Rathbun Regional Water    Association, Inc.   Water Treatment Plant  Source Water Evaluation
Chariton River WTP Intake
Overview of Treatment
Principles of Operation•   Oxidation and Precipitation•   Coagulation•   Flocculation•   Sedimentation•   Filtration•   di...
SuperPulsating Clarifiers
Solids Contact Basins
Chemical Feed
Filtration
High Service
Analyzers
Performance Based Training                                                                 Turbidity Profile              ...
Source Water Evaluation1.   Organics/Manganese2.   Taste and Odor3.   Turbidity4.   Alkalinity5.   Farm Chemical Applicati...
Organics and Manganese•   Often Bound together•   Removal contrast based on pH (TOC/Mn)•   Sodium Permanganate•   Rainfall...
36 “ Screened Intake
Taste and Odor• Spring flush of nutrients into lake• Dry summers influence stratification  – Sunlight penetration due to s...
Turbidity•   Very low turbidity is hard to treat (< 5ntu)•   High turbidity can be expensive (>100ntu)•   Rathbun range is...
Discharge 2010
Alkalinity• Requirement for coagulation buffer  – 0.5 mg/L plus 35 mg/L residual• Extreme flooding (2007-2008) downstream•...
New Caisson
Farm Chemical Application•   Atrazine and Nitrogen•   Nearly eliminated since RLWA improvements•   Carbon caps on filters•...
Syngenta Atrazine
Bacteria/Cryptosporidium•   Manure Runoff•   Ecoli and Fecal Coliform•   Chlorine Demand•   4-log removal of crypto•   Con...
Questions???• mbraster@rrwa.net• jbuckingham@rrwa.net• (800) 233.8849• www.rrwa.net• www.rathbunlandwateralliance.blogspot...
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Soil & Water Management - Jer Buckingham, Rathbun Land and Water Alliance - How Land Use Affects Water Quality

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The speakers will address the differences between row crops and permanent pasture regarding the amount of sediment and pollutants that wind up in the Lake Rathbun and discuss the challenges of removing some substances from the water so that it meets their high standards for potability.

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Soil & Water Management - Jer Buckingham, Rathbun Land and Water Alliance - How Land Use Affects Water Quality

  1. 1. Rathbun Regional Water Association, Inc. Water Treatment Plant Source Water Evaluation
  2. 2. Chariton River WTP Intake
  3. 3. Overview of Treatment
  4. 4. Principles of Operation• Oxidation and Precipitation• Coagulation• Flocculation• Sedimentation• Filtration• disinfection
  5. 5. SuperPulsating Clarifiers
  6. 6. Solids Contact Basins
  7. 7. Chemical Feed
  8. 8. Filtration
  9. 9. High Service
  10. 10. Analyzers
  11. 11. Performance Based Training Turbidity Profile Raw Max Sed Max Filter Combined 100.0Turbidity (NTU) 10.0 1.0 0.1 0.0 Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11
  12. 12. Source Water Evaluation1. Organics/Manganese2. Taste and Odor3. Turbidity4. Alkalinity5. Farm Chemical Application6. Bacteria/Cryptosporidium
  13. 13. Organics and Manganese• Often Bound together• Removal contrast based on pH (TOC/Mn)• Sodium Permanganate• Rainfall events push organics into lake – Leaves, trees, brush, etc.• Lake stratification promotes Mn build up• Low dissolved oxygen concentration – New Caisson provide relief from lake bottom
  14. 14. 36 “ Screened Intake
  15. 15. Taste and Odor• Spring flush of nutrients into lake• Dry summers influence stratification – Sunlight penetration due to settling• Geosmin and Methoisoborneol -2 (MIB) – Encapsulate in blue-green algae cell walls – Release when cyanotoxins are present• Phosphorus reduction can help
  16. 16. Turbidity• Very low turbidity is hard to treat (< 5ntu)• High turbidity can be expensive (>100ntu)• Rathbun range is 3 – 500 ntu. Avg. is 25 ntu.• Sediment removal is a great benefit.• Rainfall events > 1” above and below intake are detrimental to optimization.
  17. 17. Discharge 2010
  18. 18. Alkalinity• Requirement for coagulation buffer – 0.5 mg/L plus 35 mg/L residual• Extreme flooding (2007-2008) downstream• Rathbun uses Sodium Hydroxide to buffer – 1.65 mg/L dosage to achieve 1 ppm residual
  19. 19. New Caisson
  20. 20. Farm Chemical Application• Atrazine and Nitrogen• Nearly eliminated since RLWA improvements• Carbon caps on filters• Powder Activated Carbon
  21. 21. Syngenta Atrazine
  22. 22. Bacteria/Cryptosporidium• Manure Runoff• Ecoli and Fecal Coliform• Chlorine Demand• 4-log removal of crypto• Conservation practice to maintain low influent
  23. 23. Questions???• mbraster@rrwa.net• jbuckingham@rrwa.net• (800) 233.8849• www.rrwa.net• www.rathbunlandwateralliance.blogspot.com

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