Method of preparing organic nutritional soil from municipal sludge

Abstract

The invention provides a method of preparing organic nutritional soil from municipal sludge. The method comprises following steps: step one, dehydrating municipal sludge, evenly stirring, and introducing the municipal sludge into a fermenting tank; step two, introducing mixed sludge into a decomposition tank, and adding eisenia foetida; step three, separating earthworms from the decomposed materials; step four, adding urea, diammonium phosphate, manganese sulfate, cerium nitrate, potassium humate, and a granulation aid into the decomposed materials obtained in the step three to obtain a mixedmaterial, and carrying out granulation; step five, preparing a mixed solution from sodium carboxymethyl cellulose, ammonium persulfate, and an ethanol solution of epoxy chloropropane; step six, wetting the basic fertilizer particles by the mixed solution, and storing the particles for 1 to 2 hours at a temperature of 80 to 88 DEG C to obtain organic nutritional soil particles; and step seven, filling the organic nutritional soil particles into bags for later use. The fermented organic fertilizers, inorganic fertilizers, and humus are compounded to prepare the organic nutritional soil, which can supply comprehensive nutritional elements for the growth of plants and is capable of promoting the growth of young plants.

Description

technical field [0001] The invention relates to the technical field of soil, and more specifically relates to a method for preparing organic nutrient soil from municipal sludge. Background technique [0002] Urban landscaping is an important part of modern urban construction. At present, more and more urban residents in our country live in high-rise buildings, and the demand for indoor greening plants is increasing. Fertilizer is the source of green plant nutrients. Whether it is reasonable or not directly affects the yield and quality of green plants, so this puts forward higher requirements for the sowing substrate of green plants; traditional nutrient soil generally adds traditional elemental fertilizers, compound fertilizers, etc. to field soil, Nutrients are released quickly and are difficult to be comprehensively utilized by plants. Most of the nutrients in fertilizers are easily leached and volatilized, resulting in low plant utilization; and in recent years, with the...

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Problems solved by technology

[0002] Urban landscaping is an important part of modern urban construction. At present, more and more urban residents in our country live in high-rise buildings, and the demand for indoor greening plants is increasing. Fertilizer is the source of green plant nutrients. Whether it is reasonable or not directly affects the yield and quality of green plants, so this puts forward higher requirements for the sowing substrate of green plants; traditional nutrient soil generally adds traditional elemental fertilizers, compound fertilizers, etc. to field soil, Nutrients are released quickly and are difficult to be comprehensively utilized by plants. Most of the nutrients in fertilizers are easily leached and volatilized, resulting in low plant utilization; and in recent years, with the development of cities and the increase of population, the urban sewage sludge The amount of discharge is increasing, and the utilization of municipal sewage sludge has become very necessary and urgent, and the rich organic matter and nutrients in sewage sludge have become the necessary conditions for it to be used by plants

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