Optimization of nitrogen removal for alternating intermittent aeration-type activated sludge system: A new process modification


İnsel H. G. , Sozen S., Basak S. , Orhon D.

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, vol.41, no.9, pp.1819-1829, 2006 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 9
  • Publication Date: 2006
  • Doi Number: 10.1080/10934520600778994
  • Title of Journal : JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
  • Page Numbers: pp.1819-1829
  • Keywords: activated sludge modeling, intermittent aeration, nitrification, denitrification, aerated fraction, cycle time ratio, aeration control

Abstract

A new activated sludge process modification was proposed for intermittent aeration process to achieve more stable nitrogen removal performance. A single completely mixed reactor was divided into two compartments in series and operated in intermittent aeration mode by using activated sludge simulation model. The new configuration provided competetive advantage on nitrification as well as denitrification capacity, compared to the intermittently aerated system with a single reactor. In addition, the dissolved oxygen set-point control during air-on periods was found to be an important parameter in terms of nitrogen removal.