Phosphate uptake and release rates with different carbon sources in biological nutrient removal using a SBR


Kargi F., Ahmet U. , Baskaya H.

JOURNAL OF ENVIRONMENTAL MANAGEMENT, vol.76, no.1, pp.71-75, 2005 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 1
  • Publication Date: 2005
  • Doi Number: 10.1016/j.jenvman.2005.01.010
  • Title of Journal : JOURNAL OF ENVIRONMENTAL MANAGEMENT
  • Page Numbers: pp.71-75

Abstract

A three-step sequencing batch reactor (SBR) was used for nutrient removal from synthetic wastewater with different glucose-organic acid mixtures (1/1). Acetic. butyric. propionic and citric acids were used as organic acids along with glucose. The operation consisted of anaerobic. anoxic and oxic (An/Ax/Ox) phases with durations of 2/l/4.5 h. Sludge age was kept constant for 10 days. Phosphate release Pr and uptake rates were determined for different glucose-organic acid mixtures in the feed wastewater. Maximum phosphate uptake (8.1 mg PI-1 h(-1)) and release rates (2.23 Ing PI-1 h(-1)) were obtained with the glucose-citric acid mixture. The highest (96%) percent phosphate removal at the end of the nutrient removal cycle (7.5 h) was also obtained with the glucose-citric acid mixture while the glucose-acetic acid mixture resulted in comparable percent phosphate removal (95%). (c) 2005 Elsevier Ltd. All rights reserved.