Cyanogen removal nitrogen reduction decolorizing agent suitable for coking phenol cyanogen wastewater and preparation and use methods
A technology for decolorizing agent and cyanide wastewater, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of high cost of phenolic cyanide wastewater, low ammonia nitrogen removal rate, unsatisfactory removal, etc., and is not easy to decompose. , Simple operation, good synergy effect
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[0055] Example 1
[0056] The pH of the biochemical effluent of the coking phenol-cyanide wastewater is 7.47, the total cyanide is 5.20mg / L, the COD is 210mg / L, the ammonia nitrogen is 27mg / L, and the color is 300 times. Add cyanide removal and nitrogen reduction decolorant a to the phenol cyanide wastewater with a dosage of 884mg / L, stir for 10-15 seconds and then stand for 20 minutes to determine various pollutant indicators in the supernatant, and the total cyanide is <0.1mg / L, COD 59mg / L, ammonia nitrogen 8mg / L, chroma is less than 30 times.
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[0057] Example 2
[0058] Take the biochemical effluent from the coking phenol-cyanide wastewater, and the indicators are as follows: pH 8.15, total cyanide 9.5mg / L, COD 350mg / L, ammonia nitrogen 57mg / L, color 500 times. Add the cyanide-removing and nitrogen-reducing decoloring agent b to the phenol-cyanide wastewater with a dosage of 1615mg / L, stir for 10-15 seconds and then stand for 20 minutes to determine various pollutant indicators in the supernatant, and the total cyanide is <0.1mg / L, COD65mg / L, ammonia nitrogen 9mg / L, chroma is less than 30 times.
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[0059] Example 3
[0060] Take the biochemical effluent water of coking phenol cyanide wastewater, and the indicators are as follows: pH 7.94, total cyanide 14mg / L, COD 570mg / L, ammonia nitrogen 62mg / L, color 900 times. Add cyanide-removing and nitrogen-reducing decoloring agent c to the phenol-cyanide wastewater with a dosage of 2490mg / L, stir for 10-15 seconds and then stand for 20 minutes to determine various pollutant indicators in the supernatant, and obtain total cyanide <0.1mg / L, COD 60mg / L, ammonia nitrogen 8.9mg / L, chroma is less than 30 times.
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