Method for producing soil amendment by using papermaking black liquor wastewater and waste paper sludge

Abstract

The invention relates to a method for producing a soil amendment by using papermaking black liquor wastewater and waste paper sludge, which is characterized by comprising the following steps: carrying out a neutralization reaction on the black liquor wastewater and the waste paper sludge from a paper mill and furfural waste liquid, waste mother liquor from a cystine plant, waste acid liquor from a gourmet powder factory, pickling waste liquor from a zinc plating plant and waste liquor containing ferrous sulphate from a titanium pigment plant; adsorbing with calcium superphosphate and humic acid, and meanwhile mixing and activating medium and trace nutrient elements and beneficial elements in alkali, and adjusting to reach the optimum pH value of 5-8, thus obtaining the soil amendment. In the invention, the soil amendment produced with the papermaking black liquor wastewater and the waste paper sludge has the following obvious advantages: loosening soil aggregate, radically treating saline and alkaline land, causing crops to have developed root system, flourish leaves, thick and strong straws, and full seeds, and increasing crop disease resistance. Due to drought resistance, saline-alkali tolerance and greatly-increased crop yield, the soil amendment is an effective organic compound fertilizer.

Description

technical field [0001] The invention relates to a natural soil regulating material or soil stabilizing material, in particular to a method for producing a soil conditioner by utilizing papermaking black liquor wastewater and waste paper mud. Background technique [0002] Acidic soil is mainly distributed in the southern region, and the types include: brown soil, cinnamon soil, Lou soil, gray cinnamon soil, irrigation silt soil, etc. Alkaline soil is mostly distributed in the northern region, and the types include: alkaline soil, loess soil, black loam soil, brown calcium soil, chestnut soil and so on. Acidic soils are mineral soils mostly located in high temperature and rainy areas. The organic matter and nutrients in the soil components are poor and the mineral content is high. Due to frequent rainfall, the alkaline components in the soil such as ammonium, potassium, calcium, and magnesium ions are severely leached, and acidic substances such as iron and aluminum that are ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of low cost, simple production process, large improvement application range and good fertilizer efficiency to solve the shortcomings of the existing soil improver, such as high cost, complex production process, small improvement application range, and poor fertilizer efficiency. Method for producing soil conditioner by utilizing papermaking black liquor wastewater and waste paper sludge