交替活性污泥工艺发展类型及研究方向

交替活性污泥工艺是在一个反应器或一组反应器中通过时间或空间的交替实现对污水的处理。从最初的SBR到各种改良形式,交替活性污泥工艺在控制系统、运行方式等方面迅速发展。传统的交替工艺只能适用于中小型污水处理,CAST、MSBR、UNITANK、多箱一体化工艺等通过运行方式组合,既提高了对处理规模的适应性,又能满足除磷脱氮要求。交替活性污泥工艺今后研究的重点是工艺组合优化,提高灵活性,特别是如何在单泥交替系统中解决除磷脱氮的矛盾,同时也要注意相应配套设备的开发,降低造价,提高可靠性。

Evolution Types and Research Directions of Alternating Activated Sludge Process

Alternating activated sludge process completes the treatment in a single reactor or a group of reactors by time and spatial alternation.From the early SBR to the later modified forms,alternating activated sludge process has made rapid progress in control system,running mode and so on.Traditional alternating process can only suit medium-sized and small wastewater treatment while such processes as CAST,MSBR,UNITANK,and the integrated system with several tanks not only can meet the requirements of dephosphorization and denitrification but also can suit the larger-scale wastewater treatment.Future research emphasis of alternating activated sludge process should be laid on the optimization of process combination to enhance the flexibility,especially to solve the contradiction of dephosphorization and denitrification in the single sludge alternating system.Simultaneously,corresponding equipment should be developed to decrease the cost and improve the reliability.