Strong oxidant for papermaking waste water CODcr degradation and method for degrading CODcr in waste water

Abstract

The invention aims to provide a strong oxidant for papermaking waste water CODcr degradation and a method for degrading CODcr in waste water, wherein the requirements on equipment operation and management are low, the equipment operating cost is low, the processing treatment efficiency is high, and secondary pollution can be prevented. The strong oxidant comprises the following components in parts by weight: 1 part of potassium permanganate, 10-60 parts of aluminum sulfate, 10-50 parts of ferric sulfate, and 10-50 parts of aluminum polychlorid. The method for degrading CODcr in waste water by utilizing the strong oxidant comprises the following steps: dissolving the strong oxidant in water in a proportion of 1: (5-20), then feeding in a coagulating basin for waste water treatment so as to carry out oxidation treatment, controlling the stirring speed at 50-100 rpm during the process and the reaction time to be 15-60 min, then feeding polyacrylamide as an auxiliary to complete the process of oxidation separation, and keeping the control time of the oxidant after dissolution within 1-12 hours. The strong oxidant and the method can be applied to the field of papermaking waste water treatment.

Description

technical field [0001] The invention relates to a papermaking wastewater COD cr Strong oxidizing agent for degradation and its effect on COD in wastewater cr The method of degradation treatment. Background technique [0002] With the process of world economy and industrialization, the discharge of industrial water and wastewater is gradually increasing, but the living environment of human beings is changing with the process of industrialization and the discharge of wastewater, and the living environment is getting worse and worse. Emissions have developed a relatively stringent emission standards. As a part of the industrialization process, papermaking has undoubtedly caused part of the environmental damage due to its huge water consumption and drainage. Papermaking wastewater accounts for about one-third of the country's total discharge, and its COD cr The emissions also accounted for one-third, in this case, the treatment of papermaking wastewater is even more importan...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic and foreign papermaking wastewater treatment methods mainly include physicochemical (sedimentation, air flotation, etc.), biochemical treatment (anaerobic, hydrolysis, aerobic, etc.), advanced treatment (Fenton advanced oxidation, air flotation advanced treatment, etc.), etc., Various treatment methods and process combinations have their own advantages and disadvantages, but it is difficult to achieve a certain efficiency, and it is difficult to achieve the emission target after treatment in a broad spectrum, effectively and economically.

Due to the existence of a large number of difficult-to-degrade components contained in papermaking wastewater, the biochemical efficiency is not high, and the COD of the effluent cr Unable to meet the emission standards, many companies have adopted subsequent advanced treatment processes, such as Fenton treatment. Fenton treatment is a treatment process that degrades refractory pollutants in water bodies by adding ferrous iron and hydrogen peroxide to form a strong oxidant. The effect is good, but its operating cost is high, the amount of sludge generated is large, and the requirements for equipment operation and management are relatively high. The most troublesome thing for the company is its high operating cost. Under the low profit of paper companies, This kind of treatment is very difficult for enterprises to survive