JP2019037962A - Method of reforming organic waste - Google Patents

Abstract

To provide a method for reforming the organic waste by aggregation treatment, by adding a polymer in the treatment of organic waste generated from livestock farming facilities such as a poultry farm and a pig farm.SOLUTION: A water-soluble polymer soluble in an aqueous salt solution as a dispersant, which contains, as a dispersant, a monomer or a monomer mixture essentially containing an alkali agent and a monomer represented by a specific structural formula is made to coexist with respect to an organic waste, and the organic waste can be efficiently reformed by adding, mixing and aggregating a water-soluble polymer dispersion obtained by dispersion polymerization under stirring in the aqueous salt solution.SELECTED DRAWING: None

Description

The present invention relates to a method for modifying organic waste. More specifically, it is a treatment method in which chemicals are added to organic waste generated in livestock facilities such as pig farms and poultry farms to improve and solidify, and more specifically, alkaline agents and specific compositions Water-soluble polymer dispersion liquid dispersion obtained by dispersing and polymerizing a monomer mixture having a water-soluble polymer coexisting in an aqueous salt solution as a dispersant in the aqueous salt solution while stirring is added and solidified. The present invention relates to a method for reforming organic waste.

Examples of organic waste generated in livestock facilities for livestock such as pig farms and poultry farms include fertilizers, livestock manure, feed, various sludges, and garbage. Among these organic wastes, solid ones can be easily discharged or reused outside the site, but water-containing ones need to be reformed. Various chemical additive formulations have been proposed to improve these organic wastes. In general, polyacrylamide (PAM) water-soluble polymers are widely used as chemicals. For example, Patent Document 1 discloses a method for producing an aged compost-like product in which a polymer is added to and mixed with organic waste, followed by heat drying, and then heat treatment. The polymer used is a cationic polymer such as a copolymer of (meth) acryloyloxyethyltrimethylammonium chloride and acrylamide, such as a copolymer of (meth) acryloyloxyethyltrimethylammonium chloride, acrylic acid and acrylamide. Amphoteric polymers and the like are described.
Patent Document 2 discloses a method for treating animal fertilizer that produces a final liquid content and a final solid content, and has a suspended solid (SS) content of about 3 g / L or less, and adds polyacrylamide. It is described to do.
Patent Document 3 discloses a process for removing volatile gas from moisture-containing sludge such as animal waste, and describes the use of various polymers as a flocculant for enhancing the dehydration effect.
According to Patent Document 4, compost fertilizer to be fermented by adding re-cellulose fiber to animal manure with a water content of 90% by mass or more, adding an organic polymer flocculant and stirring sufficiently to form floc, and then squeezing. A production method is disclosed, and various polymers are described as organic polymer flocculants.
However, none of these documents describe the effective composition and physical properties of the polymer used. Further, depending on the object, there are cases where a satisfactory effect cannot be obtained with the conventional reforming recipe, and there is a demand for an efficient method for reforming organic waste using a polymer.

JP 2004-99427 A JP 2005-522399 A JP 2006-510487 A JP 2003-095769 A

An object of the present invention is to provide a method for reforming organic waste by agglomeration treatment by adding a polymer in reforming organic waste generated from livestock facilities such as pig farms and poultry farms. is there.

As a result of intensive studies to solve the above problems, the present inventor has reached the invention described below. That is, a monomer or monomer mixture containing an alkaline agent and a monomer represented by the following general formula (1) as an essential component is soluble in an aqueous salt solution as a dispersant. This is a method for reforming organic waste, in which a water-soluble polymer dispersion obtained by dispersing and polymerizing a water-soluble polymer in the aqueous salt solution with stirring is added.
General formula (1)
R ₁ is hydrogen or a methyl group, R ₂ and R ₃ are alkyl groups or hydroxyalkyl groups having 1 to 3 carbon atoms, R ₄ is an alkyl or alkoxyl group having 1 to 3 carbon atoms, and an alkyl group or aryl group having 7 to 20 carbon atoms. , a is oxygen or NH, B represents an alkylene group having 2 to 4 carbon atoms, _{X 1} ^- represents respectively an anion.

The organic waste can be efficiently modified by applying the alkaline agent and the water-soluble polymer dispersion in the present invention to the organic waste.

