対
し、固形分で概ね０．１〜１００重量部相当を加えるの
が好ましい。これは０．１重量部未満では凝集作用が極
めて乏しく、また１００重量部を超える添加量では凝集
作用の向上が殆ど見られないため好ましくない。Although the coagulant of the present invention can be used as it is as a powder, it is preferable to mix it with water and use it as an aqueous solution. By making it into an aqueous solution, it is easy to uniformly and quickly mix with a high water content object to be treated, and the coagulation treatment efficiency is remarkably increased.
The concentration of the flocculant in the aqueous solution is not particularly limited, but is preferably 5 to 40%. Usually, it can be used as long as it is an emulsion-like solution in appearance. The amount of the coagulant solution used for the object to be treated is not particularly limited, but when the highly water-containing treated object is to be subjected to the coagulation treatment, the solid content is generally 0.1 to 100 parts by weight with respect to 100 parts by weight of the object to be treated. It is preferred to add equivalents by weight. If the amount is less than 0.1 part by weight, the coagulation action is extremely poor, and if the amount exceeds 100 parts by weight, the coagulation action is hardly improved, which is not preferable.
【００１４】凝集剤添加後の凝集物は、必要に応じ、濃
縮、沈降、脱水等を公知手法で行うことによって、十分
な減容化や一層の処理時間の短縮を行うことができる。
尚、本凝集剤は他の公知無機系凝集剤と併用しても良
い。The aggregates after the addition of the flocculant can be subjected to concentration, sedimentation, dehydration, etc. by a known method, if necessary, so that the volume can be sufficiently reduced and the processing time can be further shortened.
The present coagulant may be used in combination with another known inorganic coagulant.
【００１５】[0015]
【実施例】［実施例１〜３］ 普通セメント製造のクリ
ンカー焼成中に取り出したクリンカー構成成分以外には
配合物を加えてない中間品に、該中間品１００重量部に
対し、水約１５重量部が加わるよう常圧式消化装置を用
いて消化処理を行い、表１に記した含有成分のフレーク
状の凝集剤を作製した。この凝集剤の表２に記した重量
分をそれぞれ１００ｇの２５℃の水に添加し、攪拌混合
して凝集剤溶液を作製した。凝集剤を水に添加してから
約１分後の凝集剤溶液の温度を測定し、その結果を併せ
て表２に記す。次いで作製した各凝集剤溶液の全量を、
表３に記した固形成分からなる泥水２５００ｇ（含水率
約８０％）に投入し、攪拌機で約３分間攪拌した。攪拌
混練物は約１リットルをメスシリンダーに移してこれを
静置し、その間の混練物単位容積あたりの発生ブリージ
ング水の容積比を減容化率として３０分〜３日間の経時
変化で調べた。その結果を表２に併せて記す。Examples [Examples 1 to 3] About 15 parts by weight of water with respect to 100 parts by weight of the intermediate product, to which no compound was added except for the clinker component taken out during clinker firing in the production of ordinary cement. Digestion treatment was performed using an atmospheric pressure digester so as to add the parts, and flake-like flocculants having the components shown in Table 1 were produced. The weight of the coagulant described in Table 2 was added to 100 g of water at 25 ° C., respectively, and mixed with stirring to prepare a coagulant solution. The temperature of the coagulant solution was measured about 1 minute after adding the coagulant to water, and the results are shown in Table 2. Then, the total amount of each prepared flocculant solution,
The slurry was charged into 2500 g of muddy water (having a water content of about 80%) composed of the solid components described in Table 3, and stirred for about 3 minutes with a stirrer. About 1 liter of the stirred and kneaded material was transferred to a measuring cylinder and allowed to stand, and the volume ratio of the generated breathing water per unit volume of the kneaded material during that time was examined as a volume reduction rate over a period of 30 minutes to 3 days with time. . The results are also shown in Table 2.
【００１６】[0016]
【表１】 [Table 1]
【００１７】［比較例１］ 参考として他の条件は全て
同じで、前記加水による消化、即ちＣａＯのＣａ（Ｏ
Ｈ）2への変換処理のみを行っていない表１記載含有成
分の凝集剤を、固形分濃度がほぼ３０重量％の溶液とな
るよう２５℃の水に添加混合した。混合直後の凝集剤溶
液の温度を測定し、更にこの凝集剤溶液についても前記
と同様の泥水２．５Ｋｇに凝集剤溶液の全量を投入し、
投入した際の減容化率を調べた。測定結果は表２に併せ
て記す。[Comparative Example 1] For reference, all other conditions were the same.
H) A coagulant of the components described in Table 1, which had not been subjected to only the conversion treatment to 2 , was added to and mixed with water at 25 ° C. so that the solution had a solid content concentration of approximately 30% by weight. The temperature of the flocculant solution immediately after mixing was measured, and the same amount of the flocculant solution was further poured into 2.5 kg of the same muddy water as described above for this flocculant solution.
The volume reduction rate at the time of introduction was examined. The measurement results are also shown in Table 2.
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【表３】 [Table 3]
【００２０】[0020]
【発明の効果】本発明の凝集剤は、経済的にも安価であ
り、水と混ぜても顕著な発熱を生じることなく、ほぼ常
温の溶液として得ることができるので、この溶液を用い
ることで大量の含水処理対象物に対しても、高い凝集力
で斑無く短時間で安定した凝集処理を行うことができ
る。The coagulant of the present invention is economically inexpensive and can be obtained as a solution at almost normal temperature without significant heat generation even when mixed with water. Even for a large amount of water-containing treatment objects, stable coagulation can be performed in a short time with high cohesion without unevenness.
