Method for producing biological bactericide by using paper-making wastewater

Abstract

The invention discloses a method for producing a biological bactericide by using paper-making wastewater and belongs to the technical field of the production of biological bactericides. According to the method, pollutions caused by paper-making black liquid can be treated while a high-quality biological bactericide is produced, and circulating economic benefits for the paper-making industry are implemented. The method comprises the following steps of: extracting the paper-making black liquid produced by pulping by using potassium carbonate; adding 100 parts by weight of the black liquid into a fermenting device, adding 1-5 parts by weight of sugar or 2-10 parts by weight of molasses, adding 0-20 parts by weight of humic acid or 0-5 parts by weight of defluorinated phosphoric acid, and adjusting the pH value to less than or equal to 8; pouring ozone and sterilizing for about 2 hours; adding 1-3 parts by weight of an anaerobic and facultative anaerobic compound biological bactericide into the fermenting device after the sterilization is finished for one hour, and expanding propagation for 72 hours; and adding aerobiotic bactericide which is 0.1-10% of the weight of the paper-making black liquid to compound till the living bacterium quantity of the produced biological bactericide is greater than or equal to 2 billion/ml. The method for producing the biological bactericide by using paper-making wastewater is low in cost, simple to operate, high in number of living bacterium in the product, rich in nutrient substances such as phosphorus potassium humate and high in quality, turns the paper-making liquid into wealth and realizes the effective utilization of resources, so that the problem of environment pollution is solved, good economic benefits are brought while high cost for environmental protection is saved, and the possibility for the popularization of a potassium carbonate pulping process is provided.

Description

technical field [0001] The invention belongs to the technical field of biological bacterial agent production, and relates to a method for producing biological bacterial agent by using papermaking wastewater. The method of the invention can control the pollution caused by industrial waste such as papermaking wastewater (especially papermaking black liquor produced by potash pulping) while producing the biological bacterial agent. Background technique [0002] Papermaking wastewater mainly comes from the two production processes of pulping and papermaking in the papermaking industry. Paper mills discharge three streams of water according to the process, one is pulping and cooking waste liquid, commonly known as papermaking black liquor; It can be reused after treatment. The middle stage water is the remaining part of incomplete extraction of black liquor, within 10% of the total amount. Pollutants contained in black liquor account for more than 90% of the total pollution di...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for producing biological agents by using papermaking wastewater to solve the pollution and resource waste of papermaking wastewater (especially papermaking black liquor produced by potash-alkaline pulping)