Method for preparing special fertilizer by treating kitchen waste, sludge and domestic waste in one machine

Abstract

The invention relates to a method for preparing a special fertilizer by treating kitchen waste, sludge and domestic waste in one machine, which comprises the following steps: while sending domestic waste organic substances into a pulping machine, adding slurry, which is obtained by separating out nondegradable substances from the kitchen waste and crushing, and a proper amount of water from a feed port of the machine in a water addition mode, mixing the two wastes into fine uniform slurry, adding the sludge, and evenly stirring; and removing heavy metals, decomposing dioxin, carrying out microbial deep anaerobic fermentation, dehydrating, blending with material with bacteria, fermenting by high-temperature mineralization reaction, and carrying out a double-coordination production technique to produce the microbial organic fertilizer. The invention is beneficial to protecting and improving the ecological environment, can provide a high-quality fertilizer for agriculture, obviously improves the soil, enhances the crop yield and quality, and supports the sustainable development of agriculture. The invention is not only suitable for big cities, but also more suitable for medium and small cities and counties where the quantities of kitchen waste and sewage treatment plant sludge are small and independent treatment for kitchen waste and sludge is not cost-effective economically.

Description

technical field [0001] The invention relates to an organic fertilizer production method, which belongs to the technical field of fertilizer production, in particular to a method for producing special microbial organic fertilizers for various crops through simultaneous processing of kitchen waste, sludge and domestic waste. Background technique [0002] The current situation and existing problems of kitchen waste treatment: According to the information provided by relevant experts interviewed by China Economic Times, 50-60 million tons of kitchen waste is produced in the country every year. Cities are greater than 500 tons / day, 79 large cities are about 200-500 tons / day, and 238 small cities are about 50-100 tons / day. Compared with ordinary garbage, kitchen waste has high water content (70%-90%), high fat content (1%-5%), high salt content (1%-3%), and Rich in starch, fat, protein and other organic matter and other trace elements, it is a resource for making feed and organic...

AI Technical Summary

Problems solved by technology

Although the composting method utilizes a variety of nutrients in the sludge, unfortunately, the composting method cannot eliminate the hazards of heavy metals such as cadmium, mercury, lead, chromium, and arsenic, and the content of these five heavy metals is limited by the organic fertilizer standard; That is, the composting takes a long time to ferment (about 30 days), covers a large area, it is difficult to control the high-temperature mineralization reaction and the degree of fermentation maturity, the fertility is low, and it is difficult to sell

How to use sludge to produce fertilizer, there is no ideal technical solution yet

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