WO2015045093A1 - Water treatment method - Google Patents
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- WO2015045093A1 WO2015045093A1 PCT/JP2013/076258 JP2013076258W WO2015045093A1 WO 2015045093 A1 WO2015045093 A1 WO 2015045093A1 JP 2013076258 W JP2013076258 W JP 2013076258W WO 2015045093 A1 WO2015045093 A1 WO 2015045093A1
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- water
- flocculant
- functional group
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- hydrophobic functional
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers
Definitions
- the present invention relates to a water treatment method, and more particularly, to a water treatment method of subjecting water to be treated to a flocculation treatment and then a floating separation treatment.
- JP-A-7-241597, JP-A-2002-113471, and JP-A-2007-209890 describe a method in which organic waste water is subjected to a flocculation process and then a floating separation process.
- the floating separation device as the solid-liquid separation means has an advantage that a small installation space is sufficient as compared with the settling tank.
- An object of the present invention is to provide a water treatment method capable of efficiently performing flotation separation in a method of flotation separation treatment after coagulating the effluent.
- the water treatment method of the present invention includes a flocculation reaction step in which a flocculating agent is added to the water to be treated to perform a flocculation reaction, and a floating separation step in which the flocculated water that flows out of the flocculation reaction step is separated into solid and liquid.
- the flocculant is a cationic polymer flocculant having a hydrophobic functional group.
- the cationic polymer flocculant is obtained by polymerizing (i) a cationic monomer having a hydrophobic functional group, or (ii) at least a monomer having a hydrophobic functional group and a monomer having a cationic functional group. Are preferred.
- an inorganic flocculant may be further added.
- an anionic or nonionic polymer flocculant may be further added.
- a cationic polymer flocculant having a hydrophobic functional group is used as the flocculant in the method of flocculating and separating the waste water after flocculation. Since the cationic polymer flocculant having a hydrophobic functional group is cationic, it generally agglomerates the suspended substances in the waste water for charging which are generally negatively charged. Further, since the cationic polymer flocculant having a hydrophobic functional group has a hydrophobic functional group, the micro-air for the floating separation process is easily attached, and the floating separation process is efficiently performed.
- the addition of an inorganic flocculant, an anionic polymer flocculant or a nonionic polymer flocculant further improves the aggregation efficiency.
- a cationic polymer flocculant having a hydrophobic functional group it is sufficient that the amount of inorganic flocculant added is smaller than in the case of the conventional agglomeration treatment with an inorganic flocculant and a polymer flocculant. An effect can be obtained.
- Embodiments of the water treatment method of the present invention will be described in detail below.
- the water to be treated includes waste water such as river water, industrial water, well water such as well water, electronic industrial waste water, chemical factory waste water, and food factory waste water.
- waste water such as river water, industrial water, well water such as well water, electronic industrial waste water, chemical factory waste water, and food factory waste water.
- the wastewater may be organic wastewater biologically treated water.
- cationic polymer flocculant having a hydrophobic functional group examples include (1) and (2) below, but are not limited thereto.
- Polymer flocculant essentially comprising a cationic monomer having a hydrophobic functional group
- cationic monomers having a hydrophobic functional group include dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylamide, and diethylamino.
- methyl chloride salts such as ethyl (meth) acrylate, diethylaminopropyl (meth) acrylamide, N-methyl-N-ethylaminoethyl (meth) acrylate, and N-methyl-N-ethylaminopropyl (meth) acrylamide.
- Cationic polymer flocculants having hydrophobic functional groups are homopolymers or copolymers with copolymerizable vinyl monomers.
- hydrophobic monomer examples include N-methyl (N, N-dimethyl) acrylamide, acrylonitrile, styrene, methyl or ethyl (meth) acrylate. Etc.
- cationic monomer examples include cationic vinyl monomer, dimethylaminoethyl (meth) acrylate acid salt or quaternary ammonium salt thereof, dimethylaminopropyl (meth) acrylamide acid salt or quaternary ammonium salt thereof, diallyldimethyl Examples include ammonium chloride.
- both (1) and (2) may be those obtained by copolymerizing nonionic monomers.
- Nonionic monomers include (meth) acrylamide, N-isopropylacrylamide, N-methyl (N, N-dimethyl) acrylamide and the like.
- the polymerization method is not particularly limited, and known radical polymerization methods such as aqueous solution polymerization, solution polymerization, reverse phase suspension polymerization, photopolymerization, precipitation polymerization, and reverse phase emulsion polymerization can be applied.
- the weight average molecular weight of the cationic polymer flocculant having a hydrophobic functional group is preferably about 10 to 10 million, particularly about 3 to 10 million.
- an intrinsic viscosity using 1N-NaCl as a solvent is used as an index of molecular weight.
- an intrinsic viscosity using 0.1N-NaCl as a solvent can be used. In that case, it is preferable that it is 10 dl / g or more at 30 degreeC.
- the cation degree is preferably 10 mol% or more, particularly 10 to 100 mol%, particularly 50 to 100 mol% of the cationic monomer unit.
- the monomer unit of the cationic monomer having a hydrophobic functional group is preferably 10 mol% or more, particularly 10 to 100 mol%, particularly 50 to 100 mol%.
- the monomer unit of the hydrophobic monomer is preferably 10 mol% or more, particularly 10 to 80 mol%, particularly 30 to 80 mol%.
- the form of adding the polymer flocculant to the water to be treated is not particularly limited, but it is reactive when added in a solution dissolved in 0.05 to 1% by weight, particularly 0.1 to 0.5% by weight. Is preferable.
- the amount of the polymer flocculant added is preferably about 0.1 to 100 mg / L, particularly about 0.1 to 10 mg / L with respect to the water to be treated.
- An inorganic flocculant may be used in combination with the agglomeration treatment.
- the inorganic flocculant include iron flocculants such as ferric chloride and polyiron sulfate, aluminum flocculants such as aluminum sulfate, aluminum chloride, and polyaluminum chloride, calcium hydroxide, and magnesium hydroxide. Among these, iron-based or aluminum-based flocculants are preferable.
- These inorganic flocculants may be used individually by 1 type, and may use 2 or more types together.
- the inorganic flocculant may be added either before, after, or simultaneously with the addition of the cationic polymer flocculant having a hydrophobic functional group.
