JP2000334210A - Flocculant and method for treating suspension using the same - Google Patents
Flocculant and method for treating suspension using the sameInfo
- Publication number
- JP2000334210A JP2000334210A JP11146682A JP14668299A JP2000334210A JP 2000334210 A JP2000334210 A JP 2000334210A JP 11146682 A JP11146682 A JP 11146682A JP 14668299 A JP14668299 A JP 14668299A JP 2000334210 A JP2000334210 A JP 2000334210A
- Authority
- JP
- Japan
- Prior art keywords
- flocculant
- acrylic polymer
- ppm
- nonionic acrylic
- polymer agent
- 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
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えば懸濁物質
を含む排水（以下、処理原水ともいう。）などの懸濁水
に含まれる懸濁物質を凝集する凝集剤及びその凝集剤を
使用した懸濁水の処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flocculant for flocculating suspended substances contained in suspended water such as wastewater containing suspended substances (hereinafter also referred to as raw water to be treated) and a suspension using the flocculant. The present invention relates to a method for treating turbid water.
【０００２】[0002]
【従来の技術】例えば、下水や土木工事の際に生じる排
水は、微細な懸濁物質を懸濁した懸濁水になっている。
これらの排水を沈降槽に導いて、懸濁物質を沈降させ、
泥分と上澄み水とに分離する排水処理方法では、凝集剤
を添加することによって、懸濁物質の沈降速度を早めて
いる。2. Description of the Related Art For example, wastewater generated during sewage or civil engineering work is suspension water in which fine suspended substances are suspended.
These wastewaters are led to a settling tank to settle suspended matter,
In the wastewater treatment method for separating mud and supernatant water, the sedimentation speed of suspended matter is increased by adding a flocculant.
【０００３】従来から種々の凝集剤が知られており、無
機系の凝集剤として硫酸アルミニウムや炭酸マグネシウ
ムなどの低分子からなるものや、ポリ塩化アルミニウム
やポリ塩化鉄などの高分子からなる凝集剤が知られてい
る。また、高分子系の凝集剤として、ポリアクリルアミ
ドやポリエチレノキサイドなどのノニオン系、ポリアク
リル酸ナトリウムなどのアニオン系、またはノニオン系
アクリル高分子やポリアミノメチルアクリルアミドなど
のカチオン系などの多数の凝集剤が知られている。そし
て、これらの凝集剤は、それぞれの懸濁水に適したもの
が選択されて使用されている。Conventionally, various coagulants have been known, such as inorganic coagulants composed of low molecular weight compounds such as aluminum sulfate and magnesium carbonate and coagulants composed of polymers such as polyaluminum chloride and polyiron chloride. It has been known. In addition, as a polymer-based flocculant, a large number of flocculants such as nonionic such as polyacrylamide and polyethylene oxide, anionic such as sodium polyacrylate, and cationic such as nonionic acrylic polymer and polyaminomethylacrylamide It has been known. These coagulants are selected and used for each suspension water.
【０００４】例えば泥水シールド工法によるトンネル掘
削工事や道路工事などの土木工事では、水ガラス、シリ
カレジン系樹脂を注入して地盤の強化を図ったり、ウレ
タンなどを注入してセメントの硬化促進を図っている。
このためかかる工事に伴う大量の排水には、水ガラスな
どのセンメント凝固促進剤を含んでいて、その処理が困
難とされている。使用されている凝集剤として、無機剤
であるＰＡＣ（ポリ塩化アルミニウム）にアニオン系の
高分子剤を組み合わせが広く知られている。特開昭５２
−５９９４７号公報には、水ガラスを含む排水の凝集剤
として、塩化カルシウム、硫酸カルシウムなどのカルシ
ウム塩を用いる技術を開示している。この発明では、カ
ルシウム塩のみを添加したのでは、凝集効果をできず、
同時に水酸化ナトリウムを添加して、ｐＨ８〜１１を示
す排水のｐＨ値を更に１．０以上高める必要があるとし
ている。For example, in civil engineering works such as tunnel excavation works and road works by a muddy water shield method, the ground is strengthened by injecting water glass or silica resin-based resin, or urethane is injected to promote the hardening of cement. I have.
For this reason, a large amount of wastewater accompanying such construction contains a cement coagulation accelerator such as water glass, and it is considered difficult to treat the wastewater. As an aggregating agent used, a combination of an inorganic agent such as PAC (polyaluminum chloride) with an anionic polymer agent is widely known. JP 52
JP-A-59947 discloses a technique using a calcium salt such as calcium chloride or calcium sulfate as a coagulant for wastewater containing water glass. In this invention, the aggregation effect cannot be achieved by adding only the calcium salt,
At the same time, it is necessary to add sodium hydroxide to further increase the pH value of the wastewater showing pH 8 to 11 by 1.0 or more.
【０００５】また、特開昭５５−１３７０８４号公報に
は、水ガラスを含む排水を処理するために、ｐＨ８．５
以上の条件の下で、消石灰などのカルシウムイオンを放
出する難溶性カルシウム含有物質を添加した後に、従来
公知の凝集剤によって懸濁粒子を凝集沈殿させる方法が
開示されている。Further, Japanese Patent Application Laid-Open No. 55-137084 discloses a method for treating wastewater containing water glass, which has a pH of 8.5.
A method is disclosed in which, under the above-described conditions, a hardly soluble calcium-containing substance that releases calcium ions such as slaked lime is added, and then suspended particles are coagulated and precipitated with a conventionally known coagulant.
【０００６】さらに、特開平６−３１５６８８号公報に
は、排水のｐＨを１１〜１２の高アルカリ性に調整した
上で、塩化カルシウム、塩化ナトリウムまたは硫酸アル
ミニウムなどの水ガラスとゲル化反応する金属塩を添加
して、不溶性の珪酸金属塩として析出する排水の処理方
法が開示されている。Further, JP-A-6-315688 discloses a metal salt which undergoes a gelling reaction with water glass such as calcium chloride, sodium chloride or aluminum sulfate after adjusting the pH of waste water to a high alkalinity of 11 to 12. A method for treating wastewater that precipitates as an insoluble metal silicate salt by adding water is disclosed.
【０００７】[0007]
【発明が解決しようとする課題】しかし、ＰＡＣにアニ
オン系の高分子剤を混合した凝集剤は、排水中のセメン
ト凝固促進剤の濃度が低い場合には不十分ながらそれな
りの凝集効果が得られるが、セメント凝固促進剤が約２
％程度に高濃度となった排水に対しては、凝集効果が低
い。また、ＰＡＣとアニオン系の高分子剤を予め混合し
た混合液にすると、相互反応によって変質して、凝集効
果を失うことが知られており、使用に際しては、それぞ
れを別個に溶解した二つのタンクから、それぞれを排水
中に添加する必要があった。このために、水処理設備が
複雑になるとともに、その取扱いが面倒であった。However, a coagulant obtained by mixing an anionic polymer agent with PAC can provide a sufficient coagulation effect when the concentration of the cement setting accelerator in the waste water is low. But the cement setting accelerator is about 2
For wastewater with a high concentration of about%, the coagulation effect is low. It is also known that if a mixture of PAC and an anionic polymer agent is mixed in advance, the mixture is denatured by the mutual reaction and loses the coagulation effect. Therefore, each had to be added to the wastewater. This complicates the water treatment equipment and complicates its handling.
【０００８】また、特開昭５２−５９９４７号公報、特
開昭５５−１３７０８４号公報および特開平６−３１５
６８８号公報に開示された方法では、いずれも排水のｐ
Ｈを極めて高アルカリ性を呈する排水に対して適用でき
る方法であるため、その適用が限定されたものであっ
た。また、適用するには、排水に水酸化ナトリウム等の
アルカリ剤を添加して高アルカリ性にする前処理工程が
必要とされ、さらにが処理済みの排水を放流するには、
再度中和処理が必要とされるなど、水処理設備が著しく
複雑になって大型化していた。Further, JP-A-52-59947, JP-A-55-137084 and JP-A-6-315.
