Standard ATV-DVWK-A 131E Dimensioning of Single-Stage activated Sludge Plants

At the time of elaborating the previous issue of this ATV Standard (1988-90) there were only isolated activated sludge plants with nitrogen and phosphorus removal, from whose operating results information could be deduced for dimensioning and operation. Therefore, with many questions, one had to rely exclusively on the results of research. In the meantime, a large number of such facilities have been commissioned so that a wider database, also from practice, is available for a revision.