A method for phosphorous and nitrogen removal with sludge disintegration in advanced wastewater treatment process

摘要

The present invention relates to a method for reducing sludge and removing phosphorus and nitrogen in an advanced sewage and wastewater treatment process. More specifically, in an advanced sewage and wastewater treatment process having an anaerobic tank 1 capable of releasing phosphorus, the anaerobic tank 1 (A) transferring the activated sludge mixed liquid in which phosphorus is released into the phosphorus separator 5 into a supernatant liquid having high phosphorus concentration and activated sludge; The supernatant with high phosphorus concentration separated in the phosphorus separator 5 of step (a) is transferred to the chemical phosphorus remover 6, and the high concentration of phosphorus is selectively removed using a flocculant, and the supernatant from which phosphorus is removed is again anaerobic tanked. (2) or (b) conveying to an aerobic tank 3; And discharging the activated sludge separated in the phosphorus separator 5 of step (a) to the sludge digestion tank 7 and returning the decomposed sludge to the anaerobic tank 1 or to the anaerobic tank 2. And returning (c) the carbon source for release and denitrification of phosphorus.;By using the above method according to the present invention, the sludge decomposed by physical and chemical methods including ozone is reused as a carbon source for additional phosphorus release and denitrification, thereby improving phosphorus and nitrogen removal efficiency by increasing phosphorus release and denitrification efficiency. In this way, by reusing the sludge in the treatment process, the production of surplus sludge is drastically reduced, and the discharge of sludge necessary for phosphorus removal is minimized through the selective separation discharge of high concentration of phosphorus to reduce the sludge discharged and the cost of sludge treatment. There is an effect to reduce the.;In addition, SBR (Sequencing Batch Reactor) or continuous inflow intermittent time divided into anaerobic period (9), aerobic period (10), anaerobic period (11), sedimentation period (12) and effluent period (13). The same effect can be obtained by applying to the advanced sewage and wastewater treatment process using the discharge type reaction tank.;Advanced sewage and wastewater treatment process, sludge, weight reduction, phosphorus, nitrogen, chemical phosphorus removal, phosphorus, emission, denitrification, carbon source.