According to the method disclosed in Japanese Patent Publication No.
Since H is a method applicable to wastewater exhibiting extremely high alkalinity, its application has been limited. In addition, in order to apply, a pretreatment step of adding an alkali agent such as sodium hydroxide to the wastewater to make it highly alkaline is required, and in order to discharge the treated wastewater,
The water treatment equipment has become extremely complicated and large in size, such as the necessity of neutralization treatment again.
【０００９】これらの課題を解決するために、本発明者
は、特定の無機剤と高分子剤とを組み合わせた凝集剤に
ついて研究したところ、凝集効果が高く、またセメント
凝固促進剤などを含むために従来処理が困難とされてい
た排水に対しても適用できる凝集剤を見出したものであ
る。In order to solve these problems, the present inventor has studied a flocculant obtained by combining a specific inorganic agent and a polymer agent, and found that the flocculant has a high flocculant effect and contains a cement coagulation accelerator and the like. The present inventors have found a coagulant which can be applied to wastewater which has been conventionally difficult to treat.
【００１０】[0010]
【課題を解決するための手段】請求項１の発明の凝集剤
は、混合比でノニオン系アクリル高分子剤１に対して
０．５〜１０の塩化カルシウムと、０．５〜１０の塩化
マグネシウムとからなる。ノニオン系アクリル高分子と
しては、ポリアクリルアミド、ポリエチレンオキサイ
ド、尿素、ホルマリン樹脂等の凝集剤を使用することが
できる。特に、ポリアクリルアミドは、毒性が無く、水
処理に添加しても、河川などを汚染することの少ない物
質とされている。以上の理由によって望ましい。The coagulant according to the first aspect of the present invention comprises a nonionic acrylic polymer 1 in a mixing ratio of 0.5 to 10 calcium chloride and 0.5 to 10 magnesium chloride. Consists of As the nonionic acrylic polymer, a flocculant such as polyacrylamide, polyethylene oxide, urea, and formalin resin can be used. In particular, polyacrylamide has no toxicity and is considered to be a substance that does not pollute rivers and the like even when added to water treatment. It is desirable for the above reasons.
【００１１】混合比は、ノニオン系アクリル高分子剤１
に対して１〜１０の塩化カルシウムおよび１〜１０の塩
化マグネシウムとする。この混合比を外れると処理後の
濁度が高く、充分な凝集効果が得られない。特に、ノニ
オン系アクリル高分子剤１に対して３〜７の塩化カルシ
ウムおよび３〜７の塩化マグネシウムの混合比率の場合
には、沈降速度が速く、凝集力が良く、上澄濁度の点で
より望ましい。The mixing ratio is as follows: Nonionic acrylic polymer agent 1
To 1 to 10 calcium chloride and 1 to 10 magnesium chloride. If the mixing ratio is out of this range, the turbidity after the treatment is high, and a sufficient coagulation effect cannot be obtained. In particular, in the case of a mixture ratio of 3 to 7 calcium chloride and 3 to 7 magnesium chloride with respect to the nonionic acrylic polymer agent 1, the sedimentation speed is high, the cohesion is good, and the supernatant turbidity is low. More desirable.
【００１２】予めノニオン系アクリル高分子と無機剤と
を溶媒に溶かした一液からなる凝集剤としておけば、容
易に処理原水に添加することができる（請求項２）。混
合された混合液は、保存性に優れ、凝集効果が長期にわ
たって保持される。従って、この混合液を入れた一つの
タンクから処理原水中に添加することができ、簡素な水
処理設備にできる。If a nonionic acrylic polymer and an inorganic agent are previously dissolved in a solvent as a coagulant consisting of one liquid, it can be easily added to the raw water to be treated (claim 2). The mixed liquid mixture is excellent in preservability, and the aggregation effect is maintained for a long time. Therefore, the mixed liquid can be added to the raw water from one tank containing the mixed liquid, and a simple water treatment facility can be obtained.
