Wastewater Testing Equations

  • Sample volume

    1,000,000 ppm

    X

    Known Chemical ppm

    =

    HOW MUCH TO ADD TO SAMPLE

    Ex

    500 ml

    1,000,000 ppm

    =

    0.0005 x 1,000 ppm (6016)

    =

    0.5 ml of 6016
    added to jar test

  • Amount of chemical added to sample

    Sample volume

    X

    1,000,000 ppm

    =

    PPM OF CHEMICAL ADDED

    Ex

    2 ml (6016)

    500 ml water

    =

    0.004 x 1,000,000 ppm

    =

    4,000 ppm (6016)

Converting PPM to GPH:

  • (Plant flow rate in GPM x 60 min)

    1,000,000 ppm

    X

    desired chemical ppm

    =

    CHEMICAL FEED RATE

    Ex

    25 GPM x 60 min

    =

    1500 GPH

    1,000,000 ppm

    =

    0.0015 x 4,000 ppm (6016)

    =

    6 GPH (6016

Adjusting chemical pumps to desired feed rate:

  • Pump max feed rate (GPD)

    24 hours

    =

    MAX FEED RATE

    Ex

    85 GDP

    24 hours

    =

    3.54 GPH
    (feed rate)

Use previous equation to determine chemical feed rate (GPH)

  • Ex

    25 GPM x 60 min

    =

    1500 GPH

    1,000,000 ppm

    =

    0.0015

    0.0015 x 2,000 GPH
    (6016 desired flow rate)

    =

    3 GPH

    Needed feed rate

    Max pump feed rate

    =

    3 GPH

    3.54 GPH

    =

    85% (set pump at 85% of max feed rate)

Dilution factor (mostly for floc)

  • Day tank floc volume

    Volume of water added

    =

    % Product

    Ex

    10 gal (300 L)

    100 gal water

    =

    10%

Keep in mind when you decide on a needed chemical feed, you must divide the PPM by the dilution factor.

  • 300 ppm (desired 300 L)

    0.1

    =

    3000 ppm
    feed rate

DMP's Coronavirus COVID19 Statement to Customers

The state of Illinois recently issued a shelter in place order for all workers and businesses considered non-essential by The Cybersecurity and Infrastructure Security Agency (“CISA”), an agency in the Department of Homeland Security.

According to the memorandum, DMP & ISC – A DMP Corp Company – is considered a critical manufacturing company due to our supplying mission-critical chemicals required for the operation of the rail and wastewater industries. As a result, our primary chemical manufacturing facility in Illinois will continue to operate.

We will continue to receive and fill orders through this difficult time to support our customers and will keep you posted on any new information that may affect your business. Read more here.