- the amount of the inorganic flocculant added is usually 1 to 2000 mg / L, preferably about 50 to 300 mg / L, although it depends on the properties and water quality of the water to be treated.
- an anionic polymer flocculant and a nonionic polymer flocculant may be used in combination according to the properties of the water to be treated, which may further improve the water quality of the agglomerated treated water and improve the pressure floatability.
- the anionic polymer flocculant include poly (meth) acrylic acid, a copolymer of (meth) acrylic acid and (meth) acrylamide, and anionic polymer flocculants such as alkali metal salts thereof. It is done.
- Nonionic polymer flocculants include nonionic organic polymer flocculants such as poly (meth) acrylamide.
- This anionic or nonionic polymer flocculant may be added either before, after or simultaneously with the addition of the cationic polymer flocculant having a hydrophobic functional group.
- the amount of the anionic or nonionic polymer flocculant added is preferably about 0.01 to 10 mg / L, particularly about 1 to 10 mg / L as a solid content.
- the pH during the coagulation treatment is preferably pH 4 to 10 in the coagulation tank, and the pH is adjusted as necessary.
- an acid such as hydrochloric acid (HCl) or sulfuric acid (H 2 SO 4 ) or an alkali such as sodium hydroxide (NaOH) is appropriately used.
- the flocculated water is then subjected to floating separation to separate the produced flocculated floc into solid and liquid.
- floating separation it is preferable that pressurized water in which air is dissolved under pressure is added to the agglomerated water and floated and separated in a floating tank.
- pressurized water in which air is dissolved under pressure is added to the agglomerated water and floated and separated in a floating tank.
- pressure levitation separation devices can be used for this pressure levitation separation.
- 1 and 2 are system diagrams showing an example of the waste water treatment apparatus of the present invention, wherein 1, 2 are agglomeration tank, and 3 is a pressurized flotation separation tank. Each aggregation tank is provided with a stirring means.
- the water to be treated is added with a cationic polymer flocculant having a hydrophobic functional group in the first flocculation tank 1, and then in the second flocculation tank 2, an inorganic flocculant (for example, iron-based flocculant). Agent) is added and subjected to flocculation treatment, and then the flocculated water is added to the pressurized floating separation tank 3 and floated and separated, the treated water is taken out from the lower part of the tank, and the levitated matter is taken out from the upper part of the tank.
- the pressurized water may be added before introduction into the floating separation tank 3.
- the apparatus shown in FIG. 2 is obtained by reversing the addition order of the cationic polymer flocculant having a hydrophobic functional group and the inorganic flocculant in FIG.
- the apparatus shown in FIGS. 1 and 2 is an example of the waste water treatment apparatus of the present invention, and the present invention is not limited to the illustrated method, and instead of the inorganic flocculant or together with the inorganic flocculant.
- An anionic or nonionic polymer flocculant may be added.
- the cationic polymer flocculating agent having a hydrophobic functional group the polymer of the benzyl chloride quaternary product of dimethylaminoethyl methacrylate DAM (B Z Cl) (Kurita Water Industries Ltd. Chestnut Farm PC797) was used.
- the polymer of dimethylaminoethyl methacrylate benzyl chloride quaternized product had an intrinsic viscosity of 12.5 dl / g at 0.1 N-NaCl, and the weight average molecular weight determined by GPC measurement was 9 million. .
- Example 1 and Comparative Example 1 According to the test flow shown in FIG. 3, the following simulated organic wastewater was subjected to biological treatment, and the raw water was used for coagulation pressure floating treatment.
- the biological treatment was a continuous treatment. Aggregation and pressure levitation treatment were batch treatment using a beaker and a column.
Abstract
Provided is a water treatment method, which performs floatation separation after flocculation of irrigation and drainage water, the method being capable of performing the floatation separation efficiently. A water treatment method provided with a flocculation reaction process for adding a flocculant to the water to be treated and performing a flocculation reaction and a floatation separation process for solid-liquid separation of the flocculated water flowing out of the flocculation reaction process. The method is characterized in that the flocculant is a cationic polymeric flocculant with hydrophobic functional groups. An inorganic flocculant or other polymeric flocculant can be used together with the cationic polymeric flocculant with hydrophobic functional groups.
Description
本発明は水処理方法に係り、特に、被処理水を凝集処理した後、浮上分離処理する水処理方法に関する。
The present invention relates to a water treatment method, and more particularly, to a water treatment method of subjecting water to be treated to a flocculation treatment and then a floating separation treatment.
河川水、工業用水、生物処理水など各種の用排水中の懸濁物質や溶解性物質等の汚染物質を除去するために、用排水を凝集処理した後、浮上分離処理する方法が広く行われている。例えば、特開平７－２４１５９７、特開２００２－１１３４７１、特開２００７－２０９８９０号公報には、有機性排水を凝集処理した後、浮上分離処理する方法が記載されている。固液分離手段としての浮上分離装置は沈殿槽に比べて設置スペースが小さくて足りる利点がある。
In order to remove pollutants such as suspended water and soluble substances in various effluents such as river water, industrial water, and biologically treated water, a method is widely used in which the effluent is coagulated and then floated and separated. ing. For example, JP-A-7-241597, JP-A-2002-113471, and JP-A-2007-209890 describe a method in which organic waste water is subjected to a flocculation process and then a floating separation process. The floating separation device as the solid-liquid separation means has an advantage that a small installation space is sufficient as compared with the settling tank.
本発明は、用排水を凝集処理した後、浮上分離処理する方法において、浮上分離を効率よく行うことができる水処理方法を提供することを目的とする。
An object of the present invention is to provide a water treatment method capable of efficiently performing flotation separation in a method of flotation separation treatment after coagulating the effluent.
本発明の水処理方法は、被処理水に凝集剤を添加して凝集反応を行う凝集反応工程と、該凝集反応工程から流出する凝集処理水を固液分離する浮上分離工程とを備えた水処理方法において、該凝集剤は、疎水性官能基を有するカチオン性高分子凝集剤であることを特徴とするものである。
The water treatment method of the present invention includes a flocculation reaction step in which a flocculating agent is added to the water to be treated to perform a flocculation reaction, and a floating separation step in which the flocculated water that flows out of the flocculation reaction step is separated into solid and liquid. In the treatment method, the flocculant is a cationic polymer flocculant having a hydrophobic functional group.
