Skip to main content

Full-scale Results from a Biofilm Carrier Process Treating Wastewater from an Ethylene Glycol Reclamation Facility

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The Consolidated Recycling Co., Inc. (CRCI) reclaims between 5 and 6 million gallons of previously used ethylene glycol from spent antifreeze every year. The distillation process generates ethylene glycol contaminated wastewater which must be treated prior to discharge to the municipal wastewater treatment plant. CRCI upgraded the existing facility in 2005 with a biofilm carrier treatment system, an aerobic process employing fluidized carriers. Laboratory testing was first conducted to evaluate the treatability of the CRCI wastewater and to determine full-scale design parameters. Laboratory-scale testing indicated that removal rates greater than 16-18 gCOD/m2 /d were achievable using biofilm carriers and the results of the testing provided the design basis for the full-scale installation. The full-scale biofilm carrier system was seeded with sludge from an onsite aeration pond, and the effluent SCOD concentration was reduced to below 400 mg/L almost immediately following initiation of flow. The influent flow to the bioreactor was increased to 80% of the design flowrate, while maintaining effluent targets, within 40 days of start-up. The system has been operating for over one year and has reliably produced effluent COD concentrations below the required levels of 550 mg/L. Effluent concentrations of phenol have consistently been maintained below 0.6 mg/L. The results from this study demonstrated that an aerobic biofilm carrier process provided a robust treatment solution for wastewater generated from an ethylene glycol reclamation facility. The system required minimal operator intervention and has produced high quality effluent since initiation of flow including a low sludge yield of 0.23 gTSS/gCOD. The finding suggested that biofilm carrier processes provide an economically viable alternative to discharging glycols to municipal wastewater treatment plants.
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: 2007-10-01

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