HYDROGENOTROPHIC WASTEWATER DENITRIFICATION USING HOLLOW FIBER MEMBRANE BIOREACTORS

$17.50 plus tax (Refund Policy)

Buy Article:

Abstract:

Two membrane module configurations (Type I and Type II) were studied for denitrification of nitrate contaminated water using hydrogen (H2) as an electron donor. In both systems, hollow fiber membrane gas transfer modules were used to supply H2 to a denitrifying biofilm. In the Type I system, denitrification took place on the shell side and in Type II system denitrification took place on the lumen side of the fibers. Two bench scale hollow fiber membrane bioreactors (HFMBs) were constructed and investigated for treatment of nitrate contaminated water in a continuous process. Hydraulic retention time (HRT), influent oxygen concentration, and influent wastewater composition were varied during the experiments. Mass transfer models were developed for Type I and Type II systems and used to compare overall mass transfer coefficients for these systems. Acclimatized batch cultures from a wastewater treatment plant were used to inoculate the two HFMBs. A HRT of 8.7 hours was optimized for Type I system while a HRT of 10 hours was maintained in the Type II system. High nitrite concentrations were observed in both the systems during the initial acclimation phases, possibly due to organic carbon limitations. Nitrite accumulation was also observed during periods of pH stress, which were overcome by replacing periodic carbon dioxide sparging with bicarbonate addition to the feed water. Clogging problems were more frequent for the Type II system due to the accumulation of biomass in the narrow lumen of the membranes. Biomass clogging was rectified by periodically backwashing with the influent wastewater.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864705783867332

Publication date: January 1, 2005

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 These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • ingentaconnect is not responsible for the content or availability of external websites

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more