ADVANCED WASTE WATER TREATMENT PROCESS BY NOXN REMOVAL FROM RETURN ACTIVATED SLUDGE

摘要

The present invention relates to an improved method for treating sewage and wastewater in which manure and the like are injected for removal of nitrates in a return sludge in wastewater treatment processes such as sewage, livestock wastewater, phosphorus and plant wastewater. The activity of the phosphorus-removing microorganisms is lowered in low concentration sewage, and the complex process is required to increase the activity of the phosphorus-removing microorganisms, and thus, to solve the problems of the prior art, which has a high treatment cost, prior to the return to the anaerobic tank (An). , By mixing manure with return sludge from sedimentation tank (Sed) in an anoxic tank (Axr) to remove nitrates from the return sludge, activating phosphorus removal microorganisms in the wastewater treatment process to greatly enhance the nutrient (nitrogen, phosphorus) removal effect . Simple operation and almost no additional facilities are required, resulting in low operating costs.