Treatment method for radical curing black liquor of straw pulp from alkaline process

Abstract

This invention provides a method for treating black liquor from alkali-process straw pulp, and the application of the byproduct. The method comprises: sending fresh black liquor from alkali-process straw pulp (pH is 12-13) into an anaerobic bioreactor containing Bacillus licheniformis, Staphylococcus aureus, and Halomonas sp., performing anaerobic biochemical treatment for 10-15 h to obtain active black liquor (pH is 7.5-8.0), aerating, evaporating, concentrating, and spray-granulating to obtain additive for fertilizer and feed, or industrial byproduct of petrochemical industry and power generation industry. Alternatively, the active black liquor can be directly deodored, sterilized by heating, and sprayed onto crops for improving the quality and increasing the yield, or added into feed for breeding chicks and pigs for stimulating the growth and accelerating the breeding speed. Compared with the present technique, the method can eliminate the environmental pollution of black liquor discharged from papermaking industry, and brings profit to medium and small papermaking plants that use straw as the raw material.

Description

1. Technical field

[0001] The invention relates to a papermaking sewage treatment technology, in particular to a treatment method for radically eradicating straw pulp black liquor by alkali process. 2. Background technology

[0002] At present, wood is used as the raw material for pulping and papermaking at home and abroad. The black liquor in the pulping process has the advantages of high calorific value and no silicon interference. of alkali, heat and lime. Due to the limited wood available for pulping and papermaking, most paper mills use non-woody fibers such as wheat straw, straw, reed, and bamboo as raw materials for pulping and papermaking, especially in Shandong and Henan provinces. Alkaline wheat straw pulping supports Chinese pulping Most of the paper industry has not only saved a large amount of foreign exchange for purchasing pulp and limited forest resources for the country, but also solved the problems of wheat straw storage and farmers' income generation in t...