JP3378412B2 - Manufacturing method of organic fertilizer - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing an organic fertilizer using livestock waste and / or activated sludge as a material to be fermented, and an organic fertilizer obtained thereby. More specifically, the present invention uses at least one of livestock waste and activated sludge, which have conventionally been difficult to handle, as a raw material to be fermented, and produces a high-quality organic fertilizer having excellent fertilization efficiency by a specific process. The present invention relates to a method for producing an organic fertilizer that can be smoothly produced in a short period of time, and an organic fertilizer obtained thereby.

[0002]

2. Description of the Related Art Chemical fertilizers which have been used frequently until now have problems such as poor growth and withering of plants due to concentration disturbance, soil loss due to continuous use, environmental pollution and the like although they have immediate effects. Therefore, organic fertilizers have been reviewed in recent years as a solution to such drawbacks of chemical fertilizers. On the other hand, in animal husbandry and the like, a large amount of animal excrement such as chicken dung, pig dung, and cow dung is discharged, and a large amount of activated sludge is discharged by microbial treatment of organic waste. The handling and treatment of these animal excrements and activated sludge have been difficult, and various attempts have been made to produce organic fertilizer using animal excrements and activated sludge from the viewpoint of smooth treatment and effective utilization. Has been.

When organic fertilizers obtained by fermenting animal excrement or activated sludge are used, unlike the case where chemical fertilizers are used, soil fertility is promoted and plant growth is promoted. Has the merit that it does not cause soil thinning and does not cause environmental pollution. However, animal excrement and activated sludge have a high water content, various components are mixed, and their pH is unstable, so the balance of the microbial flora contained therein tends to be biased. Therefore, it is difficult for useful microorganisms that work effectively in fermentation to grow. Therefore, the air permeability is deteriorated to become an anaerobic state, the fermentation does not proceed smoothly, and an odor is likely to be generated over a long period of time. Especially in winter when the ambient temperature is low, the fermentation does not proceed easily, and it takes a longer time for composting.

Therefore, in the production of organic fertilizers using animal excrement or activated sludge, the fermentable raw materials are mixed with plant organic matter such as sawdust, barley, rice straw, and litter, and then water is added. The method of fermenting after adjusting the content is generally adopted. However, since plant organic matter such as sawdust contains a large amount of persistent components, when mixed with animal excrement or activated sludge and fermented, it usually takes 3 to 6 months to obtain ripe compost. The disadvantage is that it takes a long time. Moreover, there is a drawback that the phenolic acid component generated by the decomposition of the lignin component contained in the plant organic matter is contained in the organic fertilizer, and the growth of plants is inhibited by the phenolic acid component.

Therefore, in order to improve the above-mentioned drawbacks, a compost and an animal or vegetable oil or their waste oils are added to and mixed with an organic waste having a high water content such as livestock excreta to adjust the water content to 65% or less. And fermenting to produce compost (Japanese Patent Publication No. Sho 55-37517), organic sludge discharged from a livestock processing plant or the like is mixed with rapeseed oil cake and / or castor oil cake as a water content adjusting agent to have a water content of 55. There has been proposed a method of producing an organic fertilizer by adjusting the content to ˜65% and fermenting it (Japanese Patent Laid-Open No. 3-290386). However, in the case of these conventional methods, in order to reduce the water content of organic waste such as livestock manure and organic sludge to be suitable for fermentation, it is possible to use relatively expensive animal and vegetable oils and fats thereof. Since it is necessary, it is costly, uneconomical, and has a drawback that a large amount of ammonia is generated during fermentation and the odor is strong.

[0006]

SUMMARY OF THE INVENTION Under the above circumstances, the present inventors have
We have been investigating for a method that can smoothly promote the composting of livestock waste such as livestock manure and other organic waste. As a result, a product obtained by blending organic substances such as wheat bran having an arabinoxylan content of 20% by weight or more, slaked lime, humic acid and specific microbial materials in a specific ratio is used as livestock waste or other organic waste. It was found that it can be converted into an organic fertilizer having a high fertilizing effect in a short period of time and that it is extremely effective as a fermentation accelerator, and applied for it earlier (Japanese Patent Application No. 6-251532 and Japanese Patent Application No. 6-251532). 312411).

The present inventors have further studied various aspects of composting of organic waste such as livestock waste. As a result, among organic wastes, when livestock wastes and / or activated sludge is used as a material to be fermented, the pH thereof is in the range of 7.0 to 8.5 and C /
While maintaining the N ratio within the range of 20 or less, its water content is 55
After adjusting to the range of up to 65% by weight, wheat bran is added as a fermentation auxiliary agent to the mixture, and the fermentation is performed without using a special fermentation device, while suppressing the generation of odor, etc. It was also found that an organic fertilizer having a high fertilizing effect can be produced in a short period of time and economically. Furthermore, the present inventors at that time, instead of using wheat bran alone as a fermentation aid, the above-mentioned fermentation accelerators that the present inventors previously developed for wheat bran (that is, arabinoxylan content is 20% by weight). Organic matter such as wheat bran, slaked lime, fermentation promoter consisting of humic acid and a specific microbial material) is used as a fermentation aid a wheat bran mixture, or minerals, slaked lime, humic acid in wheat bran, When a wheat bran mixture containing one or more of microbial materials and other components having a fermentation promoting action is used as a fermentation aid, an organic fertilizer that is more excellent in fertilizing effect from livestock waste and / or activated sludge The present invention has been completed based on the findings that they can be obtained smoothly in a shorter fermentation period.

Therefore, the present invention is a method for producing an organic fertilizer by using livestock waste and / or activated sludge as a raw material to be fermented, which comprises (i) livestock waste and / or
Alternatively, the water content of the fermented raw material composed of activated sludge is set to 55 to
65 wt%, pH 7.0-8.5 and C / N ratio 2
A step of adjusting to 0 or less; and (ii) a fermentation auxiliary material consisting of wheat bran or a wheat bran mixture mainly consisting of wheat bran is added to the product obtained in the above step (i), livestock waste and / or activated sludge. A method for producing an organic fertilizer, comprising the step of adding 25 to 50 parts by weight of wheat bran (dry matter equivalent) to 100 parts by weight of fermented raw material (dry matter equivalent) and fermenting it. Is. And this invention includes the organic fertilizer manufactured by the said method.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. Here, "livestock waste" used as a material to be fermented in the present invention, pigs, cattle, horses, sheep, goats, manure produced during the raising and production of other livestock, chicken, quail, turkey,
It may be manure produced during the breeding or production of poultry such as ducks, mallards, ducks, or the waste discharged from the above-mentioned livestock or poultry processing plants (eg, slaughter, slaughter, processing plants, etc.). May be.

