JP2019037975A - Defoaming agent composition for excreta treatment liquid and method for using the same - Google Patents

Abstract

To provide a defoaming agent composition having high defoaming capacity even on a foaming liquid such as excreta process liquid having high viscosity and high BOD value which is insufficient in defoaming capacity in conventional technology and is difficult to sustain defoaming capacity.SOLUTION: A defoaming agent composition contains 5-50 wt.% of a silicone resin and 50-95 wt.% of city water.SELECTED DRAWING: None

Description

  The present invention relates to an antifoaming composition that suppresses foaming during excrement treatment and a method for using the same.

  As a general method for treating manure such as livestock, an aerobic fermentation treatment is performed by subjecting the manure slurry containing solids to an aerobic treatment, and this is used as a fertilizer or the like as it is. An aeration apparatus is used to perform the aeration treatment of manure slurry, but many bubbles are generated in this process. Conventionally, this foaming has been suppressed using a defoaming apparatus. However, in this method, since the defoaming property with respect to the high-viscosity feces and urine liquid is insufficient, the treatment may not be completed, and it is necessary to use an antifoaming agent in combination.

  Moreover, livestock manure is sprayed on farmland as fertilizer after fermentation treatment. At this time, a large amount of foam is generated when the manure slurry is transferred from the aerobic fermentation treatment facility to the tank of the spraying equipment, and the tank overflows before the tank is filled with the manure slurry. Can not. Therefore, it is necessary to add an antifoaming agent to the manure slurry in the aerobic fermentation treatment facility and the tank at the time of transfer.

  An antifoaming agent generally uses an oil, fat, mineral oil, silica, alcohol or the like as an antifoaming component. However, in many cases, the environmental load is large, and there is a limit to the amount used and the scenes where it can be used. In particular, those that are released into the environment as a fertilizer after treatment, such as manure liquid, have not been used because sufficient defoaming effects have not been obtained due to restrictions on the amount used.

  Among antifoaming agents, silicone-based antifoaming agents have a relatively low environmental impact and have high foam breaking properties. It is used in a wide range of applications such as the food industry and agricultural chemical sprays. Among them, since the emulsion type antifoaming agent is excellent in diffusing power, it is not necessary to stir the foamed liquid and can exert a quick bubble breaking effect.

  However, the emulsion type antifoaming agent has a low defoaming ability, and the antifoaming ability is sufficiently reduced under severe conditions such as high viscosity and high BOD (Biological Oxygen demand) values such as manure slurry. It was difficult to demonstrate the ability. Therefore, many studies on the antifoaming composition for such manure slurry have not been made.

JP 2005-525931 A JP 2011-206657 A JP-A-1-135510 JP 2014-008455 A JP 2000-288308 A

  Defoaming that has high defoaming ability even for foaming liquids with high viscosity and high BOD value, such as manure slurry, where the defoaming ability is insufficient in the prior art and it is difficult to maintain the defoaming ability An object is to provide an agent composition.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have completed the present invention.

That is, the present invention
“(1) an antifoam composition comprising 5 to 50% by weight of a silicone resin and 50 to 95% by weight of water;
(2) An antifoam composition comprising 5 to 50% by weight of a silicone resin, 0.1 to 5% by weight of a preservative, and 45 to 94.5% by weight of water,
(3) The antifoam composition according to (2), wherein the preservative according to (2) is benzothiazolin-3-one,
(4) The silicone resin according to (1) to (2) is one type selected from the group consisting of organosiloxane, polyorganosiloxane, and polysiloxane, according to any one of (1) to (3). Antifoam composition,
(5) The antifoaming agent according to any one of (1) to (4), wherein bubbles generated in a tank of a manure facility and a fertilizer facility that disperses manure as fertilizer are suppressed and broken. Composition,
(6) The manure facility described in (5) is an aerobic fermentation-type manure facility, wherein the manure in the manure processing facility is convected in a circle on a horizontal plane, and the convection manure surface is (1) to ( 5) a method for using an antifoaming agent composition to which the antifoaming agent composition according to any one of 5) is added,
(7) Antifoam added by adding the antifoam composition according to any one of (1) to (5) from an air inlet of an aeration treatment facility attached to the aerobic fermentation-type manure facility according to (6) To use the agent composition,
(8) The manure facility described in (5) is an aerobic fermentation type and an anaerobic fermentation type manure facility, and when transferring manure from the manure facility to a fertilizer tank, a certain amount according to the speed of transfer The method of using the antifoaming agent composition according to any one of (1) to (5), which is added while automatically adjusting
(9) The antifoam composition according to (8), wherein the antifoam composition according to any one of (1) to (5) is diluted 50 to 500 times with water in advance. How to use,
(10) Any one of (6) to (9), wherein the antifoam composition according to any one of (1) to (5) is added to a concentration of 2 to 30 ppm with respect to excreta. A method of using the antifoam composition described in
(11) The transfer speed of manure from the manure facility according to any one of (5) to (6) and (8) to the fertilizer tank is 2000 to 8000 L per minute (6) to (10 ) A method of using the antifoam composition according to any one of
(12) Use method of antifoamer composition as described in any one of (6)-(11) whose solid content of excrement is 10% or more. "
Related to.

