Aerobic composting method of food residue

Abstract

The invention discloses an aerobic composting method of food residue, and the method comprises the following steps: A. adding water to the food residue, performing rinsing and desalination treatment on the food residue to dilute and reduce salt content of the food residue; B. performing high-speed centrifugal dewatering treatment on the rinsed and desalinized food residue; and C. putting the dewatered food residue, auxiliary materials, biological agents and biological growth promoters in a biological reactor according to a preset proportion, and allowing aerobic digestion at high temperature to obtain an organic fertilizer. In the method, salt content and moisture in the food residue are reduced by pretreatment of the food residue, and special biological agents are used for increasing content of nutritive substances. An organic fertilizer product prepared by the method has the advantages of low moisture content, high organic matter content, low content of salt and other impurities, and high content of nutritive substances such as nitrogen, phosphorus and the like.

Description

technical field [0001] The invention relates to a method for treating urban domestic waste, in particular to an aerobic composting method for kitchen waste. Background technique [0002] The content of organic matter in food waste is high, and the use of bacteria, actinomycetes, fungi and other microorganisms widely distributed in nature can promote the transformation of degradable organic matter in food waste into stable humus under certain artificial conditions, and finally produce high-quality organic fertilizer. However, most of the fertilizer production methods do not use the pretreatment part, or the pretreatment effect is not obvious, which directly leads to the low quality of the fertilizer produced from the food waste, and there are many impurities, which will have adverse effects on the land and crops. [0003] The fertilizer technology of food waste mainly includes effective food waste treatment equipment and large-scale organic waste composting system. [0004]...

AI Technical Summary

Problems solved by technology

However, no matter which method is used, there is no relevant pretreatment equipment, so the product quality is unstable and there are many impurities. Among them, the shortcomings of high salt content and high oil content are the most prominent. Using this kind of fertilizer will not only easily lead to soil compaction, but also damage to plants

At the same time, because these methods generally use the indigenous bacteria in the kitchen waste, the efficiency is not high, and the fertilizers produced have less nutrient elements such as N and P.

[0005] Although there are relevant treatment measures in the large-scale food waste composting system, there is no special treatment for the characteristics of high salt content and high fat content of food waste

At the same time, large-scale composting systems need to collect and process food waste in a unified manner, which not only increases the cost, but also brings difficulties in collecting, storing, and cleaning equipment.

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