Method for processing azo dye wastewater by employing biological electrochemical system
A technology of bioelectrochemistry and azo dyes, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as long time consumption and poor adaptability to incoming water quality , to achieve low energy consumption, shorten start-up time, and protect the environment
Inactive Publication Date: 2015-02-25
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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Commonly used biological treatment methods mainly include aerobic treatment, anaerobic treatment and anaerobic-aerobic treatment, but biological treatment takes a long time and is not very adaptable to incoming water quality
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[0015] Put the pre-enriched electrochemically active bacteria with high efficiency in degrading methyl orange into the anode chamber on the carbon felt, use 500mg / L and 0.36 glucose as the co-substrate, and remove the methyl orange to colorless in the anode Finally, open the valve to lead the treated water in the anode chamber to the cathode chamber, and use the bacillus in the cathode chamber to continue to treat the wastewater in the anode chamber to non-toxic small molecular substances. The initial pH of the anode feed water is 9, after 72 hours in the anode chamber, the decolorization rate can reach 95% ( figure 2 As shown), the COD removal rate is 20%. After 48 hours of treatment in the cathode chamber, the COD removal rate reaches 56%, and the pH of the effluent is 6.5. The effluent is detected as a non-toxic small molecule substance by full spectrum and liquid chromatography ( image 3 shown). The control group used the same device but the anode and cathode were not c...
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Abstract
The invention relates to an azo dye wastewater processing method, particularly relates to a processing method for removing azo dye wastewater and decolorizing and degrading dye molecules by virtue of a biological electrochemical system, and belongs to the field of environmental protection. The specific method is as follows: the biological electrochemical system device comprises the following elements shown in the figure 1: an anode chamber 1, an anode water inlet pipe 2, a resistor 3, a cathode water outlet pipe 4, a cathode chamber 5, a carbon felt 6, a partition membrane 7, a water delivery pipe 8 and a valve, wherein the water delivery pipe is connected between the anode chamber and the cathode chamber; the anode chamber is used for inoculating active sludge; azo dyes represented by methyl orange and glucose are taken as nutrient sources, and electrochemical active cultures capable of efficiently degrading methyl orange are enriched on an electrode material; a cathode is an aerobic biocathode; the cathode is connected with an anode to form the biological electrochemical system through a lead; the methyl orange is decolorized in the anode chamber; and then effluent is accessed into the cathode chamber, and is completely degraded under catalysis of bacillus. The method disclosed by the invention has the advantages of good treatment effect, no secondary pollution, low energy consumption and low water treatment cost.
Description
technical field [0001] The invention relates to a treatment method for azo dye wastewater, in particular to a treatment method for removing azo dye-containing wastewater and decolorizing and degrading dye molecules by using a bioelectrochemical system, which belongs to the background technology in the field of environmental protection. Background technique [0002] In 2010, my country's dyestuff output reached 756,000 tons, accounting for 60% of the world's total dyestuff output, ranking first in the world. At the same time, the dye industry is also a high energy consumption and high pollution industry. Azo dyes are the most widely used synthetic dyes in various industries, accounting for 80% of the total organic dye products. They are synthesized by aromatic amines through organic reactions, so azo dyes and their metabolites have strong biological toxicity , Under special circumstances, it can be decomposed to produce more than 20 kinds of carcinogenic aromatic amines, whi...
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IPC IPC(8): C02F3/34
Inventor 陈立香赵峰郑琦
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI