Zero-valent iron reduction-Fenton oxidation integrated reaction device and method for treating nitroaromatic compound wastewater by using zero-valent iron reduction-Fenton oxidation integrated reaction device

Abstract

The invention discloses a zero-valent iron reduction-Fenton oxidation integrated reaction device. The reaction device comprises a reactor body with a hollow cylindrical structure, wherein the inner part of the reactor body is divided into four reaction areas, namely an iron mud collecting area, a zero-valent iron reduction area, a zero-valent iron Fenton oxidation area and a sedimentation area from bottom to top; the four reaction areas are communicated with one another, and iron scraps fills up the zero-valent iron reduction area and the zero-valent iron Fenton oxidation area. According to the zero-valent iron reduction-Fenton oxidation integrated reaction device disclosed by the invention, a zero-valent iron reduction technology and a zero-valent iron Fenton oxidation technology are combined to ensure that the effective space of a reactor can be used to a greatest extent, the technological process of wastewater treatment can be simplified, and the running cost can be reduced; and according to the zero-valent iron reduction-Fenton oxidation integrated reaction device, the zero-valent iron reduction technology and the Fenton oxidation technology are coupled, iron ions produced by a zero-valent iron reduction working section can be fully used in a Fenton oxidation working section as catalysts, and thus the treatment efficiency of the Fenton oxidation working section can be improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a zero-valent iron reduction-Fenton oxidation integrated device and a method for treating nitroaromatic compound wastewater by using the device. Background technique [0002] Zero-valent iron reduction technology and Fenton oxidation technology are two typical chemical wastewater pretreatment technologies, which are often used separately or simultaneously in the design of wastewater treatment processes, which can achieve better treatment effects. When the zero-valent iron reduction technology and the Fenton oxidation technology are used at the same time, the zero-valent iron reduction reaction device and the Fenton oxidation reaction device are usually connected in series to achieve the purpose of reducing the biological toxicity of wastewater and improving the biodegradability of wastewater, thereby creating a new environment for subsequent biochemical proces...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the Fenton section, such as high processing costs and large secondary pollution, severely limit the practical engineering application of the zero-valent iron-Fenton coupling technology.

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