前記カチオン性高分子凝集剤は、（ｉ）疎水性官能基を有するカチオン性モノマー、又は（ii）少なくとも、疎水性官能基を有するモノマーと、カチオン性官能基を有するモノマーとを重合させて得られたものが好ましい。
The cationic polymer flocculant is obtained by polymerizing (i) a cationic monomer having a hydrophobic functional group, or (ii) at least a monomer having a hydrophobic functional group and a monomer having a cationic functional group. Are preferred.
前記凝集反応工程において、さらに無機凝集剤を添加してもよい。
In the agglomeration reaction step, an inorganic flocculant may be further added.
前記凝集反応工程において、さらにアニオン性又はノニオン性高分子凝集剤を添加してもよい。
In the agglutination reaction step, an anionic or nonionic polymer flocculant may be further added.
本発明では、用排水を凝集処理した後、浮上分離処理する方法において、凝集剤として疎水性官能基を有するカチオン性高分子凝集剤を用いる。この疎水性官能基を有するカチオン性高分子凝集剤は、カチオン性であるため、一般に負に帯電している用排水中の懸濁物質を効率よく凝集させる。また、この疎水性官能基を有するカチオン性高分子凝集剤は、疎水性官能基を有しているため、浮上分離処理用のマイクロエアーが付着し易く、浮上分離処理が効率よく行われる。
In the present invention, a cationic polymer flocculant having a hydrophobic functional group is used as the flocculant in the method of flocculating and separating the waste water after flocculation. Since the cationic polymer flocculant having a hydrophobic functional group is cationic, it generally agglomerates the suspended substances in the waste water for charging which are generally negatively charged. Further, since the cationic polymer flocculant having a hydrophobic functional group has a hydrophobic functional group, the micro-air for the floating separation process is easily attached, and the floating separation process is efficiently performed.
凝集反応工程において、無機凝集剤、アニオン性高分子凝集剤又はノニオン性高分子凝集剤を添加すると、凝集効率がさらに向上する。なお、疎水性官能基を有するカチオン性高分子凝集剤を用いることにより、従来の無機凝集剤と高分子凝集剤との凝集処理の場合に比べて無機凝集剤の添加量が少なくても十分な効果を得ることができる。
In the aggregation reaction step, the addition of an inorganic flocculant, an anionic polymer flocculant or a nonionic polymer flocculant further improves the aggregation efficiency. By using a cationic polymer flocculant having a hydrophobic functional group, it is sufficient that the amount of inorganic flocculant added is smaller than in the case of the conventional agglomeration treatment with an inorganic flocculant and a polymer flocculant. An effect can be obtained.
以下に本発明の水処理方法の実施の形態を詳細に説明する。
Embodiments of the water treatment method of the present invention will be described in detail below.
［被処理水］
本発明において、被処理水としては、河川水、工業用水、井水などの用水、電子産業排水、化学工場排水、食品工場排水などの排水が挙げられる。排水は、有機性排水の生物処理水であってもよい。 [Treatment water]
In the present invention, the water to be treated includes waste water such as river water, industrial water, well water such as well water, electronic industrial waste water, chemical factory waste water, and food factory waste water. The wastewater may be organic wastewater biologically treated water.
本発明において、被処理水としては、河川水、工業用水、井水などの用水、電子産業排水、化学工場排水、食品工場排水などの排水が挙げられる。排水は、有機性排水の生物処理水であってもよい。 [Treatment water]
In the present invention, the water to be treated includes waste water such as river water, industrial water, well water such as well water, electronic industrial waste water, chemical factory waste water, and food factory waste water. The wastewater may be organic wastewater biologically treated water.
［疎水性官能基を有するカチオン性高分子凝集剤］
疎水性官能基を有するカチオン性高分子凝集剤としては、次の（１），（２）が例示されるが、これらに限定されるものではない。 [Cationic polymer flocculant having a hydrophobic functional group]
Examples of the cationic polymer flocculant having a hydrophobic functional group include (1) and (2) below, but are not limited thereto.
疎水性官能基を有するカチオン性高分子凝集剤としては、次の（１），（２）が例示されるが、これらに限定されるものではない。 [Cationic polymer flocculant having a hydrophobic functional group]
Examples of the cationic polymer flocculant having a hydrophobic functional group include (1) and (2) below, but are not limited thereto.
（１） 疎水性官能基を有するカチオン性モノマーを必須とする高分子凝集剤
疎水性官能基を有するカチオン性モノマーとしては例えば、ジメチルアミノエチル（メタ）アクリレート、ジメチルアミノプロピル（メタ）アクリルアミド、ジエチルアミノエチル（メタ）アクリレート、ジエチルアミノプロピル（メタ）アクリルアミド、Ｎ－メチル－Ｎ－エチルアミノエチル（メタ）アクリレート及びＮ－メチル－Ｎ－エチルアミノプロピル（メタ）アクリルアミドなどのメチルクロライド塩等が挙げられる。疎水性官能基を有するカチオン性高分子凝集剤は、これらのホモポリマーもしくは共重合可能なビニルモノマーとのコポリマーである。 (1) Polymer flocculant essentially comprising a cationic monomer having a hydrophobic functional group Examples of cationic monomers having a hydrophobic functional group include dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylamide, and diethylamino. And methyl chloride salts such as ethyl (meth) acrylate, diethylaminopropyl (meth) acrylamide, N-methyl-N-ethylaminoethyl (meth) acrylate, and N-methyl-N-ethylaminopropyl (meth) acrylamide. Cationic polymer flocculants having hydrophobic functional groups are homopolymers or copolymers with copolymerizable vinyl monomers.