  The antifoaming composition of the present invention can rapidly break and suppress bubbles generated by treating manure, and can contribute to labor saving of manure treatment.

  Hereinafter, the antifoaming composition of the present invention will be described in more detail.

  The manure applicable to the present invention is any manure discharged by mammals and may be any of livestock such as cows and pigs and humans, but is not limited thereto. It is desirable not to remove the solid content of the manure slurry composed of these before being transferred to the treatment facility, and the solid content is preferably 10% or more. If the solid content is less than 10%, a remarkably large amount of foam is generated, which may not be applicable to the present invention. Moreover, since the excrement slurry is remarkably high, for example, with a BOD value of 16000 ppm and a viscosity of 1000 mPa · s, compared with general industrial wastewater, defoaming becomes difficult.

  The antifoaming composition of the present invention can be produced by mixing a silicone resin, a surfactant, water and an additive.

［式（１）において、ｎは１以上の整数を表す。］ The silicone resin used in the antifoam composition of the present invention may be any of organosiloxane, polyorganosiloxane and polysiloxane, and is not limited to these, but is preferably a compound of formula (1). Further, these silicone resins can contain a substituent having an arbitrary structure in the molecular structure.

[In Formula (1), n represents an integer greater than or equal to 1. ]

  The content rate of the silicone resin in the antifoamer composition of this invention is 5 to 50 weight% normally, Preferably it is 10 to 30 weight%. When the content of the antifoaming agent composition is less than 5% by weight, sufficient efficacy of the antifoaming component cannot be expected, and when it exceeds 50% by weight, the fluidity is lowered and the diffusibility in the liquid is reduced. Decreases, resulting in a variation in efficacy.

  The antifoam composition of the present invention may contain a preservative, and its content is 0.01 to 10% by weight, preferably 0.05 to 7.0% by weight, more preferably 0.1 to 0.1% by weight. 5% by weight. If the content of the preservative is less than 0.01% by weight, the expected antiseptic effect cannot be obtained, and if it exceeds 10% by weight, the addition becomes more than necessary, causing a burden on the environment. Specific examples of the preservative include sodium pyrithione, zinc pyrithione, polyhexamethylene biguanide, benzothiazoline-3-one, and among them, benzothiazoline-3-one is preferable.

  The antifoam composition of the present invention may contain one or more surfactants selected from nonionic surfactants, anionic surfactants, and cationic surfactants. Is a nonionic surfactant and / or an anionic surfactant, and the content thereof is preferably 0.1 to 5% by weight.

  Nonionic surfactants include alcohol ethoxylate, fatty acid ethoxylate, alkylphenol ethoxylate, sorbitan ester, sorbitan ester ethoxylate, ethylene oxide / propylene oxide copolymer, glycol ester, glyceryl ester, polyglyceride and polyoxyalkylene glyceride ester. Although it is mentioned, it is not limited to these. The content of the nonionic surfactant in the antifoam composition is preferably 0.1 to 5% by weight.

  For anionic surfactants, alcohol sulfates, alkylaryl sulfonates, alkylbenzene sulfonates, ethoxylated alcohol sulfates, sulfates and sulfonates of ethoxylated alkylphenols, sulfates of fatty acid esters, sulfates of alkylphenols and Examples include sulfonates, sulfonates of condensed naphthalene, sulfonates of naphthalene, sodium derivatives of sulfosuccinates, alkali salts of petroleum sulfonates, and alkali phosphates. Absent. The content of the anionic surfactant in the antifoam composition is preferably 0.1 to 5% by weight.