In the present invention, activated sludge can be used as the material to be fermented, but the kind and content of activated sludge are not limited at all. That is, as a method for treating or purifying an organic waste liquid, an activated sludge method that performs aerobic biological treatment using activated sludge in the presence of air or oxygen is widely known, and the activated sludge method is, for example, food production. It is widely used in various fields such as industry, textile industry, pulp and paper industry, chemical industry, leather manufacturing industry, and sewage treatment plants. Then, when the organic wastewater or sewage of various industries described above is treated by the activated sludge method, a large amount of activated sludge is discharged as excess sludge in the treatment process. Any of the activated sludge produced as excess sludge by the activated sludge method can be used, and the origin thereof and the properties of the activated sludge are not limited at all.

In the present invention, as the raw materials to be fermented, the livestock waste and the activated sludge may be used alone, or the livestock waste and the activated sludge may be mixed and used. The mixing ratio of the two is not limited at all.

In the present invention, the above-mentioned step (i) [hereinafter this may be referred to as "conditioning step (i)") is first performed on the fermented raw material composed of livestock waste and / or activated sludge. The water content, pH and C / N ratio of the livestock waste and activated sludge before the adjustment step (i) may differ depending on the origin and type of the livestock waste and activated sludge, but generally the water content is 70% by weight or more, mostly 75-
85% by weight, pH about 5-9, and C / N ratio about 5
In the present invention, the water content, pH and C / N ratio are adjusted in the adjusting step (i) so that the water content is 55 to 65% by weight, the pH is 7.0 to 8.5 and C. /
A product having an N ratio of 20 or less, preferably 10 to 20 (hereinafter, this may be referred to as “adjusted product”).

In the present invention, the water content of the raw material to be fermented consisting of livestock waste and / or activated sludge before the adjustment step (i) and the water content of the adjusted product are
It is the value of the weight loss rate when dried at 130 ° C. for 2 hours,
The details are as described in the examples below. Further, C / N of the raw material to be fermented consisting of livestock waste and / or activated sludge before carrying out the adjusting step (i) in the present invention
The ratio and the C / N ratio of the adjusted product are the values when the total carbon (C) amount and the total nitrogen (N) amount are obtained by the C / N coder and expressed as the ratio (C / N). Yes, the details are as described in the examples below. Furthermore, the pH of the raw material to be fermented consisting of livestock waste and / or activated sludge before carrying out the adjusting step (i) in the present invention, and the p of the adjusted product
H is a value measured at room temperature (25 ° C.).

Generally, when the water content of livestock waste and / or activated sludge is reduced, the pH of the sludge also changes greatly, and in some cases the C / N ratio may increase greatly. In the invention, in the adjusting step (i), it is necessary to adjust the above-mentioned numerical value, that is, the C / N ratio to 20 or less, preferably 10 to 20.

P of the preparation product obtained in the preparation step (i)
If H is less than 7.0 or exceeds 8.5,
In the next step (ii), the useful microorganisms that promote composting do not work smoothly, and it becomes impossible to obtain a high-quality, high-quality organic fertilizer in a short period of time. In order to smoothly carry out the next step (ii) (fermentation step) in a short period of time, the pH of the adjusted product obtained in the adjusting step (i) is preferably in the range of 7.5 to 8.0. Further, if the water content of the adjusted product obtained in the adjusting step (i) is less than 55% by weight, the fermentation may not be sufficiently performed, and the fermentation may be stopped.
On the other hand, if it exceeds 65% by weight, anaerobic fermentation becomes strong, and as a result, the fermentation rate of the compost is reduced, and in any case, in the next step (ii), the fermentation is smoothly carried out in a short period of time, resulting in good quality. The organic fertilizer will not be available in a short fermentation period. In order to smoothly perform the following step (ii) (fermentation step) in a short period of time, the water content of the adjusted product obtained in the adjusting step (i) is preferably in the range of 58 to 63% by weight.

Furthermore, when the C / N ratio of the adjusted product obtained in the adjusting step (i) is higher than 20, the next step (i
In i), the fermentation will not be carried out smoothly in a short period of time, making it impossible to obtain good quality organic fertilizer in a short fermentation period. The adjusted product has a C / N ratio of 10 to 20 in the following step (ii)
Is preferable in that the fermentation can be smoothly carried out in a short period of time, and that the amount of the fully-ripened fermented compost used in the adjusting step (i) and the amount of minerals described below are small, which is economical and the like.

In the adjusting step (i), p of the adjusted product is
The water content of the adjusted product is adjusted so that H does not change much from the pH of the raw material to be fermented consisting of livestock waste and / or activated sludge, and the C / N ratio of the adjusted product does not become higher than that before the adjustment. As a method for adjusting the content to a range of 55 to 65% by weight, fully fermented compost (generally, the water content is 40
Is about 50% by weight and the C / N ratio is 20 or less).
Is added to a fermented material consisting of livestock waste and / or activated sludge at a rate such that the adjusted product has a water content of 55 to 65% by weight; Minerals such as vermiculite, perlite, zeolite and diatomaceous earth are used as raw materials, and the water content of the product is 55-6.
Method of adding in a ratio so as to be in the range of 5% by weight; the ripe fermented compost used in the above method and the above-mentioned minerals are added to a fermented raw material composed of livestock waste and / or activated sludge as an adjusted product. Has a water content of 55-65
A method of adding it at a ratio such that the weight% is obtained can be preferably adopted.

As the fully-ripened fermented compost used in the above methods and, any fully-ripened fermented compost having a C / N ratio of 20 or less can be used, and its preparation method and origin are not particularly limited. Among them, the process (i
It is convenient and preferable to use a part of the organic fertilizer obtained through i) in the form of so-called "return compost" as the ripe fermented compost in the above methods and. In performing the adjusting step (i), the C / N ratio is 20
If a higher unripe compost is used, the fermentation in the next step (ii) becomes unstable and it becomes difficult to obtain a good quality organic fertilizer in a short period of time. Moreover, since the water content of unripe compost is usually high at 55% by weight or more, if an attempt is made to perform the adjusting step (i) using the unripe compost, it is necessary to add a large amount of unripe compost in the adjusting step (i). It requires a large amount of work and is not desirable in terms of cost.

