sodium hypochlorite operating experiences - · pdf filesodium hypochlorite operating...
TRANSCRIPT
![Page 1: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/1.jpg)
Sodium HypochloriteOperating Experiences
Jim Van De Wege
Holland Water Treatment
Bob Veneklasen
Muskegon Water Treatment Plant
![Page 2: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/2.jpg)
Objectives
1. Water treatment plants & process needs
2. Evolution of the disinfection process
3. System design from an operating perspective
4. Operational challenges
5. Lessons Learned
![Page 3: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/3.jpg)
SW Shores of Lake Michigan
![Page 4: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/4.jpg)
Holland Water Treatment Plant
38.5 MGD conventional treatment plant
Chemical addition, mixing, flocculation, sedimentation, filtration
Process chemicals: aluminum sulfate, liquid fluoride & sodium hypochlorite
![Page 5: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/5.jpg)
Muskegon Water Treatment Plant
40 MGD conventional treatment plant
Chemical addition, mixing, flocculation, sedimentation, filtration
Process chemicals: aluminum sulfate, liquid fluoride & sodium hypochlorite
![Page 6: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/6.jpg)
Process Diagram
Low lift pump
Settling basinsFlocculationBasins
High liftpumpsClearwell
Rawwater
Treatedwater
FiltersMIxing
Chamber
CoagulantCl
![Page 7: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/7.jpg)
Evolution of Disinfection Process
Liquid chlorine hazardous and difficult to handle
PSM, Hazmat Training-Expensive!
Emergency response equipment-Expensive!
Tested chlorine tablets, sodium hypochlorite
Selected sodium hypochlorite
Holland, Muskegon, & Traverse City first in area to convert to sodium hypochlorite
![Page 8: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/8.jpg)
Why Sodium Hypochlorite?
Evolution of Disinfection Process
![Page 9: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/9.jpg)
Evolution of Disinfection Process
Safety ConcernsEmployeesResidential areaNearby schoolsHeavy recreational use during summer-parks & beachesBordered by bike pathsSlow initial emergency response
![Page 10: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/10.jpg)
Evolution of Disinfection Process
Simplified PSM
Minimal Hazmat training
No scrubbers
No more ton cylinders
Ease of off loading or unloading
Less reporting requirements
Process Stability
Advantages of Sodium Hypochlorite
![Page 11: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/11.jpg)
System Design
Ability to meter off loading
Ability to dilute bulk deliveries
Proper pump sizing-size matters
Easy access to controls
Input/Outputs for SCADA control, monitoring & alarming
![Page 12: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/12.jpg)
System Design
Ability to easily calibrate pumps
Ability to easily drain & flush system out
Chemical flow pacing
Ability to meter chemical feed rate
Auto pump stop if incoming flow drops to zero
![Page 13: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/13.jpg)
System Design
Easy access for maintenance-preventive/reactive
Chemical tank monitoring-consider scales for day tank monitoring
Improved chemical containment facilities
Safety showers & eye wash stations
![Page 14: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/14.jpg)
System Design
Sodium Hypochlorite Feed System
![Page 15: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/15.jpg)
System Design
Chemical Day Tanks
![Page 16: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/16.jpg)
Operational Challenges
Off gassing-air bound pumps
Gasket failures
Burping
Product stability-storage
Valve failures, binding
Bleaching of clothing
![Page 17: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/17.jpg)
Operational Challenges
Leaking joints and fittings
![Page 18: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/18.jpg)
Operational Challenges
Corrosion of equipment Scaling-pipes, meters, pumps
![Page 19: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/19.jpg)
Operational Challenges
Coating failures
![Page 20: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/20.jpg)
Operational Challenges
Case Study-HollandDate: July 21, 1998: Chemical mixing incident
Contractors on-site completing 10 MGD plant expansion
Tanker delivery of aluminum sulfate scheduled for morning delivery
Chemical pumped to third floor storage tank
![Page 21: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/21.jpg)
Operational Challenges
Case StudyDelivery sodium hypochlorite, not alum!
Chlorine gas vented when 256 gal of sodium hypochlorite reacted with 400 gal of alum
![Page 22: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/22.jpg)
Operational Challenges
Chlorine Gas Damaged Equipment
![Page 23: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/23.jpg)
Unwanted Headline
Chemical spill sends 8 to hospital!Tuesday, July 21, 1998By Kristen Appleyard
Staff writer, Holland Sentinel
![Page 24: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/24.jpg)
Operational Challenges
What chemicals could be a problem when mixed with sodium hypochlorite?
Ferric Chloride
Fluosilicic Acid (Hydrofluosilicic Acid)
Alum (Aluminum Sulfate)
![Page 25: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/25.jpg)
Operational Challenges
Case Study-Muskegon
Carrier water not treated initially
Lines became blocked
Pressure increased
Flow decreased
![Page 26: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/26.jpg)
Lessons Learned
Daily inspections
Exercise valves
Preventive Maintenance
Proper use of PPE
Strainers on pump supply
Improved HVAC systems in chemical storage areas
![Page 27: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/27.jpg)
Lessons Learned
Improved AlarmingImproved inventory controlImproved Labeling
![Page 28: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/28.jpg)
Lessons Learned
Detailed chemical delivery procedures
Delivery check off lists
![Page 29: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/29.jpg)
Lessons Learned
Chemical off loading stations
![Page 30: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/30.jpg)
Lessons Learned
Eliminate threaded joints
Use of Teflon tape & thread compound
Viton Gaskets
Maintain inventory-valves, seals, & PVC pipe
Stainless hardware
Installed off loading sampling station
Label valves-open/close, valve keys
![Page 31: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/31.jpg)
Lessons Learned
Improved Monitoring
![Page 32: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/32.jpg)
Lessons Learned
Repositioned chemical meters
![Page 33: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/33.jpg)
Lessons Learned
Treated carrier water-phosphateFlush chemical feed lines on a regular basisFlush out unused pumpsTreat to avoid CaCl buildup in bulk storage tanks
![Page 34: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/34.jpg)
Future Considerations
Peristaltic pumpsBeta testing of diaphragm pump with new pump head design
![Page 35: Sodium Hypochlorite Operating Experiences - · PDF fileSodium Hypochlorite Operating Experiences ... System design from an operating ... Muskegon Water Treatment Plant](https://reader030.vdocuments.net/reader030/viewer/2022021419/5a9874ac7f8b9a451b8d322d/html5/thumbnails/35.jpg)
Acknowledgements
Holland Water Treatment Plant Staff
Muskegon Water Treatment Plant Staff