Wastewater treatment system capable of realizing acid recycling

Abstract

The invention discloses a wastewater treatment system capable of realizing acid recycling. The system comprises a strong-basicity printing and dyeing wastewater treatment system, an odor collection device and a biological packed tower, wherein the strong-basicity printing and dyeing wastewater treatment system comprises a pH regulating tank; the strong-basicity printing and dyeing wastewater treatment system comprises an anaerobic tank; the biological packed tower is used for carrying out biological oxidation treatment on odor generated in the system through a biological oxidation method and oxidizing H2S in the odor into H2SO4; the biological packed tower comprises a first liquid outlet and a liquid accumulation device connected with the first liquid outlet through a first liquid outlet pipe; a second liquid outlet is formed in the liquid accumulation device; and the second liquid outlet is connected with the pH regulating tank through a second liquid outlet pipe. The system disclosedby the invention can effectively recycle acid and recycle sulfur in the sewage treatment system, so capital construction investment can be greatly reduced, resources are saved, and the system is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a waste water treatment system for acid circulation recovery. Background technique [0002] In the existing wastewater treatment, especially the textile printing and dyeing wastewater has the following characteristics: high concentration, most of the wastewater is alkaline, and the COD is high. Especially for the treatment of textile printing and dyeing wastewater with strong alkalinity, it is often necessary to add a large amount of H to the wastewater. 2 SO 4 , leading to an increase in the salinity of the effluent, and at the same time causing the SO in the sludge to 4 2- content increased, causing SO in the waste gas from sludge incineration treatment 2 The increase will increase the cost of flue gas treatment and the pressure to meet the emission standards. Contents of the invention [0003] The present invention aims to provide a waste water treatment s...

AI Technical Summary

Problems solved by technology

Especially for the treatment of textile printing and dyeing wastewater with strong alkalinity, it is often necessary to add a large amount of H to the wastewater. 2 SO 4 , leading to an increase in the salinity of the effluent, and at the same time causing the SO in the sludge to 4 2- content increased, causing SO in the waste gas from sludge incineration treatment 2 Increase, increase the cost of flue gas treatment and the pressure to meet the emission standards

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