JP3218578B2 - Organic sludge dehydrating agent, method for treating organic sludge, and method for producing organic sludge dehydrating agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dehydrating agent for organic sludge,
The present invention relates to a method for treating organic sludge and a method for producing a dehydrating agent for organic sludge, and more particularly to municipal sewage, human waste,
When coagulating organic sludge such as raw sludge of general industrial wastewater, excess sludge, coagulated sludge, digested sludge, or the above-mentioned sludge that has been pretreated with an inorganic coagulant, or a decanter, belt press, filter press, The present invention relates to a dehydrating agent added when dehydrating with a screw press dehydrator or the like, a method for treating the organic sludge, and a method for producing a dehydrating agent for the organic sludge.

[0002]

2. Description of the Related Art Conventionally, cationic polymer flocculants have been used for coagulation and dewatering of raw sludge, excess sludge, coagulated sludge, digested sludge or mixed sludge of municipal sewage, human waste, and general industrial wastewater. However, in recent years, due to the increase in sludge generation and the deterioration of sludge properties, the use of a cationic polymer flocculant alone does not increase the sludge treatment amount, and furthermore, the water content of the dewatered cake, the SS recovery rate, and the cake The releasability from the filter cloth and the like are not always satisfactory, and improvements have been demanded.

In order to remedy the disadvantages of conventional cationic polymer flocculants, crosslinked cationic, anionic and nonionic organic polymer compositions have been proposed (European Patent 0,202, 780, JP-A-61-293510, JP-A-64-85199
JP, JP-A-2-21987, JP-A-4-2
No. 26102), which is known to be effective for various solid-liquid separations, particularly for aggregation of a dispersion of a suspended solid. However, these dehydrating agents have a drawback that they are ineffective only at high doses. From the viewpoints of recent environmental pollution and an increase in the cost of materials, a dehydrating agent capable of high-separation at a low dose is strongly desired.

[0004]

SUMMARY OF THE INVENTION A first object of the present invention is to provide raw sludge from municipal sewage, human waste, and general industrial wastewater, excess sludge, coagulated sludge, digested sludge, or sludge that has been pretreated with an inorganic coagulant. The present invention provides a dehydrating agent that can be used when coagulating organic sludge such as these mixed sludges, or when dewatering with a decanter, belt press, filter press, screw press dehydrator, or the like. An object is to provide a method for treating the organic sludge, and a third object of the present invention is to provide a method for producing a dehydrating agent for the organic sludge.

[0005]

DISCLOSURE OF THE INVENTION The present inventors have conducted intensive studies to develop a dehydrating agent for organic sludge having excellent coagulation and dehydration performance. As a result, a bifunctional monomer and a water-soluble cationic vinyl monomer have been developed. A polymer having a network structure and a controlled molecular weight, obtained by subjecting a monomer containing a water-soluble anionic vinyl monomer to reverse phase emulsion polymerization in the presence of a chain transfer agent, and a hydrophilic surfactant It has been found that the first object can be solved by a dehydrating agent composed of a mixture of agents, and a diluting solution of this dehydrating agent in water is added to organic sludge and agglomerated by stirring, and the agglomerated sludge is dehydrated by a dehydrator. It is found that the second purpose can be solved by doing
Functional monomer and water-soluble cationic vinyl monomer and water
After performing a polymerization operation after mixing and strongly stirring monomer components including a soluble anionic vinyl monomer to form fine monomer phase droplets in the oil phase, the hydrophilic surfactant is used. It has been found that the third object can be solved by mixing the compounds, and the present invention has been achieved.

[0006] The invention of claim 1 of the present invention, (A) on total monomer
Represented by the following formula (1) in an amount of 5 to 97.9999 mol% in the body
A water-soluble cationic vinyl monomer or a mixture thereof,
(B) 0.0001 to 0.01 mol% of all monomers
Functional monomer, (C) nonionic water added as needed
Soluble monomer, (D) chain transfer agent, (E) water, (F)
An oil consisting of at least one hydrocarbon, (G)
To produce a marsion, a water-in-oil emulsion
At least one surfactant that is an effective amount and HLB
And (H) 2-30 mol% of water-soluble anio in all monomers
Prepare a vinyl monomer or its mixture
The components (A) to (H) are mixed and stirred vigorously as appropriate, and finely divided in the oil phase.
After the monomer phase droplets are formed, polymerization
A mixture of a reversed-phase emulsion polymer and a hydrophilic surfactant,
When diluted with water to the concentration to be added to the sludge, a particle size of 30
particles having a particle size of μm or less are observed under a microscope, and the diluted liquid is applied to a glass plate and dried at 105 ° C. to form a continuous dried film. Agent.