【００１３】請求項３の発明は、請求項１または請求項
２の凝集剤を用いた懸濁水の処理方法に関し、ノニオン
系アクリル高分子剤を１．５〜４ｐｐｍと、５〜１５ｐ
ｐｍの塩化カルシウムと、５〜１５ｐｐｍの塩化マグネ
シウムとを添加することにしている。これにより、処理
原水中に懸濁している懸濁物質が速やかに凝集、沈殿し
て上澄液と分離される。特に従来処理が困難であった、
土木工事の際に排出されるセメント凝固促進剤を含有す
る土木汚水に対しても適用できる。According to a third aspect of the present invention, there is provided a method for treating suspension water using the flocculant according to the first or second aspect, wherein the nonionic acrylic polymer is 1.5 to 4 ppm and 5 to 15 ppm.
pm of calcium chloride and 5 to 15 ppm of magnesium chloride are to be added. As a result, the suspended substance suspended in the raw water to be treated is rapidly aggregated and precipitated, and separated from the supernatant. In particular, conventional processing was difficult,
The present invention can also be applied to civil sewage containing a cement solidification accelerator discharged during civil engineering work.
【００１４】凝集剤の添加量は、極めて微量でよく、ノ
ニオン系アクリル高分子剤を１．５ｐｐｍ以上添加する
ことによって、凝集効果が発揮される。特に２ｐｐｍ以
上添加することが望ましく、４ｐｐｍ以上添加しても、
それ以上の凝集効果の向上は望めず、かえって不経済に
なる。このため、ノニオン系アクリル高分子剤を１ｐｐ
ｍ〜３ｐｐｍ添加するのが望ましい。The amount of the coagulant added may be extremely small, and the coagulation effect is exhibited by adding 1.5 ppm or more of the nonionic acrylic polymer agent. It is particularly desirable to add 2 ppm or more, and even if 4 ppm or more is added,
No further improvement in the coagulation effect can be expected, which is rather uneconomical. Therefore, 1 pp of nonionic acrylic polymer agent
It is desirable to add m to 3 ppm.
【００１５】[0015]
【発明の効果】請求項１、または２の発明では、混合比
でノニオン系アクリル高分子剤１に対して０．５〜１０
の塩化カルシウムと、０．５〜１０の塩化マグネシウム
とを混合していることにより、優れた凝集効果を奏す
る。According to the first or second aspect of the present invention, the mixing ratio of the nonionic acrylic polymer 1 to the nonionic acrylic polymer 1 is 0.5 to 10%.
By mixing calcium chloride with magnesium chloride of 0.5 to 10, excellent coagulation effect is exhibited.
【００１６】請求項３の発明では、ノニオン系アクリル
高分子剤を１．５〜４ｐｐｍと、５〜１５ｐｐｍの塩化
カルシウムと、５〜１５ｐｐｍの塩化マグネシウムとを
添加して懸濁水から懸濁物質を凝集する懸濁水の処理方
法とすることにより、優れた排水処理の効果を奏する。According to the third aspect of the present invention, 1.5 to 4 ppm of a nonionic acrylic polymer, 5 to 15 ppm of calcium chloride, and 5 to 15 ppm of magnesium chloride are added to suspend the suspended substance from the suspension water. By using a method for treating coagulated suspension water, an excellent effect of wastewater treatment can be obtained.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施の形態につい
て詳細に説明する。ノニオン系アクリル高分子として、
荏原製作所製エバグロースＮ２００（商標、以下、Ｎ２
００という。）を使用した。また、塩化カルシウム（Ｃ
ａＣｌ２）及び塩化マグネシウム（ＭｇＣｌ２）につい
ては試薬を使用した。このノニオン系アクリル高分子と
塩化カルシウム及び塩化マグネシウムを水に溶解して凝
集剤溶液を調整した。Embodiments of the present invention will be described below in detail. As a nonionic acrylic polymer,
Ebararose N200 (trademark, hereinafter referred to as N2)
00. )It was used. In addition, calcium chloride (C
NaCl 2) and the magnesium chloride (MgCl 2) was used reagents. The nonionic acrylic polymer and calcium chloride and magnesium chloride were dissolved in water to prepare a flocculant solution.
