Method for producing phosphate-fertilizer with urban refuse as raw material

Abstract

Production of phosphate fertilizer by urban refuse is carried out by crushing, separating, recovering reused substances from urban refuse, sterilizing by caustic lime, crushing for separated refuse, adding into baking accessories and phosphate fertilizer, inducing while heating for 2-5 days to obtain organics and organic salts, adding vegetable cake into rotted refuse, agitating, naturally fermenting for 2-3 days, delivering fermented refuse into drying kiln, drying, grinding dried refuse to 200 meshes, screening and packing to obtain powdery fertilizer. It's efficient, cheap, has various raw materials and no environmental pollution and can be reutilized.

Description

Technical field: [0001] The invention relates to waste recycling, especially urban waste recycling and reuse. Background technique: [0002] At present, the amount of daily garbage in the city is extremely huge and its composition is complex. Except for plastic waste, metal waste, rubber waste, etc., most of the remaining waste is rich in organic matter, inorganic matter and minerals. Waste disposal is an important issue. The use of open-air stacking and landfill covers a large area and causes ground and groundwater pollution. Most of them use incineration, but the incineration flue gas contains harmful components such as chlorine, fluorine, and sulfur dioxide, which pollutes the atmosphere. Garbage after incineration There are also harmful substances in the ash, and the amount of garbage ash is also very large. If no suitable use is found, a large amount of farmland will be occupied, and the secondary pollution will be serious. Invention content: [0003] The purpose of ...

AI Technical Summary

Problems solved by technology

[0002] At present, the amount of daily garbage in the city is extremely huge and its composition is complex. Except for plastic waste, metal waste, rubber waste, etc., most of the remaining waste is rich in organic matter, inorganic matter and minerals. Waste disposal is an important issue. The use of open-air stacking and landfill covers a large area and causes ground and groundwater pollution. Most of them use incineration, but the incineration flue gas contains harmful components such as chlorine, fluorine, and sulfur dioxide, which pollutes the atmosphere. Garbage after incineration There are also harmful substances in the ash, and the amount of garbage ash is also large. If no suitable use is found, a large amount of farmland will be occupied, and the secondary pollution will be serious.