  Cationic surfactants include primary, secondary and tertiary alkylamines, primary, secondary and tertiary alkylaminium salts (where the amine groups are substantially protonated in the formulation), quaternary Onium salts such as quaternary alkyl ammonium salts, and mixtures thereof are included. A wide range of primary, secondary, tertiary and zwitterionic alkyl amines and quaternary alkyl ammonium salts include, but are not limited to.

  The antifoam composition of the present invention can contain other additives, and the content thereof is preferably 0.1 to 5% by weight. Although it does not specifically limit about an additive, A stabilizer, a thickener, etc. are mentioned. Moreover, these additives may contain 1 type, or 1 or more types.

  Manure slurry is fermented in a processing facility and used as fertilizer. There are two fermentation methods, an aerobic fermentation type and an anaerobic fermentation type. Among them, the anaerobic fermentation type has little generation of foam and does not require an antifoaming agent. On the other hand, since the aerobic fermentation type promotes fermentation by blowing air into the sewage slurry, the blown air promotes the generation of bubbles, so an antifoaming agent is required.

  In the aerobic fermentation type manure processing facility, a manure injection nozzle is installed at a position higher than the liquid level of the manure slurry, and a nozzle for blowing air for promoting aerobic fermentation below the liquid surface of the manure slurry. Due to the high viscosity of the excrement slurry, even if the antifoam composition of the present invention is added, it does not reach the whole without stirring, and the defoaming performance may be limited. As countermeasures, an agitation facility is attached to the facility, or the nozzle is installed so that the angle between the tip of the manure injection nozzle and the tangent line of the facility outer periphery is 15 ° to 65 °, and the momentum of manure injected from the nozzle is used. Or stirring the manure in the facility. By these measures, the antifoaming composition of the present invention introduced from above the liquid surface of the excrement slurry is spread over the entire excrement slurry, and good antifoaming properties are obtained. Moreover, since the air blowing nozzle also promotes stirring, a good effect can be obtained by pouring the antifoaming composition of the present invention into the manure slurry together with air from this nozzle. By adopting either one or both of these two methods, the entire facility can maintain uniform and good defoaming performance.

  The antifoaming agent composition of the present invention can be used in a situation where the manure slurry is transferred from the aerobic fermentation type manure processing facility to the tank of the fertilizer facility, in addition to the use in the aerobic fermentation type manure processing facility. Foam generated when the manure slurry is charged overflows from the tank, and the manure slurry cannot be charged to the tank. Therefore, by adding a certain amount of the antifoaming composition of the present invention in accordance with the introduction of the manure slurry, the foam can be removed and the manure slurry can be introduced up to the tank full capacity, and an efficient fertilization operation is possible.

  The defoamer composition of the present invention should be charged into the tank in accordance with the dropping speed of the manure slurry so that the concentration becomes higher than the concentration at which the defoaming performance is exhibited. Since the antifoaming agent composition exhibits antifoaming performance in a very small amount, it is possible to dilute with water in advance if it is difficult to adjust the amount with the stock solution. The dilution factor is usually 50 to 500 times, preferably 70 to 200 times, more preferably 80 to 150 times. When the dilution ratio is less than 50 times, it becomes difficult to adjust the input amount of the antifoam composition with respect to the input speed of the manure slurry. On the other hand, when the dilution ratio exceeds 500 times, the amount of the antifoam composition diluted into the tank becomes large, and the amount of manure slurry that can be charged into the tank decreases, resulting in inefficiency.

  Since the antifoaming composition of the present invention exhibits antifoaming performance in a very small amount, the addition amount is preferably 2 to 30 ppm, more preferably 4 to 15 ppm with respect to the excrement slurry. Effective defoaming performance cannot be obtained at 2 ppm or less, and defoaming performance is constant regardless of the concentration at 30 ppm or more, so adding more than necessary is uneconomical.

  The following examples further illustrate the present invention.

