Modification of Activated Sludge Model no. 3 considering direct growth on primary substrate

Karahan-Gul Ö., van Loosdrecht M., Orhon D.

WATER SCIENCE AND TECHNOLOGY, vol.47, no.11, pp.219-225, 2003 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 47 Issue: 11
  • Publication Date: 2003
  • Doi Number: 10.2166/wst.2003.0608
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.219-225
  • Keywords: Activated Sludge Model No. 3 (ASM3), modeling, respirometry, STORAGE POLYMERS, METABOLISM
  • Istanbul Technical University Affiliated: Yes


This paper provides the structural framework for the proposed modified version of Activated Sludge Model No. 3 (ASM3), where direct heterotrophic growth on readily biodegradable substrate is included as a new process and provision is made so that growth on internal storage compounds is started sequentially, after the depletion of the external primary substrate pool. The results have provided strong indication that there was a need for considering direct growth on primary substrate as a significant biological mechanism.