[0007]

Embedded image (Where A is O or NH; B is C ₂ H ₄ , C ₃
H ₆ , C ₃ H ₅ OH; R ₁ is H or CH ₃ ; R ₂ , R
₃ represents an alkyl group having 1 to 4 carbon atoms; R ₄ represents hydrogen or an alkyl group having 1 to 4 carbon atoms or a benzyl group; X ⁻ represents an anionic counter ion. )

According to a second aspect of the present invention, a diluting solution of the organic sludge dehydrating agent according to the first aspect of the present invention with water is added to the organic sludge, the mixture is stirred, and the organic sludge is aggregated, and the organic sludge is aggregated by a dehydrator. This is a method for treating organic sludge, comprising dewatering sludge.

The invention of claim 3 of the present invention relates to (A) a water-soluble cationic vinyl monomer represented by the following formula (1) or a mixture thereof in an amount of 5 to 99.9999 mol% of all monomers;
(B) 0.0001 to 0.01 mol% of a bifunctional monomer in all monomers, (C) a nonionic water-soluble monomer added as needed , (D) a chain transfer agent, E) water, (F) an oil comprising at least one hydrocarbon, and (G) at least one surfactant which is an HLB in an amount effective to produce a reverse emulsion or water-in-oil emulsion; and H) 2-30 mol% of water-soluble a
A nonionic vinyl monomer or a mixture thereof is prepared, and the above components (A) to (H) are mixed and stirred vigorously as needed to form fine monomer phase droplets in an oil phase, and then a polymerization operation is performed. A method for producing a dehydrating agent for organic sludge, comprising mixing a hydrophilic surfactant and diluting with water.

[0010]

Embedded image (Where A is O or NH; B is C ₂ H ₄ , C ₃
H ₆ , C ₃ H ₅ OH; R ₁ is H or CH ₃ ; R ₂ , R
₃ represents an alkyl group having 1 to 4 carbon atoms; R ₄ represents hydrogen or an alkyl group having 1 to 4 carbon atoms or a benzyl group; X ⁻ represents an anionic counter ion. )

[0011] The invention of claim 4 of the present invention is a method of manufacturing a dehydrating agent of the organic sludge of claim 3 Symbol placement, nonionic water-soluble monomers characterized in that it is a (meth) acrylamide.

A fifth aspect of the present invention is the third aspect.
There is in the manufacturing method of a dehydrating agent of the organic sludge of claim 4 Symbol mounting, water-soluble anionic vinyl monomer characterized in that it is a (meth) acrylic acid.

[0013] The invention of claim 6 of the present invention is the manufacturing method according to claim 3 or dehydrating agent of the organic sludge loading serial to claim 5, nonionic surfactants of the hydrophilic surfactant HLB9~15 It is characterized by being an activator.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The above formula (1) used in the present invention
Specific examples of the water-soluble cationic vinyl monomer of the component (A) represented by the following are, for example, (1-A) shown below,
(2-A), (3-A), a cationic vinyl monomer selected from the group of (4-A) or a mixture containing at least one cationic vinyl monomer selected from these. Can be. (1-A) Quaternary nitrogen-containing (meth) acrylate [(meth) acrylate refers to acrylate and methacrylate. The same applies hereinafter. (I) (meth) acryloyloxyalkyltrialkylammonium salts such as 2- (meth) acryloyloxyethyltrimethylammonium chloride, 2- (meth) acryloyloxyethyltrimethylammonium methosulfate, 2- (meth) acryloyl Roxyethyltriethylammonium ethosulfate, 3- (meth) acryloyloxypropyldimethylethylammonium methosulfate and the like. (Ii) (meth) acryloyloxyhydroxyalkyltrialkylammonium salts such as 3-methacryloyloxy-2-hydroxypropyltrimethylammonium chloride, 3-methacryloyloxy-2-hydroxypropylmethyldiethylammonium chloride, 3-methacryloyloxy -2-hydroxypropyltrimethylammonium methosulfate and the like.

