Wastewater treatment method in papermaking process

Abstract

The invention discloses a wastewater treatment method in a papermaking process. the method comprises the following steps: adding a sterilizing agent into wastewater to directly kill bacteria and inhibit the bacteria growth, wherein the sterilizing agent is prepared from 3 parts of validamycin, 3 parts of sodium carbonate, 2 parts of sodium phenolate, 1 part of potassium sorbate and 1 part of bis-stilboestol sodium; diluting the sterilizing agent with water for 100 times to obtain a sterilizing solution; metering the wastewater with a metering pump; and adding 2-10Kg of sterilizing solution to each ton of wastewater. The method disclosed by the invention is convenient to operate and does not need additional infrastructure or equipment investment; one-time sterilization can be realized simply by proportionally adding the prepared sterilizing solution into the wastewater; and the sterilizing speed is high, the treatment cost for each ton of wastewater is only 0.05-0.5 yuan, the labor productivity can be increased, the labor intensity is reduced, and the production cost is saved.

Description

technical field [0001] The invention belongs to the technical field of papermaking production, and in particular relates to a wastewater treatment method in the papermaking process. Background technique [0002] In the papermaking process, about 30 to 80 tons of waste water will be generated for each ton of finished paper produced. The sources of this waste water are mainly washing blankets, washing nets, vacuum suction and excess water from raw pulp. Each ton of waste water contains 1.5 ~2.5Kg of paper fiber, a small amount of chemical auxiliary raw materials and impurities, this kind of wastewater is easy to breed bacteria, making the water deteriorate, black, smelly, and sticky. In the production process, in order to save water, realize the recycling of wastewater , the wastewater must be treated qualified before it can be recycled. In the existing traditional technology, one method is to build a large number of volumetric tanks, and cultivate beneficial bacteria in the v...

AI Technical Summary

Problems solved by technology

[0002] In the papermaking process, about 30 to 80 tons of waste water will be generated for each ton of finished paper produced. The sources of this waste water are mainly washing blankets, washing nets, vacuum suction and excess water from raw pulp. Each ton of waste water contains 1.5 ~2.5Kg of paper fiber, a small amount of chemical auxiliary raw materials and impurities, this kind of wastewater is easy to breed bacteria, making the water deteriorate, black, smelly, and sticky. In the production process, in order to save water, realize the recycling of wastewater , the wastewater must be treated qualified before it can be recycled. In the existing traditional technology, one method is to build a large number of volumetric tanks, and cultivate beneficial bacteria in the volumetric tanks to eliminate harmful bacteria. Another method is to directly use microbiology Pore ​​filter for filtration, the method of cultivating beneficial bacteria in the volumetric pool to eliminate harmful bacteria, the investment is large, the floor area is large, and the cultivation time of beneficial bacteria is long, while the microporous filter has high energy consumption and low processing capacity. The main problems of this method are: large investment, complicated treatment process, long treatment time, 0.5-5 yuan per ton of wastewater treatment cost, high operating cost, and the phenomenon that the treatment is not thorough and affects normal production, and it is also easy to affect production The enthusiasm of enterprises to utilize wastewater leads to the direct discharge of papermaking wastewater, causing pollution to the environment