Production process and production device of composite fertilizer doped with sludge of domestic sewage plant

Abstract

The invention discloses a production process and a production device of composite fertilizer doped with sludge of a domestic sewage plant. The production process comprises the following steps: 1, treating sludge; 2, fermenting; 3, sterilizing and drying; 4, adding other fertilizer elements; 5, sieving, packaging and warehousing. The production device of the composite fertilizer comprises a stirring pool, a concentration and dehydration machine, a crushing and stirring machine, a fermenting pool, a crushing machine, a roller type electric sieve, a first stirring machine, a drying machine, a second stirring machine and a pelletizing machine, wherein the stirring pool is connected with the concentration and dehydration machine; the outlet of the crushing and stirring machine is connected with the fermenting pool; the outlet of the crushing machine is connected with the roller type electric sieve; the outlet of the first stirring machine is connected with the inlet of the drying machine; the outlet of the second stirring machine is connected with the pelletizing machine. The production process and the production device have the beneficial effects of greatly reducing the sludge treatment cost, converting the sludge into organic and inorganic compound fertilizer, activating soil, breaking harden soil, promoting the growth and development of crops and increasing yield.

Description

technical field [0001] The invention relates to a compound fertilizer production process and a production device, in particular to a compound fertilizer production process and a production device mixed with domestic sewage plant sludge. Background technique [0002] At present, urban sewage plants will produce a large amount of sludge in the process of sewage treatment. The sludge contains many parasites, pathogenic bacteria and toxic heavy metals, and will emit a large amount of toxic gas, which can be smelled in a large area around If the sludge is not properly treated, it will easily cause secondary pollution, and the rapid spread of pathogenic bacteria and parasites will destroy the surrounding ecological environment. [0003] At present, most of the existing sludge treatment methods are incineration, landfill and sea reclamation. Incineration can achieve the effect of disinfection and sterilization, but the cost of incineration and disposal of sludge is relatively high,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compound fertilizer production process and production device mixed with domestic sewage plant sludge in order to solve the problems of high sludge cost and environmental pollution produced by existing sewage treatment plants

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