Ammonium thiosulfate wastewater treatment method

Abstract

The invention belongs to the field of wastewater treatment, and particularly relates to an ammonium thiosulfate wastewater treatment method which comprises the following steps: evaporating ammonium thiosulfate wastewater through MVR to obtain high TOC ammonium thiosulfate mother liquor; oxidizing the mother liquor and an oxidizing agent; filtering the oxidized wastewater, and analyzing the composition of solid residues; the sulfur content of solid residues is higher than 95%, and the solid residues can be directly put into a production process as sulfur for recycling; adsorbing the oxidized and filtered wastewater through macroporous resin; merging the mother liquor adsorbed by the macroporous resin into raw water, and enabling the raw water to enter an MVR evaporation system, so as to obtain industrial salt and production reuse water. According to the treatment process, the whole process treatment process is complete, all wastes are effectively treated, the treatment cost is low, theprocess risk is low, and the treatment process is a treatment scheme for effectively treating the ammonium thiosulfate wastewater.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a method for treating ammonium thiosulfate waste water. Background technique [0002] The production process of rubber accelerator DPG (hereinafter referred to as DPG) produces a large amount of ammonium thiosulfate wastewater. The current treatment options for this wastewater are as follows: [0003] 1) After adjusting the pH value and filtering, enter the evaporation link (MVR, multi-effect) to obtain high TOC ammonium thiosulfate mother liquor and production reuse water. The high TOC ammonium thiosulfate mother liquor is evaporated to dryness to obtain ammonium thiosulfate waste salt. [0004] 2) Use a large proportion of lime ferrous sulfate for coagulation, aeration and sedimentation, then filter, and enter the evaporation link (MVR, multi-effect) at night to obtain mother liquor and production reuse water. . [0005] 3) Ammonium thiosulfate is added to the...

AI Technical Summary

Problems solved by technology

[0010] For scheme 4) wet oxidation process, this process has low energy consumption for wastewater treatment, can balance heating energy consumption during the organic matter oxidation process, and can achieve complete harmless treatment of wastewater and salt. It operates under ultra-high temperature and high pressure, which poses a high safety risk

[0011] In summary, the traditional ammonium thiosulfate wastewater treatment process has obvious defects in terms of product yield device investment, maintenance costs, process integrity, and post-treatment. In the actual treatment process, the safety risk is large. high investment costs