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

A microbial electrode and microbial electrochemistry technology, which is applied in the field of anaerobic degradation and transformation of azo dyes based on microbial electrode respiration enhancement, can solve the problems of obvious treatment effect of easily degradable organic matter, long start-up period and low decolorization rate, and achieves the distribution of microbial populations. Reasonable, good hydraulic conditions, and enhanced biodegradation effect

Inactive Publication Date: 2015-08-19
GUANGDONG INST OF MICROORGANISM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 t

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The artificially prepared nutrient solution is used as the influent, and the composition of 1L influent nutrient solution is:

[0032] 0.393g CH3COONa, 0.407g NH4Cl, 0.600g Na2HPO4, 0.300gKH2PO4, 0.500g NaCl, 0.100g MgSO4 7H2O, 0.015g CaCl2 7H2O, the azo dye is Orange II (acid orange 7).

[0033] In the first 27 days, the acid orange 7 concentration in the influent water was 200 mg / L.

[0034] The microbial electrochemical system is placed in an anaerobic reactor to form a coupled reactor, such as figure 1 shown.

[0035] Then inoculate anaerobic sludge at a room temperature not higher than 35°C, adjust the pH value to 7-8, the hydraulic retention time to 1-3 days, the concentration of influent azo dyes to 200-800mg / L, and the influent COD concentration to 500- After 800 mg / L, the azo dye wastewater is filtered through a sieve with a diameter of 0.15 mm in turn, precipitated in the primary sedimentation adjustment tank, and enters the coupling reactor through the acti...

Embodiment 2

[0039] The nutrient solution is artificially configured as water intake, and the method is the same as in Example 1.

[0040] The acid orange 7 concentration in the influent water was 400mg / L on the 28th-60th day.

[0041] The microbial electrochemical system is placed in an anaerobic reactor to form a coupled reactor, such as figure 1 shown.

[0042]Then inoculate anaerobic sludge at a room temperature not higher than 35°C, adjust the pH value to 7-8, the hydraulic retention time to 1-3 days, the concentration of azo dyes in the influent to 200-800mg / L, and the influent COD concentration to 700- After 1000mg / L, the azo dye wastewater is filtered through a screen with a hole diameter of 1.0mm, precipitated in the primary sedimentation adjustment tank, and enters the coupling reactor through the action of a peristaltic pump. In the coupling reactor, the azo dye wastewater is drained The decolorization is obvious after the initial degradation of the oxygen reactor; at the same...

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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...

Claims

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Application Information

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IPC IPC(8): C02F3/28
Inventor 许玫英罗鸥杨永刚钟玉鸣
Owner GUANGDONG INST OF MICROORGANISM
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