疎水性官能基を有するカチオン性モノマーとしては例えば、ジメチルアミノエチル（メタ）アクリレート、ジメチルアミノプロピル（メタ）アクリルアミド、ジエチルアミノエチル（メタ）アクリレート、ジエチルアミノプロピル（メタ）アクリルアミド、Ｎ－メチル－Ｎ－エチルアミノエチル（メタ）アクリレート及びＮ－メチル－Ｎ－エチルアミノプロピル（メタ）アクリルアミドなどのメチルクロライド塩等が挙げられる。疎水性官能基を有するカチオン性高分子凝集剤は、これらのホモポリマーもしくは共重合可能なビニルモノマーとのコポリマーである。 (1) Polymer flocculant essentially comprising a cationic monomer having a hydrophobic functional group Examples of cationic monomers having a hydrophobic functional group include dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylamide, and diethylamino. And methyl chloride salts such as ethyl (meth) acrylate, diethylaminopropyl (meth) acrylamide, N-methyl-N-ethylaminoethyl (meth) acrylate, and N-methyl-N-ethylaminopropyl (meth) acrylamide. Cationic polymer flocculants having hydrophobic functional groups are homopolymers or copolymers with copolymerizable vinyl monomers.
（２） 疎水性モノマーとカチオン性モノマーとを必須成分とする高分子凝集剤
疎水性モノマーとしては、例えばＮ－メチル（Ｎ，Ｎ－ジメチル）アクリルアミド、アクリロニトリル、スチレン、メチルもしくはエチル（メタ）アクリレート等が挙げられる。 (2) Polymer flocculant comprising hydrophobic monomer and cationic monomer as essential components Examples of the hydrophobic monomer include N-methyl (N, N-dimethyl) acrylamide, acrylonitrile, styrene, methyl or ethyl (meth) acrylate. Etc.
疎水性モノマーとしては、例えばＮ－メチル（Ｎ，Ｎ－ジメチル）アクリルアミド、アクリロニトリル、スチレン、メチルもしくはエチル（メタ）アクリレート等が挙げられる。 (2) Polymer flocculant comprising hydrophobic monomer and cationic monomer as essential components Examples of the hydrophobic monomer include N-methyl (N, N-dimethyl) acrylamide, acrylonitrile, styrene, methyl or ethyl (meth) acrylate. Etc.
カチオン性モノマーの具体例としては、カチオン性ビニルモノマー、ジメチルアミノエチル（メタ）アクリレートの酸塩もしくはその４級アンモニウム塩、ジメチルアミノプロピル（メタ）アクリルアミドの酸塩もしくはその４級アンモニウム塩、ジアリルジメチルアンモニウムクロリド等が挙げられる。
Specific examples of the cationic monomer include cationic vinyl monomer, dimethylaminoethyl (meth) acrylate acid salt or quaternary ammonium salt thereof, dimethylaminopropyl (meth) acrylamide acid salt or quaternary ammonium salt thereof, diallyldimethyl Examples include ammonium chloride.
なお、（１），（２）ともに、ノニオン性モノマーを共重合させたものであってもよい。ノニオン性モノマーとしては、（メタ）アクリルアミド、Ｎ－イソプロピルアクリルアミド、Ｎ－メチル（Ｎ，Ｎ－ジメチル）アクリルアミド等が挙げられる。
Incidentally, both (1) and (2) may be those obtained by copolymerizing nonionic monomers. Nonionic monomers include (meth) acrylamide, N-isopropylacrylamide, N-methyl (N, N-dimethyl) acrylamide and the like.
重合方法としては、特に限定はなく、公知のラジカル重合法、例えば水溶液重合、溶液重合、逆相懸濁重合、光重合、沈殿重合および逆相乳化重合が適用できる。
The polymerization method is not particularly limited, and known radical polymerization methods such as aqueous solution polymerization, solution polymerization, reverse phase suspension polymerization, photopolymerization, precipitation polymerization, and reverse phase emulsion polymerization can be applied.
＜疎水性官能基を有するカチオン性高分子凝集剤のポリマー物性＞
疎水性官能基を有するカチオン性高分子凝集剤の重量平均分子量は１０００～１０００万特に３００万～１０００万程度が好ましい。通常、分子量の指標として１Ｎ－ＮａＣｌを溶媒とした固有粘度を用いる。しかし、疎水性官能基を有するポリマーは１Ｎ－ＮａＣｌ中では析出するため、０．１Ｎ－ＮａＣｌを溶媒とした固有粘度を用いることができる。その場合、３０℃で１０ｄｌ／ｇ以上であることが好ましい。 <Polymer physical properties of cationic polymer flocculant having hydrophobic functional group>
The weight average molecular weight of the cationic polymer flocculant having a hydrophobic functional group is preferably about 10 to 10 million, particularly about 3 to 10 million. Usually, an intrinsic viscosity using 1N-NaCl as a solvent is used as an index of molecular weight. However, since a polymer having a hydrophobic functional group precipitates in 1N-NaCl, an intrinsic viscosity using 0.1N-NaCl as a solvent can be used. In that case, it is preferable that it is 10 dl / g or more at 30 degreeC.
疎水性官能基を有するカチオン性高分子凝集剤の重量平均分子量は１０００～１０００万特に３００万～１０００万程度が好ましい。通常、分子量の指標として１Ｎ－ＮａＣｌを溶媒とした固有粘度を用いる。しかし、疎水性官能基を有するポリマーは１Ｎ－ＮａＣｌ中では析出するため、０．１Ｎ－ＮａＣｌを溶媒とした固有粘度を用いることができる。その場合、３０℃で１０ｄｌ／ｇ以上であることが好ましい。 <Polymer physical properties of cationic polymer flocculant having hydrophobic functional group>
The weight average molecular weight of the cationic polymer flocculant having a hydrophobic functional group is preferably about 10 to 10 million, particularly about 3 to 10 million. Usually, an intrinsic viscosity using 1N-NaCl as a solvent is used as an index of molecular weight. However, since a polymer having a hydrophobic functional group precipitates in 1N-NaCl, an intrinsic viscosity using 0.1N-NaCl as a solvent can be used. In that case, it is preferable that it is 10 dl / g or more at 30 degreeC.
カチオン度としては、カチオン性モノマー単位が１０モル％以上特に１０～１００モル％とりわけ５０～１００モル％が好ましい。１０モル％を下回るとカチオン性が足りず凝集効果が低下する。疎水性官能基を有するカチオン性モノマーのモノマー単位は、１０モル％以上特に１０～１００モル％とりわけ５０～１００モル％が好ましい。疎水性モノマーのモノマー単位は、１０モル％以上特に１０～８０モル％とりわけ３０～８０モル％が好ましい。
The cation degree is preferably 10 mol% or more, particularly 10 to 100 mol%, particularly 50 to 100 mol% of the cationic monomer unit. When the amount is less than 10 mol%, the cationic effect is insufficient and the aggregation effect is lowered. The monomer unit of the cationic monomer having a hydrophobic functional group is preferably 10 mol% or more, particularly 10 to 100 mol%, particularly 50 to 100 mol%. The monomer unit of the hydrophobic monomer is preferably 10 mol% or more, particularly 10 to 80 mol%, particularly 30 to 80 mol%.
