Function:This process removes COD, BOD, nitrifies, denitrifies, removes phosphorus, and eliminates harmful substances (AOX). Features:1.Uses efficient microorganisms for fast organic degradation and effective ammonia nitrogen removal.2. High biomass, fast reaction, and high-quality effluent.3.Low operating costs and small footprint.4.Simultaneous aerobic and anaerobic reactions remove ammonia nitrogen and total nitrogen.Construction:The aerated biological filter can be circular or rectangular, with bottom aeration. It includes a tank, water/air distribution device, backwash system, and microbial carrier (filter material).Design Selection:Adopts denitrification and nitrification filters, using ceramic particles as filter material for cost-effective treatment.