A comparison of one- and two-stage activated sludge nitrification units was made by using laboratory-scale activated sludge reactors. Both systems can be operated and controlled to accomplish complete ...

Conventional activated sludge processes may be controlled by sludge recycle rate, waste sludge flow rate, and aeration rate. In a multistage reactor system such as the step-feed process, variations in ...

VACUUM nitration of sewage sludge, particularly surplus activated sludge from the activated sludge process of sewage treatment, is a well-established process, particularly in the United States, for ...