If the cost is not a problem, the above-mentioned method in which the adjusting step (i) is carried out by using a mineral such as vermiculite, perlite, zeolite or diatomaceous earth, or a fully fermented compost and the mineral are used. It is desirable to carry out by the above-mentioned method in which the above are used in combination, and the particular method is desirable. When a mineral is used, one type of mineral may be used, or two or more types may be used in combination. The above-mentioned mineral has a porous structure, is excellent in water absorption, can maintain the fermented material in an aerobic environment, and further, the mineral itself is not decomposed p
Has little effect on H and C / N ratio. Therefore, when the adjusting step (i) is performed using the mineral as described above, the adjusted product has a pH of 7.0 to 8.5 and a C / N ratio of 20.
Its water content can easily be adjusted to 55-65% by weight, keeping below. Moreover, the adjusted product obtained thereby has good fermentation characteristics, and the fermentation of the next step (ii) can be carried out very well in a short period of time.

Although it may vary depending on the water content, the pH, the C / N ratio, etc. of the livestock waste and / or activated sludge before carrying out the adjusting step (i), the adjusting step (i) is carried out by using a fully fermented fermented compost alone. In general, 100 parts by weight of fermented raw material consisting of livestock waste and / or activated sludge (the total amount when both livestock waste and activated sludge are used) is used for about 100 parts of fully fermented fermented compost. When added in the proportion of 150 to 300 parts by weight, the water content is 55 to 65% by weight, and the pH is
The adjusted product having a C / N ratio of 7.0 or less and a C / N ratio of 20 or less can be smoothly obtained. Further, when the adjustment step (i) is carried out using only the above-mentioned minerals, generally, the fermented raw material consisting of livestock waste and / or activated sludge (when both livestock waste and activated sludge are used, the total amount thereof is used). ) 100
If the mineral is added at a ratio of about 50 to 100 parts by weight, the water content is 55 to 65% by weight, and the pH is 7.0.
The adjusted product having a C / N ratio of 8.5 or less and 20 or less can be smoothly obtained. When the adjusting step (i) is performed using both fermented compost and minerals, the water content, pH and C / N ratio of the adjusted product are adjusted to the above values by appropriately adjusting the use ratio of both. It can be within the scope of the invention.

Although the organic fertilizer can be obtained by directly fermenting the adjusted product obtained in the adjusting step (i) as described above, a high-quality organic fertilizer (fermented compost) is obtained.
It usually takes a long period of 1 to 2 months to complete the fermentation, and during that time, an offensive odor due to the generation of ammonia is generated over a long period of time, and high-quality organic fertilizer can be obtained smoothly in a short period of time. I can't. Therefore, in the present invention, in addition to the conditioned product obtained in the above-mentioned conditioning step (i),
A step of fermenting by adding a fermentation aid comprising wheat bran or a wheat bran mixture mainly consisting of wheat bran (i
By carrying out i), a high-quality organic fertilizer having excellent fertilizing effect can be smoothly produced in a short period of time.

Wheat bran is the outer coat of wheat grains and is mainly produced as a by-product of wheat flour during wheat milling. Wheat bran contains a high concentration of hemicellulose component (usually about 35% by weight), and the hemicellulose component contained in wheat bran is characterized by containing arabinoxylan containing many arabinose side chains. on the other hand,
Examples of those containing the same ingredients as wheat bran include rice bran, gluten feed, etc., but when these are used, their fermentation promoting action is smaller than that of wheat bran,
From this point of view, the effect of promoting fermentation by wheat bran (function as a fermentation aid) was unexpected. The reason why wheat bran has a particularly excellent fermentation promoting action in the fermentation system of the present invention using livestock waste and / or activated sludge as compared with rice bran or gluten feed is not clear, but the reason is as follows. It is estimated that That is, when wheat bran is added to the adjusted product from the adjusting step (i), a microorganism capable of decomposing arabinoxylan can be selectively grown, and the microorganism comprises livestock waste and / or activated sludge. Wheat bran has a C / N ratio of around 15 (by the way, rice bran C / N ratio = about 10 and gluten feed C / N ratio = about 10), and has a water content although it works effectively for fermentation of fermentation raw materials. 15% by weight
It is as low as or less (by the way, the water content of rice bran = about 20% by weight and the water content of gluten feed = about 15% by weight), and as a result, a large number of voids are formed in the fermented system, and thus a microorganism capable of degrading the arabinoxylan that has been proliferated is produced. It is presumed that the organic fertilizer having high fertility can be obtained in a short period of time by working actively and smoothly.

In the present invention, in carrying out the step (ii), the livestock waste used for obtaining the adjusted product in the adjusting step (i) and / or the fermentable raw material composed of activated sludge (livestock waste) The total amount of both activated sludge and activated sludge) is 100 parts by weight (dry matter conversion), and the fermentation auxiliary material consisting of wheat bran or a wheat bran mixture mainly composed of wheat bran is 25 to 50 parts by weight in terms of wheat bran amount. It is necessary to add and ferment at a ratio of (dry matter conversion). If the addition ratio of the fermentation aid comprising wheat bran or wheat bran mixture is less than 25 parts by weight,
Fermentation slows down and the heat of fermentation does not rise, so fermentation does not proceed smoothly and high quality organic fertilizer can not be obtained in a short period of time, while if it is more than 50 parts by weight, the pH will drop during fermentation. As a result, the fermentation will not be carried out smoothly, and it will not be possible to obtain high-quality organic fertilizer in a short period of time. Generally, 100 to parts by weight of fermented raw material composed of livestock waste and / or activated sludge (converted to dry matter), the addition amount of the fermentation aid composed of wheat bran or wheat bran mixture is 30 to 45 parts by weight (converted to dry matter). ) Is preferred.

In the present invention, as described above, the fermentation aid used in step (ii) may be wheat bran alone or a mixture of wheat bran mainly composed of wheat bran. In any case, the origin, preparation method, content, etc. of the wheat bran used therein are not particularly limited, and any wheat bran obtained from wheat may be used.

When a wheat bran mixture is used as a fermentation aid, it contains 50 wt% or more, preferably 70 wt% or more of wheat bran based on the total weight of the wheat bran mixture, and the balance (less than 50 wt%). Any wheat bran mixture composed of components that do not inhibit fermentation may be used.
Among them, in the wheat bran mixture, along with wheat bran, for example, slaked lime, useful microorganisms, humic acids such as humic acid and fulvic acid, vermiculite, perlite, zeolite, one of the components having a fermentation promoting action such as minerals such as diatomaceous earth When containing two or more species,
It is desirable because the fermentation in the step (ii) can be smoothly carried out in a shorter period of time.

