Impact of Water Circulation on Catalytic Oxidation of Ammonia Nitrogen and Manganese by Composite Manganese Oxide
In the process of removing ammonia nitrogen and manganese from groundwater by forming composite manganese oxides,the non-circulating system was replaced with the circulating water regular renewal system and continuous renewal system,to address the significant water demand and high production costs associated with generating composite manganese oxides in non-circulating system.This study compared the efficacy of composite manganese oxides in removing ammonia nitrogen and manganese in both circulating and non-circulating systems,as well as the dynamics of oxide film growth.The circulating water regular renewal system exhibited the highest capacity for manganese removal,while all three systems demonstrated effective ammonia nitrogen removal capabilities.An adaptation period occurred when ammonia nitrogen and manganese was removed by the mature filter media in the circulating water renewal system.During the stages of adding potassium permanganate and removing ammonia nitrogen and manganese with mature filter media,the oxide film load on filter media of the circulating water regular renewal system exhibited the most rapid increase.
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