【００１８】また、比較のために、現在セメントの硬化
促進剤を含んだ土木排水に広く使用されている無機剤の
ＰＡＣ（ポリ塩化アルミニウム）とアニオン系の高分子
剤からなる凝集剤溶液も調整した。For comparison, a coagulant solution consisting of an inorganic agent PAC (polyaluminum chloride) and an anionic polymer agent, which are currently widely used in civil engineering drainage containing a cement hardening accelerator, was also prepared. did.
【００１９】処理原水としては、処理が困難な排水の一
例として、愛知県名古屋市千種区の東山トンネル工事作
業所から採取した濁水を用いた。この処理原水は、泥水
シールド工法による排水であって、水ガラス、ウレタン
及びレジンのセンメント硬化促進剤などが２％含まれ、
また、その濁度は９２００ｐｐｍ、ｐＨは１１．５であ
った。As an example of the treated raw water, turbid water collected from the Higashiyama tunnel construction work site in Chikusa-ku, Nagoya-shi, Aichi Prefecture was used as an example of wastewater that is difficult to treat. This treated raw water is wastewater by the muddy water shield method and contains 2% of water glass, urethane and resin cement hardening accelerators,
The turbidity was 9200 ppm and the pH was 11.5.
【００２０】凝集実験は、容器に処理原水１ｍ３を入
れ、そして溶製した凝集剤溶液の所定量を添加し、十分
に攪拌して懸濁させた後、懸濁粒子が沈降する沈降時間
を測定するとともに、その上澄み液を採取して懸濁粒子
の濃度を測定した。The agglomeration experiments holding processing raw water 1 m 3 in the vessel, and then adding a predetermined amount of melted the flocculant solution, after thoroughly suspended by stirring, a sedimentation time of suspended particles settle At the same time, the supernatant was collected and the concentration of suspended particles was measured.
【００２１】まず比較のために、ＰＡＣとアニオン系の
高分子剤の混合液による凝集試験を行なった。ＰＡＣ
は、多木化学株式会社製ＰＡＣ２５０Ａ（１０％溶液）
を、アニオン系高分子剤は東亞合成化学株式会社製Ａ−
１０１Ｂ（商標）を使用して凝集剤溶液を調整し、処理
原水１立方メートルに対して、凝集剤溶液を１００、２
００、３００、４００、６００ｃｃ添加して、ＰＡＣ濃
度で１０ｐｐｍ〜６０ｐｐｍとした。このＰＡＣによる
沈降試験の結果を表１に示す。First, for comparison, an agglutination test was carried out using a mixed solution of PAC and an anionic polymer. PAC
Is PAC250A (10% solution) manufactured by Taki Chemical Co., Ltd.
And the anionic polymer agent is A-
The coagulant solution was prepared using 101B (trademark), and 100 to 2 cubic meters of treated raw water was used.
By adding 00, 300, 400, and 600 cc, the PAC concentration was adjusted to 10 ppm to 60 ppm. Table 1 shows the results of the sedimentation test using this PAC.
【００２２】[0022]
【表１】 [Table 1]
【００２３】この結果、凝集剤の組成及び凝集剤添加量
にかかわらず、沈降速度は３８〜５５秒の及範囲に、ま
た、濁度も８４３〜１１９０ｓｓの範囲であり、清浄度
は低かった。なお、ここで濁度（ｓｓ）とは、処理水中
の浮遊物質量（ｐｐｍ）のことである。As a result, irrespective of the composition of the flocculant and the amount of the flocculant added, the sedimentation speed was in the range of 38 to 55 seconds, the turbidity was in the range of 843 to 1190 ss, and the cleanliness was low. Here, the turbidity (ss) refers to the amount of suspended substances (ppm) in the treated water.