Further, in the step (ii), instead of using one or more of the above-mentioned components having a fermentation promoting action in wheat bran for use, (a) the present inventors have previously developed. Fermentation using the fermentation accelerator as described in Japanese Patent Application No. 6-251532 and Japanese Patent Application No. 6-312411, which contains wheat bran, wheat bran, slaked lime, humic acid and specific microbial materials as they are in the step (ii). Even when used as an auxiliary material (a mixture of wheat bran); or (b) a fermentation accelerator containing wheat bran, slaked lime, humic acid and a specific microbial material of the prior inventions is further mixed with wheat bran to obtain The wheat bran mixture to be used may be used as the fermentation aid (wheat bran mixture) used in the step (ii). Then, in any of the cases (a) and (b) described above,
The fermentation aid used in the step (ii) is wheat bran, slaked lime,
Since it contains a fermentation promoter composed of humic acid and specific microbial materials, fermentation of livestock waste and / or activated sludge is further promoted, and high-quality organic fertilizer with excellent fertilizing efficiency can be produced in a shorter period of time. Obtainable.

Regarding the contents of the fermentation accelerator used in (a) and (b) and the preparation method thereof, the above-mentioned Japanese Patent Application No. 6-251532 and Japanese Patent Application No. 6-251532.
No. 312411, which is described in detail,
As the fermentation accelerator, any of the following fermentation accelerators (1) to (3) can be used.

Fermentation accelerator (1) : (A) Organic matter such as wheat bran having an arabinoxylan content of 20% by weight or more, (B) slaked lime, (C) humic acid, and (D ₁ ) microbial material, ): (B):
(C) :( D ₁ ) = 100: 1 to 3: 3 to 10: 5-2
The microbial material (D ₁ ) which is contained in a weight ratio of 0.
Is a mixture of 50 to 80% by weight of organic matter such as wheat bran having an arabinoxylan content of 20% by weight or more and 50 to 20% by weight of at least one adsorbable mineral material and charcoal, or a raw material mainly composed of the mixture. Is used as a fermentation raw material, and after primary fermentation in the presence of one or more of the bacteria consisting of Aspergillus flavus, Aspergillus oryzae and Aspergillus soya, Streptomyces spp., Pseudomonas spp. A fermentation accelerator, which is a microbial material obtained by secondary fermentation in the presence of one or more Bacillus bacteria.

Fermentation accelerator (2) : (A) Organic matter such as wheat bran having an arabinoxylan content of 20% by weight or more, (B) slaked lime, (C) humic acid, and (D ₂ ) microbial material, ): (B):
_{(C) :( D 2) =} 100: 1~3: 3~10: 5~2
The microbial material (D ₂ ) containing 0 weight ratio
However, one or more of Streptomyces actinomycetes, Pseudomonas bacteria and Bacillus bacteria are added to a fermentation raw material composed of organic matter such as wheat bran having an arabinoxylan content of 20% by weight or more to obtain a fermentation raw material. p
It is obtained by adjusting H to 6.0 to 12.0 to start fermentation, and then fermenting while adjusting the pH so that the pH of the fermentation raw material is maintained in the range of 6.0 to 9.5 during fermentation. Fermentation accelerating material, which is a microbial material produced

Fermentation accelerator (3) : (A) Organic substances such as wheat bran having an arabinoxylan content of 20% by weight or more, (B) slaked lime, (C) humic acid, and (D ₃ ) microbial material, ): (B):
_{(C) :( D 3) =} 100: 1~3: 3~10: 5~2
0 weight ratio and the microbial material (D ₃ ) is
A fermentation raw material comprising a mixture of an organic substance such as wheat bran having an arabinoxylan content of 20% by weight or more and at least one selected from an adsorptive mineral material and charcoal equal to or less than the organic substance, Streptomyces spp. The pH of the fermentation raw material was adjusted to 6.0 by adding one or more of actinomycetes, Pseudomonas bacteria and Bacillus bacteria.
A microbial material obtained by adjusting the pH to 12.0 to start fermentation, and fermenting while adjusting the pH so that the pH of the fermentation raw material is maintained in the range of 6.0 to 9.5 during fermentation. A fermentation promoter.

Here, the humic acid used as the component (C) in the above fermentation accelerators (1) to (3) is an alkali alkali contained in young coals such as peat and lignite having a low degree of coalification. Any soluble amorphous polymeric organic acid may be used,
It may be artificial or natural. Further, nitrohumic acid and salts thereof obtained by pulverizing young charcoal, which is a raw material of artificial humic acid, and oxidatively decomposing it with nitric acid can also be used. It is also possible to use substances containing humic acid such as young coals such as peat and lignite in place of humic acid, but to separate them from young coals such as peat and lignite without using them as they are. It is preferable to use humic acid, nitrohumic acid, or salts thereof, because microorganisms useful for composting can be grown with a small amount of use.

As the microbial material (D ₁ ) used in the fermentation promoting material (1), Japanese Patent Application _No. 6-7 filed by the applicant of the present invention is used.
The organic fertilizer produced by the method described in 2900 can be used as it is as a microbial material (D ₁ ), and the details thereof are described in the Japanese Patent Application No. 6-72900, but a brief description will be given. Generally, it can be manufactured as follows.

<< Method for Producing Microbial Material (D ₁ ) >> 5 or more kinds of organic substances such as wheat bran, rice bran, corn hulls and the like having an arabinoxylan content of 20% or more.
0-80%, preferably 60-70% with zeolite,
Adsorbent mineral materials such as vermiculite, charcoal, kun charcoal,
Mixture of 50 to 20%, preferably 40 to 30% of one or more kinds of charcoal such as chaff charcoal, activated carbon, bone charcoal, and optionally a nitrogen source such as ammonium sulfate or lime superphosphate, a phosphorus source , A potassium source, an inorganic fertilizer component serving as an iron source, etc. are mixed in an amount of about 5% or less to form a fermentation raw material, and preferably the fermentation raw material is sterilized to kill various bacteria, and then Aspergillus Flavas (Aspergillus)
flavus), Aspergillus or
yzae) and Aspergillus soya
First, primary fermentation is performed in the presence of one or more of the bacteria consisting of jae). Then adjust the pH to 6.0-7.5.
The primary fermented product prepared as described above was used for Streptomyces spp. Capable of assimilating arabinoxylan, Pseudomonas spp. Bacteria and Bacillus spp.
The secondary fermentation is carried out in the presence of one or more bacteria belonging to the genus acillus), preferably at a pH of 6.0 to 9.0, more preferably at a pH of 7.0 to 7.5. As the actinomycetes of the genus Streptomyces at that time, particularly Streptomyces heimi, Streptomyces flaveolus (Streptomyces flaveol)
us), Streptomyces misionensis (Streptomyc)
fungi such as es misionensis), Streptomyces humanus (Streptomyces fumanus), Streptomyces albulus, and Streptomyces griseofuscus have a high assimilation effect and are useful. Pseudomonas fluorescen is an example of a useful bacterium of the genus Pseudomonas.
s), Pseudomonas putida
, And as a useful Bacillus bacterium, Bacillus circula
ns), Bacillus subtilis and the like. Streptomyces actinomycetes used for secondary fermentation, Pseudomonas bacteria and Bacillus bacteria may be any known ones, commercially available or available for sale can be used, For details, the above-mentioned Japanese Patent Application No. 6-72
No. 900 specification. When the secondary fermentation is performed as described above, the above-mentioned fungi added for secondary fermentation in the fermentation product are growing at the end of the secondary fermentation,
A finely-divided microbial material (D ₁ ) having no bad odor can be obtained.

