Contain The Technique Research Of The Cyanotype Waste Water Depth Processing

This issue is c proposed closely integrated with the actual status of cyanide wastewater treatment, involving cyanide wastewater quality improvements and several new advanced treatment process. This paper through doing these experiments, to optimize the water quality, and determine three different combination processes on the depth treatment effect of cyanide wastewater, to make a guidance for the acrylic fiber wastewater treatment.Under the understanding of wastewater containing cyanide, we see clearly in Acrylic Fiber Waste as contained in the main raw organic material for the production are acrylonitrile, ethyl mercaptan, C mercaptan, methyl acrylate, methyl acrylic acid Sodium five substances, but also a small amount of succinonitrile, E nitrile, acetonitrile,β,β'-iminodipropionitrile , o-xylene, thio-o-aminophenol and other components. Among them, the organic nitrile (acrylonitrile, succinonitrile, E nitrile, acetonitrile,β,β'-iminodipropionitrile),thiols (ethanethiol, C mercaptan),thio-o-aminophenol,o-xylene are biodegradable; Methyl acrylate,methyl acrylic sodium are un-biodegradable, after the conventional secondary biological treatment, the COD removal rate reached only about 50%, which is difficult to meet the national emission standards. Choosing Daqing Acrylic Fiber wastewater treatment plant for example, contains the above mentioned components of industrial waste water by flotation - Hydrolysis - Pure Oxygen Aeration - oxidation - after sedimentation processes, can be degraded to varying degrees, but the effluent COD is between 220 and 400mg / L, still exceeds the national discharge standard.In this study, the contain cyanotype wastewater by biodegradation experiment to test the possibility of its biochemical treatment, and mixed with other waste water treatment to improve the degree of biodegradability, and through comparing the test, we chose the method of chemical coagulation + ozonation + contact oxidation combined process, fluidized bed Fenton + contact oxidation processes, ozonation + aerated biological activated carbon filters combined process. These three combined technology of contain cyanotype wastewater pilot experiments, various combinations by continuous monitoring process average daily water target, to identify treatment effect trend, results show that ozone + aerated biological activated carbon filter more effective in reducing the combined process of acrylic wastewater CODcr and NH3-N content, acrylic effluent, the effluent COD in the 150 mg / L, the removal rate of 60%; effluent NH3-N is usually in the 20 mg / L or so, the removal rate has reached 50%, which is considered bringing huge economic and environmental benefits. Experiments show that the ozone oxidation and biological aerated activated carbon filter combined process for cyanide wastewater treatment has a good result.