Skip to main content

Elemental Sulfur (So) as a Supplemental Electron Donor for Wastewater Denitrification: Batch and Column Studies

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Many utilities are seeking more cost effective, safe, and reliable electron donors for biological nutrient removal (BNR). Elemental sulfur (So) may be an attractive option, but little is known about the feasibility of So-based denitrification and its kinetics. This study furthered our investigations into the kinetics and stoichiometry of So based denitrification. Using a series of batch reactors with 20 and 30 mgN/L nitrate, nitrite was found to accumulate during denitrification, and nitrite removal appeared to be slowed or completely inhibited. The stoichiometry for nitrate conversion to nitrite was estimated from these batch tests. The fs (fraction of electrons to biomass synthesis) was 0.54±0.03, and the biomass yield was 0.41±0.03 gVSS/gSo for batch reactors using So chips. For reactors with So powder, the results were similar: fs was 0.58±0.03 and the yield was 0.44±0.02gVSS/gSo. Two So packed-bed reactors, which had been running for 200 days, were used to determine the effects of backwashing and bioaugmentation with biofilm removed from the reactor. Vigorous backwashing removed all visible biomass. Reactors needed 2-4 days to remove nitrate and 11-13 days to remove nitrite. Adding biomass after backwashing improved the initial nitrate removal rate and the acclimation time, but had little effect on nitrite removal.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2012-01-01

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 These proceedings are not peer reviewed.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
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect 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