(2-A) Salt of tertiary nitrogen-containing (meth) acrylate with acid (i) Salt of dialkylaminoalkyl (meth) acrylate such as 2-dimethylaminoethyl (meth) acrylate sulfate, 2-diethylamino Ethyl (meth) acrylate hydrochloride and the like. (Ii) dialkylaminohydroxyalkyl (meth)
Acrylate salts such as 3-dimethylamino-2-hydroxypropyl (meth) acrylate hydrochloride, 3-diethylamino-2-hydroxypropyl (meth) acrylate sulfate and the like.

(3-A) Quaternary nitrogen-containing (meth) acrylamide (i) (meth) acrylamidoalkyltrialkylammonium salt such as 3-acrylamidopropyltrimethylammonium chloride, 2- (meth) acryloylaminoethyltrimethylammonium methosulfate Such. (Ii) (meth) acrylamide hydroxyalkyltrialkylammonium salts such as 3- (meth) acryloylamino-2-hydroxypropyltrimethylammonium chloride and 3- (meth) acryloylaminoethyltrimethylammonium methosulfate.

(4-A) Salt of tertiary nitrogen-containing (meth) acrylamide with acid (i) Salt of dialkylaminoalkyl (meth) acrylamide, for example, 2-dimethylaminoethyl (meth) acrylamide hydrochloride, 2-diethylamino Propyl (meth) acrylamide sulfate and the like. (Ii) dialkylaminohydroxyalkyl (meth)
Acrylamide salts such as 3-dimethylamino-2-
Hydroxypropyl (meth) acrylamide acetate, 3
-Diethylamino-2-hydroxypropyl (meth) acrylamide sulfate and the like.

Specific examples of the bifunctional monomer of the component (B) used in the present invention include, for example, N, N'-methylenebisacrylamide, N, N'-methylenebismethacrylamide, civinylbenzene and the like. A divinyl compound,
Methylol acrylamide, vinyl methylol compounds such as methylol methacrylamide, vinyl aldehyde compounds such as acrolein, vinyl compounds such as methyl acrylamide glycolate methyl ether, and mixtures thereof.
N'-methylenebisacrylamide can be preferably used.

In the present invention, a water-soluble nonionic vinyl monomer may be copolymerized as the component (C) together with the water-soluble cationic vinyl monomer as the component (A). Specific examples of the water-soluble nonionic vinyl monomer (C) used in the present invention include (meth) acrylamide,
Examples thereof include vinyl methyl ether, vinyl ethyl ether and a mixture thereof. Among these, (meth) acrylamide can be preferably used.

Specific examples of the chain transfer agent of the component (D) used in the present invention include, for example, alcohol, mercaptan, phosphite, sulphite and a mixture of any of these.

Specific examples of the oily substance comprising at least one kind of hydrocarbon which is the component (F) used in the present invention include, for example, mineral oils such as kerosene and light oil, or substantially the same range as kerosene and light oil. And hydrocarbon-based synthetic oils having characteristics such as boiling point and viscosity, animal oils, vegetable oils, and mixtures of at least two of these.

The surfactant (G) used in the present invention is a nonionic surfactant having an HLB of 3 to 6, and specific examples thereof include sorbitan monooleate, sorbitan monostearate, and the like. Sorbitan monopalmitate and the like can be mentioned.

In the present invention, the component (A) is a water-soluble cationic vinyl monomer, the component (B) is a bifunctional monomer,
As the component (H) together with the water-soluble nonionic vinyl monomer (C), (meth) acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, vinylsulfonic acid, styrenesulfonic acid, itaconic acid, and maleic acid ,
A water-soluble anionic vinyl monomer such as fumaric acid, arylsulfonic acid and a salt thereof or a mixture containing at least one water-soluble anionic vinyl monomer selected from these is copolymerized by about 2 to 30 mol%. Is also good. Among these, (meth) acrylic acid can be preferably used.

