METHOD FOR TREATING NON-BIODEGRADABLE WASTEWATER

摘要

PURPOSE: Disclosed is a method for treating non-biodegradable wastewater using electrolysis. According to the method, the method is composed of three steps: first electrolysis - biological treatment - second electrolysis. First electrolysis is operated for transforming non-biodegradable organics into biodegradable organics. And biodegradable organics and nitrogen are removed by biological treatment. Second electrolysis is adopted for removing remaining non-biodegradable organics. CONSTITUTION: Used anode in electrolysis is insoluble electrode made of iridium being titanium-electrodeposited. The anode is shaped like net and cathode used in electrolysis is steel shaped net. Proper interval distance of anode and cathode is 10 mm. The biological treatment is composed of follow steps: anoxic tank - aeration tank . Nitrate nitrogen is removed in the anoxic tank by denitrification. In the aeration tank ammonia nitrogen is transformed into nitrate nitrogen, and organics are decomposed.