METHOD FOR TREATING TOTAL NITROGEN IN WASTEWATER IN COAL CHEMICAL INDUSTRY BY USING MICROBES

摘要

A method for treating total nitrogen in wastewater in coal chemical industry by using microbes, which is characterized in that the waste water(A) sequentially passes through a first aerobic tank, a first sedimentation tank, a facultative tank, a second aerobic tank and a second sedimentation tank to be subjected to two-stage biochemical treatment; microbial flora and microbial carriers are added into the first aerobic tank,the facultative tank and the second aerobic tank; before entering into the first aerobic tank,the waste water passes through an Anammox tank, in which anammox bacterias and carrier activated carbon are added, and an aeration device and a mixing device are also arranged. The method is concise in technological process, since the Anammox tank is adopted in the first stage of the method, different operation modes can be adopted according to different water qualities, thereby reducing the construction cost, improving the treatment capacity, and achieving an effect of energy conservation and consumption reduction. Because the total nitrogen is removed through two-stage A/O and anaerobic ammonia oxidation, the total nitrogen removal effect is obviously better than that achieved in the existing A/O process.