Fermentation treatment method and device of an organic waste

Abstract

The invention relates to a fermentation treatment method and a device of an organic waste. In the fermentation treatment of the organic waste (such as sludge, animal manure), high efficiency of high temperature fermentation and low moisture of a fermentation end product can be realized to make the post-treatment work (drying step) easy and perform the large batch treatment. A dehydration paper-making slurry and a cutting paper slice are mixed to be used as the auxiliary material, the high temperature fermentation treatment is high efficiency performed and after the fermentation object is subject to low-oxygen high-temperature fermentation treatment at the preset period in a first fermentation chamber (1) and the treated fermentation product is placed into a second fermentation chamber (2) and stirred up, therefore the vapor is generated by stirring up the loose fermentation product and the dehydration maturation fermentation treatment is performed in the second fermentation chamber (2) in the preset period.

Description

technical field [0001] The present invention relates to a fermentation treatment method of organic waste such as organic sludge with high water content and a fermentation treatment device used in the fermentation treatment method. Background technique [0002] Sludge as organic waste from various industries, such as food organic sludge, has a water content of 80% or more and is rich in protein and carbohydrates. If it is fertilized by fermentation, the waste can be effectively used. For this reason, various proposals have been made to ferment and realize composting under prescribed conditions. [0003] In particular, as a fermentation treatment means of organic sludge, such a means is known, that is, to organic sludge containing about 80 to 90% of moisture, add about 5% by weight of elongated paper cut body, to ensure that the paper The small space of the slender cut body in the disturbed state, thereby expanding the air contact area of ​​the sludge, can carry out aerobic f...

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Problems solved by technology

[0015] In addition, in the case of a single-tank fermentation device, although the fermentation object has fine voids formed by auxiliary materials inside, it is in the form of a block as a whole, and the water content of the fermentation-treated product taken out from the fermentation tank is 60%. ~75%, and the volume ratio to the treated object is also about 70-80%. When the fermented product is used as fertilizer, it is necessary to further natural drying (including secondary fermentation) and forced drying. Make it low moisture, its drying burden is very large

[0016] In addition, as disclosed in the above-mentioned Patent Document 2, the air volume of the air blower and the exhaust blower that supply air to the fermentation tank is controlled, while maintaining a constant negative pressure state (substantially also referred to as a hypoxic state). In the case of fermentation treatment, the part that receives the air supply in the treatment tank and is often in contact with fresh air is not necessarily treated at high temperature. From the perspective of the overall fermentation treatment, it can be said that the dehydration effect of this part is insufficient.

[0017] In addition, when the fermenter is a single unit, the fermentation object is put into the fermenter, and it is taken out after carrying out the fermentation treatment for a predetermined number of days, and the treatment is performed according to such a cycle that requires a certain period of time, and the treatment amount is determined by the volume of the treatment tank. , the cost of facilities increases in large-scale occasions, so it is not suitable for large-scale (mass processing)

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