【００２４】次に本発明の凝集剤の添加量の影響を知る
ために、１０００ｃｃの水にＮ２００を２ｇ（０．２重
量％）、１．０重量％ＣａＣｌ２および１．０重量％Ｍ
ｇＣｌ２を溶解した凝集剤溶液を調整し、沈降試験を行
った。この沈降試験の結果を表２に示す。なお、１立方
メートルの処理原水中に凝集剤溶液を３００〜２０００
ｃｃ添加し、この際のＮ２００の濃度を表２に添加量と
して示している。Next, in order to know the effect of the amount of the coagulant of the present invention, 2 g (0.2% by weight) of N200, 1.0% by weight CaCl 2 and 1.0% by weight M were added to 1000 cc of water.
A coagulant solution in which gCl 2 was dissolved was prepared, and a sedimentation test was performed. Table 2 shows the results of the sedimentation test. In addition, 300-2000 of coagulant solution was added to 1 cubic meter of raw water.
cc was added, and the concentration of N200 at this time is shown in Table 2 as an addition amount.
【００２５】[0025]
【表２】 [Table 2]
【００２６】これにより、Ｎ２００の濃度を１ｐｐｍ添
加した場合では、４６１ｓｓの濁度となり、清浄度が十
分ではなかった。一方、２ｐｐｍの添加量で、４０ｓｓ
の良好な結果が得られた。また、２ｐｐｍ以上の３ｐｐ
ｍおよび４ｐｐｍでもほとんど同じ良好な結果が得られ
た。このため、１．５ｐｐｍ以上添加することによって
良好な凝集効果の得られることが判明した。As a result, when the concentration of N200 was 1 ppm, the turbidity was 461 ss, and the cleanliness was not sufficient. On the other hand, with the addition amount of 2 ppm, 40 ss
Good results were obtained. In addition, 3pp of 2ppm or more
Almost the same good results were obtained at m and 4 ppm. For this reason, it turned out that a favorable aggregation effect can be obtained by adding 1.5 ppm or more.
【００２７】次に、本願発明の凝集剤の混合割合を変え
た凝集剤溶液を溶製し、沈降試験を行った。この沈降試
験の結果を表３〜５に示す。なお、各凝集剤溶液を処理
原水１立方メートルに対して、１０００ｃｃ添加して行
た。Next, a flocculant solution was prepared by changing the mixing ratio of the flocculant of the present invention and subjected to a sedimentation test. Tables 3 to 5 show the results of the sedimentation test. In addition, 1000 cc of each coagulant solution was added to 1 cubic meter of treated raw water.
【００２８】表３は、１．０重量％ＣａＣｌ２および
１．０重量％ＭｇＣｌ２とし、Ｎ２００を０．０１から
０．３重量％まで変えて、Ｎ２００の添加量を変化させ
たもので、０．１５重量％では、濁度が１２０ｓｓと、
その清浄度が十分ではなく、０．２重量％で、４０ｓｓ
の良好な結果が得られた。また、０．２５重量％および
０．３重量でもほとんど同じ良好な結果が得られた。こ
のため、０．１６重量％以上添加することによって良好
な凝集効果の得られることが判明した。Table 3 shows 1.0% by weight CaCl 2 and 1.0% by weight MgCl 2, and N200 was changed from 0.01 to 0.3% by weight to change the amount of N200 added. At 0.15% by weight, the turbidity is 120 ss,
The cleanliness is not enough.
Good results were obtained. Almost the same good results were obtained with 0.25% by weight and 0.3% by weight. Therefore, it was found that a good aggregation effect can be obtained by adding 0.16% by weight or more.