The modification method in the present invention is characterized in that an alkaline agent and a water-soluble polymer dispersion are added to organic waste generated from livestock facilities for livestock, mixed and aggregated, and then modified. Compared to commonly used polymers, it has a specific composition and is manufactured by a specific manufacturing method, so it has good dissolution efficiency, and when added to organic waste, it exhibits an excellent coagulation effect and efficiency It can be well modified. The modified waste can be reused as organic fertilizer and feed.

  The organic waste in the present invention mainly includes surplus and waste of animal feeds generated from livestock facilities such as pigs, chickens, cattle, sheep and horses, manure and garbage of domestic animals, sewage treatment sludge And surplus sludge, digested sludge, septic tank sludge, sludge obtained by dehydrating biological treatment sludge generated in the biological treatment process of wastewater and waste, and the like, and a plurality of these may be included. Among these organic wastes that are liquid or have a high water content, it is necessary to modify the organic waste because it reduces work efficiency when discharged out of the field or when reused. A reforming method is applied.

  Examples of the alkaline agent in the present invention include slaked lime (calcium hydroxide), caustic soda, sodium carbonate, potassium carbonate, potassium hydroxide and the like. One or a combination of two or more of these can be used. In the present invention, the alkali agent and the water-soluble polymer dispersion may be added at the same time or first, but it is preferable to add the water-soluble polymer dispersion after adding the alkali agent. The addition rate of the alkaline agent varies depending on the target organic waste, but is 500 to 10,000 ppm with respect to the organic waste, and is preferably in the range of 1000 to 8000 ppm. The treatment effect is enhanced by changing the pH of the object from neutral to weakly alkaline, and a pH of 6 to 11 is a preferred range.

The water-soluble polymer dispersion in the present invention contains a monomer or monomer mixture aqueous solution containing a monomer represented by the following general formula (1) as an essential component in a salt aqueous solution. It is a water-soluble polymer dispersion obtained by coexisting a soluble polymer dispersant and dispersion polymerization under stirring.
General formula (1)
R ₁ is hydrogen or a methyl group, R ₂ and R ₃ are alkyl groups or hydroxyalkyl groups having 1 to 3 carbon atoms, R ₄ is an alkyl or alkoxyl group having 1 to 3 carbon atoms, and an alkyl group or aryl group having 7 to 20 carbon atoms. , a is oxygen or NH, B represents an alkylene group having 2 to 4 carbon atoms, _{X 1} ^- represents respectively an anion.

The cationic monomer represented by the general formula (1) used for producing the water-soluble polymer dispersion in the present invention is a chloride such as dimethylaminoethyl (meth) acrylate or dimethylaminopropyl (meth) acrylamide. Quaternized product with methyl or benzyl chloride. Examples of the cationic monomer represented by the general formula (1) include (meth) acryloyloxyethyltrimethylammonium chloride, (meth) acryloyloxy-2-hydroxypropyltrimethylammonium chloride, and (meth) acryloylaminopropyl. Trimethylammonium chloride, (meth) acryloyloxyethyldimethylbenzylammonium chloride, (meth) acryloyloxy-2-hydroxypropyldimethylbenzylammonium chloride, (meth) acryloylaminopropyldimethylbenzylammonium chloride. These cationic vinyl monomers can be used alone or in combination of two or more. The cationic monomer represented by the general formula (1) is preferably in the range of 30 to 100 mol%. This is because when the cation degree is in this range, the molecular weight can be increased to some extent, and the neutralizing action for neutralizing the anionic charge of the suspended particles in the organic waste and the aggregation effect by cross-linking adsorption can be exhibited in a well-balanced manner. It is.

When producing the water-soluble polymer dispersion in the present invention, the cationic monomer represented by the general formula (1) and a nonionic monomer may be copolymerized. Nonionic monomers used in this case include (meth) acrylamide, N, N′-dimethylacrylamide, acrylonitrile, 2-hydroxyethyl (meth) acrylate, diacetone acrylamide, N-vinylpyrrolidone, N -Vinylformamide, N-vinylacetamide, acryloylmorpholine, etc. are mentioned. Two or more of these may be used in combination. As for the total amount of the cationic monomer which comprises the water-soluble polymer dispersion in this invention, 30-100 mol% is preferable.

