JPS6027673A - High fat content fertilizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-fat fertilizer with good fertilizing properties, which is used in wool washing, and whose active ingredient is residual solid content recovered from washing wastewater after collecting wool fat.

Conventionally, solvent cleaning methods, which are more efficient than water washing, have been sometimes used to wash raw wool, but the solvent washing effluent after washing contains impurities such as wool fat, fine mud and sand, and excrement. Contains. Therefore, the method for treating this solvent washing waste liquid is to centrifuge it to separate it into the solvent and slurry-like wool sludge, collect the dissolved wool fat from the solvent, and dry the wool sludge to solidify the remaining wool. Although the molded materials are disposed of in landfills or incinerated, the present inventors have found that the residual solids contain ingredients effective as fertilizers and that they can be made to be good by containing a specific amount of wool fat. They found that it is possible to provide fertilizer and completed the present invention.

That is, the present invention is a high fat-containing fertilizer characterized in that the active ingredient is residual solid content, which is recovered from the washing waste liquid after collecting wool fat in wool washing and contains 10 to 25% by weight of wool fat. .

The present invention will be explained in detail below.

The residual solid content in the wool cleaning process of the present invention is obtained by centrifuging the washing waste liquid obtained by washing the raw wool using a solvent, etc., and creating a slurry containing the liquid content before the solvent and the residual solid matter in which the wool fat is dissolved. After separating the sludge from wool sludge, the sludge is dried to obtain a solid material such as powder or granules.

The composition of the residual solid content varies depending on the origin of the raw wool, breed, growing climate conditions, etc., but is generally as follows: 0 Total amount of nitrogen: 3 to 4% by weight Water-soluble potash: 9 to 15 N Wool fat: 10 to 25 N Moisture: 2 ~5 Others (organic substances, etc.) Remaining amount In the composition of the above residual solids, the content of wool fat in the wool sludge in general wool washing is usually 1 to 20% by weight, but the content of wool fat in the residual solids of the present invention is Wool fat content: 1
To adjust the wool fat content to 0 to 25% by weight, the degree of separation must be adjusted when centrifuging the wool washing waste fluid, or the wool fat content must be adjusted to 10% by weight.
If the amount is less than % by weight, wool fat may be added separately.

Nitrogen and potash are effective fertilizer ingredients, and potash in particular has a high content in the form of water-soluble carbonates, chlorides, and sulfates, making it ideal as a potash material containing organic matter. .

On the other hand, the residual solid content contains 10 to 25% by weight of wool fat, which is an oil content, so the fat content surrounds nitrogen and potassium components and has the effect of converting the fertilization property from fast-acting to slow-acting. If it is within the above range, then when used as a fertilizer, the decomposition product of wool fat will not have the same harmful effect on the respiration of plant roots, but if it is less than 10% by weight, the rate of fertilizer effect will be faster. As the temperature increases, the granulation property (adhesiveness) decreases, and 25
If the weight percentage is exceeded, the effectiveness of the fertilizer becomes too slow and the fertilizer becomes ineffective, and it becomes necessary to dry and obtain the fertilizer.

The high fat content fertilizer of the present invention is a product obtained by drying the residual solid content, or a compound fertilizer product obtained by blending other nitrogen and phosphoric acid fertilizers with the residual solid content and drying it, and there is no particular restriction on its form. Powder, granule, or block forms are preferable because they are easy to handle.

Particularly in granular form, it is easy to mix with other fertilizers and soil. For example, when mixed with phosphate fertilizer or nitrogen fertilizer, a fertilizer with the same effect as a compound fertilizer can be easily obtained, and it is also easy to mix with soil, making it easy to mix with soil. The soil forms good aggregates and exhibits excellent air permeability, water permeability, and water retention.

Next, an example of a method for producing a dud-high fat content fertilizer is shown below.
The solvent washing waste liquid obtained by washing the raw wool with a solvent is centrifuged to separate it into a slurry-like wool sludge containing the solvent in which the wool fat is dissolved and the residual solids. This wool sludge usually has a viscosity of 200,000 to 300,000. OOOmpa-s contains 30% by weight of water and 20-50% by weight of solvent. Next, the wool fat content of the wool sludge is set to 10 to 2.
After adjusting to 5% by weight and adding nitrogen and phosphoric acid fertilizer as necessary, it is placed in a closed paddle type agitation dryer, with an internal temperature of 90 to 120°C and a paddle movement speed of 5 to 15 TL/s.
After heating and drying using an EC for 10 to 30 minutes to granulate the product at the same time as drying, the product is separated from the solvent vapor using a dust collector and cooled to obtain a product. Solvent vapor is condensed and recovered in a condenser. If necessary, the granular solid may be sieved to adjust the particle size to a desired size.

As explained above, the present invention makes it possible to effectively utilize the residual solids of the washing effluent, which is an industrial waste discharged during wool washing, as a fertilizer, and the obtained high fat content fertilizer is effective. It is an excellent slow-release fertilizer with a large yield.

Next, the present invention will be explained in more detail with reference to Examples. However, % indicates weight %.

Example: Using 1,1,1-trichloroethane as a solvent to wash raw wool, the washing waste was centrifuged to give a water content of 45% by weight.
Viscosity 200.000 mp containing 515% by weight of solvent
A slurry-like wool sludge of a-s was obtained. After adjusting the wool fat content of the wool sludge, it was introduced into a paddle-type stirring dryer at a rate of 3.85 t/m]n, and the paddle moving speed was 7.8 m/Sec%, and the drying temperature of the jacket was 105.
After drying at ℃ for 20 minutes, the solvent was separated through a dust collector and cooled to room temperature to obtain a granular product. Its composition and physical properties are shown in Table 1.

Table 1 Next, 5 tests were conducted on young plants using the high-fat fertilizer mentioned above Test method (1) Test scale Pot test (Neubauerbott) (
2) Test crop Komatsuna (3) Test soil Alluvial and field soil topsoil (air-dried through a sieve) is used, and the amount of soil per pot is 500 m1.

Characteristics of the test soil (4) Setting up the test area The application amount per pot of the product of the present invention is 100.2% as potassium.
00.400 and 800 Kui 1.1 equivalents. or,
A 74% product with a low wool fat content was used as a control product, and test plots similar to those above were set up, as well as a non-applied plot.

(5) Test plot and its contents (6) Treatment of test plot 500 ml of soil (6405'
), add the product of the present invention and the anti-leisure product, and mix it throughout the soil.

After irrigating with water equivalent to 60% of the maximum water capacity, 20 Komatsuna seeds are sown, and after germination, they are thinned out to a stand of 15 plants.

Water management during the cultivation period involves measuring the weight of the pot, replenishing the lost amount of water, and maintaining the water within a range of 50 to 70% of the maximum water capacity.

(7) Cultivation schedule Soil filling, fertilization, sowing, thinning, cultivation ends on September 29th
September 29th October 71st October 21st (8) Test results The results of germination investigation (germination vigor, germination rate) and growth investigation (plant height, leaf length, number of leaves, stem and leaf type) are shown in Table 3. show.

As can be seen from the results shown in Table 3, when the high fat content fertilizer of the present invention is used, it is superior to the non-applied product in terms of germination and growth, almost the same as the control product, and growth improves with an increase in the application amount, resulting in excessive application. It can be seen that there is no concentration disturbance due to

Sender: Asahi Kasei Industries, Ltd. Toa Boseki Co., Ltd. Agent Yutaka Tayoshi Riri C

Claims (1)

[Claims] 1) A high fat-containing fertilizer characterized in that the active ingredient is a residual solid content recovered from the washing waste liquid after collecting wool fat in wool washing and containing 10 to 25% by weight of wool fat.