CHEMSCAN
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      • Aeration Control and Energy Cost Reduction
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    • ChemScan Mini Analyzer >
      • mini oP (Ortho Phosphate)
      • mini oP (Ortho Phosphate) Extended Range
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      • mini LoP (Low Ortho Phosphate)
      • mini UV-254
      • mini LowAm (Low Ammonia)
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​APPLICATIONS

Success Stories
Smaller Wastewater Plants Meet Phosphorous Limits
​Using ChemScan
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Customer Profile
​Multiple mini oP analyzers are located in Wisconsin.
​Featured Product
ChemScan mini oP Analyzer (pictured in optional enclosure)
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Overview
Phosphorous has Iong been recognized as a controlling factor in plant and algae growth. In 2010 Wisconsin became one of the first states to require all NPDES discharge permits to require limits on Phosphorous, regardless of the size of the plant or the location of the receiving watershed. It is currently one of the few states to have achieved the benchmark where 100% of the treatment plants have permit limits for Phosphorous.   

Challenge 
Phosphorous limits pose a difficult challenge for smaller wastewater plants, especially those treating under 1 million gallons per day. These plants have limited resources, usually have variable load and flow contributions from local industries, but do not have very much operational flexibility beyond their original design capacity to allow for new discharge requirements. Some plants turned to chemical treatment by adding a metal salt (ferric or alum) that combines with dissolved Phosphorous, forming a precipitate which settles out in the final clarification or filtration step. But these plants soon learned that feeding the chemical at a fixed rate was expensive because, if the feed rate was adequate during peak demand, it was excessive the rest of the time. Flow pacing the chemical was not an improvement, because the Phosphorous concentration does not synchronize very well with the flow rate.      

Solution 
A solution was needed that would allow the treatment chemical to be fed based on the Phosphorous demand.  More than 30 small wastewater treatment plants in Wisconsin now use the ChemScan mini oP to help them meet their discharge limits for Phosphorous. The mini oP analyzer can be set up to directly detect ortho (dissolved) Phosphorous in final effluent or at a sample point downstream from the final settling/filtration step, without a sample filter. This allows an analysis of residual ortho-Phosphorous every few minutes, with a signal fed back to the chem feed controller or SCADA, allowing the chemical feed rate to be automatically adjusted. The analyzer can be configured to detect at a normal (0.1 to 6.0 mg/l ) or extra low (0.03 to 3.0 mg/l) concentration limit, with the lower detection limit of the analyzer well below the discharge limit for the plant. This allows operation within a control band for continuous compliance. At some treatment plants the analyzer has been installed in a special outdoor enclosure that includes a sample filter, thus allowing analysis of samples to be fed forward from the aeration basin or other upstream sample point where high solids concentrations are typical. 

​Tom Pluess, Superintendent at the East Troy WWTP has a ChemScan mini oP that has been in operation for about 10 years. He says that the analyzer helps control the feed rate, helps pinpoint the time of Phosphorous contributions to the plant and is also helping during the evaluation of new treatment chemicals by providing real time information during experiments. He says, “ChemScan works really well for us. I cannot say enough about their customer service.” Another plant manager in central Wisconsin, where the analyzer has been in operation for more than 10 years, said that ChemScan helps save thousands in annual chemical costs. 
Chris August, Superintendent at the Kiel WWTP says that ChemScan “has helped us save a lot of money and helps control and operate our facility.” He is one of many who note that the ChemScan mini oP analyzer “paid for itself within the first year of operation”.
​“ChemScan has helped us save
a lot of money and helps control
​and operate our facility.”
​​
Download this success story
ChemScan, Inc.
2325 Parklawn Dr., Suite I, Waukesha, Wisconsin, USA 53186
​Phone: 262-717-9500
Toll Free: 800-665-7133
  • Applications
    • Municipal Water Monitoring >
      • Ammonia Feed
      • Chloramination Control
      • Chlorination
      • Color Analysis
      • Distribution Monitoring
      • Ion Exchange Breakthrough
      • Natural Organic Matter (NOM) Removal
      • Peak Point Chloramination Control
      • Phosphate Sequesterant Feed Control
      • Reservoir Monitoring
      • Security Monitoring
      • TOC Monitoring in Water
      • Well Blending
    • Wastewater Monitoring and Control >
      • Aeration Control and Energy Cost Reduction
      • Biological Nutrient Removal
      • Biological Phosphorus Removal
      • Chemical Phosphorus Removal
      • Chloramination /Breakpoint Avoidance
      • Chlorination/De-Chlorination
      • De-Nitrification Monitoring
      • Nitrification
      • Nutrient Deficiency Analysis
      • Lagoon Discharge
      • SBR Stage Control
      • TOC Monitoring
      • UV Disinfection Control
    • Industrial Water Treatment >
      • Boiler Water Analysis
      • Cooling Water Analysis (Closed Loop)
    • Industrial Process Monitoring >
      • Electroless Plating
    • ASA Technical Papers (ALL)
    • ChemScan Installation Photos
    • Success Stories
    • ChemScan Webinars
  • Service
    • Contact Service Request Form
    • ChemScan Service Team
    • MSDS
    • Communication Protocols
    • Software Utilities
    • Service Videos
  • Parts
  • Company
    • Terms and Conditions
    • Contact Form (General Inquiry)
    • Contact Service
    • Application Data Sheet
    • Employment Opportunities
    • ChemScan Representatives and Distributors
  • Products
    • ChemScan Mini Analyzer >
      • mini oP (Ortho Phosphate)
      • mini oP (Ortho Phosphate) Extended Range
      • mini Cu (Copper)
      • mini LoP (Low Ortho Phosphate)
      • mini UV-254
      • mini LowAm (Low Ammonia)
      • mini Mn (Manganese)
      • mini LowMn (Low Manganese)
      • mini LowChlor (Low Chlorine)
      • mini Sulfite
      • mini Ammonia
      • mini FreeAm (Free Ammonia)
      • mini Fe (Iron)
      • mini Ni (Nickel)
      • mini PAA (Peracetic Acid)
      • mini ChlorAm
    • ChemScan mini Accessories
    • ChemScan Process Analyzers >
      • ChemScan 2150/S Chloramination Analyzer
      • ChemScan 2150/DC Chem Feed Analyzer
      • ChemScan 2150/N Aeration Rate Analyzer
      • ChemScan 2150/NoP Chem Feed Analyzer
      • ChemScan 2150/NHoP Nutrient Analyzer
      • ChemScan 2150 Process Analyzer
      • ChemScan UV-3150 Process Analyzer
      • ChemScan 4100 Nutrient Control
      • ChemScan 6101 Nutrient Control
    • ChemScan Process Analyzers with HMI >
      • ChemScan 2250/S HMI Chloramination Analyzer
      • ChemScan 4200 HMI Analyzer
      • ChemScan 3250 HMI Analyzer
      • ChemScan 2250/NoP HMI Analyzer
      • ChemScan 2250/NHoP HMI Analyzer
      • ChemScan 2250/N HMI Analyzer
      • ChemScan 2250 HMI Analyzer
      • ChemScan 6201 HMI Analyzer
    • ChemScan Analyzer Accessories
    • ChemScan Sensor Family