JPS6360187A - Manufacture of chicken fertilizer - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a new method for producing chicken manure fertilizer.

"Prior art and its problems" Currently, there are methods known to process chicken manure and use it as fertilizer, such as forced drying of chicken manure and fermentation of chicken manure, but both of them generate a strong odor, so it is difficult to prevent odor pollution. The problem has been pointed out for a long time, and not only that, but when crops are fertilized with fertilizers manufactured by these conventional methods, the results are good in the first year;
It is known that harmful effects occur after 2 to 3 years. That is,
According to the fertilizer obtained by the above conventional method, feathers and grain stages remain in the fertilizer, which rot in the soil after many years and produce organic acids, which cause root rot. It is. These feathers, grains, etc. are contained in chicken manure, but these do not undergo elemental decomposition, and even if they are forced to dry, they only become carbonized, so they are not contained in the treated fertilizer. It is coming.

In order to solve the above problem, the inventor of the tree conducted intensive research and found that by adding water, which is the complete opposite of the conventional method of removing water, feathers, grain steps, etc. that cause root rot can be removed. We came up with the idea of what could be done and arrived at the present invention.

``Means for Solving the Problems'' That is, the present invention mixes and stirs chicken manure and water, then separates insoluble matter such as feathers and grain husks, and then adds a precipitated flocculant to the filtrate. It is characterized by insolubilizing the dissolved matter and using the resulting precipitate as fertilizer.

Chicken manure generally consists of about 75% moisture, 15% feathers, grain husks, etc., and 10% oita.According to the present invention, this oita becomes high-quality chicken manure fertilizer, and the feathers, grain husks, etc. are used as fuel. After that, it can be used as potash fertilizer.

In the first step of the wood invention, preferably 4 to 40% of the excreted chicken manure is
After adding 5 times as much cleaning water or diluting water and stirring thoroughly, solid-liquid separation is carried out using, for example, a screen.

Since the filtrate after solid-liquid separation still contains insoluble matter, ordinary flocculants such as inorganic and polymeric ones are added to flocculate organic matter, especially suspended solids, and the resulting sludge is separated by sedimentation. Although this is not always necessary, by pre-treating with a common flocculant in this way, it is possible to reduce the amount of precipitated flocculant added in the next step.

The second step is to add a precipitated flocculant to the filtrate after solid-liquid separation,
The precipitating flocculant used for this purpose, which is to insolubilize and separate dissolved substances, is prepared by dissolving vermiculite, which is weathered mica mineral (preferably black mica), in an aqueous acid solution such as hydrochloric acid or sulfuric acid. Using an acidic additive (dissolved in an aqueous sulfuric acid solution is commercially available under the trade name "Sapro" from Shimaniji Kaken Co., Ltd.) containing various kinds of metal salts and non-metal salts as main components. Good.

When this precipitating flocculant is added to the filtrate, organic substances dissolved in the water are immediately precipitated and collected, generating carbon dioxide gas. Then, after leaving the mixture for a while, lime water is gradually added to the mixture to bring the pH to about 7 to 8, which rapidly forms flocs and separates the sludge by precipitation.

The third step is to turn the settled sludge into fertilizer.This can be done by separating the settled sludge and supernatant water, for example, and concentrating and drying the separated sludge. The slag separated during the process (feathers, grains, etc. 'F'4 fuel, burning, heat, etc.).

This is preferable because burnt ash can be used as fertilizer and for cost reasons.

The concentrated and dried fertilizer can be used as it is as a fertilizer, but since the incinerated ash from the insoluble matter is a good potash fertilizer, it may be used as a mixed fertilizer with it.

In addition, by adsorbing the settled sludge to a soil conditioner, it can be made into a highly fertilizing soil conditioner. For example, the settled sludge can be adsorbed to vermiculite and then air-dried or dried in an appropriate dryer. If dried inside, a fertilizing soil conditioner can be obtained. At this time, it is more preferable to further mix incineration ash, since this incineration ash becomes a drying aid and the obtained soil conditioner contains potassium, which is highly fertilizing.

"Example" Next, embodiments of the tree invention will be described based on the drawings.

