Treatment method for removing COD (Chemical Oxygen Demand) in industrial wastewater

Abstract

The invention discloses a treatment method for removing COD (Chemical Oxygen Demand) in industrial wastewater. The wastewater is treated sequentially through a water collecting well, a thick grid, a primary settling pond, a pH regulating pond, a nano-microporous ultrasonic batch polymerization tank, a secondary settling pond, an aeration and nitrifying pond, a biological denitrification pond and a tertiary settling pond. By creatively utilizing a synergistic chemical effect of ultrasonic waves at specific frequency, C-H bond breakage and quick recombination in organic matters in the wastewater under the condition can occur on surfaces of nano-microporous membrane materials, and thus polymerization occurs on surfaces of nano-microporous surface polymers, molecular weight of organic matter polymers can be enabled to be continuously increased when an ultrasonic catalytic reaction and agitation occur intermittently and alternately, and large-particle insoluble matters are gradually formed, fall off from the surfaces of the nano-microporous membrane materials, are dispersed in the wastewater in a suspension manner, and finally are removed through settlement.

Description

technical field [0001] The invention relates to a treatment method for removing COD in industrial wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] COD (ChemicalOxygenDemand) is a chemical method to measure the amount of reducing substances that need to be oxidized in water samples. The oxygen equivalent of substances (generally organic matter) that can be oxidized by strong oxidants in wastewater, wastewater treatment plant effluent and polluted water. Therefore, chemical oxygen demand is usually used as an index to measure the content of organic substances in water. The greater the chemical oxygen demand, the more serious the pollution of the water body by organic substances. In the study of river pollution and industrial wastewater properties and the operation and management of wastewater treatment plants, it is an important and quickly measured organic pollution parameter, and it is also one of the ...

AI Technical Summary

Problems solved by technology

[0005] (1) The advantages of chemical treatment of COD are low equipment cost, good treatment effect, and simple operation; the disadvantage is that chemical agents need to be continuously injected into the wastewater, and its operating cost is high. It is often used to treat wastewater with complex components

[0006] (2) The advantages of biochemical treatment of COD are high efficiency in removing dissolved or colloidal organic matter, good effluent quality, and good sludge settling performance; the disadvantage is that operation and management are more complicated, sludge swelling will occur, and the quality of raw water will be affected. High requirements, poor environmental temperature adaptability, large footprint, etc.

[0007] (3) The advantages of physical and chemical treatment of COD are good treatment effect and strong adaptability, but the cost of equipment is high, the operation is complicated, and the requirements for operators are high

Images