＜疎水性官能基を有するカチオン性高分子凝集剤の製品形態＞
粉末状でも逆相エマルションまたはサスペンション状の分散液でもよく、形態は限定されない。 <Product form of cationic polymer flocculant having hydrophobic functional group>
It may be a powder or a reverse emulsion or a suspension dispersion, and the form is not limited.
粉末状でも逆相エマルションまたはサスペンション状の分散液でもよく、形態は限定されない。 <Product form of cationic polymer flocculant having hydrophobic functional group>
It may be a powder or a reverse emulsion or a suspension dispersion, and the form is not limited.
＜疎水性官能基を有するカチオン性高分子凝集剤の添加方法＞
この高分子凝集剤を被処理水に添加する形態に特に限定はないが、０．０５～１重量％特に０．１～０．５重量％に溶解した液で添加するのが反応性の点で好ましい。 <Method for adding cationic polymer flocculant having hydrophobic functional group>
The form of adding the polymer flocculant to the water to be treated is not particularly limited, but it is reactive when added in a solution dissolved in 0.05 to 1% by weight, particularly 0.1 to 0.5% by weight. Is preferable.
この高分子凝集剤を被処理水に添加する形態に特に限定はないが、０．０５～１重量％特に０．１～０．５重量％に溶解した液で添加するのが反応性の点で好ましい。 <Method for adding cationic polymer flocculant having hydrophobic functional group>
The form of adding the polymer flocculant to the water to be treated is not particularly limited, but it is reactive when added in a solution dissolved in 0.05 to 1% by weight, particularly 0.1 to 0.5% by weight. Is preferable.
＜疎水性官能基を有するカチオン性高分子凝集剤の添加量＞
この高分子凝集剤の添加量は、被処理水に対して０．１～１００ｍｇ／Ｌ、特に０．１～１０ｍｇ／Ｌ程度が好ましい。 <Addition amount of cationic polymer flocculant having hydrophobic functional group>
The amount of the polymer flocculant added is preferably about 0.1 to 100 mg / L, particularly about 0.1 to 10 mg / L with respect to the water to be treated.
この高分子凝集剤の添加量は、被処理水に対して０．１～１００ｍｇ／Ｌ、特に０．１～１０ｍｇ／Ｌ程度が好ましい。 <Addition amount of cationic polymer flocculant having hydrophobic functional group>
The amount of the polymer flocculant added is preferably about 0.1 to 100 mg / L, particularly about 0.1 to 10 mg / L with respect to the water to be treated.
［その他の凝集剤］
凝集処理にさらに無機凝集剤を併用してもよい。無機凝集剤としては、塩化第二鉄、ポリ硫酸鉄などの鉄系凝集剤、硫酸アルミニウム、塩化アルミニウム、ポリ塩化アルミニウム等のアルミニウム系凝集剤、水酸化カルシウム、水酸化マグネシウムが例示されるが、これらのうちでも鉄系又はアルミニウム系凝集剤が好ましい。これらの無機凝集剤は、１種を単独で用いても良く、２種以上を併用しても良い。無機凝集剤は、疎水性官能基を有するカチオン性高分子凝集剤の添加の前、後、同時のいずれで添加されてもよい。 [Other flocculants]
An inorganic flocculant may be used in combination with the agglomeration treatment. Examples of the inorganic flocculant include iron flocculants such as ferric chloride and polyiron sulfate, aluminum flocculants such as aluminum sulfate, aluminum chloride, and polyaluminum chloride, calcium hydroxide, and magnesium hydroxide. Among these, iron-based or aluminum-based flocculants are preferable. These inorganic flocculants may be used individually by 1 type, and may use 2 or more types together. The inorganic flocculant may be added either before, after, or simultaneously with the addition of the cationic polymer flocculant having a hydrophobic functional group.
凝集処理にさらに無機凝集剤を併用してもよい。無機凝集剤としては、塩化第二鉄、ポリ硫酸鉄などの鉄系凝集剤、硫酸アルミニウム、塩化アルミニウム、ポリ塩化アルミニウム等のアルミニウム系凝集剤、水酸化カルシウム、水酸化マグネシウムが例示されるが、これらのうちでも鉄系又はアルミニウム系凝集剤が好ましい。これらの無機凝集剤は、１種を単独で用いても良く、２種以上を併用しても良い。無機凝集剤は、疎水性官能基を有するカチオン性高分子凝集剤の添加の前、後、同時のいずれで添加されてもよい。 [Other flocculants]
An inorganic flocculant may be used in combination with the agglomeration treatment. Examples of the inorganic flocculant include iron flocculants such as ferric chloride and polyiron sulfate, aluminum flocculants such as aluminum sulfate, aluminum chloride, and polyaluminum chloride, calcium hydroxide, and magnesium hydroxide. Among these, iron-based or aluminum-based flocculants are preferable. These inorganic flocculants may be used individually by 1 type, and may use 2 or more types together. The inorganic flocculant may be added either before, after, or simultaneously with the addition of the cationic polymer flocculant having a hydrophobic functional group.
無機凝集剤の添加量は、被処理水の性状や水質にもよるが、通常１～２０００ｍｇ／Ｌ特に５０～３００ｍｇ／Ｌ程度とすることが好ましい。
The amount of the inorganic flocculant added is usually 1 to 2000 mg / L, preferably about 50 to 300 mg / L, although it depends on the properties and water quality of the water to be treated.
