The German design guideline A 131 “Design of single stage activated sludge plants” was amended in 1999. The main changes of the guideline from 1991 are outlined. The design procedure for plants with nitrogen and phosphorus removal is presented.

Activated sludge process, nitrogen removal, phosphorus removal, wastewater treatment
This content is only available as a PDF.
© IWA Publishing 2000
You do not currently have access to this content.