<Production Example 1>
In a container, 49.75 parts by weight of a silicone emulsion (manufactured by Shin-Etsu Chemical Co., Ltd., trade name: KM-72F), 49.75 parts by weight of city water, and Proxel GXL (S) (manufactured by Arch Chemicals, benzothiazoline-3-one) An antifoam composition was obtained by adding 50 parts by weight and mixing well.

<Test Example 1>
Storing the manure into manure treatment facilities (Test Method) 2000 m ^3. Thereafter, in the example section, 15 L of Production Example 1 antifoam composition was added to livestock manure, and the foam breaking property was visually confirmed. The foam breaking property is evaluated in three stages, ○, Δ, and ×. ○ is 5% or less of the foam on the surface of the excrement in the entire manure processing facility, Δ is 5 to 50% of the foam on the surface of the urine, and × is 50 to 100 % Covered. After that, the treated livestock manure is transferred to the transfer tank, and the weight of the livestock manure that is loaded in the same volume tank is compared with the percentage of the untreated section when the working area is 100%. The foam suppression was evaluated. In the comparative example group, it processed similarly to the example group except not having added the antifoamer composition.

表１のように、実施例区では、高い破泡性及び抑泡性を発揮させることができ、移送時の積載重量が増えることにより、糞尿処理の省力化が可能であることが分かる。一方、比較例区では泡立ちを抑制する事が出来ず、タンク当たり積載量が減ってしまうため、省力化が困難であることが分かる。

As shown in Table 1, it can be seen that in the example section, high foam breaking property and foam suppressing property can be exhibited, and the load of manure can be saved by increasing the load weight during transfer. On the other hand, it can be seen that it is difficult to save labor in the comparative example section because foaming cannot be suppressed and the load per tank decreases.

<Test Example 2>
The antifoam composition 2L of the present invention was previously diluted with water to 200L. The manure slurry is sent to the transfer tank (capacity 13500L) attached to the fertilizer application at a transfer speed of 5400 L / min, and at the same time, the antifoam composition dilution is 7 ppm with respect to the manure slurry at 3.8 L / min. It was put into the tank. As a result, it was possible to fill the entire tank with sewage slurry without the generation of a large amount of foam.

Claims (12)

An antifoaming composition comprising 5 to 50% by weight of a silicone resin and 50 to 95% by weight of water. An antifoam composition comprising 5 to 50% by weight of a silicone resin, 0.1 to 5% by weight of a preservative, and 45 to 94.5% by weight of water. The antifoam composition according to claim 2, wherein the preservative according to claim 2 is benzothiazolin-3-one. The antifoaming composition according to any one of claims 1 to 3, wherein the silicone resin according to claims 1 and 2 is one selected from the group consisting of organosiloxane, polyorganosiloxane, and polysiloxane. The defoamer composition according to any one of claims 1 to 4, wherein bubbles generated in a tank of a manure facility and a fertilizer facility that disperses manure as fertilizer are suppressed and broken. The manure facility according to claim 5 is an aerobic fermentation-type manure facility, wherein the manure in the manure processing facility is convected in a circular pattern on a horizontal plane, and the convection manure surface is any one of claims 1 to 5 The usage method of the antifoamer composition which adds the antifoamer composition of one term. The antifoaming agent composition according to any one of claims 1 to 5, wherein the antifoaming agent composition according to any one of claims 1 to 5 is added from an air inlet of an aeration treatment facility attached to the aerobic fermentation-type manure facility. how to use. The manure facility according to claim 5 is an aerobic fermentation type and an anaerobic fermentation type manure facility, and when transferring manure from the manure facility to a fertilizer tank, a certain amount is automatically adjusted in accordance with the transfer speed. The use method of the antifoamer composition as described in any one of Claims 1-5 added while adjusting to. The method of using the antifoaming composition according to claim 8, wherein the antifoaming composition according to any one of claims 1 to 5 is diluted 50 to 500 times with water in advance. The antifoamer composition as described in any one of Claims 6-9 which adds the antifoamer composition as described in any one of Claims 1-5 so that it may become a density | concentration of 2-30 ppm with respect to excrement. How to use things. The transfer speed of manure from the manure facility according to any one of claims 5 to 6 and claim 8 to the fertilizer tank is 2000 to 8000 L / min. Use method of the antifoamer composition of description. The method for using an antifoam composition according to any one of claims 6 to 11, wherein the solid content of manure is 10% or more.