Further, microbial material (D ₂ ) and microbial material
(D ₃ ) can be generally produced as follows. << Method for Producing Microbial Material (D ₂ ) >> As a fermentation raw material, one or two of Streptomyces spp., Pseudomonas spp. And Bacillus spp. Is added to a fermentation raw material composed of an organic substance having an arabinoxylan content of 20% or more. Seed or more is added to adjust the pH of the fermentation raw material to 6.0 to 12.0 to start fermentation, and the pH of the fermentation raw material is adjusted to 6.
It is manufactured by fermenting while adjusting the pH so that it is maintained in the range of 0 to 9.5.

<< Method for Producing Microbial Material (D ₃ ) >> As a fermentation raw material, at least one selected from organic substances having an arabinoxylan content of 20% or more, and adsorptive minerals and charcoals of equal weight or less to the organic substances. To the fermentation raw material consisting of a mixture with and, one or more of Streptomyces actinomycetes, Pseudomonas bacteria and Bacillus bacteria are added to adjust the pH of the fermentation raw material to 6.0 to 12.0. The fermentation is started and during the fermentation the pH of the fermented material is 6.
It is manufactured by fermenting while adjusting the pH so that it is maintained in the range of 0 to 9.5.

Then, in the step (ii) in the present invention,
Fermentation aids comprising wheat bran or wheat bran mixture as described above are added to the adjusted product from the adjusting step (i) in the proportions given above to perform fermentation to produce an organic fertilizer, but the step (ii) It is preferable to stir (return) the mixture from time to time under the aerobic condition as much as possible, because the fermentation time can be shortened and a highly fertile organic fertilizer can be obtained. It is usually sufficient to stir (return) about 1 to 5 times a week.

Then, the fermented material consisting of livestock waste and / or activated sludge and the fermentation auxiliary material consisting of wheat bran or a mixture of wheat bran used in the step (ii) can be up to about 1/2 of the total weight or the livestock waste. When the weight or volume of the fermentation product is reduced to about 1/2 of the total volume of the fermentation raw material consisting of the product and / or the activated sludge and the wheat bran or the wheat bran mixture used in the step (ii), In many cases, fermenting is performed sufficiently to form a fully-ripened compost (organic fertilizer), so it is preferable to use this as an organic fertilizer.

In the case of the above-mentioned method of the present invention, since the time required for fermentation is short, the period of generation of ammonia causing odor is short, and the obtained organic fertilizer is fermented sufficiently and in good condition. There is no odor or offensive odor due to the presence. In addition, since it has been decomposed into a fine-grained state, it has excellent handleability, and is suitable for vegetables, cereals such as rice and wheat, flowers, fruit trees, turfgrass, and other plants such as trees. It can be effectively used as fertilizer.
The method of applying the organic fertilizer of the present invention to the plant in that case,
It may be carried out in the same manner as in the case of ordinary organic fertilizer, and is not particularly limited.

[0039]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. In the following examples, the livestock waste and activated sludge before the adjustment step (i) and the water content of the adjusted product, the fermented raw material consisting of the livestock waste and the activated sludge before the adjustment step (i), and The C / N ratio of the adjusted product, the evaluation of the growth degree of Komatsuna, and the measurement of the number of actinomycetes in the organic fertilizer obtained by fermentation were performed as follows.

[Measurement of Water Content of Fermented Raw Material and Preparation Product Thereof] 20 g of a sample was placed in a stainless steel container (10
cm × 15 cm × 2 cm) and dry-heat dried at 130 ° C. for 2 hours, and then determine the weight loss rate, which is the water content (%)
And

[C / of fermented material and its adjusted product]
Measurement of N Ratio] 0.5 g of a sample is put in a sample tube, and C
/ N coder (Sumitomo Chemical Sumigraph Co .; NC-90
The amount of total carbon (C) and the amount of total nitrogen (N) were obtained from A), and the ratio (C / N) was obtained.

[Evaluation of growth rate of Komatsuna] Using the organic fertilizers obtained in Examples or Comparative Examples, a growth test was conducted on Komatsuna as follows to evaluate the growth rate. 30 ml of water is added to 1 g of organic fertilizer, and after stirring, the mixture is left at 60 ° C. for 3 hours. Then, 2 ml of the filtrate obtained by filtering using filter paper (Toyo Roshi No. 5)
Is placed in a petri dish lined with two pieces of filter paper (Toyo Filter Paper No. 2), about 30 seeds of Komatsuna are sowed, and cultured in a thermostatic chamber at 25 ° C. Cultivation was carried out for 4 days, and the growth rate of konatsuna was evaluated by 10 panelists according to the evaluation criteria shown in Table 1 below, and the average value was taken.

[0043]

[Table 1]

[Method for measuring the number of actinomycetes] Organic fertilizers obtained in Examples or Comparative Examples [Fermented raw material consisting of livestock waste or activated sludge, and wheat bran or wheat bran mixture used in step (ii)] A part of the organic fertilizer obtained when the total weight of the fermentation aid became about ½] was collected, and the actinomycete count was measured by the diluted agar plate culture method as follows. That is, starch 10 g, casein 0.3 g, KNO ₃ 2 g, NaCl 2 g, K ₂ per 1 liter of water.
_{HPO 4 2g, MgSO 4 · 7H} 2 O 0.05g, CaCO 3 0.02
g, FeSO ₄ .7H ₂ O 0.01 g, agar 18 g, and cycloheximide (antifungal agent) 0.06 g were used to prepare an agar plate medium (pH 7.2) at 30 ° C. for 6 days. The number of colonies when cultured was measured.

