JPH02293387A - Treatment of processing residue of bonito - Google Patents

Abstract

PURPOSE:To eliminate offensive odor of processing residue of bonito, to decompose unnecessary components and to effectively utilize the processing residue of bonito as fertilizer or fat by fermenting the residue in a fermentation tank while stirring with air. CONSTITUTION:Fat-containing processing residue of bonito (slurry produced by dehydrating processing waste liquid of fish body or residue containing guts and blood, etc.) is fermented in a fermentation tank at about 40 deg.C under stirring with air and water is slowly mixed to the residue according to the progress of fermentation. The turbidity is decreased and the transparency is gradually increased by the gradual mixing of water according to the progress of fermentation to obtain a colorless transparent jelly. The obtained colorless transparent regenerate can be utilized as a liquid fertilizer by diluting several hundred to several thousand times with water. Since the regenerate is rich in a high- quality fat, it can be utilized as a rust-proofing liquid, derusting liquid, polishing liquid, etc., after proper dilution.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for fermenting bonito processing residue (a sludge-like product obtained by dehydrating fish body processing waste liquid, residue containing internal organs, blood, etc.) and recycling it as fertilizer or fat.

[Conventional technology]

Previously, waste fluid from fish processing and residue containing internal organs and blood discharged from bonito processing plants had a strong odor, so they were collected at waste processing plants, dehydrated until they became sludge-like, and then incinerated. .

[Problem to be solved by the invention 1fil By the way, compared to other fish, bonito not only tastes good, but also has high nutritional value, and is also rich in fat, which is comparable to that of whales. Naturally, since the processing residue is of such high quality, it also contains a large amount of effective ingredients for use as fertilizer, as well as a large amount of high-quality fat. However, in the past, there was no appropriate treatment method to remove the foul odor and decompose unnecessary components from the processing residue, so even if attempts were made to use it effectively as fertilizer or fat, it could not be commercialized, and it had no choice but to be incinerated. The reality was that The purpose of the present invention is to find an appropriate treatment method for removing the bad odor and decomposing unnecessary components from the processing residue of bonito, and to make it possible to recycle it as fertilizer or fat in a factory production manner. [Means for Solving the Problems] The method of the present invention involves fermenting bonito processing residue containing fat in a fermentation tank while stirring with air and heating to about 40°C. Gradually add water as the process progresses.

[For production]

The processing residue of bonito contains a large amount of nutrients that are rich in nutrients for bacteria, and if you blow air through it and ferment it at a temperature of about 40°C while stirring it, it will be extremely resistant to bacteria. Conditions are favorable for breeding, and a large number of bacteria decompose the fat and the elements of fertilizer, such as nitrogen, F4 acid, and potash, and other malodorous components other than the active ingredients, and release them as gas. As the fermentation progresses, water is gradually mixed in to remove the contaminants and gradually increase the transparency, resulting in a colorless and transparent jelly-like product.

