A kind of advanced oxidation of persulfate coupled with biological sulfate reduction treatment method of wastewater

Abstract

The invention discloses a method for treating waste water with persulfate advanced oxidation coupled with biological sulfate reduction, which comprises the following steps: 1) in a reactor 1, organic waste water, an iron-based catalyst and persulfate are mixed to perform advanced oxidation reaction; 2) Add the effluent of step 1) and the used iron-based catalyst into the reactor 2 containing sulfate-reducing bacteria, and mix it with an organic carbon source to carry out the sulfate reduction reaction; 3) The sulfate reduction reaction in the reactor 2 produces The sulfide is subjected to a reduction reaction with the iron-based catalyst used in step 1) to obtain a regenerated iron-based catalyst; then the regenerated iron-based catalyst is magnetically separated and returned to the reactor 1 for recycling. The invention realizes catalytic-biochemical coupling treatment of refractory organic wastewater, regeneration and recycling of catalysts, increases recycling efficiency of catalysts, reduces costs, reduces biological toxicity of advanced oxidation intermediates, improves effluent quality, and reduces environmental risks.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for treating wastewater by coupling advanced persulfate oxidation with biological sulfate reduction. Background technique [0002] With the rapid development of my country's social economy, the degree of industrialization is changing with each passing day, and the production of various types of refractory organic wastewater is increasing day by day. Using low-cost and high-efficiency treatment methods to treat refractory organic wastewater is a difficult and hot topic in recent years. Refractory organic wastewater refers to organic pollutants that contain low biodegradability, refractory biodegradation, and difficult to completely decompose in wastewater. These refractory organic pollutants mainly include dyes, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, phenols, and aniline. Classes and nitrobenzenes, pesticides and so on. Refracto...

AI Technical Summary

Problems solved by technology

However, the former has the problem of increased energy costs, while the latter also introduces reducing agents, increasing the risk of secondary pollution

Although advanced oxidation technology overcomes many shortcomings of biological methods and physicochemical methods, it can effectively remove refractory organic matter, but it is difficult to achieve complete mineralization, and even produces more toxic intermediate products

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