Method for prevention and treatment of industrial pollution by comprehensively utilizing plant straw

Abstract

The invention provides a method for prevention and treatment of industrial pollution by comprehensively utilizing plant straw. The method includes the steps that the plant straw is smashed and added with water for high-temperature boiling treatment, and then hot water is used for washing; H2SO4 is added to solid matter after high-temperature boiling for continuous hydrolysis treatment, filtering is conducted after hydrolysis is completed, and hydrolyzed liquid is used as a raw material for manufacturing xylose; a NaOH solution is added into the hydrolyzed solid matter for high-temperature alkali cooking treatment and filtering is performed; the solid matter subjected to high-temperature alkali cooking treatment is used as a raw material for making paper or producing carboxymethylcellulose; and a HCl solution is added into the liquid subjected to high-temperature alkali cooking treatment for high-temperature acid cooking treatment, filtering is performed, the solid matter is used as a raw material for producing lignin, and filter liquor is evaporated into NaCl. By the adoption of the method, the plant straw is comprehensively utilized, pollution to the environment by making paper with the plant straw is removed, and the social effect and economic effect are good.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of plant straws and treatment of industrial pollution, in particular to a method for comprehensive utilization of plant straws to prevent and control industrial pollution. Background technique [0002] Plant straw is used as papermaking raw material for papermaking, which has the characteristics of widely available raw materials and low production cost. Therefore, in some small paper mills, plant straws are generally used as raw materials for papermaking. However, due to the current papermaking process, a large amount of papermaking wastewater, usually called "black liquor", will be produced in the production process, which has caused huge pollution to the environment. And the treatment of this papermaking wastewater is quite difficult, the treatment cost is high, and the treatment effect is poor. At present, there is no good method that can solve the sewage pollution problem of small pa...

AI Technical Summary

Problems solved by technology

However, due to the current papermaking process, a large amount of papermaking wastewater, usually called "black liquor", will be produced during the production process, causing huge pollution to the environment

And the treatment of this papermaking wastewater is quite difficult, the treatment cost is high, and the treatment effect is poor.

At present, there is no good method to solve the problem of sewage pollution in small paper mills that use plant straw as raw material.