Modeling and control of activated sludge nitrogen removal processes
活性污泥脱氮过程的建模与控制

To clean wastewater,many methods including systematic process development and implementation of more instruments,automatic control systems have been addressed.This work reviews the new developments in the field of modeling and control of biological wastewater treatment plants for nitrogen removal.Modeling for activated sludge reactors,biofilms and the anaerobic digestion and some recent achievements of Benchmark based simulations are discussed.It is emphasized that aeration,sludge retention time and external carbon addition have been identified as effective control methods.Some research challenges such as integration of process design and control,the integrated urban wastewater system and application of novel analytical and investigative methods are presented.