The amount of the component (B) used in the present invention, for example, the amount of N, N'-methylenebisacrylamide is not particularly limited, but the amount of the polymerizable monomer containing the water-soluble cationic vinyl monomer of the component (A) is not limited. 0.0001 to the total amount of the monomer
0.01 mol%, preferably 0.0002 to 0.003
It is preferable to mix and copolymerize in a ratio of mol%. (B)
When the component N, N'-methylenebisacrylamide is 0.0
If it is less than 001 mol%, a sufficient network structure cannot be obtained, and excellent dehydration performance cannot be obtained. On the other hand, if it exceeds 0.01 mol%, it becomes a water-insoluble polymer, and even if it is added to and mixed with sludge, a floc having good dehydration properties cannot be obtained.

[0025] used in the present invention (B) 2-functional components
The type and amount of the monomer are not particularly limited as described above,
It is selected to have an appropriate molecular weight and network structure. In the present invention, the component (A) is a water-soluble cationic vinyl monomer and the component (B) is a bifunctional monomer, and the component (C) is a nonionic monomer .
Water-soluble monomer, water-soluble anionic vinyl monomer (H)
A polymerizable vinyl monomer containing mer, the polymer is adjusted to a suitable molecular weight and having a suitable network structure by reverse phase emulsion polymerization in the presence of a chain transfer agent of the component (D) When used for dehydration of organic sludge, it exhibits a particularly remarkable effect. Although the degree of polymerization of the polymer according to the present invention is not clear because it is a crosslinked product, it can be considered as a polymer obtained by slightly cross-linking a general water-soluble polymer flocculant. Is a flexible macromolecule in which the ionic groups are detected by colloid titration. It is presumed that it is flexible and gives a continuous film when dried.

The polymer according to the present invention can be essentially copolymerized by a commonly used known polymerization method. Particularly, a polymerizable vinyl monomer such as the component (A) is copolymerized in the presence of the bifunctional monomer (B) in the hydrophobic surfactant (G) and the organic solvent (F). Polymerization is preferred. For example, an aqueous solution containing a polymerizable vinyl monomer such as the component (A) and a bifunctional monomer of the component (B), and a hydrophobic surfactant of the component (G) having an HLB of 3 to 6 are included. There is a method for producing a water-in-oil cationic polymer emulsion by mixing and emulsifying a component (F) with an organic dispersion medium and then polymerizing the mixture at a temperature of 30 to 80 ° C. in the presence of a radical polymerization catalyst (Japanese Patent Application Laid-Open (JP-A) No. 2000-123873). No. 61-236250). A hydrophilic surfactant is added to the water-in-oil emulsion, mixed with water, phase-inverted to an oil-in-water emulsion, and used as a dehydrating agent.

As the hydrophilic surfactant used in the present invention, a cationic surfactant or a nonionic surfactant having an HLB of 9 to 15 is used, preferably an HLB of 10 to 1 is used.
No. 4 nonionic surfactant is used. Representative examples of the nonionic surfactant include, for example, polyoxyethylene nonylphenyl ether.

Next, when the dehydrating agent of the present invention is added to the organic sludge and mixed with stirring, a relatively small but entangled hard floc is obtained. Add dehydrating agent to sludge, stir,
The method of mixing varies depending on the conditions of the organic sludge to be treated, but is not specified. For example, about 2% by weight or less is added in the form of a 0.2% by weight water-diluted polymer solution to the total solid content of the sludge, and There is a method in which stirring is performed for a short time to form flocs, and the flocs are dehydrated.

There is no particular limitation on the sludge to which the dehydrating agent of the present invention can be applied. Used for coagulation treatment and dehydration treatment of sludge or a mixture of these sludges. Further, examples of the dehydrator in which the dehydrating agent of the present invention can be used include a decanter, a belt press, a filter press, and a screw press dehydrator. However, the present invention is not limited to these, and other dehydrators can be used.

[0030]

The dehydrating agent of the present invention comprises a water-dispersible polymer having an appropriate network structure and adjusted to an appropriate molecular weight, and is excellent in a wide range of organic sludge at a low dose. It was found that it had coagulation and dehydration performance. This is considered to be due to the fact that the molecular structure and molecular weight of the dehydrating agent of the present invention effectively function to coagulate and dehydrate organic sludge. Of course, it is not limited to this concept.

The dehydrating agent of the present invention can be efficiently produced by the method of producing the dehydrating agent of the present invention.

