Papermaking wastewater treatment method

Abstract

The invention discloses a papermaking wastewater treatment method. The method comprises the steps of filtration, gas washing, pH adjustment, flocculating precipitation, decoloring, advanced oxidation and plasma disinfection. The method disclosed in the invention has substantially higher pollutant removal ability than the prior art; and ultraviolet light is introduced into a three dimensional electrode / electro-Fenton reaction system, and an anode plate with an ultraviolet photocatalysis performance and a particle electrode are adopted to substitute traditional electrodes, so the photoelectro-synergistic catalysis reaction of the three dimensional electrode / electro-Fenton reaction system is carried out by using ultraviolet light, the energy consumption of the three dimensional electrode / electro-Fenton reaction system is reduced, a synergistic catalytic oxidation effect is generated, and organic pollutions are efficiently and rapidly degraded. Fire coal flue gas waste is used to purify the papermaking wastewater, the acidic gas SO2 in the flue gas is used to neutralize in order to remove alkaline substances in the wastewater, and flue dust particles in the flue gas are used to remove short fibers and other suspension in the wastewater in order to realize treatment of wastes by using other wastes. Organic matters and other pollutants contained in water are effectively removed through a plasma discharge technology.

Description

technical field [0001] The invention relates to a treatment method for papermaking wastewater, which belongs to the field of water treatment in environmental protection. Background technique [0002] The paper industry occupies a certain position in the national economy, and the consumption level of paper and cardboard is one of the important symbols to measure the level of modernization and civilization. At the same time, it is well known that the paper industry is a major water polluter. Therefore, in order to control pollution and protect the environment, it is urgent to solve the problem of coordinated development of the paper industry and environmental protection. [0003] The pulping rate of general chemical pulping is about 45%-50%, that is, 45%-50% of the fiber raw materials will become waste in the pulping process. Even though the pulping rate of BCTMP (bleached chemical mechanical pulp) and APMP (alkaline hydrogen peroxide chemical mechanical pulp) which are now ...

AI Technical Summary

Problems solved by technology

However, sometimes pulping wastewater has high pollutant content, heavy load, and a large number of biodegradable macromolecules, so it is difficult for wastewater to meet the standard after traditional treatment.

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