また、被処理水の性状に応じてアニオン性高分子凝集剤、ノニオン性高分子凝集剤を併用することでさらに凝集処理水の水質向上や加圧浮上分離性の向上効果が得られることがある。アニオン性高分子凝集剤としては、例えば、ポリ（メタ）アクリル酸、（メタ）アクリル酸と（メタ）アクリルアミドの共重合物、及び、それらのアルカリ金属塩等のアニオン系高分子凝集剤が挙げられる。ノニオン性高分子凝集剤としては、ポリ（メタ）アクリルアミド等のノニオン系の有機系高分子凝集剤などが例示される。
In addition, an anionic polymer flocculant and a nonionic polymer flocculant may be used in combination according to the properties of the water to be treated, which may further improve the water quality of the agglomerated treated water and improve the pressure floatability. . Examples of the anionic polymer flocculant include poly (meth) acrylic acid, a copolymer of (meth) acrylic acid and (meth) acrylamide, and anionic polymer flocculants such as alkali metal salts thereof. It is done. Nonionic polymer flocculants include nonionic organic polymer flocculants such as poly (meth) acrylamide.
このアニオン性又はノニオン性高分子凝集剤は、疎水性官能基を有するカチオン性高分子凝集剤の添加の前、後、同時のいずれで添加されてもよい。アニオン性又はノニオン性高分子凝集剤の添加量は、通常の場合、固形分として０．０１～１０ｍｇ／Ｌ特に１～１０ｍｇ／Ｌ程度とすることが好ましい。
This anionic or nonionic polymer flocculant may be added either before, after or simultaneously with the addition of the cationic polymer flocculant having a hydrophobic functional group. In general, the amount of the anionic or nonionic polymer flocculant added is preferably about 0.01 to 10 mg / L, particularly about 1 to 10 mg / L as a solid content.
＜ｐＨ調整＞
凝集処理時のｐＨは、凝集槽において、ｐＨ４～１０であることが好ましく、必要に応じｐＨ調整する。ｐＨ調整には塩酸（ＨＣｌ）、硫酸（Ｈ２ＳＯ４）等の酸や、水酸化ナトリウム（ＮａＯＨ）等のアルカリが適宜用いられる。 <PH adjustment>
The pH during the coagulation treatment is preferably pH 4 to 10 in the coagulation tank, and the pH is adjusted as necessary. For pH adjustment, an acid such as hydrochloric acid (HCl) or sulfuric acid (H 2 SO 4 ) or an alkali such as sodium hydroxide (NaOH) is appropriately used.
凝集処理時のｐＨは、凝集槽において、ｐＨ４～１０であることが好ましく、必要に応じｐＨ調整する。ｐＨ調整には塩酸（ＨＣｌ）、硫酸（Ｈ２ＳＯ４）等の酸や、水酸化ナトリウム（ＮａＯＨ）等のアルカリが適宜用いられる。 <PH adjustment>
The pH during the coagulation treatment is preferably pH 4 to 10 in the coagulation tank, and the pH is adjusted as necessary. For pH adjustment, an acid such as hydrochloric acid (HCl) or sulfuric acid (H 2 SO 4 ) or an alkali such as sodium hydroxide (NaOH) is appropriately used.
［浮上分離］
凝集処理水は次いで浮上分離を行って、生成した凝集フロックを固液分離する。この浮上分離を行うには、空気を加圧溶解させた加圧水を凝集処理水に添加し、浮上槽にて浮上分離するのが好ましい。この加圧浮上分離には各種の加圧浮上分離装置を用いることができる。 [Floating separation]
The flocculated water is then subjected to floating separation to separate the produced flocculated floc into solid and liquid. In order to perform this floating separation, it is preferable that pressurized water in which air is dissolved under pressure is added to the agglomerated water and floated and separated in a floating tank. Various types of pressure levitation separation devices can be used for this pressure levitation separation.
凝集処理水は次いで浮上分離を行って、生成した凝集フロックを固液分離する。この浮上分離を行うには、空気を加圧溶解させた加圧水を凝集処理水に添加し、浮上槽にて浮上分離するのが好ましい。この加圧浮上分離には各種の加圧浮上分離装置を用いることができる。 [Floating separation]
The flocculated water is then subjected to floating separation to separate the produced flocculated floc into solid and liquid. In order to perform this floating separation, it is preferable that pressurized water in which air is dissolved under pressure is added to the agglomerated water and floated and separated in a floating tank. Various types of pressure levitation separation devices can be used for this pressure levitation separation.
［その他の処理］
更に、本発明では、加圧浮上分離装置の後段で、上記以外のその他の処理を併用しても良い。例えば、残留溶解性有機物を除去するために、活性炭処理や膜分離処理を行っても良い。 [Other processing]
Furthermore, in this invention, you may use together other processes other than the above in the back | latter stage of a pressurization floating separator. For example, activated carbon treatment or membrane separation treatment may be performed in order to remove residual soluble organic substances.
更に、本発明では、加圧浮上分離装置の後段で、上記以外のその他の処理を併用しても良い。例えば、残留溶解性有機物を除去するために、活性炭処理や膜分離処理を行っても良い。 [Other processing]
Furthermore, in this invention, you may use together other processes other than the above in the back | latter stage of a pressurization floating separator. For example, activated carbon treatment or membrane separation treatment may be performed in order to remove residual soluble organic substances.
［処理装置］
以下に図面を参照して本発明の排水処理装置の一例を説明する。 [Processing equipment]
An example of the waste water treatment apparatus of the present invention will be described below with reference to the drawings.
以下に図面を参照して本発明の排水処理装置の一例を説明する。 [Processing equipment]
An example of the waste water treatment apparatus of the present invention will be described below with reference to the drawings.
図１，２は、本発明の排水処理装置の一例を示す系統図であり、１，２は凝集槽、３は加圧浮上分離槽を示す。各凝集槽には撹拌手段が設けられている。
1 and 2 are system diagrams showing an example of the waste water treatment apparatus of the present invention, wherein 1, 2 are agglomeration tank, and 3 is a pressurized flotation separation tank. Each aggregation tank is provided with a stirring means.
図１の排水処理装置においては、被処理水は第１凝集槽１において疎水性官能基を有するカチオン性高分子凝集剤が添加され、次いで第２凝集槽２において無機凝集剤（例えば鉄系凝集剤）が添加されて凝集処理され、凝集処理水は次いで加圧浮上分離槽３で加圧水が添加され、浮上分離され、処理水は槽下部から取り出され、浮上物は槽上部から取り出される。加圧水は、浮上分離槽３への導入前に添加されてもよい。
In the wastewater treatment apparatus of FIG. 1, the water to be treated is added with a cationic polymer flocculant having a hydrophobic functional group in the first flocculation tank 1, and then in the second flocculation tank 2, an inorganic flocculant (for example, iron-based flocculant). Agent) is added and subjected to flocculation treatment, and then the flocculated water is added to the pressurized floating separation tank 3 and floated and separated, the treated water is taken out from the lower part of the tank, and the levitated matter is taken out from the upper part of the tank. The pressurized water may be added before introduction into the floating separation tank 3.