[0032]

EXAMPLES Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist.

Example 1 A reaction vessel equipped with a stirrer and a temperature controller was heated to a boiling point of 190.
120.0 Kg of isoparaffin and 7.5 Kg of sorbitan monooleate at a temperature between 230C and 230C were charged. 165 kg of demineralized water and 97.9997 mol% of acryloyloxyethyltrimethylammonium chloride (AMC)
(Represented as about 98 in Table 1), acrylic acid (AAc) 2 mol%, methylene bisacrylamide (MBAA) 3 × 1
A mixture of 200 kg of a monomer having a composition of 0 to ⁴ mol% was added, and the mixture was emulsified by stirring with a homogenizer. 200 g of isopropyl alcohol was added to the obtained emulsion, and after purging with nitrogen, 40 g of dimethylazobisisobutyrate was added to complete the polymerization reaction while controlling the temperature at 50 ° C., and then polyoxyethylene nonyl phenyl ether 7.5.
Kg was added and mixed to prepare a sample (sample-1) (the dehydrating agent of the present invention) to be subjected to the test.

Example 2 Acryloyloxyethyltrimethylammonium chloride (AMC) 97.998 mol% (represented as about 98 in Table 1), acrylic acid (AAc) 2 mol%, methylene bisacrylamide (MBAA) 20 A sample (sample-2) (a dehydrating agent of the present invention) to be subjected to the test was prepared in the same manner as in Example 1 except that a mixture of 200 kg of a monomer having a composition of ^10-4 mol% was used.

Example 3 Acryloyloxyethyltrimethylammonium chloride (AMC) 49.9997 mol% (indicated as about 50 in Table 1), acrylic acid (AAc) 10 mol%, acrylamide (AAm) 40 mol% Monomer 20 having a composition of 3 × 10 ^-4 mol% of methylene bisacrylamide (MBAA)
A sample to be subjected to the test (Sample-3) (a dehydrating agent of the present invention) was prepared in the same manner as in Example 1 except that 0 kg of the mixture was used.

Example 4 Acryloyloxyethyltrimethylammonium chloride (AMC) 49.998 mol% (indicated as about 50 in Table 1), acrylic acid (AAc) 10 mol%, acrylamide (AAm) 40 mol% , Methylene bisacrylamide (MBAA) 20 × 10 ^-4 mol% monomer 20
A sample (sample-4) (a dehydrating agent of the present invention) to be subjected to the test was prepared in the same manner as in Example 1 except that 0 kg of the mixture was used.

Comparative Example 1 99.9997 mol% of acryloyloxyethyltrimethylammonium chloride (AMC) (about 100% in Table 1)
Methylene bisacrylamide (MBAA) 3
A sample to be subjected to the test (Sample-5 ) was prepared in the same manner as in Example 1 except that a mixture of 200 kg of the monomer having a composition of × 10 ^-4 mol% was used.

Comparative Example 2 Acryloyloxyethyltrimethylammonium chloride (AMC) 99.998 mol% (indicated as about 100 in Table 1), methylenebisacrylamide (MBAA) 20
A sample to be subjected to the test (Sample-6 ) was prepared in the same manner as in Example 1 except that a mixture of 200 kg of a monomer having a composition of × 10 ^-4 mol% was used.

Comparative Example 3 Acryloyloxyethyltrimethylammonium chloride (AMC) 49.998 mol% (indicated as about 50 in Table 1), acrylamide (AAm) 50 mol%, methylene bisacrylamide (MBAA) 3 × A sample to be subjected to the test (Sample-7 ) was prepared in the same manner as in Example 1 except that a mixture of 200 kg of the monomer having a composition of 10 ^-4 mol% was used.

Comparative Example 4 Acryloyloxyethyltrimethylammonium chloride (AMC) 49.998 mol% (indicated as about 50 in Table 1), acrylamide (AAm) 50 mol%, methylene bisacrylamide (MBAA) 20 × A sample to be subjected to the test (Sample- 8) was prepared in the same manner as in Example 1 except that a mixture of 200 kg of the monomer having a composition of 10 ^-4 mol% was used.