The water-soluble polymer dispersion in the present invention may be amphoteric in ionicity. In that case, an anionic monomer represented by the following general formula (2) is used at the time of production.
General formula (2)
R ₅ is hydrogen, methyl group or carboxymethyl group, Q is SO ₃ ⁻ , C ₆ H ₄ SO ₃ ⁻ , CONHC (CH ₃ ) ₂ CH ₂ SO ₃ ⁻ , C ₆ H ₄ COO ⁻ or COO ⁻ , R ₆ represent respectively + _Y ^2, _{Y 1} or _{Y 2} is hydrogen or a cation and - is hydrogen or ^COO.

The anionic monomer represented by the general formula (2) used in producing the amphoteric water-soluble polymer dispersion in the present invention is in the range of 0 to 15 mol%. If it exceeds 15 mol%, the neutralizing action for neutralizing the anionic charge of the suspended particles in the organic waste is reduced, which is not preferable. Examples of anionic monomers include vinyl sulfonic acid, vinyl benzene sulfonic acid or 2-acrylamido-2-methylpropane sulfonic acid, methacrylic acid, acrylic acid, itaconic acid, maleic acid, phthalic acid or p-carboxystyrene acid Etc. Two or more of these may be used in combination. Further, a cationic monomer represented by the general formula (1) and an anionic monomer represented by the general formula (2) may be used, and the cationic monomer represented by the general formula (1) may be used. You may use a monomer, the anionic monomer represented by General formula (2), and the said nonionic monomer.

The water-soluble polymer dispersion in the present invention is produced by a salt water dispersion polymerization method. The manufacturing method is a known method disclosed in Japanese Patent Application Laid-Open No. 61-123610, Japanese Patent Application Laid-Open No. 62-20511, Japanese Patent Application Laid-Open No. 2007-16086, Japanese Patent Application Laid-Open No. 2006-003255, and the like. That is, it is produced by dispersing and polymerizing an ionic monomer and nonionic monomer mixture in the aqueous salt solution in the presence of a water-soluble polymer that can be dissolved in the aqueous salt solution as a dispersant. In that case, by adding 0.5 to 5 mol% of a polymerization retarding substance with respect to all monomers, it is possible to produce a water-soluble polymer that can suppress thickening and has a high weight average molecular weight. The polymerization retarding substance is at least one selected from itaconic acid, maleic acid, phthalic acid, allylamine, and diallyldimethylammonium chloride.

The polymerization conditions at the time of dispersion polymerization in brine are usually determined appropriately depending on the monomers used and the copolymerization mol%, and the temperature is in the range of 0 to 100 ° C. For the initiation of polymerization, a radical polymerization initiator is used. These initiators may be either oil-soluble or water-soluble, and can be polymerized by any of azo, peroxide, and redox systems. Examples of oil-soluble azo initiators are 2,2′-azobisisobutyronitrile, 1,1′-azobis (cyclohexanecarbonitrile), 2,2′-azobis (2-methylbutyronitrile), 2,2′-azobis (2-methylpropionate), 4,4′-azobis (4-methoxy-2,4-dimethyl) valeronitrile, and the like are mentioned, which are dissolved in a water-miscible solvent and added.

Examples of water-soluble azo initiators include 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′-azobis [2- (2-imidazolin-2-yl) propane] dihydrochloride 4,4′-azobis (4-cyanovaleric acid) and the like. Examples of redox systems include a combination of ammonium peroxodisulfate and sodium sulfite, sodium hydrogen sulfite, trimethylamine, tetramethylethylenediamine and the like. Examples of peroxides include ammonium or potassium peroxodisulfate, hydrogen peroxide, benzoyl peroxide, lauroyl peroxide, octanoyl peroxide, succinic peroxide, t-butylperoxy 2-ethylhexanoate, and the like. be able to. Most preferred among these initiators are 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′-azobis [2- (2-imidazolin-2-yl), a water-soluble azo initiator. ) Propane] dihydrochloride. The addition rate of the azo initiator is 50 to 500 ppm, preferably 70 to 200 ppm per monomer at the start of polymerization. However, since the polymerization rate is lowered by a single addition, it is preferable to add in several portions.

