CoMag® System for Enhanced Primary or Tertiary Treatment

Proven to dramatically increase capacity performance and help to meet tightening regulations.

CoMag® System
The CoMag® System infuses magnetite as a weighing agent into conventional chemical floc, enhancing settling rates and increasing the performance of wastewater and water treatment facilities, while substantially reducing life-cycle costs. It's simple and reliable.

Primarily used to improve primary and/or tertiary treatment, the CoMag System easily integrates with planned or existing facilities, making it easier to solve today’s operational and environmental challenges. 


The CoMag System competes effectively with all forms of media and membrane filtration and conventional clarification, and is proven effective for:
  • Primary treatment (Chemically Enhanced Primary Treatment)
  • Tertiary treatment for polishing secondary effluent
  • Stormwater/CSO (combined sewer overflow)
  • Wet weather control
  • Recycle-reuse applications
  • Reverse Osmosis pretreatment
  • Drinking Water
  • Heavy Metals Removal

View this short video to see the CoMag® System in action! This quick and efficient tertiary treatment produces effluent quality nearly equivalent to ultrafiltration - at a fraction of the capital expense.   

The enhanced settling capabilities of the CoMag® System has been proven at municipal and industrial facilities to deliver the following results:

 SOR  up to 10x 
 SLR up to 20x 
 Turbidity < 1 NTU 
 TP < 0.05 mg/L 
 TSS < 2.0 mg/L 
 Color 2 Pt-Co Units 
 Fecal Coliform < 200 Col/100 mL 
 Copper <μg/L 
 Aluminum < 80 μg/L
 Arsenic <μg/L
 UV Transmittance > 75%
 Oil and Grease Removal         

Key Benefits of the CoMag System:

  • Superior Contaminant Removal - Efficiently reduce total suspended solids (TSS), total phosphorus (TP), turbidity, color, pathogens and metals far below conventional treatment.
  • Low Costs
    • High-rate, ballasted clarification allows for smaller reaction and solids separation tanks, minimal power consumption and moderate chemical use.
    • The CoMag System continuously recovers and reuses 99+% of the injected magnetite offering a sustainable process for lower OPEX.
  • Improved Productivity - The CoMag System minimizes the risk of upsets and handles a wide range of flows and loads — including peak flow events — with no backwashing, plugging or fouling, no media filters required and almost no effect on contaminant removal performance or operational stability.
  • Ultraviolet Enabling - The high transmissivity of the CoMag System effluent reduces energy and operating costs of final purification.

Please see the performance videos, case studies, FAQs on this page, or contact us today.

Contact Us

Robert Backman
Senior Technical Sales Manager
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View this short video to learn more about Magnetite Ballasted Treatment!

Product Documentation

CoMag® System Brochure
CoMag® System for Drinking Water Treatment
CoMag® System for Industrial Applications
BioMag / CoMag System Frequently Asked Questions

Case Studies
Concord, MA WWTP - A Low-Cost, 20-Year Solution to Ever-Tightening Phosphorus Limits
Sturbridge, MA POTW - Greater Capacity for High Flow Events, With Enhanced Clarification for New Regulations

Tighe and Bond Design Firm receives ACEC (American Council of Engineering Companies) Gold Award for implementation of BioMag and CoMag Systems in Sturbridge Project

Additional Information
BioMag® Systems for enhanced Secondary Treatments
FAQs Related to CoMag Systems
FAQs About Magnetite