Method for preparing liquid organic fertilizer from kitchen waste

Abstract

The invention discloses a method for preparing a liquid organic fertilizer from kitchen waste as a raw material. The method comprises the following steps: (1) a feeding process, namely classifying the kitchen waste, separating inorganic matters and organic matters mixed in the kitchen waste; (2) a fermenting process, namely feeding the organic matters to a fermentation cabin, mixing the organic matters with a little of saw dust and flora, degrading and liquefying after fermentation; (3) a fertilizer blending process, namely entering a liquefied material inside a fertilizer blending box to prepare into the liquid organic fertilizer through a transport conduit. The method has no demands on the moisture content of the kitchen waste; the organic matters directly enter inside the fermentation cabin to carry out fermentation reaction under absence of dry and wet proportioning and oil-water separation; the oil-water separation step is avoided. Air supply and oxygen supply are not needed in the fermentation process; no gas is discharged outside. The degraded liquefied product flows inside a liquid collecting tank in the fertilizer blending process; impurities on a filter net can be fed to the fermentation cabin to continue to ferment again. By adopting the method, the targets of small investment, low energy consumption, short cycle, and in-situ resourceful treatment of the waste are achieved.

Description

technical field [0001] The invention relates to a method for preparing organic fertilizer by using kitchen waste, in particular to a method for preparing liquid organic fertilizer by using kitchen waste as raw material. Background technique [0002] The traditional food waste treatment methods in my country and even in the world mainly include water system dumping, incineration, landfill, aerobic composting, anaerobic fermentation, etc. The dumping of the water system pollutes the water body and destroys the ecological balance in the water; the incineration of kitchen waste requires a large amount of fuel and water-adjusting auxiliary materials such as wood, activated carbon, fuel oil, etc. due to the high water content, which consumes a lot of energy and investment. Dust pollutes the air, although the reduction is obvious, but it does not save energy; landfills cause soil pollution, pollute groundwater, and parasites can also affect the growth of animals and plants; oxygen-...

AI Technical Summary

Problems solved by technology

[0005] At present, there are many patent literature reports on the production of organic fertilizers from kitchen waste, but there are the above characteristics in the treatment: 1. High-temperature aerobic fermentation to produce solid organic fertilizers; 2. Anaerobic fermentation to produce organic fertilizers; 3. The process is complicated, the operating cost is high, it takes up a lot of human resources, and it occupies a large area; 3. In order to effectively kill the pathogenic microorganisms and parasite eggs caused by corruption, the pH value is generally equal to or close to 12, and some are even higher. If it is greater than 12, it is easy to cause volatilization and loss of ammonia gas under alkaline conditions, making the human body feel uncomfortable when it smells such gas

4. Although the death of pathogenic microorganisms and parasite eggs is caused under alkaline conditions, it also affects the death of effective degradative flora during the fermentation process, resulting in increased costs and poor treatment effects. After applying soil or plants, it will produce secondary fermentation, which will easily cause plant death

5. Fermentation only, screening treatment is not the purpose of scientific treatment of food waste and kitchen waste, and at the same time it cannot meet the national requirements of "harmless, reduced, stabilized, and resourceful" requirements

It is not energy-saving. After the organic matter reacts in the reaction chamber, it needs to be cleaned manually. It cannot be automated. Its heating is traditional electric heating, and the reaction temperature is above 60°C and needs to be kept for more than 12 hours.

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