Example 1 (1) Cow dung (water content 80% by weight, pH 8.1, C /
N ratio 16.5) 5 kg to fully ripe cow dung / scraps compost (water content 45% by weight, pH 7.8, C / N ratio 1)
8.5; compost obtained by adding 25 kg of sawdust to 10 kg of cow dung and fermenting for 4 months)
Water content 60% by weight, pH 8.0 and C / N ratio 17.
A conditioned product of 6 was obtained [conditioning step (i)]. (2) 11.5 kg of the adjusted product obtained in (1) above
Against wheat bran (water content 14% by weight) 0.4k
After adding g (ratio of wheat bran dry matter 0.34 kg to cow dung dry matter 1 kg) and mixing and stirring, this was put in a styrofoam container of length × width × depth = 26 cm × 34 cm × 30 cm, and the temperature was increased. The sample was allowed to stand in a room set at 25 ° C. and stirred every two days, and the weight loss was measured with time. The total weight of cow dung, which is a raw material to be fermented, and wheat bran added as a fermentation aid was 5.4 kg, and an organic fertilizer was produced with the time when the weight decreased to 2.7 kg, which is 1/2 of the total weight, as the fermentation end point. [Step (ii)]. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 2.

Example 2 (1) Activated sludge (water content 85% by weight, pH 7.9,
5 kg of C / N ratio of 7.9), ripe cow dung / scraps compost (moisture content 45% by weight, pH 7.8, C / N ratio of 18.5;
7 kg of fertilizer obtained by fermenting for a month) was added and mixed to obtain a water content of 62% by weight, a pH of 7.9 and a C / N ratio of 14.1.
[Step (i)] was obtained. (2) 0.3 kg of wheat bran (water content 14% by weight) based on 12 kg of the adjusted product obtained in (1) above,
Humic acid ("Nitrohumic acid" manufactured by Ternite) 10 g
And a wheat bran mixture (fermentation aid; wheat bran content 93.8% by weight) obtained by mixing 10 g of slaked lime (13.8 kg of activated sludge dry matter and 0.3 kg of wheat bran dry matter).
(5 kg ratio), after mixing and stirring, this was put in a styrofoam container of length × width × depth = 26 cm × 34 cm × 30 cm, and fermented in the same manner as in Example 1 below, and activated sludge as a raw material to be fermented. And the total weight of the fermentation aid is about 5.
It was 3 kg, and the organic fertilizer was manufactured with the fermentation end point at the time when the weight was reduced to 1/2, which is 2.65 kg. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 2.

Example 3 (1) Pig manure (water content 75% by weight, pH 7.6, C /
N ratio 13.2) 5 kg, vermiculite (water content 10% by weight, pH 7.2) 2 kg was added and mixed to give a water content 56% by weight, pH 7.5 and C / N ratio 1
A conditioned product of 3.2 was obtained [step (i)]. (2) To 5 kg of the adjusted product obtained in (1) above, 0.45 kg of wheat bran (water content 14% by weight) was added as a fermentation aid (1 kg of pig feces dry matter to wheat bran dry matter). 0.31 kg ratio), after mixing and stirring, this is put in a styrofoam container of length × width × depth = 26 cm × 34 cm × 30 cm, and fermentation is performed in the same manner as in Example 1 below to obtain a material to be fermented. The total weight of pig manure and fermentation aid is 5.45 kg, which is 1/2, which is 2.73 kg.
The organic fertilizer was manufactured with the fermentation end point at the time when the weight decreased to 1 hour. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 2.

Comparative Example 1 (1) Cow dung (water content 80% by weight, pH 8.1, C /
N ratio 16.5) 5 kg to fully ripe cow dung / scraps compost (water content 45% by weight, pH 7.8, C / N ratio 1)
8.5; compost obtained by adding 25 kg of sawdust to 10 kg of cow dung and fermenting for 4 months)
Water content 60% by weight, pH 8.0 and C / N ratio 17.
A conditioned product of 6 was obtained [conditioning step (i)]. (2) 11.5 kg of the adjusted product obtained in (1) above
To this, 0.4 kg of rice bran (water content 20% by weight) was added (a ratio of 0.32 g of rice bran dry matter to 1 kg of cow dung dry matter), and after mixing and stirring, this was length × width × depth = 26c.
The mixture was placed in a styrene foam container of m × 34 cm × 30 cm and fermented in the same manner as in Example 1 below, and the total weight of the raw materials to be fermented, cow dung and rice bran (fermentation aid) was 5.45.
The organic fertilizer was produced with the fermentation end point at the time point when the weight was reduced to 2.73 kg, which is 1/2 of that.
At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 2.

Comparative Example 2 (1) Activated sludge (water content 85% by weight, pH 7.9,
C / N ratio 7.9) 5 kg, rice straw (water content 35
% By weight, pH 6.8, and C / N ratio 67.0) 4 kg were added and mixed to obtain a water content of 63% by weight, pH 7.4 and C /
A conditioned product having an N ratio of 34.2 was obtained [step (i)]. (2) A wheat bran mixture (fermentation aid) obtained by mixing 0.3 kg of wheat bran (water content 14% by weight), 10 g of humic acid and 10 g of slaked lime with 9 kg of the adjusted product obtained in (1) above. Wheat bran content 93.8% by weight) was added (0.35 kg of wheat bran dry matter to 1 kg of activated sludge dry matter), and after mixing and stirring, this was length x width x depth = 26 cm x 34 cm x The mixture was placed in a 30 cm styrene foam container and fermented in the same manner as in Example 1 below, and the total weight of the activated sludge as a raw material to be fermented and the fermentation auxiliary material was about 5.3 kg, which was 1/25 of 2.65 kg.
The organic fertilizer was manufactured with the fermentation end point at the time when the weight decreased to 1 hour. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 2.

Comparative Example 3 5 kg of pig manure (water content 75% by weight, pH 7.6, C / N ratio 13.2)
Wheat bran (water content 15% by weight, pH 6.5, C / N
(Ratio 15.0) 2.5 kg was directly added as a fermentation aid (ratio of 1 kg of pig dung dry matter to 1.7 kg of wheat bran dry matter), and after mixing and stirring, this was length × width × depth = 26c.
It was put in a styrene foam container of m × 34 cm × 30 cm and fermented in the same manner as in Example 1 below, and the total weight of the pig manure and the fermentation auxiliary material that were the materials to be fermented was 7.5 kg, which was 1/2 of that. The organic fertilizer was manufactured with the fermentation end point when the weight decreased to 3.75 kg. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 2.

[0051]

[Table 2]

From the results shown in Table 2 above, the water content of the fermented material consisting of livestock waste (cattle dung or pig dung) or activated sludge is 55 to 65% by weight, pH is 7.0 to 8.5 and C / After adjusting the N ratio to 20 or less, a fermentation auxiliary material consisting of wheat bran or a wheat bran mixture mainly consisting of wheat bran is added to 25 to 50 parts by weight of the fermented raw material consisting of livestock waste or activated sludge (dry matter conversion). In the case of Examples 1 to 3 in which 50 parts by weight (dry matter equivalent) is added and fermented, it takes up to 1/2 of the initial total weight of the material to be fermented and the fermentation aid. It can be seen that the fermentation time was as short as 18 days or less, and the organic fertilizer obtained thereby had a large number of actinomycetes, which are useful microorganisms, and the komatsuna growth rate was good and the fertilizing effect was also excellent.

