Dairy Wastewater Treatment

dairy wastewater treatment, dairy plant production, milk bottle production

Dairy Wastewater Treatment With FRC DAFs & IPEC Screens

Dairy manufacturers produce anywhere from 1-6 gallons of wastewater per gallon of raw milk input. This wastewater contains high concentrations of solids, oils, phosphorus and nitrogen.  Dairy wastewater treatment begins with screening out coarse or heavy solids that could damage process pumps.  After passing through the screening equipment, wastewater is collected and blended together to form a homogenous solution.  This is called Equalization.  The wastewater is then chemically treated with a flocculant that helps agglomerate solid materials into large floatable flocs.  Water then flows to a Dissolved Air Flotation Unit (DAF) where the physical separation takes place into sludge and clarified water.  Clarified water flows out of the DAF unit onto further processing or for discharge.

Beyond the organic materials in dairy wastewater like milk solids, whey, and butterfat, significant volumes of cleaning products involved in sanitation are also found in plant effluent.  These chemical solutions cause varying wastewater pH and present process challenges when it comes time for treatment. Where many wastewater treatment applications follow a prescribed coagulation/flocculation process, dairy wastewater often requires a different approach that better accounts for the tendency of milk products to release noxious odors during equalization.

Every wastewater treatment application is unique.  It has its own set of variables that make having an experienced process designer an absolute necessity.  JWC Environmental’s wastewater process design team has worked on many dairy wastewater treatment applications.  With this wealth of experience we design treatment programs specifically to your project needs.  Whether supplying a single piece of equipment or delivering a turn-key solution, JWC’s IPEC rotary drum screens and FRC DAF Systems, the PCL Plate Pack, the PWL Open Tank or the PCCS Compact will meet your unique application’s needs.


  • Protect downstream process pumps from clogs and damage
  • Effectively remove TSS, FOG and other pollutants from wastewater
  • Enhance separation efficiency
  • Minimize odor during equalization

Typical Applications