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Waste Water Treatment

Solids. Waste Water Treatment. Plastics, Metals, sand, clay wood, Plant mater etc. Biodegradable organics. Material to be removed:. Carbohydrates, fat, protein, Petrolium proucts Other organics. Recalcitrants. Heavy Metals. Treatment Process. Primary Treatment.

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Waste Water Treatment

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  1. Solids Waste Water Treatment • Plastics, Metals, sand, clay • wood, Plant mater etc • Biodegradable organics Material to be removed: • Carbohydrates, fat, protein, • Petrolium proucts • Other organics • Recalcitrants • Heavy Metals

  2. Treatment Process • Primary Treatment • Physical • Secondary Treatment • Biological • Tertiary treatment • Chemical

  3. Melbourne Sewage System Western Treatment plant Eastern treatment Plant Regional treatment plans

  4. Eastern Treatment plant • Primary Treatment • Sludge • Grass Filtration • Land Filtration • Lagooning • Aerobic • Facultative

  5. Primary Treatment • Removes undissolved material and 70% of B.O.D. and includes: • Screening • Filtration • Sedimentation • Floatation • Product is “primary sludge”

  6. Floatation Screens

  7. Pebble Bed Filter

  8. Settlement

  9. Plant Layout

  10. Bushy Creek Plant

  11. Secondary Treatment • Bacteria digest organic mater • Aerobic • Anaerobic • Aerobic Digestion • Little smell • Trickle filter • Activated sludge • Aeration tanks • “Secondary sludge” left over • Hard to digest material

  12. Trickle Filter

  13. Pure Oxygen GeneratorAeration Tanks

  14. Activated Sludge

  15. Collecting Sludge

  16. Anaerobic Digestion • cellulose • lignin etc • Hard to digest material • Smelly gases produced • NH3 , H2S • Combustable Gases produced • Methane • Hydrogen • used to generate power • Anaerobic Sludge Digestion

  17. Anaerobic Sludge Digestion

  18. Co-Generation Plant • Uses Methane from Anaerobic digestion

  19. The End

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