In addition, when copolymerizing with a redox initiator, it is difficult to control the polymerization when the polymerization is started at a temperature of 40 ° C. or more, and a rapid temperature rise or agglomeration of the polymerization solution occurs, resulting in a high degree of polymerization and stability. Since a dispersion liquid cannot be obtained, 15-35 degreeC is preferable. The initiator is added at a rate of 5 to 100 ppm, preferably 10 to 50 ppm per monomer at the start of polymerization. However, since the polymerization rate is lowered by a single addition, it is preferably added several times. As addition frequency, it is 2-5 times, Preferably it is 2-3 times. The addition rate of the polymer dispersant composed of these ionic polymers is 1 to 30% by mass, preferably 2 to 20% by mass with respect to the monomer. If it is 1% by mass or less, there is no effect as a dispersing agent, and if it is 30% by mass or more, the viscosity of the dispersion becomes high and the cost becomes disadvantageous.

A crosslinkable monomer may be used as a structural modifier during or after the polymerization for producing the water-soluble polymer dispersion in the present invention. When used, the crosslinkable monomer is present in the range of 0.00005 to 0.050 mass% with respect to the total amount of monomers. Although it varies depending on the monomer composition and polymerization conditions, if it exceeds 0.050 mass%, crosslinking proceeds excessively and becomes insoluble in water, which is not preferable for use in the present invention. Examples of the crosslinkable monomer include N, N′-methylenebis (meth) acrylamide, triallylamine, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, Methacrylic acid-1,3-butylene glycol, polyethylene glycol di (meth) acrylate, N-vinyl (meth) acrylamide, N-methylallylacrylamide, glycidyl acrylate, polyethylene glycol diglycidyl ether, acrolein, glyoxal, vinyltrimethoxy Silane and the like can be mentioned, and N, N′-methylenebis (meth) acrylamide is preferably applied.

The polymer dispersant used in the production of the water-soluble polymer dispersion in the present invention can be either ionic or nonionic, but is preferably ionic, and more preferably cationic. In the case of a cationic polymer dispersant, a (co) polymer of a cationic monomer such as (meth) acryloyloxyethyltrimethylammonium chloride or dimethyldiallylammonium chloride is used as the polymer dispersant. Copolymers of monomers and nonionic monomers can also be used. Examples of nonionic monomers include acrylamide, N-vinylformamide, N-vinylacetamide, N-vinylpyrrolidone, N, N-dimethylacrylamide, acrylonitrile, diacetone acrylamide, 2-hydroxyethyl (meth) acrylate, etc. However, a copolymer with acrylamide is preferred.

Nonionic polymer dispersants include polyvinylpyrrolidone, acrylamide / polyvinylcaprolactam copolymer, acrylamide / styrene copolymer, and complete amidation product of maleic anhydride / butene copolymer, and some hydrophobicity A water-soluble polymer having a group is also effective.

The molecular weight of these cationic polymer dispersants is 5,000 to 2,000,000, preferably 50,000 to 1,000,000. The molecular weight of the nonionic polymer dispersant is 1,000 to 100,000, preferably 1,000 to 50,000. The addition rate of these nonionic or ionic polymer dispersants is 1 to 20% by mass, preferably 5 to 15% by mass, based on the monomer.

As the salt to be used, a combination of a cation such as an alkali metal ion such as sodium or potassium or an ammonium ion and an anion such as halide ion, sulfate ion, nitrate ion or phosphate ion can be used. However, a salt with a polyvalent anion is more preferable. The salt concentration of these salts can be used from 10% by mass to the saturated concentration.

The polymerization concentration is 10% by mass to 35% by mass as the monomer concentration, and preferably 15% by mass to 30% by mass. This is because the higher the monomer concentration, the more economically advantageous due to the problem of transportation costs. However, if the monomer concentration exceeds 35% by mass, the viscosity increases during production and it becomes difficult to obtain a dispersion. is there. As a monomer supply method, it may be charged all at once at the start of polymerization, or may be charged in an appropriate manner.

  The viscosity measured at 25 ° C. when completely dissolved in water so that the polymer concentration of the water-soluble polymer dispersion in the present invention is 0.2% by mass is in the range of 100 mPa · s or less. 70 mPa · s or less is more preferable, and 50 mPa · s or less is even more preferable. When the water-soluble polymer dispersion has viscosity properties in this range, it is efficiently mixed with organic waste when dispersed. The 0.2 mass% aqueous solution viscosity is a value measured with a No. 2 rotor and 30 rpm in a B-type viscometer. As the B-type viscometer, B8M manufactured by Tokyo Keiki Co., Ltd. is used.

