Skip to main content

Sanitation Water Nitrogen Reduction with Two-Stage Biofiltration

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Reduction of nitrogen in domestic sanitation water is a concern in many environmentally sensitive areas. This paper reports on an eight month field demonstration of integrated two-stage biofiltration systems to reduce nitrogen in primary wastewater effluent. Three systems were operated in parallel, each employing a single-pass unsaturated trickle biofilter followed by a horizontal saturated denitrification biofilter. Unsaturated media were clinoptilolite, expanded clay, and granular rubber, while elemental sulfur was the electron donor in denitrification biofilters. Unsaturated biofilters were operated at a 2.9 gallon/ft2-day and 48 dose /day. Two of the systems achieved average nitrogen reductions exceeding 96%, with average effluent total and inorganic nitrogen less than 3 mg/L and 1 mg/L, respectively. Two-stage biofiltration is an appropriate technology for distributed infrastructure systems that can operate relatively passively. Issues to be further elucidated include sustained longer term performance, media longevity, required maintenance, and acceptability of sulfate levels in the effluent.

Keywords: biofiltration; denitrification; nitrogen reduction; sanitation water; sulfur

Document Type: Research Article

DOI: https://doi.org/10.2175/193864709793954501

Publication date: 2009-01-01

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 These proceedings are not peer reviewed.

    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
  • 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
X
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