Method of preparing organic fertilizer by adding crop straws into urban household garbage

Abstract

The invention discloses a method of preparing an organic fertilizer by adding crop straws into urban household garbage. The method comprises the following steps: sorting and screening household garbage to remove thick garbage and non-biodegradable substances, sorting and recycling recoverable objects such as paper, plastic and metals, and sorting combustibles comprising plants and waste clothes and feeding the same into a combustor to combust; and after crushing and screening the residual garbage, preparing the organic fertilizer according to the steps of pre-treating straws, adding an active culture, performing primary fermentation, separating inorganic components and performing secondary fermentation. The water content of the compost raw materials is uniform and consistent, and the porosity of the compost raw materials is increased, so that microbial breeding is facilitated and the fermenting speed is increased; the urban household garbage is thoroughly degraded, so that the environmental pollution caused by the urban household garbage is solved, and the organic fertilizer can be produced on a large scale.

Description

technical field [0001] The invention belongs to the field of organic solid waste treatment, and in particular relates to a method for preparing organic fertilizer based on municipal solid waste. Background technique [0002] With the increase of the urban population and the improvement of people's living standards, the amount of municipal solid waste produced is increasing day by day. As of now, the annual average annual removal volume of urban domestic waste in the country is 212 million tons, the annual waste discharge in rural areas is 300 million tons, the discharge of livestock and poultry manure is about 3 billion tons, and the annual production of crop straw is about 700 million tons. Urban garbage is piled up like a mountain, and it has not been effectively treated. In some places, the phenomenon of garbage siege has appeared. At the same time, the content of organic matter in municipal solid waste is getting higher and higher, and more and more toxic and harmful ga...

AI Technical Summary

Problems solved by technology

Due to the imbalance of nutrient elements such as carbon and nitrogen in the raw materials, it is easy to cause the accumulation of VFA in the digestive system, the pH decreases, and the physiological activity of microorganisms is inhibited. There are problems such as long fermentation time, difficult to eliminate odor and unstable product quality.

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