【００２９】[0029]
【表３】 [Table 3]
【００３０】[0030]
【表４】 [Table 4]
【００３１】[0031]
【表５】 [Table 5]
【００３２】表４および表５は、凝集剤溶液を０．２重
量％Ｎ２００とし、これに２〜０．０１重量％のＣａＣ
ｌ２およびＭｇＣｌ２に変化して含有したものを調整
し、これを処理原液１立方メートルに対して１０００ｃ
ｃ添加した沈降実験であって、ＣａＣｌ２が０．０５重
量％以下では、沈降速度および濁度の点で凝集効果の少
ないことが判明した。また、ＣａＣｌ２が０．０５重量
％を越えた０．１〜２重量％のものでは、いずれも濁度
が１９０以下を示した。特に、ＭｇＣｌ２が０．１〜
１．０重量％のときに５０ｓｓ以下の優れた凝集効果を
示した。これらにより、本実施例の凝集剤が従来の凝集
剤と比較して、土木排水の凝集剤として極めて有効であ
ることが確認された。Tables 4 and 5 show that the flocculant solution was 0.2% by weight N200 and 2% to 0.01% by weight of CaC
l 2 and MgCl 2 were changed and contained and adjusted to 1000 c / m 3 of the undiluted solution.
In the sedimentation experiment in which c was added, it was found that when CaCl 2 was 0.05% by weight or less, the aggregation effect was small in terms of sedimentation speed and turbidity. In addition, those having a CaCl 2 content of 0.1 to 2 % by weight exceeding 0.05% by weight all exhibited a turbidity of 190 or less. Particularly, MgCl 2 is 0.1 to
At 1.0% by weight, an excellent coagulation effect of 50 ss or less was exhibited. From these, it was confirmed that the coagulant of this example was extremely effective as a coagulant for civil engineering drainage as compared with the conventional coagulant.
Claims (3)
に対して０．５〜１０の塩化カルシウムと、０．５〜１
０の塩化マグネシウムとを混合していることを特徴とす
る凝集剤。1. A nonionic acrylic polymer agent 1 in a mixing ratio
0.5 to 10 calcium chloride and 0.5 to 1
A flocculant characterized by being mixed with 0 magnesium chloride.
０．５〜１０の塩化カルシウムと、０．５〜１０の塩化
マグネシウムとを溶媒に溶解していることを特徴とする
凝集剤。2. A flocculant characterized in that 0.5 to 10 calcium chloride and 0.5 to 10 magnesium chloride are dissolved in a solvent with respect to the nonionic acrylic polymer agent 1.
４ｐｐｍと、５〜１５ｐｐｍの塩化カルシウムと、５〜
１５ｐｐｍの塩化マグネシウムとを添加して懸濁水から
懸濁物質を凝集することを特徴とする懸濁水の処理方
法。3. The method according to claim 1, wherein the nonionic acrylic polymer agent is 1.5 to
4 ppm, 5-15 ppm calcium chloride, 5
A method for treating suspended water, comprising adding 15 ppm of magnesium chloride and coagulating a suspended substance from the suspended water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11146682A JP2000334210A (en) | 1999-05-26 | 1999-05-26 | Flocculant and method for treating suspension using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11146682A JP2000334210A (en) | 1999-05-26 | 1999-05-26 | Flocculant and method for treating suspension using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000334210A true JP2000334210A (en) | 2000-12-05 |
Family
ID=15413214
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11146682A Pending JP2000334210A (en) | 1999-05-26 | 1999-05-26 | Flocculant and method for treating suspension using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000334210A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657163A (en) * | 2012-08-30 | 2014-03-26 | 张国胜 | Instant-type slime water separating agent as well as preparation method thereof |
| JP2015182034A (en) * | 2014-03-25 | 2015-10-22 | 日本碍子株式会社 | Method of treating drain water comprising water glass |
| CN112374594A (en) * | 2020-11-10 | 2021-02-19 | 菏泽华意化工有限公司 | Preparation method of flocculant for treating wastewater containing cyanuric acid |
-
1999
- 1999-05-26 JP JP11146682A patent/JP2000334210A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657163A (en) * | 2012-08-30 | 2014-03-26 | 张国胜 | Instant-type slime water separating agent as well as preparation method thereof |
| JP2015182034A (en) * | 2014-03-25 | 2015-10-22 | 日本碍子株式会社 | Method of treating drain water comprising water glass |
| CN112374594A (en) * | 2020-11-10 | 2021-02-19 | 菏泽华意化工有限公司 | Preparation method of flocculant for treating wastewater containing cyanuric acid |
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