1 is an adjustment solubilization tank. Chicken manure and water in an amount four times the amount of chicken manure are added to this solubilization tank 1, and after stirring thoroughly with a stirrer 2,
Stop stirring and let stand.

Then, the filtrate is sieved through a screen 3 equipped with a self-cleaning double vibrating sieve, and the filtrate is sent to a coagulation tank reef.
After drying, screen sludge from grains, etc. can be used as a fuel to thicken sludge.On the other hand, filtrate is treated by adding a polymer flocculant to flocculate suspended solids, separating precipitated sludge, and then using it as a fuel. The clear liquid is sent to the Sapro reaction tank 5.

When Sapro is added, for example, 0.5% of the treated liquid, to the supernatant liquid sent to the reaction tank 5 and stirred gently, the organic substances dissolved in the water immediately begin to precipitate and coagulate, causing carbon dioxide to be released. discharge. The amount of this sapro added is, for example, 0.1 to
Although it can be varied over a wide range of 1.0z, if the amount added is too small, the dissolved material will not be sufficiently insolubilized, and if the amount added is too large, it will become uneconomical.

After leaving it for about 10 minutes, send it to the neutralizing agent mixing tank 6, and gradually add lime water while stirring to bring the pH to about 7 to 8. It will quickly become flocs and begin to settle, so SakiPro coagulation and sedimentation will occur immediately. Send to tank 7.

The treated water sent to the coagulation and sedimentation tank 7 is drained in a rectifying trough and allowed to settle gently, whereby the coagulated sludge is separated by settling. The supernatant water crosses the overflow weir and is sent from the treated water pump tank 8 to the Sunsoil water filter bed 3, and the sludge is pulled out by an air lift device and sent to the sludge thickening tank 10. The sludge sent to the sludge thickening tank 10 is dried after being drained, and can be used as a highly effective fertilizer rich in minerals.

On the other hand, the supernatant water sent to the Sunsoil sprinkling filter bed 3 is treated by filtration and biofilm catalytic oxidation, and the treated water is sent to the adjustment solubilization tank 1 and used for diluting chicken manure. In the above embodiment, the sunsoil water filter bed 9 used was one in which a replaceable vermiculite layer in the form of a cartridge, a fillite layer, and a zeolite or anthoracite layer were sequentially laminated from above. .

In order to make a highly effective soil conditioner using the method of Wood's invention, Sabro concentrated sludge is adsorbed on vermiculite 11, and then screen-separated feathers 5, incinerated ash of grain husks, etc.
2 is mixed in, and while the mixture is stirred and homogenized by the screw conveyor kneader 13, it is rapidly dried by the combustion heat energy of the incinerator. By mixing vermiculite, which has excellent properties as a soil conditioner, you can obtain a soil conditioner with high fertilizing properties.Vermiculite's high water retention capacity increases drying efficiency, so you can leave it as is. The advantage is that it can also be dried by air drying.

``Effects of the Invention'' As described above, according to the method of the tree invention, since the fertilizer is made by precipitating it from an aqueous solution, it does not emit a bad odor during the treatment, and it can be used in the soil from feathers, grain husks, etc. Since it does not contain substances that generate organic acids, it solves all the shortcomings of conventional chicken manure processing methods, such as there is no risk of root rot, and it will greatly benefit the industry.
Furthermore, according to the present invention, the used dilution water can be recovered and reused as dilution water for chicken manure, making it possible to create a completely closed system, which eliminates not only bad odor pollution but also the problem of sewage pollution. can be avoided.

[Brief explanation of drawings]

Claims (2)

[Claims] (1) After mixing and stirring chicken manure and water, the residue is separated, and then a precipitating flocculant is added to the filtrate to insolubilize the dissolved content in the filtrate, and the resulting precipitate is used as fertilizer. A method for producing chicken manure fertilizer. (2) The precipitation flocculant is an acidic additive containing various metal salts and non-metal salts obtained by dissolving vermiculite, which is weathered mica-based mineral, in an inorganic acid aqueous solution as a main component. The method for producing chicken manure fertilizer according to item 1.