Device and method for treating high-concentration dye wastewater

Abstract

The invention discloses a device and method for treating high-concentration dye wastewater. The device comprises a pH adjusting tank; a coagulation sedimentation, wherein a water inlet end of the coagulation sedimentation tank is connected with a water outlet end of the pH adjusting tank; a main reaction tank, wherein a water inlet end of the main reaction tank is connected with a water outlet endof the coagulation sedimentation tank; an oil-free air compressor; an adsorption dryer, wherein an air inlet end of the adsorption dryer is connected with an air outlet end of the oil-free air compressor; an ozone generator, wherein an air inlet end of the ozone generator is connected with an air outlet end of the adsorption dryer, and an air outlet end of the ozone generator is connected with anaeration pipe at the bottom of the main reaction tank through a pipeline. The device adopts a microelectrolysis-ozone-ultrasonic wave system, and the utilization rate of ozone can reach more than 95%through the synergistic effect of an iron-carbon filler and ultrasonic wave and the cyclic utilization of ozone tail gas. The device has the advantages of compact structure, high space utilization rate, good economy, high treatment efficiency and the like, and can be used for treating high-concentration dye wastewater.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and mainly relates to a device and a treatment method for treating high-concentration dye wastewater, and is used for treating high-concentration dye wastewater. Background technique [0002] The dye industry in our country has the characteristics of small batches and multiple varieties. Most of them are intermittent operations. The wastewater is discharged intermittently. The water quality and quantity vary widely. In the dye production process, such as sulfonation, nitrification, diazotization, reduction, oxidation and acid A lot of pollutants are produced in processes such as (salt) precipitation. As a result, these printing and dyeing wastewater have the characteristics of high pollutant concentration, complex wastewater composition, large amounts of organic matter and salt, high COD, deep color, strong acidity and alkalinity, poor biodegradability and strong toxicity. [0003] Most of the...

AI Technical Summary

Problems solved by technology

Ozone oxidation is selective, and the oxidation efficiency is not high when used alone, but ozone is unstable in water, and it will generate monatomic oxygen and hydroxyl with strong oxidation ability, etc. Hydroxyl radicals can trigger a series of free radical chain reactions in water. Sexual degradation, mineralization of various organic substances in water

In addition, there are problems such as high ozone dosage, large floor area, and high investment and operation costs when used alone.

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