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Microbiological Succession a.k.a Bug Growth

Microbiological Succession a.k.a Bug Growth. Hugh Ratsey Opus ETC. What is the aim of today?. Give an overview of wastewater microbiology Provide a case study showing microbiological succession Demonstrate how “bugs” can be used to understand a treatment process

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Microbiological Succession a.k.a Bug Growth

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  1. Microbiological Successiona.k.aBug Growth Hugh Ratsey Opus ETC

  2. What is the aim of today? • Give an overview of wastewater microbiology • Provide a case study showing microbiological succession • Demonstrate how “bugs” can be used to understand a treatment process • Get you all (well, some of you!) enthused about peering down a microscope

  3. Wastewater Microbiology

  4. Bacterial Growth Curve

  5. Case Study N & P dosing N & P dosing Roughing Tower Effluent Bio 2 Selector Bio 1 AS 2 WW2 AS 1 RAS WAS

  6. Case Study – Bio 1

  7. Case Study – Bio 2

  8. Case Study – Selector

  9. Case Study – AS 1

  10. Case Study – AS 2

  11. Microbial Succession

  12. So What? • Bugs can be used for: • Monitoring • Troubleshooting • If you still don’t believe me…

  13. Dispersed Bacterial Growth • Will result in: • Solids carry-over in effluent • Can be caused by: • Toxic shock • Insufficient nutrients • High temperature • Low dissolved oxygen (DO)

  14. Filamentous Bacteria Growth • Will result in: • Poor sludge settlement • Solids carry-over in effluent • Can be caused by: • Low dissolved oxygen (DO) • Greasy wastewater • Insufficient nutrients • Septic wastewater

  15. Good Balance of Life • Will result in: • Good sludge settlement • Low suspended solids in effluent • Good nitrification • Can be caused by: • “Correct” environment • Stable conditions

  16. Questions? ?

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