Advertisement

Water, Air, and Soil Pollution

, Volume 98, Issue 1–2, pp 1–15 | Cite as

Role of supplemental aeration in improving overloaded first-stage RBC performance

  • Rao Y. Surampalli
  • E. Robert Baumann
Article

Abstract

A study was conducted to evaluate the effectiveness of supplemental aeration in improving the performance of an rotating biological contactor (RBC) treatment system whose first and second stages were overloaded resulting in very low dissolved oxygen conditions and heavy beggiatoa growth thereby deteriorating process performance. A four-stage RBC having two parallel trains and treating combined municipal and industrial dairy wastewater was used to conduct the research. One train was provided with supplemental air in all stages and the other train, without supplemental air, was used as a control. Daily 24-hour compositie samples were collected at the influent to the RBC and at the end of each stage. Dissolved oxygen, pH, and temperature levels were measured in each stage. Samples were analyzed for soluble COD, ammonia nitrogen, total and volatile suspended solids. Samples were also analyzed for soluble BOD5 and oxygen uptake rate once a week. The biomass thickness on the discs was measured and growth conditions were noted. The experimental results indicate that RBC units with supplemental aeration demonstrated remarkable performance and ability to adapt to differing organic loading rates. In addition, beggiatoa growth was completely eliminated with supplemental air thereby establishing thinner and active aerobic biomass.

Key words

dissolved oxygen first-stage performance removal rate rotating biological contactor (RBC) supplemental aeration 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. American Public Health Association: 1985,Standard Methods for the Examination of Water and Wastewater, 16th Edition, American Public Health Association, Washington, D.C.Google Scholar
  2. Boller, M., Gujer, W. and Nyhuis, G.: 1990,Water Sci. Tech. 22, 89.Google Scholar
  3. Chesner, W. H. and Molof, A. H.: 1977,Prog. Water Technol. 9, 811.Google Scholar
  4. Chesner, W. H. and Iannone, J. J.: 1978, ‘Review of Current RBC Performance and Design Procedures’, A report prepared for USEPA under contract No. EPA-68-02-2775.Google Scholar
  5. Dupont, R. R. and McKinney, R. E.: 1980, ‘Data Evaluation of a Municipal RBC Installation’, Proc. of theFirst National Symposium on Rotating Biological Contactor Technology, Champion, PA.Google Scholar
  6. Hitdlebaugh, J. A. and Miller, R. D.: 1981,J. Water Pollution Control Federation 53, 1283.Google Scholar
  7. Gullicks, H. A. and Cleasby, J. L.: 1990,J. Water Pollution Control Federation 62, 40.Google Scholar
  8. Pano, A. and Middlebrooks, E. J.: 1983,J. Water Pollution Control Federation 55, 956.Google Scholar
  9. Stover, E. L. and Kincannon, D. F.: 1982, ‘Rotating Biological Contactor Scale-up and Design’, Proceedings of theFirst International Conference on Fixed Film Biological Processes. King's Island, OH.Google Scholar
  10. USEPA: 1983,A Nationwide RBC Teleconference, Cincinnati, OH.Google Scholar
  11. USEPA: 1984, ‘Summary of Design Information on Rotating Biological Contactors’, EPA-430/9-84-008, Cincinnati, OH.Google Scholar
  12. USEPA: 1993, ‘Process Design Manual for Nitrogen Control’, EPA/625/R-93/010, Washington, D.C.Google Scholar
  13. Water Environment Federation (WEF): 1992, ‘Design of Municipal Wastewater Treatment Plants’, Manual of practice No. 8, Alexandria, VA.Google Scholar

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Rao Y. Surampalli
    • 1
  • E. Robert Baumann
    • 2
  1. 1.U.S. Environmental Protection AgencyKansas CityU.S.A.
  2. 2.Emeritus Anson Marston Distinguished Professor of Engineering, Department of Civil EngineeringIowa State UniversityAmesU.S.A.

Personalised recommendations