Surface Water Pollution

Articles & Whitepapers

  • Complying with NPDES effluent guidelines

    Complying with NPDES effluent guidelines

    To comply with the stringent NPDES effluent guidelines, it is vital to understand the mechanisms and interactions that affect the balance in the aquatic ecosystems. The National Pollutant Discharge Elimination System (NPDES) requires power plants in the U.S. to control their levels of harmful pollutants released in surface waters according to the specific effluent limitations.

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Equipment & Solutions

  • Total Phosphorus Water Quality Online Automatic Analyzer
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    Total Phosphorus Water Quality Online Automatic Analyzer

    Under neutral conditions, the sample is digested by potassium phosphorus converting all of phosphorus into orthophosphate. Then under acidic conditions, orthophosphate reacts with molybdate and oxygen antimony potassium tartrate, generating phosphomolybdic acid that is reduced by ascorbic acid to form blue complex. The amount of blue complex is proportional to orthophosphate. Measurement by ...