Characterizing Mechanisms of Simultaneous Biological Nutrient Removal During Wastewater Treatment

WERF Report 00-CTS-17UR


Standard price: £29.00

Available as an ebook

Please purchase via www.iwaponline.comOpens in new window

Also part of Water Intelligence Online Digital Reference Library

Standard ePrice: £29.00


Access ebook

Author(s): PF Strom

Publication Date: 01/01/2004

Pages: 100

Binding: Paperback

ISBN13: 9781843397052

eISBN: 9781780404233

Download book flyer Print page

Simultaneous biological nutrient removal (SBNR) is the removal of nitrogen and/or phosphorus in excess of that required for biomass synthesis in biological wastewater treatment systems where there are no defined anaerobic and/or anoxic zones. The hypothesis is that one or more of three mechanisms is responsible within individual systems: variations in the bioreactor macroenvironment created by the mixing pattern, gradients within the floc microenvironment, and/or novel microorganism activity. Understanding of the mechanisms of SBNR can be expected to lead to improved efficiency and reliability in its application.

Preliminary work documented SBNR in 7 full-scale OrbalTM closed loop bioreactors. A batch assay demonstrated that novel microorganism activity was of little importance in SBNR at the three plants tested. While the floc microenvironment likely plays an important role in nitrogen removal in such plants, it cannot explain phosphorus removal.
A computational fluid dynamics (CFD) model was developed to elucidate the role of the bioreactor macroenvironment in SBNR. This is the first reported application of CFD to activated sludge biological wastewater treatment. Although the software and computational requirements limited model complexity, it still simulated the creation of dissolved oxygen gradients within the system, demonstrating that the anaerobic zones required for SBNR could occur.

PF Strom

The latest from @IWApublishing

RT : Are you interested in contributing to the Special Issue on ? 5 days 17 hours ago
"Propagation dynamics and causes of hydrological in response to drought at seasonal timesc… 1 week 17 hours ago
RT : 🚨Not long left to submit your paper for peer review and possible publication in this Special Issue ⬇ Relevant topi… 1 week 17 hours ago