On the other hand, the results of Comparative Example 1 show that the water content of the fermented material consisting of livestock waste (cow dung) is 55.
~ 65 wt%, pH 7.0-8.5 and C / N ratio 2
Although it is adjusted to 0 or less, when rice bran is used as a fermentation aid without using wheat bran, it is required to reach 1/2 of the initial total weight of the material to be fermented and the fermentation aid. The fermentation time was 28 days, which was significantly longer than that of Example 1, and the organic fertilizer obtained thereby had a small number of actinomycetes, which are useful microorganisms, and the growth rate of komatsuna was also poor, resulting in poor fertilization. You can see that

Further, from the results of Comparative Example 2, although the water content and pH of the adjusted product of the raw material to be fermented consisting of activated sludge were in the same range as in the present invention, the C / N ratio was 3
When the adjusted product is 4.2, which is extremely high, the fermentation time required to reach 1/2 of the initial total weight of the raw material to be fermented and the fermentation aid even when the wheat bran mixture is used as the fermentation aid. Is 45 days, which is significantly longer than that in Example 2, and the organic fertilizer obtained therefrom has a small number of actinomycetes, which are useful microorganisms, and the growth rate of komatsuna is also poor, resulting in poor fertilization. I understand.

Furthermore, from the results of Comparative Example 3, wheat bran was used without adjusting the water content, pH and C / N ratio (particularly water content) of the fermented raw material consisting of pig manure within the range of the present invention. When fermentation was carried out by directly adding the fermentation aid, the fermentation time required to reach 1/2 of the initial total weight of the raw material to be fermented and the fermentation aid was 40 days, and compared to Example 3. It can be seen that the organic fertilizer, which is significantly longer, has a small number of actinomycetes, which are useful microorganisms, and the growth rate of komatsuna is also poor, resulting in poor fertilization.

Reference Example 1 [Production of Microbial Material (D ₁ )] A mixture of 50 kg of wheat bran with an arabinoxylan content of 35%, 5 kg of zeolite and 25 kg of vermiculite (total 80 kg: wheat bran content of 6 in the mixture).
2.5%) was uniformly mixed using a large mixer, 45 kg of water was added and further mixed, and then sterilized by heating steam. The water content of the mixture after sterilization was about 40%. Next, dry cells 70 of Aspergillus oryzae (IFO 30105)
After g was added and mixed uniformly, the ambient temperature was controlled at 27 ° C. and primary fermentation was carried out for 48 hours under aerobic conditions. During the primary fermentation, cutting was performed twice. Then
Streptomyces flaveorus
olus) (IFO 12768) and Bacillus circulans (IFO 13640) 70 g each
Microbial material (D ₁ ) by adding each of them and mixing uniformly, controlling the ambient temperature to 25 ° C. under aerobic conditions, cutting back (stirring) twice on the way, and performing secondary fermentation for 72 hours.
Got

Reference Example 2 [Production of Fermentation Accelerator] With respect to 100 parts by weight of wheat bran, 2 parts by weight of slaked lime, 5 parts by weight of the same humic acid used in Example 2 and the above reference example 1 were used. The fermentation promoting material was manufactured by mixing 5 parts by weight of the obtained microbial material (D ₁ ).

Example 4 (1) Cow dung (water content 80% by weight, pH 8.1, C /
N ratio 16.5) 5 kg, vermiculite (water content 10% by weight, pH 7.2) 2 kg was added and mixed to obtain a water content 60% by weight, pH 7.6 and C / N ratio 1
A conditioned product of 6.5 was obtained [step (i)]. (2) Based on 7 kg of the adjusted product obtained in (1) above, 0.2 kg of wheat bran (water content 15% by weight) and 0.3 kg of the fermentation accelerator obtained in Reference Example 2 above. After adding the material (ratio of the total amount of wheat bran dry matter to 0.31 kg to 1 kg of cow dung dry matter) and mixing and stirring,
This was put in a styrofoam container of length × width × depth = 26 cm × 34 cm × 30 cm, fermentation was performed in the same manner as in Example 1 below, and the total weight of cow dung and fermentation auxiliary material as the materials to be fermented was 5.5 kg. And that half, 2.75 kg
The organic fertilizer was manufactured with the fermentation end point at the time when the weight decreased to 1 hour. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 3.

Example 5 (1) Cow dung (water content 80% by weight, pH 8.1, C /
N ratio 16.5) 5 kg, vermiculite (water content 10% by weight, pH 7.2) 2 kg was added and mixed to obtain a water content 60% by weight, pH 7.6 and C / N ratio 1
A conditioned product of 6.5 was obtained [step (i)]. (2) To 7 kg of the adjusted product obtained in (1) above, 0.5 kg of the fermentation accelerator obtained in Reference Example 2 above was added as a fermentation aid (1 kg of cow dung dry matter to wheat bran). (Ratio of dry matter 0.27 kg), and after mixing and stirring, put this in a polystyrene foam container of length x width x depth = 26 cm x 34 cm x 30 cm, and perform fermentation in the same manner as in Example 1 below to obtain a material to be fermented. The total weight of a certain cow dung and fermentation aid was 5.5 kg, and the organic fertilizer was manufactured with the fermentation end point when the weight decreased to 1/2, which was 2.75 kg. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 3.

Comparative Example 4 (1) Cow dung (water content 80% by weight, pH 8.1, C /
N ratio 16.5) 5 kg, vermiculite (water content 10% by weight, pH 7.2) 2 kg was added and mixed to obtain a water content 60% by weight, pH 7.6 and C / N ratio 1
A conditioned product of 6.5 was obtained [step (i)]. (2) To 7 kg of the adjusted product obtained in (1) above, 0.2 kg of wheat bran was added as a fermentation aid (1 kg of cow dung dry matter to 0.17 kg of wheat bran dry matter).
Ratio), after mixing and stirring, this is length × width × depth = 26
The mixture was placed in a polystyrene foam container of cm × 34 cm × 30 cm, fermented in the same manner as in Example 1 below, and the total weight of the cow dung and the fermentation auxiliary material that were the materials to be fermented was 5.2 kg, which was 1/2 of 2 The organic fertilizer was manufactured with the fermentation end point when the weight decreased to 0.6 kg. At that time,
While counting the number of days until reaching the fermentation end point, using the organic fertilizer obtained there, by the method described above, the evaluation of the growth rate of Komatsuna and the measurement of the number of actinomycetes,
The results were as shown in Table 3 below.