【Example】

An embodiment of the present invention will be described below. The drawing shows a flow route of a fermentation processing apparatus for carrying out the method of the invention. In the figure, three fermentation tanks 1 are installed side by side indoors or in a basement, and the processing residue of bonito is fed into them. Each fermenter! An air blowing pipe 2 is horizontally installed near the bottom of the chamber, and a spiral heating pipe 3 is horizontally installed slightly above the air blowing pipe 2. The air blowing pipe 2 is connected to an air compressor 5 via an air supply pipe 4, and air is fed into the three fermentation tanks 1 from the air compressor 5 all at once. The heating pipe 3 is connected to a steam hender 7 via a steam supply pipe 6 and to a soft water tank 9 via a steam return pipe 8. The soft water tank 9 can be supplied with water from a general water pipe. The steam header 7 is connected to a boiler 11 via a steam supply pipe 10, and the steam from the two boilers 11 is simultaneously supplied to the heating pipe 3 through the steam header 7, and the processed residue in the three fermenters 1 is is heated by the heat of the steam. The steam used for heating is collected in the soft water tank 9 as soft water. Each fermenter 1 has a temperature sensor l2 that detects its internal temperature.
An automatic opening/closing valve 13 is provided on the supply side of each heating tube 3, and is automatically opened and closed according to the temperature detected by the temperature sensor 12. In each ugly fermentation tank 1, when the internal temperature falls below, for example, about 40°C, an automatic opening/closing valve 1 is activated.
3 is opened and steam is supplied to the heating pipe 3, and when the temperature exceeds that temperature, the automatic on-off valve 13 is closed and the supply of steam is cut off. Therefore, the inside of each fermentation tank 1 is automatically controlled to maintain a temperature of about 40°C, and the processed residue in each fermentation tank 1 is heated to about 40°C by the air blown out from the air blowing pipe 2. Ferment while stirring. Furthermore, water can be supplied into each fermentation tank 1 from a soft water tank 9 through a water supply pipe 14. As mentioned above, the processing residue of bonito is fermented in each fermentation tank 1 for several days to several tens of days while being stirred with air at a temperature of about 40 degrees Celsius, and the fermentation is promoted by the air. When water is gradually mixed with the progress of fermentation and water evaporation, the contaminants in the processing residue are decomposed by bacteria, and a large amount of gas is generated while bubbling, and the processing residue is mixed with water as fermentation progresses and the amount of water mixed increases. As time passes, its transparency gradually increases, and it becomes an almost colorless and transparent jelly-like product that contains a lot of fat and has almost no fishy odor. That is, fermentation is carried out while stirring with air and heating while mixing water appropriately until such a state is reached. It should be noted that the fermentation temperature condition is preferably about 40°C, but is not limited to this. The colorless and transparent regenerated material thus obtained can be used as a liquid fertilizer by diluting it hundreds to thousands of times with water. According to one analysis result, even when the bonito processing residue raw material is diluted to a total of about 1000 times including the water added during fermentation, the nitrogen content is about 12% by the sulfuric acid method.
/kg, phosphoric acid is about 1.3 by the ammonia molybdate method
mg/kg, potash is about 7.3 kg/kg using the flame method, and when we actually tested it on plants, we found that it grew better than regular chemical fertilizers, probably due to the influence of other ingredients besides these three ingredients. It was good. Furthermore, since it contains a large amount of high-quality fat, it was found that by diluting it appropriately, it can be used as a rust preventive liquid, a rust remover liquid, a polishing liquid, etc. The gases fermented with mackerel in the sake fermentation tank 1 are discharged from the ugly fermentation tank 1 through the exhaust pipe 15, but some of the light gas with less bad odor is directly released into the atmosphere from the chimney 17 through the exhaust pipe 16. On the other hand, after the heavy gas containing bad odor is separated into mist by the mist separator 18, it is combusted by the boiler 11, and the combustion gas is exhausted into the atmosphere from the chimney 17. Poiler 11 is an oil storage tank 19 installed outdoors.
Fuel oil is supplied from the tank 20 by a pump 20, and water is supplied by a pump 21 from the soft water tank 9. By heating the water from the soft water tank 9 through combustion in the boiler l1, steam to be supplied to the heating tube 3 is obtained.

【Effect of the invention】

According to the present invention, processing residue of bonito that has been incinerated until now can be
Liquid fertilizer and anti-rust liquid without fish odor! # Can be effectively recycled as removal liquid, polishing liquid, etc. Also, since no chemical treatment is applied, it does not cause any pollution. Furthermore, the processing facilities are simple and the running costs are low, so it can be recycled economically. This is the default. l...Fermentation tank, 2...Air blowing pipe,
3... Heating tube, 4... Air supply piping, 5.
...Air compressor, 6...Steam supply piping, 14...Water supply piping. patent applicant
Yasuo Kawaguchi

[Brief explanation of drawings]

Claims (1)

[Claims] 1. The processing residue of bonito containing fat is fermented in a fermentation tank at a temperature of about 40°C while stirring with air, and water is gradually mixed in as the fermentation progresses. How to treat bonito processing residue.