Composite strain microbial dry powder for bio-pulping and environment-friendly energy-saving type composite strain bio-pulping process

Abstract

The invention relates to composite strain microbial dry powder for bio-pulping and an environment-friendly energy-saving type composite strain bio-pulping process. The composite strain microbial dry powder for bio-pulping is characterized in that two classes of microbes of 40 to 60 portions of lipolytic yeast and 30 to 50 portions of defibering strain in portion by weight are blended to prepare the composite strain microbial dry powder for pulping. The process is environment-friendly, energy-saving and high-efficiency, can effectively improve the effect and efficiency of separating and purifying straw cellulose through joint application of multi-strain, can not only use waste straw for pulping but also carry out harmless treatment on generated wastewater and radically solves the problem of pulping pollution.

Description

technical field [0001] The invention relates to a compound strain microorganism dry powder for biological pulping and an environment-friendly and energy-saving compound strain biological pulping process. Background technique [0002] Papermaking is divided into two process stages, one is pulping and the other is papermaking. Pulping is to separate the fibers from the plant raw materials, wash, screen, crush, and concentrate to make the original pulp, and some are bleached into white pulp according to the needs; papermaking is to dilute the pulp, flow it, Screening, pressing, molding and drying to make paper. The main component of pulping raw materials is cellulose, in addition to different degrees of hemicellulose, lignin, colloid, pigment and other substances. Among them, cellulose and hemicellulose are the basic components that need to be retained in pulping, while other components are substances that need to be removed. How to separate and purify cellulose and hemicell...

AI Technical Summary

Problems solved by technology

[0004] 1. Serious pollution, high COD and BOD of pulping black liquor, large amount of waste water, and mercaptan-like odor, because it contains a large amount of harmful chemical acid and alkali components, it cannot be directly used and discharged, but it is difficult to implement pollution control Large and costly;

[0005] 2. The utilization rate of paper-making resources is poor. my country’s paper-making raw materials are very rich, such as straw, wheat straw, asparagus, corn stalks, bamboo, reeds, sugar cane, cotton stalks and other herbs, straws of grasses, cotton linters, and broad-leaved wood. Woody plants with fibers, such as coniferous wood and wood waste, can be pulped

However, the traditional process uses rice straw, wheat straw, asparagus, corn and other straws to make pulp, causing serious pollution, high cost of pollution control and no effective control measures at present, so the precious straw resources cannot be used for papermaking, only some Straw is used as fertilizer or feed, except that a large amount of straw is treated as waste, abandoned in the fields, and more are burned or pushed into ditches and ponds, which not only wastes resources seriously, but also causes serious environmental pollution;

[0006] 3. The cooking pressure is as high as 5 atmospheres, and it needs to be cooked for more than 6 hours, which consumes a lot of energy;

[0007] 4. It has a great destructive effect on the tensile strength, bursting strength and tearing strength of pulp

[0008] In recent years, the traditional process of straw pulping has been ordered to stop due to serious pollution and high energy consumption. People have turned their attention to adopting biotechnology to use straw pulping, and to explore the use of microorganisms to degrade lignin and colloid in straw to separate and purify straw cellulose. Although some achievements have been made in pulping, the related technology cannot be industrialized due to the use of a single strain of bacteria to treat straw, slow speed, long cycle, and low pulp yield.