Comparative Example 5 The procedure of Example 1 was repeated except that a mixture of 200 kg of a monomer having a composition of only 98 mol% of acryloyloxyethyltrimethylammonium chloride (AMC) and 2 mol% of acrylic acid (AAc) was used. Sample to be used for test (Sample-
9) was made.

Comparative Example 6 Except that a mixture of 200 kg of a monomer having a composition of 50 mol% of acryloyloxyethyltrimethylammonium chloride (AMC), 10 mol% of acrylic acid (AAc) and 40 mol% of acrylamide (AAm) was used. A sample (sample-10) to be subjected to the test was prepared in the same manner as in Example 1.

Comparative Example 7 A sample (sample- 11 ) to be subjected to the test was prepared in the same manner as in Example 1 except that a mixture of 200 kg of monomer having 100 mol% of acryloyloxyethyltrimethylammonium chloride (AMC) was used. .

[0044] (Examples 5-8) Example 1 of a more synthetic emulsion state 4 the sample -
Sample No. 1 to Sample No. 4 were stirred with tap water and polymer concentration was 0.2
The solution was diluted to 1% by weight, and after 1 hour, the solution whose viscosity was increased was collected and observed with a microscope.
Particles having a particle size of 0 μm or less (about 3 μm) were observed, and the diluted solution was applied to a glass plate and dried by heating at 105 ° C. to form a continuous dried film. Further, when the ion equivalent value of this diluted solution was measured by colloid titration, the ion equivalent value was 85% or more of the theoretical value. With respect to the mixed sludge of excess sludge and tertiary sludge in the night soil treatment plant by the low-dilution two-stage denitrification method, the above liquid was added and mixed such that the amount of polymer added to the sludge was 1.5% by weight of SS, and the belt press was used. Coagulation dewatering treatment was performed using a mold sludge dewatering machine (manufactured by Hitachi Plant). Table 2 shows the results of the dehydration test.

[0045] (Comparative Example 8-14) samples synthesized from emulsion state to Comparative Examples 1 to 4 -
5 to sample- 8 were stirred with tap water while the polymer concentration was 0.2.
The solution was diluted to 1% by weight, and after 1 hour, the solution whose viscosity was increased was collected and observed with a microscope.
Particles having a particle size of 0 μm or less (about 3 μm) were observed, and the diluted solution was applied to a glass plate and dried by heating at 105 ° C. to form a continuous dried film. Further, when the ion equivalent value of this diluted solution was measured by colloid titration, the ion equivalent value was 85% or more of the theoretical value. Samples -9 to -11 in the emulsion state synthesized according to Comparative Examples 5 to 7
Was diluted with tap water to a polymer concentration of 0.2% by weight under stirring, and after 1 hour, a thickened solution was collected and observed with a microscope. As a result, all of the solutions were homogeneous and no particles were observed. . The solution was applied to a glass plate and dried by heating at 105 ° C. to form a continuous dried film. When the ion equivalent value of this solution was measured by colloid titration, the ion equivalent value was 100% of the theoretical value. Coagulation dehydration treatment was performed using Samples- 5 to 11 in the same manner as in Examples 5 to 8 . Table 2 shows the results of the dehydration test.

(Examples 9 to 12 ) Using a centrifugal decanter (manufactured by IHI) for scum produced by the PAC treatment (polyaluminum chloride treatment) generated from the processing step of marine processing wastewater and sludge mixed with excess sludge treated with activated sludge. Te, sample -1 samples synthesized emulsion state by example 1-4 - 4 was diluted to a stirring polymer concentration of 0.2 wt% with tap water,
After 1 hour, the thickened liquid was added to the apparatus so that the amount of polymer added to the sludge was 1.5% by weight with respect to SS, and a coagulation dehydration treatment was performed. Table 3 shows the results of the dehydration test.

(Comparative Examples 15 to 21 ) Coagulation dehydration treatment was performed using Samples 5 to 11 in the same manner as in Examples 9 to 12 . Table 3 shows the results of the dehydration test.

