Process for treating high-concentration industrial organic wastewater by composite advanced oxidation method

Abstract

The invention relates to the technical field of industrial wastewater treatment, in particular to a process for treating high-concentration industrial organic wastewater by a composite advanced oxidation method, and a treatment device used by the process comprises a rectangular pool, a hollow pipe, an air pump and a controller. The bottom of the rectangular pool is obliquely arranged, a resistancewire is installed in the bottom of the rectangular pool, and one side wall of the rectangular pool communicates with a water outlet pipe. According to the treatment device used in the process for treating the high-concentration industrial organic wastewater through the composite advanced oxidation method, a motor drives the hollow pipe to slide along a sliding rod, and an electric push rod drivesthe hollow pipe to move up and down, so that the contact area between ozone discharged by the hollow pipe and the wastewater in the rectangular pool is increased, and thus the treatment efficiency ofthe high-concentration industrial organic wastewater is improved. The ozone drives the wastewater to roll over, an intermediate product generated by ozone decomposition is prevented from stopping theoxidation process of the ozone, and then the ozone is matched with the resistance wire to heat the wastewater, so that the efficiency of removing organic matter in the wastewater by ultrasonic wavesis improved.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a process for treating high-concentration industrial organic wastewater by a composite advanced oxidation method. Background technique [0002] The development of modern industry, especially the pharmaceutical industry, textile industry, metallurgy industry, electronics, electroplating and petrochemical enterprises, etc., has increased the industrial wastewater containing refractory organic pollution; the organic matter in organic wastewater is due to its stable structure, poor biodegradability and toxicity Strong and other special effects are difficult to solve by conventional physical, chemical, and biological methods; advanced oxidation methods have overcome the shortcomings of ordinary oxidation methods such as weak oxidation ability and selectivity, and have attracted more and more attention due to their unique advantages; currently commonly used advan...

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Problems solved by technology

[0002] The development of modern industry, especially the pharmaceutical industry, textile industry, metallurgy industry, electronics, electroplating and petrochemical enterprises, etc., has increased the industrial wastewater containing refractory organic pollution; the organic matter in organic wastewater is due to its stable structure, poor biodegradability and toxicity Strong and other special effects are difficult to solve by conventional physical, chemical, and biological methods; advanced oxidation methods have overcome the shortcomings of ordinary oxidation methods such as weak oxidation ability and selectivity, and have attracted more and more attention due to their unique advantages; currently commonly used advanced oxidation methods Oxidation technologies mainly include photochemical oxidation, catalytic wet oxidation, sonochemical oxidation, ozone oxidation, electrochemical oxidation, Fenton oxidation and Fenton-like method; however, a large number of applied research also shows that the oxidation rate of a single oxidation technology means Neither the efficiency nor the efficiency can meet the requirements of degrading organic matter; for this reason, in recent years, related combination technologies to improve oxidation efficiency have been developed; various joint advanced oxidation methods have certain synergies and respective advantages in the treatment of refractory organic wastewater, and at the same time It can improve the treatment efficiency and effect of high-concentration industrial organic wastewater to a certain extent.

[0003] In the prior art, there are also some technical solutions about the process of treating high-concentration industrial organic wastewater by composite advanced oxidation method. For example, a Chinese patent with application number CN201110122528.2 discloses a process for treating high-concentration industrial organic wastewater by composite advanced oxidation method , comprising the following steps: passing the pretreated organic wastewater into the composite advanced oxidation device, controlling the current density of the composite advanced oxidation device to be 10-20mA / cm2, and controlling the residence time of the pretreated water in the first reaction zone to be 0.5 ~2 hours, the residence time of the pretreated water in the second reaction zone is controlled at 0.5~1 hour; this technical scheme combines the advantages of ultrasonic, ozone, iron-carbon micro-electrolysis and electrocatalytic oxidation, and makes them have a synergistic effect , which not only improves the efficiency and treatment effect of sewage treatment but also reduces the cost of sewage treatment; however, the intermediate products generated by the decomposition of the ozone oxidation method in the wastewater in this technical solution will prevent the oxidation process of ozone, thus resulting in the efficiency of the wastewater treatment process low, which in turn caused the limitations of the technical solution

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