Organic-inorganic compound fertilizer and production method thereof

Abstract

The invention discloses an organic-inorganic compound fertilizer and a production method thereof. The production method comprises the following steps: squeezing sludge until the water content is 60-70%; drying and dehydrating montmorillonite and zeolite, mixing with the squeezed sludge while hot; aerobically treating the mixture and drying to obtain powder, mixing the powder with urea, MAP (monoammonium phosphate) and potassium chloride, spraying sodium silicate to pelletize, drying, sterilizing and packing. The organic-inorganic compound fertilizer has the benefits that the problems of land occupation and secondary pollution caused by a great amount of sludge from an urban sewage treatment plant are solved, the fertilizer efficiency is obvious, better than that of various fertilizers on current market, and achieves the national compound fertilizer standard; the montmorillonite and the zeolite are capable of promoting the ion exchange of soil, improving the capacity of conserving nitrogen, phosphorus and potassium and other nutrients of the soil and improving the granular structure of the soil and has a remarkable effect of improving acid soil and saline alkali soil; since the sodium silicate contains about 65% effective silicon, the rice blast can be effectively resisted, and the product quality of crops can be improved.

Description

technical field [0001] The invention relates to a fertilizer and a production method thereof, in particular to an organic-inorganic compound fertilizer and a production method thereof, belonging to the field of fertilizer processing. Background technique [0002] The sludge produced in the sewage treatment process of urban domestic sewage treatment plants usually accounts for 0.07%-0.1% of the total sewage. my country has nearly a thousand large, medium and small cities, more than 17,000 towns, and an urban population of about 700 million. Taking 2004 as an example, the discharge of industrial wastewater was 22.2 billion cubic meters, and the discharge of urban domestic sewage was 26 billion cubic meters. Domestic sewage alone produced 130-260 million tons of sludge. Sewage treatment plants generally use piles or landfills to treat sludge, which not only takes up a lot of land resources, but also easily causes secondary pollution to the surrounding environment and groundwat...

AI Technical Summary

Problems solved by technology

Sewage treatment plants generally use piles or landfills to treat sludge, which not only takes up a lot of land resources, but also easily causes secondary pollution to the surrounding environment and groundwater resources.

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