[0048]

[Table 1]

[0049]

[Table 2]

[0050]

[Table 3]

[0051]

According to the dehydrating agent of the present invention, the conventional coagulant was effective only at a high dose, whereas raw sludge from city sewage, human waste, general industrial wastewater, excess sludge, coagulated sludge, digestion Add a small dose when coagulating a wide range of organic sludge such as sludge, or a mixture of these sludges, or when coagulating and dewatering these sludges with a decanter, belt press, filter press, screw press dehydrator, etc. Thereby, it exhibits excellent coagulation and dehydration performance such as recovery rate and water content. The dehydrating agent of the present invention can be easily produced by a known method, and is excellent in both coagulation performance and dehydration performance, and therefore has high industrial utility value.

──────────────────────────────────────────────────の Continuing on the front page (51) Int.Cl. ⁷ identification symbol FI C09K 3/32 C09K 3/32 J (58) Investigated field (Int.Cl. ⁷ , DB name) C02F 11/14

Claims (6)

(57) [Claims] (A) 5 to 97.9999 moles of all monomers
% Of water-soluble cationic vinyl represented by the following formula (1)
Monomer or mixture thereof, (B) 0.000 of all monomers
1 to 0.01 mol% of a bifunctional monomer, (C)
Nonionic water-soluble monomer to be added in advance, (D) chain transfer
Agent, (E) water, (F) at least one hydrocarbon
(G) reversed-phase emulsion, ie, water-in-oil type
An effective amount to form an emulsion and a small amount of HLB
At least one surfactant and (H) 2 to 2 of all monomers
30 mol% of a water-soluble anionic vinyl monomer or
A mixture is prepared, and the above components (A) to (H) are mixed and stirred vigorously as appropriate, and
After the formation of fine monomer phase droplets, polymerization
A mixture of the reverse-phase emulsion polymer and a hydrophilic surfactant produced, and diluted with water to a concentration to be added to sludge, particles having a particle size of 30 μm or less are observed under a microscope. An organic sludge dehydrating agent having the property of forming a continuous dried film when applied to a substrate and dried at 105 ° C. Embedded image (Where A is O or NH; B is C ₂ H ₄ , C ₃
H ₆ , C ₃ H ₅ OH; R ₁ is H or CH ₃ ; R ₂ , R
₃ represents an alkyl group having 1 to 4 carbon atoms; R ₄ represents hydrogen or an alkyl group having 1 to 4 carbon atoms or a benzyl group; and X ⁻ represents an anionic counter ion. ) 2. The organic sludge dewatering agent according to claim 1, wherein the diluent of the organic sludge with water is added to the organic sludge, the organic sludge is agglomerated by stirring, and the agglomerated sludge is dehydrated by a dehydrator. Organic sludge treatment method. 3. (A) 5 to 99.9999 mol% of the water-soluble cationic vinyl monomer represented by the following formula (1) or a mixture thereof, and (B) the total monomer 0.000
Bifunctional monomer of 1-0.01 mole%, (C) required under
Flip and nonionic water-soluble monomer to be added, (D) a chain transfer agent, (E) water, (F) at least one oil comprising a hydrocarbon and (G) reverse phase emulsion i.e. a water-in-oil emulsion at least one surfactant which is effective amount and HLB to generate and (H) the total monomer in
2 to 30 mol% of a water-soluble anionic vinyl monomer or
The mixture is prepared, and the components (A) to (H) are appropriately mixed and vigorously stirred to form fine monomer phase droplets in the oil phase, and then subjected to a polymerization operation to mix the hydrophilic surfactant. And a method for producing a dehydrating agent for organic sludge, wherein the method is used after dilution with water. Embedded image (Where A is O or NH; B is C ₂ H ₄ , C ₃
H ₆ , C ₃ H ₅ OH; R ₁ is H or CH ₃ ; R ₂ , R
₃ represents an alkyl group having 1 to 4 carbon atoms; R ₄ represents hydrogen or an alkyl group having 1 to 4 carbon atoms or a benzyl group; X ⁻ represents an anionic counter ion. ) 4. The process for producing nonionic water-soluble monomer is a (meth) according to claim 3 Symbol placement of organic sludge dehydrating agent, characterized in that acrylamide. 5. There is claim 3 water-soluble anionic vinyl monomer characterized in that it is a (meth) acrylic acid
A method for producing a dehydrating agent for organic sludge according to claim 4. 6. The method for producing a hydrophilic surfactant organic sludge dehydrating agent according to any one of claims 3 to 5, characterized in that a nonionic surfactant of HLB9～15.