Electrochemical Oxidation Method for Treating High Salt Ammonia Nitrogen Wastewater from Coal-fired Power Plants
In order to improve the treatment rate of high salt ammonia nitrogen wastewater in coal-fired power plants,based on the technical principle of electrochemical oxidation method for treating high salt ammonia nitrogen wastewater,a sample of high salt ammonia nitrogen wastewater from a coal-fired power plant was taken.LHB-2 electrolyte sodium hypochlorite generator was used to electrolyze desulfurization wastewater and fine treat regenerated wastewater.The degradation evaluation of high salt ammonia nitrogen wastewater was carried out through experiments on current density,water temperature,and residence time.The results indicate that the current density,water temperature,residence time,and chloride ion concentration of the electrochemical oxidation method all affect the degradation efficiency of wastewater.At a constant water flow rate,the higher the current density,the greater the concentration of degraded ammonia nitrogen.As the water temperature continues to rise,the concentration of ammonia nitrogen degradation gradually decreases.The longer the retention time of wastewater,the higher the efficiency of removing ammonia nitrogen.When the water temperature is 26℃,the higher the initial concentration of chloride ions,the greater the removal efficiency.Under the conditions of a current density of 240 A/m2,a water temperature of 26℃,a residence time of 2 minutes,and a chloride ion concentration of 9 000 mg/L,the optimal treatment effect of high salt ammonia nitrogen wastewater can be achieved.
electrochemical oxidation methodcoal-fired power plantshigh salt ammonia nitrogen wastewater
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