JPH07185318A - Deodorant material and its deodorizing and fertilizer making method - Google Patents

Abstract

PURPOSE:To remove malodor from stock raising excreta, etc., and to convert it in to an useful resources such as fertilizer by essentially constituting a deodolant material with a phosphoric acid compd. and iron sulfate which make a malodorous source nonvolatile and a magnesium compd. which makes the nonvolatile compd. hardly soluble. CONSTITUTION:This deodolant material is essentially composed of the phosphoric acid compd. and iron sulfate which make the malodorous source nonvolatile and the magnesium compd. which makes the nonvolatile compd. hardly soluble, In this case, calcium perphosphate and triple calcium superphosphate are used as the phosphoric acid compd., and magnesium sulfate, magnesium hydroxide, magnesium oxide and magnesium phosphate, etc., are used as the magnesium compd. And, the deodolant material consisting essentially of the phosphoric acid compd. and iron sulfate which make the malodorous source nonvolatile and the magnesium compd. which makes the nonvolatile compd. hardly soluble are added to the stock raising excreta, and after removing the malodor, the material is dehydrated and dried to make the fertilizer. In this case, the deodolant material is added to a sediment, etc., of the stock raising excreta together with a porous silicic substance, activated carbon, etc..

Description

Detailed Description of the Invention

[0001]

The present invention relates to ammonia, amines, hydrogen sulfide, various kinds of wastes including livestock excrement,
A deodorant material for malodorous substances that changes mercaptan, phenol, volatile organic acids, etc. to non-volatile compounds and makes them less soluble to remove the malodorous substances originating from these and also can be used as fertilizer. The present invention relates to a method for producing a deodorant fertilizer.

[0002]

2. Description of the Related Art In the livestock industry, the offensive odor generated from the excrement is remarkable, and further, the excrement contaminates groundwater, resulting in eutrophication of rivers and lakes, which is a major cause of environmental pollution. ing. In order to remove this malodor, various improvement methods have been tried so far, for example, a method of adding a substance that adsorbs the malodor to the feed of livestock, a method of masking the malodor by spraying a fragrance, or a malodor. A method of decomposing a source with a microorganism is known. However, the above-mentioned conventional methods are in the present situation in which sufficient effect cannot be obtained even though a large processing cost is required because the malodorous substances differ greatly depending on the kind of animals and the method of breeding management.

Instead of a method of adsorbing or decomposing a malodorous source,
Attempts have also been made to eliminate malodors by reducing the amount of excreted livestock, and to reduce the amount of protein supplied, by giving amino acids, or by using phytase to increase the utilization rate of organic phosphorus in the feed. A method of reducing excretion has been proposed, but it is far from practical use.

[0004] On the other hand, in terms of practical use in removing the bad odor to improve the livestock environment, it is required that the environment can be improved at a low cost and that the treated product can be widely reused as a general fertilizer for agriculture. Furthermore, it is necessary that the natural environment is not polluted even if the wastewater after the malodor removal treatment is discharged.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and uses a deodorizing material that removes offensive odors from livestock excrement, etc., and turns them into useful resources such as fertilizers. The purpose is to provide a materialization method. The inventor has found that the basic odor source in livestock excrement is ammonia,
Amine, hydrogen sulfide, mercaptan, phenol and volatile organic acids, which can suppress odors by adding phosphoric acid compounds or iron sulfates to non-volatile compounds, and by adding magnesium compounds, these It has been found that the water becomes insoluble and can be effectively used as a fertilizer if it is dehydrated, and there is no risk of causing secondary pollution even if the treated wastewater is discharged.

[0006]

The present invention is based on the above findings,
According to the present invention, there are provided a deodorizing material having the following constitution and a deodorizing material producing method using the deodorizing material. (1) A deodorizing material mainly composed of a phosphate compound and an iron sulfate salt that make a malodor source non-volatile, and a magnesium compound that makes a non-volatile compound hardly soluble. (2) The deodorizing material according to (1) above, which uses lime superphosphate or lime superphosphate as the phosphate compound. (3) As the magnesium compound, magnesium sulfate,
The deodorizing material according to (1) or (2) above, which uses magnesium hydroxide, magnesium oxide and magnesium phosphates. (4) A deodorizing material containing a phosphate compound and an iron sulfate salt that make the malodor source non-volatile as the main component and a magnesium compound that makes the non-volatile compound hardly soluble is added to livestock excrement to remove the malodor, and then dehydrated. A deodorizing fertilizer method of drying and fertilizing. (5) The above-mentioned deodorizing material is added together with a porous silicic acid substance, activated carbon, a flocculant, a bactericide or an fragrance to a deposit of livestock excrement, a storage or spraying tank or an outflow ditch.
The deodorizing fertilizer method of (4).

