Skip to Main Content

Dissolved Organic Nitrogen Characterization and Bioavailability in Wastewater Effluents

By
Krishna R. Pagilla
Krishna R. Pagilla
Illinois Institute of Technology, Armour College of Engineering, 10 W. 33rd Street Suite 127, Chicago IL 60616, , Phone: (312) 567-5717, Fax: (312) 567-8874, Email: pagilla@iit.edu
Search for other works by this author on:
Meltem Urgun-Demirtas
Meltem Urgun-Demirtas
Illinois Institute of Technology
Search for other works by this author on:
IWA Publishing
Volume
9
ISBN electronic:
9781843393542
Publication date:
February 2010

This project addresses the dissolved organic nitrogen (DON) content in the effluents of different wastewater treatment plants (WWTPs). In this report, information is presented on the occurrence and levels of DON in WWTP effluents and its bioavailability. The information presented was generated by a survey of existing data from full scale plants achieving TN removal, direct sampling and monitoring of effluents from selected plants, and laboratory investigations on DON production in biological processes of WWTPs and its bioavailability to algae and bacteria. The results showed that there is a wide variation in effluent DON at different plants, ranging from non-detectable levels to as high as 2.5 mg N/L. The DON fraction of the effluent TN increases with decrease in effluent TN values, and could be as high as 85% of effluent TN. Size fractionation of effluent organic nitrogen (ON) fraction passing through a 1.2 μm filter showed that a significant colloidal fraction of ON exists between 0.1 and 1.2 μm particle size range in some plants. A fraction of the effluent DON is readily bioavailable to algae and bacteria in laboratory bioassays, and the presence of both algae and bacteria species in the bioassay increases the bioavailable DON fraction.

This title belongs to WERF Research Report Series.

ISBN: 9781843393542 (eBook)

Dissolved Organic Nitrogen Characterization and Bioavailability in Wastewater Effluents
By: Krishna R. Pagilla, Meltem Urgun-Demirtas
DOI: https://doi.org/10.2166/9781843393542
ISBN (electronic): 9781843393542
Publisher: IWA Publishing
Published: 2010

Download citation file:


×
This content is PDF only. Please click on the PDF icon to access.
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal