A Mixing Methods of Reactor using stream of Sludge Recycle and Mixed Liquor Recycle with Pre-Denitrification

摘要

PURPOSE: Mixing method of reactor using flow of recycle sludge and internal circulation flow is provided, which is characterized in that mixing of reactor is operated by flow of recycle sludge and internal circulation flow. Therefore mixing cost is reduced. The method is applicable to a sewage/wastewater treatment process using pre-denitrification. CONSTITUTION: According to the method, a recycle pipe(9) is equipped with the aerobic and anoxic tanks(1,2) for recycle of wastewater. And an ejector(7) is installed at the end of the recycle pipe(9) in the anoxic tank(2). Wastewater of the anoxic tank(1) is inhaled into the ejector(7), and discharged through an outlet of the ejector(7) with recycled wastewater from the aerobic tank(2). Therefore mixing of interior of the anoxic tank(1) and recycle are operated in parallel. Optionally exterior carbon source for denitrification is injected into the anoxic tank(1) through the ejector(7).