Paper-making wastewater treatment process

Abstract

The invention discloses a paper-making wastewater treatment process. The process comprises the following steps: 1, delivering wastewater to an oxidation pond, performing primary treatment by utilizingan anaerobic selector, the oxidation pond and a secondary purifier, and initially removing extract and resin fatty acid to remove 85-90 percent of extract and 86-92 percent of resin fatty acid in thewater; 2, treating sulfate bleaching slurry wastewater treated in the step 1 with the secondary purifier to remove SS, COD, BOD, AOX, lignin and chromaticity in the wastewater, performing biologicaltreatment on white rot fungi, removing COD and BOD in the wastewater to perform first stage removing operation on SS, COD, BOD, AOX, lignin and chromaticity in the wastewater; and 3, proportioning a sodium chloride solution and sodium hexametaphosphate in a ratio of 2:5, performing dispersing vibration at the temperature of 70-75 DEG C for 70-75 minutes with an ultrasonic generator. According to the process, the time for treating wastewater can be improved, and the whole paper-making production efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a papermaking wastewater treatment process. Background technique [0002] The papermaking industry has a large amount of wastewater discharge, high SS, BOD, and COD values; the pollution load accounts for more than 80% of the pollution load of the whole plant, especially the pulp bleaching wastewater, whose pollution load is second only to cooking in the entire pulp and papermaking process For waste liquid, the traditional single treatment method has its own advantages and disadvantages, and the recycling rate of waste water after treatment is low. Contents of the invention [0003] The object of the present invention is to provide a kind of papermaking wastewater treatment process, to solve the papermaking wastewater discharge amount proposed in the above-mentioned background technology is big, SS, BOD, COD value are high; The pollution load accounts f...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of papermaking wastewater treatment process, to solve the papermaking wastewater discharge amount proposed in the above-mentioned background technology is big, SS, BOD, COD value are high; The pollution load accounts for more than 80% of the whole plant pollution load, especially It is pulp bleaching wastewater, its pollution load is second only to cooking waste liquor in the whole pulping and papermaking process, the traditional single treatment method has its own advantages and disadvantages, and the recycling rate of wastewater after treatment is low