図２に示す装置は、図１において、疎水性官能基を有するカチオン性高分子凝集剤と無機凝集剤との添加順序を逆にしたものである。
The apparatus shown in FIG. 2 is obtained by reversing the addition order of the cationic polymer flocculant having a hydrophobic functional group and the inorganic flocculant in FIG.
なお、図１，２に示す装置は、本発明の排水処理装置の一例であって、本発明は何ら図示の方法に限定されるものではなく、無機凝集剤の代わりに、又は無機凝集剤と共にアニオン性又はノニオン性高分子凝集剤を添加してもよい。
The apparatus shown in FIGS. 1 and 2 is an example of the waste water treatment apparatus of the present invention, and the present invention is not limited to the illustrated method, and instead of the inorganic flocculant or together with the inorganic flocculant. An anionic or nonionic polymer flocculant may be added.
以下に実施例及び比較例を挙げて本発明をより具体的に説明する。なお、以下の実施例では、疎水性官能基を有するカチオン性高分子凝集剤として、ジメチルアミノエチルメタクリレートの塩化ベンジル４級化物ＤＡＭ（ＢＺＣｌ）の重合体（栗田工業（株）製クリファームＰＣ７９７）を用いた。なお、このジメチルアミノエチルメタクリレートの塩化ベンジル４級化物の重合体は、０．１Ｎ－ＮａＣｌでの固有粘度が１２．５ｄｌ／ｇであり、ＧＰＣ測定により求めた重量平均分子量は９００万であった。
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. In the following description of the embodiments, as the cationic polymer flocculating agent having a hydrophobic functional group, the polymer of the benzyl chloride quaternary product of dimethylaminoethyl methacrylate DAM (B Z Cl) (Kurita Water Industries Ltd. Chestnut Farm PC797) was used. The polymer of dimethylaminoethyl methacrylate benzyl chloride quaternized product had an intrinsic viscosity of 12.5 dl / g at 0.1 N-NaCl, and the weight average molecular weight determined by GPC measurement was 9 million. .
［実施例１及び比較例１］
図３に示す試験フローにより、下記模擬有機排水を生物処理を行ったものを原水とし、凝集加圧浮上処理を行った。生物処理は連続処理とした。凝集と加圧浮上処理はビーカーおよびカラムを用いたバッチ処理とした。
［模擬排水］
ＢＯＤ：２０ｍｇ／Ｌ（グルコースと酢酸混合水）
［生物処理］
スポンジ担体式流動床
反応槽：１０Ｌ
滞留時間：１時間
［原水（生物処理水）］
ＢＯＤ：＜５ｍｇ／Ｌ
ＳＳ：１０ｍｇ／Ｌ
濁度：３．８度
［凝集１ 凝集条件］
１Ｌビーカーでのバッチ式凝集
無機凝集剤（３８％塩化第二鉄）：１００ｍｇ／Ｌ
疎水性カチオンポリマー添加量：０．２ｍｇ／Ｌ（実施例１で添加。比較例１では添加せず。）
反応時間：５分
ｐＨ：５．５
［凝集２ 凝集条件］
１Ｌビーカーでのバッチ式凝集
アニオンポリマー：アクリルアミド系ポリマー 栗田工業（株）製クリフロックＰＡ３３１
アニオンポリマー添加量：０．５ｍｇ／Ｌ
反応時間：３分
ｐＨ：５．５
［加圧浮上］
１Ｌカラムでのバッチ式加圧浮上。加圧水は純水を用いた。
加圧圧力：０．３５ＭＰａ
加圧水量比：２０％
［処理指標］
加圧浮上処理の性能向上評価を発生スカムの浮上速度とスカム強度、また処理水の濁度で評価した。結果を表１に示す。 [Example 1 and Comparative Example 1]
According to the test flow shown in FIG. 3, the following simulated organic wastewater was subjected to biological treatment, and the raw water was used for coagulation pressure floating treatment. The biological treatment was a continuous treatment. Aggregation and pressure levitation treatment were batch treatment using a beaker and a column.
[Simulated drainage]
BOD: 20 mg / L (mixed water of glucose and acetic acid)
[Biological treatment]
Sponge carrier type fluidized bed reaction tank: 10L
Residence time: 1 hour [Raw water (biologically treated water)]
BOD: <5mg / L
SS: 10 mg / L
Turbidity: 3.8 degrees [Aggregation 1 Aggregation Conditions]
Batch type agglomeration in 1 L beaker Inorganic flocculant (38% ferric chloride): 100 mg / L
Hydrophobic cationic polymer addition amount: 0.2 mg / L (added in Example 1. not added in Comparative Example 1)
Reaction time: 5 minutes pH: 5.5
[Aggregation 2 Aggregation Conditions]
Batch type agglomeration in 1L beaker Anionic polymer: Acrylamide polymer Cliff Rock PA331 manufactured by Kurita Kogyo Co., Ltd.
Anionic polymer addition amount: 0.5 mg / L
Reaction time: 3 minutes pH: 5.5
[Pressure levitation]
Batch type pressure levitation on 1L column. Pure water was used as the pressurized water.
Pressurized pressure: 0.35 MPa
Pressurized water ratio: 20%
[Processing index]
The performance improvement evaluation of pressurized levitation treatment was evaluated by the levitation speed and scum strength of the generated scum and the turbidity of the treated water. The results are shown in Table 1.
