Process for intensifying anaerobic degradation and transformation of azo dyes based on breath of microbial electrode

Abstract

The invention discloses a process for intensifying anaerobic degradation and transformation of azo dyes based on breath of a microbial electrode. The process comprises the following steps: putting a microbial electrochemical system in an anaerobic reactor to form a coupling reactor; inoculating anaerobic sludge under the room temperature condition; after adjusting the pH value of the azo dye wastewater, the hydraulic retention time, the inflow COD concentration and the inflow azo dye concentration, filtering the azo dye wastewater and carrying out precipitating; feeding the wastewater to the coupling reactor by the action of a peristaltic pump; while decoloring being obvious after initial degradation by the anaerobic reactor in the coupling reactor, treating the wastewater by the microbial electrochemical system; and finally discharging the azo dye wastewater through a secondary sedimentation tank. The key point of the invention lies in that an efficient anaerobic reactor for intensifying biodegradation of the azo dyes based on breath of the microbial electrode is constructed;the addition of chemical agents is reduced; the consumption of electric energy is reduced; and the electric energy is recovered while the pollutants are degraded, so that the cost for treating the azo dye wastewater is effectively lowered.

Description

Technical field: [0001] The invention belongs to the field of azo dye wastewater degradation, and in particular relates to a process for strengthening the anaerobic degradation transformation of azo dye based on microbial electrode respiration. Background technique: [0002] Printing and dyeing wastewater containing azo dyes has high chroma, high turbidity, high concentration of organic matter, and complex water quality components. Direct discharge into water bodies will affect the transmission of light and the reduction of dissolved oxygen in water bodies, which will affect the normal survival and growth of aquatic organisms. In addition, due to the presence of N=N double bonds in the molecular structure of azo dyes, the molecule is stable and difficult to be degraded by microorganisms, and the primary metabolites of its degradation metabolism are aromatic amines, which are potentially toxic and carcinogenic, which are harmful to aquatic organisms, the ecological environment...

AI Technical Summary

Problems solved by technology

[0003] Traditional physical and chemical methods either have high energy consumption, high drug consumption, or large secondary pollution, difficult post-processing, and are easily interfered by complex components, while conventional biological treatment has a long start-up period and low decolorization rate. unsatisfactory effect

However, conventional biological treatment methods have obvious effects on the treatment of easily degradable organic matter, and the energy consumption is low

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