Method for preparing saline-alkali soil improvement agent by adopting coal slag

Abstract

The invention belongs to the technical field of saline-alkali soil improvement and particularly relates to a method for preparing a saline-alkali soil improvement agent by adopting coal slag. The method comprises the following steps: mixing gasifying furnace slag, municipal sludge and mushroom residue according to the weight ratio of 4:5:1, and stirring uniformly; carrying out standing fermentation after the mixed materials are piled, carrying out pile turning at every interval of 3 days after the temperature is higher than 45 DEG C, and adopting natural fermentation instead of pile turning treatment for the mixed materials after the temperature is lower than 35 DEG C; and after the mixed materials are fermented for 45 days, controlling the water content of the mixed materials to be less than or equal to 40%, namely obtaining the saline-alkali soil improvement agent. The method has the advantages that the preparation method is simple, and wastes can be recycled; and by application of the improvement agent, the environmental pollution can be reduced to a greater extent, the physical and chemical properties of saline-alkali soil can be improved, the plantability and the soil workability of the saline-alkali soil can be improved and the method has good demonstration and pushing significance for treating and disposing solid-waste pollution and restoring the ecological environment of the ground vegetation.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali soil improvement, and in particular relates to a method for preparing a saline-alkali soil improver by using coal slag. Background technique [0002] At present, my country's annual output of coal slag exceeds 100 million tons, and urban sludge exceeds 30 million tons. The huge amount of solid waste resources can only be disposed of by landfill or orderly stacking, which is far from being able to effectively solve the solid waste, eventually causing groundwater pollution. , Atmospheric environmental pollution. There are about 100 million hm2 of various types of saline-alkali land in my country, including about 37 million hm2 of modern (active) saline-alkali land, 45 million hm2 of residual saline-alkali land, and 17 million hm2 of potential saline-alkali land. Saline-alkali land has not been developed and utilized. Research on how to utilize the resource utilization of cinder and sludge to i...

AI Technical Summary

Problems solved by technology

[0002] At present, my country's annual output of coal slag exceeds 100 million tons, and urban sludge exceeds 30 million tons. The huge amount of solid waste resources generated only depends on landfill or orderly stacking, which is far from being effectively solved for solid waste, and eventually causes groundwater pollution. , air pollution

There are about 100 million hm2 of various types of saline-alkali land in my country, including about 37 million hm2 of modern (active) saline-alkali land, 45 million hm2 of residual saline-alkali land, and 17 million hm2 of potential saline-alkali land. Saline-alkali land has not been developed and utilized