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Journeys on a Limping Mule

Journeys on a Limping Mule. What We Know About Bioreactors. One who knows and knows that he knows... His horse of wisdom will reach the skies. One who knows, but doesn't know that he knows... He is fast asleep, so you should wake him up!

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Journeys on a Limping Mule

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  1. Journeys on a Limping Mule What We Know About Bioreactors

  2. One who knows and knows that he knows... His horse of wisdom will reach the skies. • One who knows, but doesn't know that he knows... He is fast asleep, so you should wake him up! • One who doesn't know, but knows that he doesn't know... His limping mule will eventually get him home. • One who doesn't know and doesn't know that he doesn't know... He will be eternally lost in his hopeless oblivion! Ibn Yamin Faryumadi (1286-1368)

  3. UU KU KU KK KK UK UK

  4. KK KU UK

  5. Why Bioreactors ? • Proven technology • Requires no modification of current practices • No land taken out of production • No decrease in drainage effectiveness • Very low maintenance • Estimated life - 10 to 15 years • Cost effective

  6. Corncob Mix data points Wood mix data points Corncob Mix fittedline Wood Mix fitted line CD=68% Concentration of Nitrate-N (mg/L) Hydraulic Retention Time (mins) Removal Efficacy is a Function of Oxygen Saturation, Carbon Source and Retention Time

  7. 100 20c 50c 80 Measured Points (2oC) % Nitrate Remaining 60 100c Concentration of Nitrate-N (mg/L) 150c 40 20 200c 250c Hydraulic retention time (mins) Removal Efficacy is a Function of Temperature

  8. First Generation Bioreactors

  9. Diversion Structure Second Generation Bioreactors Length/width dependent on contributing area 5’ Soil Backfill Capacity Control Structure Section of perforated tile Trench bottom 1’ Below tile invert Woodchips

  10. 5’ Soil backfill Top View 5’ section of non-perforated tile Diversion structure Capacity control structure

  11. Combination structure 5’ Soil backfill Perforated tile Non-perforated tile

  12. 60 minutes after injection 120 minutes after injection

  13. Dissolved MeHg in Bioreactor Inlets -Eight non-detects -Six samples contained detectable MeHg - Maximum: 0.16 ng/L - Average: 0.09 ng/L

  14. Dissolved MeHg in Bioreactor Outlets

  15. Diversion Structure Third Generation Bioreactors Length/width dependent on contributing area 5’ Soil Backfill Capacity Control Structure Section of perforated tile Trench bottom at the tile invert level Woodchips

  16. No nitrous oxide was released from the system

  17. Plastic Liner Solid pipe Perforated pipe Perforated pipe Solid pipe Phosphorus Removal Chamber

  18. Chipometer

  19. Thank You! Richard Cooke Department of Agricultural and Biological Engineering University of Illinois

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