図３に示す試験フローにより、下記模擬有機排水を生物処理を行ったものを原水とし、凝集加圧浮上処理を行った。生物処理は連続処理とした。凝集と加圧浮上処理はビーカーおよびカラムを用いたバッチ処理とした。
［模擬排水］
ＢＯＤ：２０ｍｇ／Ｌ（グルコースと酢酸混合水）
［生物処理］
スポンジ担体式流動床
反応槽：１０Ｌ
滞留時間：１時間
［原水（生物処理水）］
ＢＯＤ：＜５ｍｇ／Ｌ
ＳＳ：１０ｍｇ／Ｌ
濁度：３．８度
［凝集１ 凝集条件］
１Ｌビーカーでのバッチ式凝集
無機凝集剤（３８％塩化第二鉄）：１００ｍｇ／Ｌ
疎水性カチオンポリマー添加量：０．２ｍｇ／Ｌ（実施例１で添加。比較例１では添加せず。）
反応時間：５分
ｐＨ：５．５
［凝集２ 凝集条件］
１Ｌビーカーでのバッチ式凝集
アニオンポリマー：アクリルアミド系ポリマー 栗田工業（株）製クリフロックＰＡ３３１
アニオンポリマー添加量：０．５ｍｇ／Ｌ
反応時間：３分
ｐＨ：５．５
［加圧浮上］
１Ｌカラムでのバッチ式加圧浮上。加圧水は純水を用いた。
加圧圧力：０．３５ＭＰａ
加圧水量比：２０％
［処理指標］
加圧浮上処理の性能向上評価を発生スカムの浮上速度とスカム強度、また処理水の濁度で評価した。結果を表１に示す。 [Example 1 and Comparative Example 1]
According to the test flow shown in FIG. 3, the following simulated organic wastewater was subjected to biological treatment, and the raw water was used for coagulation pressure floating treatment. The biological treatment was a continuous treatment. Aggregation and pressure levitation treatment were batch treatment using a beaker and a column.
[Simulated drainage]
BOD: 20 mg / L (mixed water of glucose and acetic acid)
[Biological treatment]
Sponge carrier type fluidized bed reaction tank: 10L
Residence time: 1 hour [Raw water (biologically treated water)]
BOD: <5mg / L
SS: 10 mg / L
Turbidity: 3.8 degrees [
Batch type agglomeration in 1 L beaker Inorganic flocculant (38% ferric chloride): 100 mg / L
Hydrophobic cationic polymer addition amount: 0.2 mg / L (added in Example 1. not added in Comparative Example 1)
Reaction time: 5 minutes pH: 5.5
[Aggregation 2 Aggregation Conditions]
Batch type agglomeration in 1L beaker Anionic polymer: Acrylamide polymer Cliff Rock PA331 manufactured by Kurita Kogyo Co., Ltd.
Anionic polymer addition amount: 0.5 mg / L
Reaction time: 3 minutes pH: 5.5
[Pressure levitation]
Batch type pressure levitation on 1L column. Pure water was used as the pressurized water.
Pressurized pressure: 0.35 MPa
Pressurized water ratio: 20%
[Processing index]
The performance improvement evaluation of pressurized levitation treatment was evaluated by the levitation speed and scum strength of the generated scum and the turbidity of the treated water. The results are shown in Table 1.
表１の通り、本発明によると効率よく浮上分離処理が行われ、処理水の水質も良好になることが認められる。
As shown in Table 1, according to the present invention, it is recognized that the flotation separation process is performed efficiently and the quality of the treated water is also improved.
本発明を特定の態様を用いて詳細に説明したが、本発明の意図と範囲を離れることなく様々な変更が可能であることは当業者に明らかである。
なお、本出願は、２０１２年３月２７日付で出願された日本特許出願（特願２０１２－０７１８０９）に基づいており、その全体が引用により援用される。 Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on a Japanese patent application filed on March 27, 2012 (Japanese Patent Application No. 2012-071809), which is incorporated by reference in its entirety.
なお、本出願は、２０１２年３月２７日付で出願された日本特許出願（特願２０１２－０７１８０９）に基づいており、その全体が引用により援用される。 Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.
This application is based on a Japanese patent application filed on March 27, 2012 (Japanese Patent Application No. 2012-071809), which is incorporated by reference in its entirety.
Claims (4)
- 被処理水に凝集剤を添加して凝集反応を行う凝集反応工程と、
該凝集反応工程から流出する凝集処理水を固液分離する浮上分離工程と
を備えた水処理方法において、
該凝集剤は、疎水性官能基を有するカチオン性高分子凝集剤であることを特徴とする水処理方法。 An agglutination reaction step of adding an aggregating agent to the water to be treated and performing an agglutination reaction;
In a water treatment method comprising a flotation separation step for solid-liquid separation of the agglomerated treated water flowing out from the agglomeration reaction step,
The water treatment method, wherein the flocculant is a cationic polymer flocculant having a hydrophobic functional group. - 請求項１において、前記カチオン性高分子凝集剤は、疎水性官能基を有するカチオン性ポリマーであるか、又は少なくとも、疎水性官能基を有するモノマーと、カチオン性官能基を有するモノマーとを重合させて得られたものであることを特徴とする水処理方法。 2. The cationic polymer flocculant according to claim 1, wherein the cationic polymer flocculant is a cationic polymer having a hydrophobic functional group, or at least a monomer having a hydrophobic functional group and a monomer having a cationic functional group are polymerized. The water treatment method characterized by the above-mentioned.
- 請求項１又は２において、前記凝集反応工程において、さらに無機凝集剤を添加することを特徴とする水処理方法。 3. The water treatment method according to claim 1, wherein an inorganic flocculant is further added in the aggregation reaction step.
- 請求項１ないし３のいずれか１項において、前記凝集反応工程において、さらにアニオン性又はノニオン性高分子凝集剤を添加することを特徴とする水処理方法。 The water treatment method according to any one of claims 1 to 3, wherein an anionic or nonionic polymer flocculant is further added in the aggregation reaction step.
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| CN105645543A (en) * | 2016-03-08 | 2016-06-08 | 佛山市聚成生化技术研发有限公司 | Polysilicate aluminum ferric flocculant and preparation method thereof |
| JP2019037957A (en) * | 2017-08-28 | 2019-03-14 | 水ｉｎｇ株式会社 | Water treatment method, and water treatment apparatus |
| JP2019188337A (en) * | 2018-04-25 | 2019-10-31 | 栗田工業株式会社 | Water treatment method and water treatment apparatus |
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| WO2019208532A1 (en) * | 2018-04-25 | 2019-10-31 | 栗田工業株式会社 | Water treatment method and water treatment apparatus |
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