Claims (2)
とし、アルミニウム分及び鉄分を酸化物換算でおのおの
１〜８重量％、０．５〜６重量％含むことを特徴とする
凝集剤。1. A flocculant comprising silica and calcium hydroxide as main components and containing aluminum and iron in an amount of 1 to 8% by weight and 0.5 to 6% by weight in terms of oxides, respectively.
ａ（ＯＨ）2又はＣａ（ＯＨ）2とＣａＯを４５〜７５重
量％、ＳｉＯ2５〜３０重量％、Ａｌ2Ｏ3１〜８重量
％、Ｆｅ2Ｏ3０．５〜６重量％の鉱物成分を含み、且つ
ＣａＯとＣａ（ＯＨ）2の含有重量比がＣａＯ／Ｃａ
（ＯＨ）2＝０〜９であることを特徴とする請求項１記
載の凝集剤。2. An intermediate product of a cement production process, comprising:
a (OH) 2 or 45 to 75% by weight of Ca (OH) 2 and CaO, 5 to 30% by weight of SiO 2 , 1 to 8% by weight of Al 2 O 3 , and 0.5 to 6% by weight of Fe 2 O 3 It contains a mineral component, and the content weight ratio of CaO and Ca (OH) 2 is CaO / Ca
The coagulant according to claim 1, wherein (OH) 2 = 0 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28488599A JP4049493B2 (en) | 1999-10-05 | 1999-10-05 | Flocculant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28488599A JP4049493B2 (en) | 1999-10-05 | 1999-10-05 | Flocculant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001104711A true JP2001104711A (en) | 2001-04-17 |
| JP4049493B2 JP4049493B2 (en) | 2008-02-20 |
Family
ID=17684306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28488599A Expired - Fee Related JP4049493B2 (en) | 1999-10-05 | 1999-10-05 | Flocculant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4049493B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005009586A1 (en) * | 2003-07-25 | 2005-02-03 | Keiichiro Asaoka | Coagulant, process for producing the same, and method of coagulation with the coagulant |
| US7666311B2 (en) | 2005-12-26 | 2010-02-23 | Eccera Co., Ltd. | Flocculating agent |
| TWI558669B (en) * | 2016-03-03 | 2016-11-21 | 盛毅科技實業有限公司 | Alkali flocculating agent |
-
1999
- 1999-10-05 JP JP28488599A patent/JP4049493B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005009586A1 (en) * | 2003-07-25 | 2005-02-03 | Keiichiro Asaoka | Coagulant, process for producing the same, and method of coagulation with the coagulant |
| US7666916B2 (en) * | 2003-07-25 | 2010-02-23 | Keiichiro Asaoka | Flocculant, manufacturing method therefor, and flocculation method using the flocculant |
| US7666311B2 (en) | 2005-12-26 | 2010-02-23 | Eccera Co., Ltd. | Flocculating agent |
| TWI558669B (en) * | 2016-03-03 | 2016-11-21 | 盛毅科技實業有限公司 | Alkali flocculating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4049493B2 (en) | 2008-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3066095A (en) | Water purification agents and method of using same | |
| JP5776749B2 (en) | Cement-based solidified concrete sludge heat-dried powder and method for producing the same | |
| CN101774669B (en) | Composite dephosphorizing agent for treating acidic wastewater containing phosphorus and preparation and application methods thereof | |
| JP5034255B2 (en) | Dehydration and solidification method for highly hydrous soil | |
| CN101830613B (en) | Method for manufacturing autoclaved sand-lime brick or flyash brick as well as fertilizer and grease by sludge | |
| CN107758823A (en) | A kind of domestic sewage treating compound and preparation method thereof | |
| KR101268376B1 (en) | Composition for coagulant | |
| JP4827045B2 (en) | Water purification material and method for producing water purification material | |
| CN103073170B (en) | Deep sludge dehydrated method based on magnetic super-strong absorbent | |
| JP4049493B2 (en) | Flocculant | |
| US8013204B2 (en) | Use of partly prehydrated lime for separating a solid matter/liquid mixture, method for treating sludge and purified sludge obtained by said method | |
| CN108341583A (en) | A kind of sludge dehydration conditioner and its dewatering | |
| CN106865926A (en) | One kind has filled municipal sludge curing agent and its deep dehydration method | |
| CN113461304B (en) | Red mud-based mixed acid chemical conditioner special for deep dehydration of dehydrated sludge and use method thereof | |
| JPS5949078B2 (en) | Sludge treatment method | |
| JPH1176706A (en) | Special solid fine powdery flocculant composition | |
| JP4418244B2 (en) | Method for producing powdered solidified material | |
| JP4006584B2 (en) | Fluorine adsorbent and method for treating fluorine in water | |
| JPH105800A (en) | Dehydration treating material for sludge and dehydration treatment | |
| JP2002045610A (en) | Powdery cleaning agent, and method for cleaning city water and waste water | |
| JP4219052B2 (en) | Cement raw material manufacturing method from muddy water | |
| JP3997534B2 (en) | Flocculant | |
| CN112093870A (en) | Method for preparing efficient composite flocculant by taking red mud as raw material | |
| JPH0929293A (en) | Treatment of bottom deposit in lake and marsh or the like | |
| CN113000014B (en) | Method for preparing efficient dephosphorizing agent by utilizing waste incineration fly ash and product thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060214 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20071005 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20071016 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20071026 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20071120 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20071127 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101207 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101207 Year of fee payment: 3 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101207 Year of fee payment: 3 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |