BIOAVAILABILITY OF DISSOLVED ORGANIC NITROGEN IN TREATED EFFLUENTS
The objective of this study was to assess the bioavailability of dissolved organic nitrogen (DON) in wastewater effluents from a total nitrogen removal plant and a nitrification only plant. The bioavailability of DON was assessed using bacterial and algal inocula in a 14-day bioassay developed using existing methods in limnology and oceanography literature. Nitrogen species, dissolved organic carbon, chlorophyll a, and biomass (as TSS and culturable cell counts) concentrations were measured to assess bioavailability during the bioassays. An increase in the concentration of chlorophyll a in the algal samples with a concurrent increase in algal biomass over time, and an increase in bacterial counts over time and a decrease in DON concentration over time, and increase in the C: N ratio at the end of the 14-day incubation period could be considered as indicators of DON bioavailability to algae and bacteria. The experimental results showed that 18 to 61% of the DON in low TN wastewater effluent sample was bioavailable in the 14-day bioassays. The DON results suggested that bacteria and algae uptake DON as well as release DON to the culture medium as a result of their metabolic activities during their growth.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2007-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites