Award-Winning Technology - at Westport, Ontario

The Freeze-Crystallization (EVC®) Process - by Northern Watertek Corporation

   
 

     
   
 

   Spray field at Westport, Ontario


                     Viewpoint of the Municipal Council of Westport (February 15, 2002):

"The village of Westport has employed the innovative freeze-crystallization process for sewage effluent treatment for the past five and a half seasons. This technology was employed by the Village because the high level of treatment quality offered, tertiary plus, was necessary because of the environmentally sensitive status of the Upper Rideau Lake at the time. The Upper Rideau Lake was the effluent receiving body of water under the prior sewage treatment system.

   After five and a half years of winter operation, the system has operated according to design specification, has eliminated the requirement for a seasonal effluent discharge into Rideau Lake, and has no surface water or groundwater B-7 impacts on adjacent properties according to recent technical studies. The Municipal Council endorses this technology as an environmentally responsible and cost effective solution for small to mid size systems operating under environmentally sensitive conditions."

Scott Bryce, Clerk/Treasurer.

 
   
   
   
   


The system proposed for Munster, uses the science of "freeze-crystallization"
to kill microorganisms, and precipitate mineral-compounds,
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and Intermittent Sand Filtration as a final filter of the effluent.

 

   
   

Design Performance of Freeze Crystallization

Parameter Unit Influent
Low / High
Lagoon
Low / High
EVC®
Surface Discharge
Low / High
EVC®
& Exfiltration
*)
Ground Filter Effect
BOD5 mg/l 120 / 250 6 / 20+ 0 / 2 ND
Suspended Solids mg/l 200 / 315 5 / 30 3 / 5 ND
pH stu 6.8 / 7.2 6.7 / 7.2 8 / 9 7 - 8
Total Ammonia mg/l 7.5 / 40 7.5 / 40 0.1 / 0.1 ND
Organic Nitrogen mg/l 1 / 10 1 / 10 0.2 / 0.2 ND
Nitrites mg/l 0.5 / 1 0.5 / 1 0.01 / 0.01 < 0.01
Nitrates mg/l 1 / 2 1 / 2 0.1 / 0.1 < 0.1
Total Phosphorus mg/l 5 / 15 1.5 / 6 0.01 / 0.1 ND
Fecal Coliform MPN millions millions <4 / <4 ND
Pathogens in Aerosols MPN NA NA ND / ND NA
Coliphage in Aerosols MPN NA NA NA NA

 

   
         
   
   

LINKS:

Northern Watertek Corporation


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