1 / 18

A Study on Optimizing Biological Phosphorous Removal by Changing Aerobic Operating Times

A Study on Optimizing Biological Phosphorous Removal by Changing Aerobic Operating Times. Phillip Dixon and Juan Diaz-Robles CEE 453 Laboratory Research in Environmental Engineering December 11, 2004 Cornell University Ithaca, NY 14850. Topics To Be Covered.

Download Presentation

A Study on Optimizing Biological Phosphorous Removal by Changing Aerobic Operating Times

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. A Study on Optimizing Biological Phosphorous Removal by Changing Aerobic Operating Times Phillip Dixon and Juan Diaz-Robles CEE 453 Laboratory Research in Environmental Engineering December 11, 2004 Cornell University Ithaca, NY 14850

  2. Topics To Be Covered • Introduction to Phosphorous Removal • Experimental Objectives • Materials and Methods • Setup • Procedures • Results and Conclusions • Suggestions • References • Questions?

  3. Introduction to Phosphorous Removal • Phosphorous is a Nutrient Essential to Plant Growth • Responsible for Eutrophication • Interferes with the Health and Diversity of the Water Body • Blooms of Algae • Clouds Water • Underwater Grasses Die • Fish Kills

  4. Introduction to Phosphorous Removal • Very Important for WW Treatment Plants to remove Phosphorous from effluent • Phosphorous Removal Accomplished by • Exposing the WW to an aerobic/anaerobic sequence in a Biological Reactor

  5. Introduction to Phosphorous Removal • Aerobic/Anaerobic sequence will cause the reactor to select for phosphorous removing microorganisms • Anaerobic Sequence Phosphorous Removing Microbes Release Phosphorous to Produce Energy to take up Fermentation Products • In the Aerobic Sequence the Microbes produce energy by oxidizing the fermentation products and simultaneously take up phosphorous • The Phosphorous is Removed from Solution as Intercellular Phosphorous in the Form of Sludge

  6. Introduction to Phosphorous Removal • Phosphorous removal can be optimized by varying aerobic and anaerobic operating times • Something that was Researched throughout this Project

  7. Experimental Objectives • The Research’s Objective was to find the effect on Phosphorous Removal when Aerobic Operating Times were changed while maintaining a Constant Anaerobic Operating Time

  8. Materials and Methods • Setup • Refrigerator • Wastewater influent • Tap water influent • Samples collected

  9. Materials and Methods • Setup • Peristaltic pump • Air source • Reactor • Pressure sensor • Stirrer • Effluent (Drain)

  10. Materials and Methods • Procedures • States in reactor cycle • Influent wastewater (140 mL) • Influent tap water (2.66 L) • Anaerobic phase (1.5 h) • Aerobic phase (3, 4.5, and 6 h) • Settle (1 h) • Drain (up to 1.2 L) • Samples collected twice a day (minimum of 8 h apart)

  11. Materials and Methods • Procedures • Colorimetric wet chemistry technique • Intensely colored antimony-phopho-molybdate complex • Blue-colored in acid medium (ascorbic acid) • Color proportional to phosphorous concentration • Combined color reagent • 4.9 N H2SO4 (50 mL) • Ammonium molybdate solution (15 mL) • Ascorbic acid solution (30 mL) • Antimony-tartrate solution (5 mL)

  12. Materials and Methods • Procedures • 950mL of E-pure water • 50mL of Sample • 160mL of Reagent

  13. Results and Conclusions • Removal and “Production” of Phosphorous • Results suggest that there is little evidence of Phosphorous Removal • Tried collaborating with another group • varied anaerobic operating time while keeping aerobic operating time constant • Results suggest little evidence of Phosphorous Removal • We have no recommendations on the Optimum Operating times for Phosphorous Removal

  14. Results and Conclusions

  15. Suggestions • Precise manner in mixing the components for the combined color reagent • Samples should be diluted prior measuring in the spectrophotometer • Collect samples shortly after the draining stage of a cycle has been completed • Collect samples without sludge particles • Analyze samples shortly after collected or refrigerate them before analysis

  16. References CEE 453 Phosphorous Measurements. “Phosphorus Measurements.” December 7, 2004. http://ceeserver.cee.cornell.edu/mw24/cee453/ Lake Champlain Basin Program. “Phosphorus Pollution.” December 3, 2004. http://www.lcbp.org/phospsum.htm US EPA. “Eutrophication.” September 8, 2003. http://www.epa.gov/maia/html/eutroph.html Wisconsin Department of Natural Resources. “Wastewater Characterization for Evaluation of Biological Phosphorous Removal.” April 29, 2003. http://www.dnr.state.wi.us/org/water/wm/ww/biophos/1intro.htm Pictures of the laboratory setup are courtesy of Sarah.

  17. Environmental Engineers’ efforts are in trying to avoid…

  18. THANK YOU QUESTIONS?

More Related