  The molecular weight of the water-soluble polymer dispersion in the present invention is 1 million to 10 million, preferably 1 million to 8 million, in terms of weight average molecular weight. Further, when the water-soluble polymer dispersion was completely dissolved in 2% by mass ammonium sulfate water so that the polymer concentration was 0.5% by mass, the salt aqueous solution viscosity measured at 25 ° C. with a rotational viscometer was 5 mPa · The range is from s to 100 mPa · s, preferably from 5 mPa · s to 70 mPa · s. When the viscosity physical properties are within this range, the effect of the coagulation treatment is optimal. This 0.5 mass% salt aqueous solution viscosity is a value measured with a No. 1 rotor and 60 rpm in a B-type viscometer.

The water-soluble polymer dispersion in the present invention is a method for modifying an organic waste by adding it to an organic waste in combination with an alkaline agent, mixing it and aggregating it. Organic waste mainly includes surplus and waste of animal feed generated from livestock facilities such as pigs, chickens, cattle, sheep and horses, animal waste and waste, sewage treatment sludge and surplus sludge, Examples include digested sludge, septic tank sludge, and sludge obtained by dehydrating biologically treated sludge generated in the biological treatment process of wastewater and waste. The organic matter VSS value (ignition loss in suspended matter, mass% vs. SS) serving as an index of organic waste is preferably 80% by mass / SS or more, more preferably 85% by mass / SS or more. The moisture content is preferably in the range of 70% by mass to 90% by mass. The SS concentration is preferably 10% by mass to 30% by mass. Various measured values are based on measurements based on a conventional method (sewage test method).

  Among organic wastes, there are cases where liquid feed for animals is discharged as waste, or mixed with powdered feed for reuse. When discharging, the liquid feed is modified and solidified because work efficiency decreases or fluidity makes it difficult to mix with powdered feed, or it tends to rot and cannot be stored for a long time. There is a need. Further, when the liquid state or the water content is high, the volume is large and the problem of the storage place arises. In such a case, the reforming method of the present invention is suitable. The reason why the modification method of the present invention is suitable for animal liquid feeds is to increase the anionic charge of suspended particles in the feed by adding an alkaline agent, and to increase the viscosity of the starch contained in the feed. It is presumed that the effect of the water-soluble polymer dispersion is exhibited to the maximum by reducing the lactic acid and converting lactic acid produced by lactic acid fermentation into lactate.

Since the water-soluble polymer dispersion in the present invention has excellent solubility, it can be added as it is, or can be added to organic waste after being dissolved and diluted with water to an arbitrary concentration. In the case of dissolution, a dissolution concentration of 0.05 to 0.3% by mass is generally applied. Moreover, although the addition rate with respect to organic waste is 50-2000 ppm normally, it adjusts arbitrarily with the organic waste made into object. In addition to the alkali agent, it may be used in combination with an inorganic flocculant such as ferric chloride, polyferric sulfate, polyaluminum chloride, and sulfuric acid band.

  After the addition treatment of the alkaline agent and the water-soluble polymer dispersion in the present invention, the organic waste is used in a sludge dewatering machine such as a screw concentrator, a centrifugal concentrator, an elliptical concentrator, etc. A dehydrator such as a belt press, a centrifugal dehydrator, a screw press, a multiple disk dehydrator, a rotary press, a filter press, etc. can be arbitrarily applied. In addition to these, the same technical idea regarding compression can be arbitrarily applied.

EXAMPLES Hereinafter, although an Example demonstrates this invention in more detail, this invention is not restrict | limited to a following example, unless the summary is exceeded.

First, water-soluble polymer dispersion samples A to C used in the present invention were produced by a conventional method. These compositions and physical properties are shown in Table 1. In addition, samples 1 to 5 which are generally used as a polymer flocculant were prepared and prepared. These compositions and physical properties are shown in Table 1. Furthermore, a general-purpose coagulant sample 6 (diallyldimethylammonium chloride copolymer, cation equivalent 6.1 meq / g at pH 7, product concentration 35%, weight average molecular weight 250,000), flocculant sample 7 (polyamidine water-soluble high Molecule, cation equivalent of 5.2 meq / g at pH 7, powder product, weight average molecular weight 3 million).