Reference Example 3 [Japanese Patent Application No. 6-312411]
No. method] (1) 1 kg of wheat bran, 20 g of slaked lime, Example 2
50 g of the same humic acid used in Example 1 and Reference Example 1 above
A fermentation accelerating material was prepared by mixing 100 g of the microbial material (D ₁ ) obtained in the above. (2) Livestock waste (mixture of cow and pig waste) 10k
The total amount of the fermentation promoting material prepared in (1) above was mixed with g, and length × width × depth = 26 cm × 34 cm × 35 c
Put it in a polystyrene foam container of m (thickness about 35 cm),
Leave in a room with a temperature of about 15 to 20 ° C, stir at a rate of once every two days, and measure the weight during fermentation over time to excrete cattle and pigs that are raw materials to be fermented and promote fermentation. The total weight of the timber was about 11.2 kg, and the organic fertilizer was manufactured with the fermentation end point at the time when the weight decreased to 5.6 kg, which is 1/2 of the total weight. At that time, the number of days until reaching the fermentation end point was counted, and the growth rate of Komatsuna and the measurement of actinomycetes were performed by the above-mentioned method using the organic fertilizer obtained there, and the following table was obtained. The result was as shown in 3.

[0062]

[Table 3]

From the results shown in Table 3 above, the water content of the fermented material consisting of livestock waste (cow dung) was adjusted to 55 to 65% by weight, the pH was adjusted to 7.0 to 8.5, and the C / N ratio was 20 or less. After that, a wheat bran mixture of wheat bran and a fermentation accelerator is added as a fermentation aid, and a range of 25 to 50 parts by weight (dry matter equivalent) is added to 100 parts by weight of fermented raw material made of livestock waste (dry matter equivalent). Of Example 4, which is added and fermented at a rate of 5 to 65% by weight, and a pH of 7.0 of the fermented material composed of livestock waste (cow dung).
8.5 and a C / N ratio of 20 or less, and then a fermentation promoter mainly composed of wheat bran (wheat bran mixture)
Is added directly as a fermentation aid and 25 to 100 parts by weight of fermented raw material (dry matter equivalent) consisting of livestock waste
In the case of Example 5 in which the mixture is added and fermented at a ratio in the range of 50 parts by weight (dry matter equivalent), the fermentation required to reach 1/2 of the initial total weight of the material to be fermented and the fermentation aid. The time was 15 days or less, which was shorter than that in Examples 1 to 3 above, and the organic fertilizers obtained thereby had a large number of actinomycetes, which are useful microorganisms. It can be seen that the results are good and the fertilizer is also excellent.

From the results shown in Table 3 above, the fermented raw material consisting of livestock waste (cow dung) has a water content of 55 to 65% by weight, a pH of 7.0 to 8.5 and a C / N ratio of 20 or less. In the case of Example 4 and Example 5 in which the mixture of wheat bran and the fermentation accelerator is added to the wheat bran or the fermentation accelerator is added to perform fermentation, the water content of the raw material to be fermented consisting of livestock waste is adjusted. Fermentation required to reach 1/2 of the initial total weight of the material to be fermented and the fermentation aid, as compared with Reference Example 3 in which the fermentation accelerator is directly added for fermentation without adjusting the content and the like. It can be seen that the time is becoming shorter and the number of actinomycetes, which is a useful microorganism, is increasing.

On the other hand, according to the result of Comparative Example 4, the water content of the fermented material composed of livestock waste (cow dung) was 55.
~ 65 wt%, pH 7.0-8.5 and C / N ratio 2
Although adjusted to 0 or less, the proportion of wheat bran used as a fermentation aid is less than 25 parts by weight (dry matter equivalent) with respect to 100 parts by weight of fermented material (dry matter equivalent), which is within the range of the present invention. When it comes off, the fermentation time required to reach 1/2 of the initial total weight of the raw material to be fermented and the fermentation auxiliary is 45 days, which is significantly longer than in Examples 4 and 5. In addition, it can be seen that the organic fertilizer thus obtained has a small number of actinomycetes, which are useful microorganisms, and the growth rate of komatsuna is also poor, resulting in poor fertilization.

[0066]

EFFECTS OF THE INVENTION According to the present invention, at least one of livestock waste and activated sludge, which have been difficult to handle in the past, is used as a material to be fermented, and while maintaining a good fermentation state, it is highly effective in fertilization. It is possible to easily and economically produce a high quality organic fertilizer in a short fermentation period without using special equipment. And, according to the present invention, the generation of ammonia and other odors that are the cause of odor during the production of organic fertilizer is suppressed, and even if the odor occurs because the fermentation period is short,
The period is short. Further, in the present invention, when a wheat bran mixture containing one or more of components having a fermentation promoting action such as minerals, slaked lime, humic acid, and microbial materials, which consist mainly of wheat bran as a fermentation aid is used in the present invention In addition, the fermentation period for producing organic fertilizer can be further shortened.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Suzu Hanami 13 Okubo, Tsukuba-shi, Ibaraki Nisshin Seisakusho Co., Ltd. (72) Ken Kenmae, 13 Okubo, Tsukuba-shi, Ibaraki Nisshin Seifun Co., Ltd. In-house (72) Kenzo Okada 13 Okubo, Tsukuba City, Ibaraki Nisshin Seifun Co., Ltd. (56) Reference JP-A-7-277865 (JP, A) JP-A-56-120595 (JP, A) JP-A-8-198694 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C05B 1/00-C05G 5/00

Claims (4)

(57) [Claims] 1. A method for producing an organic fertilizer by using livestock waste and / or activated sludge as a raw material to be fermented, comprising: (i) the water content of a raw material to be fermented comprising livestock waste and / or activated sludge. 55 to 65% by weight, the step of adjusting the pH to 7.0 to 8.5 and the C / N ratio to 20 or less; and (ii) the adjusted product obtained in the above step (i) is wheat bran or wheat. 25 to 50 parts by weight of wheat bran (based on dry matter) based on 100 parts by weight of fermented raw material (on dry matter basis) consisting of livestock waste and / or activated sludge. The method for producing an organic fertilizer, which comprises: 2. The adjustment of the water content, pH and C / N ratio of the fermented raw material in the step (i) is carried out by adjusting the C / N ratio to 2
The production method according to claim 1, which is carried out by using at least one of a fermented product and a mineral that are 0 or less. 3. The wheat bran mixture used in step (ii) is a wheat bran mixture which is mainly composed of wheat bran and contains at least one of slaked lime, useful microorganisms, humic acid and minerals. 2. The manufacturing method of 2. 4. An organic fertilizer obtained by the method according to any one of claims 1 to 3.