BIOLOGICAL/CHEMICAL ADVANCED WASTEWATER TREATMENT

摘要

PURPOSE: A biological/chemical advanced wastewater treatment is provided, which is characterized in that raising of sludge is controlled in the sedimentation tank (5) and nitrogen and phosphorus are removed effectively. CONSTITUTION: The treatment comprises follow parts of: a settling tank (1) for separating sand and debris in wastewater; an anaerobic tank (2) for denitrification of returned sludge which is nitrified in simple and contact aeration tanks (3) (4); a biopond (6) equipped with a biomake and an aeration device for activating microorganisms and supplying activated microorganisms into the simple and contact aeration tanks (3) (4); the simple aeration tank (3) for decomposing organics and for converting ammonia (NH4) to nitrite (NO3); the contact aeration tank (4) for decomposing residual organics and for converting residual ammonia (NH4) to nitrite (NO3) by microorganisms attached to media (11); a sedimentation tank (5) for settling sludge and for removing residual phosphorus by using coagulation.