(Table 1)
DMQ: acryloyloxyethyltrimethylammonium chloride DMC: methacryloyloxyethyltrimethylammonium chloride DMBZ: acryloyloxyethyldimethylbenzylammonium chloride AAM: acrylamide AAC: acrylic acid form; DR: dispersion polymer solution in brine, EM: oil Water-type emulsion, P: 0.2 mass% powder aqueous solution viscosity; viscosity measured at 25 ° C. when dissolved in water so that the polymer concentration is 0.2 mass% (mPa · s)
0.5% by weight salt aqueous solution viscosity (dispersed polymer in salt water): Viscosity measured at 25 ° C. when dissolved in 2% by weight ammonium sulfate water so that the polymer concentration is 0.5% by weight (mPa · s) .
Viscosity measured at 25 ° C. (mPa · s) when dissolved in 4% by weight salt solution so that the polymer concentration is 0.5% by weight. ).

Example 1
The reforming performance of the alkali agent and water-soluble polymer dispersion addition formulation in the present invention was evaluated. As the target organic waste, a slurry mainly composed of a liquid feed waste for pig farming in a pig farm was used. The analysis value of the waste sample was as follows. pH 3.7, EC 756 mS / m, SS concentration 16.4% by mass, TS concentration 18.7% by mass, VSS 87.2% by mass / SS, anion amount 2.35 meq / L. 100 mL of the waste sample was collected in a graduated cylinder and used for the test. After adding 4500 ppm of slaked lime as an alkaline agent to the first liquid, add 0.2 ppm by weight of the water-soluble polymer dispersion sample A in Table 1 of the present invention in Table 1 as the second liquid, add 400 ppm to the liquid, and with a spatula After 100 times of mixing and stirring, the mixture was filtered through a nylon filter cloth (# 202), and the filtrate amount and floc diameter after 60 seconds were measured. After the measurement, the sludge filtered for 60 seconds was dehydrated at a press pressure of 3 kg / cm ² for 30 seconds, and the moisture content of the cake (dried at 105 ° C. for 20 hours) was measured. The results are shown in Table 2. The waste sample after addition of slaked lime had a pH of 7.0.

(Examples 2 to 8)
A similar test was carried out using the same waste sample as in Example 1. The test was carried out by adding slaked lime or caustic soda to the first liquid and adding the water-soluble polymer dispersion samples A to C of the present invention in Table 1 to the second liquid. The results are shown in Table 2.

(Comparative Examples 1-14)
As a comparative test, the same waste test as in Example 1 was used, and a similar test was performed. The results are shown in Table 2.

(Table 2)

When the alkaline agent and the water-soluble polymer dispersion sample in the present invention were added, the waste sample formed flocs, the filtration rate was high, the aggregation performance was high, and the cake moisture content was also reduced. It was confirmed that the organic waste was efficiently modified by adding the alkaline agent and the water-soluble polymer dispersion in the present invention. On the other hand, when a polymer other than the water-soluble polymer dispersion in the present invention was used or when an alkaline agent was not used, almost no floc was formed, and no modification of organic waste was observed.

Claims (4)

A water-soluble polymer that is soluble in an aqueous salt solution as a dispersant containing a monomer or a monomer mixture containing an alkaline agent and a monomer represented by the following general formula (1) as an essential component in organic waste A method for reforming organic waste, comprising adding and mixing a water-soluble polymer dispersion obtained by dispersion polymerization under stirring in an aqueous salt solution.
General formula (1)
R ₁ is hydrogen or a methyl group, R ₂ and R ₃ are alkyl groups or hydroxyalkyl groups having 1 to 3 carbon atoms, R ₄ is an alkyl or alkoxyl group having 1 to 3 carbon atoms, and an alkyl group or aryl group having 7 to 20 carbon atoms. , a is oxygen or NH, B represents an alkylene group having 2 to 4 carbon atoms, _{X 1} ^- represents respectively an anion. The method for reforming organic waste according to claim 1, wherein the alkaline agent is at least one selected from slaked lime, caustic soda, sodium carbonate, potassium carbonate, and potassium hydroxide. 2. The method for reforming organic waste according to claim 1, wherein the water-soluble polymer dispersion has a 0.2 mass% aqueous solution viscosity at 25 ° C. of 100 mPa · s or less. 2. The organic waste reforming method according to claim 1, wherein an organic matter amount VSS value of the organic waste is 80 mass% / SS or more.