Wastewater treatment device and method for improving ozone utilization rate in wastewater treatment

Abstract

The invention provides a wastewater treatment device and a method for improving the ozone utilization rate in wastewater treatment. The wastewater treatment device comprises a reactor and a reverse circulation system, wherein the reactor comprises a reactor body, a separation net and an aeration device, and the gas inlet and the gas outlet of the reverse circulation system are both in fluid connection with the reaction cavity of the reactor. According to the wastewater treatment device and the method for increasing the ozone utilization rate in wastewater treatment, ozone bubbles are divided into small ozone bubbles, and the rising speed of the ozone bubbles in the reactor is reduced, so that the contact time of the ozone bubbles and the reaction liquid in the reactor can be prolonged so as to increase the ozone utilization rate.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a waste water treatment device and a method for improving the utilization rate of ozone in waste water treatment. Background technique [0002] Ozone oxidation is a technology commonly used in the field of sewage treatment. Due to its strong oxidizing properties, ozone can rapidly oxidize and remove many organic pollutants in water. Ozone oxidation is mostly used as an advanced treatment process to remove the chemical oxygen demand and chroma that are difficult to degrade in the biochemical secondary effluent. The treatment effect of the ozone process is not only related to the water quality, but also closely related to the process conditions of the treatment process. [0003] At present, most of the wastewater treatment devices involving the ozone process focus on the structural improvement of the reactor. For example, improve the layout of the aeration tray to incre...

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Problems solved by technology

However, this method increases the height of the device, and the installation, movement and maintenance of the device are greatly affected, and the indoor environment may not have enough space to apply a taller reactor

[0005] There are also some wastewater treatment devices that consider using the diffuser plate to cut the ozone gas into smaller bubbles, and at the same time use the plate body to slow down the rise of the ozone bubbles, thereby increasing the time for the ozone bubbles to escape the water body, prolonging the reaction time between the ozone and the water body, and improving the utilization rate , but this method may cause the generated filter residue to be unable to discharge the reactor in time, block the diffusion plate, and cause the internal pressure of the reactor to increase, resulting in damage to the internal structure of the reactor, and the cleaning of the diffusion plate is also inconvenient

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