[0007]

[Detailed description] The type and content of the offensive odor-causing substances contained in livestock excrement differ depending on the type of livestock animal and the breeding environment, but the basic malodorous substance common to the excrement of each animal is ammonia. , Trimethylamine, hydrogen sulfide, methyl mercaptan, methyl sulfide, volatile organic acids. Of these, ammonia is diammonium phosphate [(NH ₄ ) ₂ HP due to the phosphate compound contained in the deodorizing material of the present invention.
It changes to O ₄ ] and becomes a non-volatile compound, so the ammonia odor is removed. Here, diammonium phosphate is water-soluble, but due to the magnesium compound contained in the deodorizing material of the present invention, diammonium phosphate changes to magnesia ammonium phosphate [MgNH ₄ PO ₄ ] at pH 6.0 to 8.5. ,
It becomes insoluble. By dehydrating this, it can be used as fertilizer. In addition, the magnesium compound has an effect of converting butyric acid which is a malodorous component in excrement into odorless magnesium butyrate. As the phosphoric acid compound, it is possible to use lime superphosphate, lime superphosphate and the like. As the magnesium compound, magnesium sulfate, magnesium hydroxide, magnesium oxide, magnesium phosphates and the like can be used. When lime superphosphate is used as the phosphate compound, about 50 wt% or more of calcium sulfate exists in the lime superphosphate, and this also acts as a flocculant for the deodorized product. Also, when using magnesium phosphates, by adding magnesium oxide or magnesium hydroxide in an amount equivalent to magnesium phosphate to commercially available fertilizer superphosphate or hyperperphosphate, the cost can be reduced. Can be reduced and the processing steps can be saved.

Sulfur compounds in livestock excrement are reduced anaerobically to generate hydrogen sulfide, which becomes a source of malodor. The iron sulfate salt contained in the deodorizing material of the present invention reacts with this hydrogen sulfide to form a non-volatile sulfide, and removes a bad odor.
Further, lower fatty acids, which are other sources of malodor, also react with iron sulfate to form odorless iron compounds. As the iron sulfate salt, ferrous sulfate (FeSO ₄ .7H ₂ O) or the like can be used.

The compounding amounts of the phosphoric acid compound, the iron sulfate salt and the magnesium compound in the deodorizing material of the present invention are appropriately determined depending on the kind of the malodorous substance to be used, but the following compounding amounts are generally acceptable. (1) Over phosphate of lime (17.0 percent phosphoric acid) 650 g magnesium oxide (90% MgO) 50 g of ferrous sulfate _{(FeSO 4 · 7H 2 O)} 350g (2) monocalcium phosphate (42% phosphoric acid) 360 g Magnesium sulfate (MgO 25%) 280 g Ferrous sulfate 360 g Magnesium oxide (MgO 90%) 200 g (3) Lime superphosphate 1.1 g Magnesium sulfate 0.5 g Ferrous sulfate 1.0 g Magnesium oxide 0. 2 g The deodorizing material of the present invention is used in an amount sufficient to render the malodor source non-volatile and sparingly soluble in livestock excrement and the like. For example, as shown in Examples described later, nitrogen 29
It is sufficient to add about 800 g to 2.5 kg of the deodorizing material of the present invention to 50 liters of dairy cow excrement slurry containing 0 g.

When the deodorizing material of the present invention is used in combination with a porous silicic acid substance such as zeolite or tobermorite, the deodorizing effect can be further enhanced. Conventionally, zeolite,
It has been attempted to reduce the malodor by spraying a porous silicic acid substance such as tobermorite on the malodorous substance to adsorb the malodorous source and moisture, but the adsorption capacity is limited and the addition amount is also limited. Does not provide sufficient odor removal effect. However, if the zeolite is added to the deodorizing material of the present invention, and a porous silicate substance such as tobermorite is used,
Since most of the malodorous source is made non-volatile by the deodorizing material of the present invention, when a slight malodorous source remains, it is adsorbed by the porous silicic acid substance and the malodorous removing effect is further improved.

The deodorizing material of the present invention may be used by gradually adding a predetermined amount to an outflow ditch of livestock excrement, or in a deposit of excrement, a storage tank of the excrement or a spraying tank. You may throw in and use the required amount directly. Further, activated carbon, a coagulant, a bactericide, an aromatic and the like may be blended and used together with the deodorizing material of the present invention. The addition of these enhances the deodorizing effect of the present invention and does not impair the effect of each additive.

The livestock excrement from which the malodor has been removed by the deodorizing material of the present invention can be effectively used as fertilizer. Livestock farmers need large amounts of fertilizer to grow feed forage for livestock. Therefore, in general, in order to utilize livestock excrement and the like as organic fertilizer, this excrement is taken out from a livestock shed together with spread straws, etc., and accumulated and composted. However, there is a problem that a bad odor such as excrement is severe and the working environment is significantly deteriorated. When the deodorizing material of the present invention is used, the bad odor is effectively removed, and therefore such a problem does not occur during the composting period. Furthermore, when the deodorizing material of the present invention is used, ammonia, phosphoric acid and potassium components in livestock excrement are contained in place of sparingly soluble compounds, and these are also useful as a slow-release fertilizer. Since it is contained as ammon or potassium phosphate phosphate, it can be used as effective nitrogen, phosphate, potash and magnesium fertilizer if dehydrated and dried after removing the bad odor by adding the deodorizing material of the present invention. You can It should be noted that when the iron sulfate is blended with a sufficient amount of a phosphoric acid compound, the phosphoric acid inactivating effect is suppressed, there is no adverse effect on the crop, and rather the effect of supplying iron to the crop is observed.

[0013]

EXAMPLES Test examples and examples of the present invention will be shown below. It should be noted that this embodiment is merely an example and does not limit the scope of the present invention. Test Example A dairy cow excrement slurry containing 290 g of nitrogen was used as an undiluted solution, and 100 g of this undiluted solution was used in the amounts shown in Table 1 for lime superphosphate, lime superphosphate, ferrous sulfate, magnesium sulfate, magnesium hydroxide and Magnesium oxide was added and the deodorizing effect was investigated. The results are summarized in Table 1. Similar stock solution
The deodorizing material according to the present invention (Sample No. 11) shown in Table 2 was added to 100 g, and the deodorizing effect was examined. The results are shown in Table 2. As shown, the above-mentioned additives exhibited an excellent deodorizing effect, and in particular, the deodorizing material of the present invention was confirmed to have a deodorizing effect superior to those using the above-mentioned additives individually.

[0014]

[Table 1]

[0015]

[Table 2]

EXAMPLE 1 Commercially available lime superphosphate (SP17.0%) 650 kg, commercial magnesium oxide for fertilizer (containing MgO 90%) 50 kg and ferrous sulfate (FeSO ₄ .7H ₂ O) 350 kg were mixed. Water was added to 2.5 kg of deodorizing material to make a slurry, and this was added with nitrogen 2
The mixture was added and mixed into 50 liters of dairy cow excretion slurry containing 90 g. The pH of the excretion slurry was 7.6, but mixed 10
After about 15 minutes, the odor of excrement disappeared. P after processing
H was 6.5. After the treatment, the recovered amount of the reaction product was about 3.0 kg in terms of anhydride. The nutritional components in the recovered treated product are N: 9.0%, P ₂ O ₅ : 9.1%, K _{2 in} terms of anhydride.
O: 9.0%, MgO: 3.2% and Fe: 3.5%. Using this pot fertilized with an amount equivalent to 400 kg per field 10a, Komatsuna was cultivated, and the growth rate was compared with that obtained by adding ammonium sulfate, overstone, and sulphate to the same components. With the fertilizer of the invention, a high yield index of 115 was shown, compared to 100 when used.

Example 2 360 kg of commercially available lime superphosphate (SP42%), 280 kg of ferric sulfate magnesia (containing 25% of MgO) and ferrous sulfate (FeSO ₄₎
・ 7H ₂ O) 360 kg mixed 800 g, suspended in water, and then dairy cow excretion slurry 5 containing 290 g nitrogen 5
The mixture was added and mixed in 0 liter (pH 7.6). 10 to 15 minutes after mixing
H was about 6.3. The ammonia odor was completely eliminated by the above treatment, but a slight odor peculiar to excrement was recognized. Then, as a result of adding and mixing 200 g of magnesium oxide powder for commercial fertilizer (containing 90% of MgO) thereto, the malodor disappeared. The pH after the treatment was 6.7. The amount of the recovered reaction product was 1.5 kg in terms of anhydride. The amount of nutritional components in the obtained treated product was N: 19.0%, P _{2 in} terms of dry matter.
_{O 5: 11.3%, K 2} O: 16.0%, MgO: 15.1% and Fe: was 3.5%. This product could be easily granulated with a simple granulator without the need of using a binder. When the granulated and dried product was used as a high-performance compound fertilizer containing minerals for the cultivation of grass and general crops, a high yield was achieved as in Example 1.

[0018]

According to the deodorizing material of the present invention, it is possible to effectively remove the malodor of livestock excrement and the like, and the malodor source is contained as a sparingly soluble compound. Since there is no problem of secondary pollution of the environment and the untreated product from which the bad odor is removed contains fertilizer components such as nitrogen, phosphoric acid and potassium, it can be effectively used as a slow-release fertilizer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B01D 53/81 B01J 20/04 C B09B 3/00 ZAB C05F 3/00 7537-4H 17/00 C09K 3/00 S

Claims (5)

[Claims] 1. A deodorizing material containing a phosphate compound and an iron sulfate salt for making a malodor source non-volatile, and a magnesium compound for making a non-volatile compound hardly soluble, as main components. 2. The deodorizing material according to claim 1, wherein lime superphosphate and lime superphosphate are used as the phosphate compound. 3. The deodorizing material according to claim 1, wherein magnesium sulfate, magnesium hydroxide, magnesium oxide and magnesium phosphates are used as the magnesium compound. 4. A deodorizing material containing, as a main component, a phosphate compound and an iron sulfate salt which make a malodor source non-volatile and a magnesium compound which makes the non-volatile compound hardly soluble is added to livestock excrement to remove the malodor. A deodorizing fertilizer method of dehydrating, drying and fertilizing. 5. The deodorizing agent according to claim 4, wherein the deodorizing material is added to a sediment of livestock excrement, a storage or spraying tank, or an outflow ditch together with a porous silicic acid substance, activated carbon, a flocculant, a bactericide or an aromatic agent. Fertilization method.