Skip to main content

Simultaneous Nitrification Denitrification in an Aerobic MBR Treating High Strength Pet Food Wastewater

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

This paper discusses nitrogen removal mechanisms in an aerobic membrane bioreactor (MBR) treating high strength pet food wastewater characterized by oil & grease, COD, BOD5, TSS, TKN, NH4-N concentrations of 2800 mg/L, 25000 mg/L, 10000 mg/L, 4500 mg/L, 1650 mg/L and 1300 mg/L respectively. An MBR operating at SRT >25 days achieved mixed liquor total suspended solids (MLTSS) concentrations >30000 mg/L with a mean particle size of 50 μm. Potentials for various nitrogen removal mechanisms in the MBR were evaluated. Even at DO of 1.3 mg/L and oxygen reduction potential (ORP) > +90, the MBR removed > 200 mg/L of influent nitrogen by simultaneous nitrification denitrification (SND) through nitrite pathway. Contrary to the general diffusion limitation hypothesis, this paper infers the nitrification and denitrifications to take place in separate sludge particles. Mass balance revealed cell synthesis, stripping and SND to remove 14%, 17% and 21% of the influent nitrogen respectively.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864706783750457

Publication date: 2006-01-01

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 These proceedings are not peer reviewed.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
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