Method for producing organic-inorganic mixed fertilizer by using black liquid extracted through pulping of biological enzyme pre-treatment alkaline wheat straw

Abstract

The invention relates to a method for producing an organic-inorganic mixed fertilizer by using a black liquid extracted through pulping of biological enzyme pre-treatment alkaline wheat straw, and belongs to the field of fertilizer production. The method comprises: black liquid extraction after pre-treatment of wheat straw with biological enzyme, pre-treated alkaline wheat straw pulp black liquid extraction, and organic-inorganic mixed fertilizer production, wherein the black liquid extraction after the pre-treatment of the wheat straw with the biological enzyme comprises wet method material preparing, biological pre-treatment, wheat straw extrusion treatment to produce the black liquid, and conveying of the black liquid to a black liquid storage groove, the alkaline wheat straw pulp black liquid extraction comprises alkaline cooking of wheat straw after the pre-treatment, screening of the black liquid and the coarse pulp after the extrusion through a pulp extrusion device, countercurrent washing of the coarse pulp through four pulp washing devices connected in series to extract the black liquid, and conveying of the black liquid to the black liquid storage groove, and the organic-inorganic mixed fertilizer production comprises that the black liquid mixed in the black liquid storage groove passes through a black liquid filter, the obtained black liquid is concentrated through an evaporation station, the concentrated black liquid is passes through a pulp spraying granulation machine and a hot and cold screening system, and the organic-inorganic mixed fertilizer finished product is packaged. According to the present invention, the waste is turned into treasure, and the produced fertilizer is rich in biological agents, and has effects of plant disease resistance promoting and high yield.

Description

technical field [0001] The invention belongs to the field of fertilizer production, in particular to a method for producing organic-inorganic mixed fertilizer from black liquor extracted from alkaline wheat straw pulping with biological enzyme pretreatment. Background technique [0002] At present, paper mills generally use the reaction process of chemical dissolution and lignin removal for cooking. General chemical pulping not only needs to use various chemicals, but also has high cost and high energy consumption. However, using biological enzymes to degrade lignin and pretreat wheat straw is simple and has no pollution to the environment. The lignin of wheat straw is degraded into low molecular lignin, which increases the ability of lignin to dissolve and be extracted, thereby realizing the Separation of cellulose from cellulose and hemicellulose. The pretreated wheat straw is then used for alkaline pulping to produce natural tissue paper. In the process of pretreatment ...

AI Technical Summary

Problems solved by technology

At present, no method has been found to produce organic-inorganic mixed fertilizer from black liquor extracted from alkaline wheat straw pulping with biological enzyme pretreatment