A word from ODYSSEE

Treated using conventional agents, this 1.3-million-gallon closed network ended up getting clogged.

The rollout of our ODYTHERM FS510P solution, combined with an appropriate treatment and operating methodology, was able to stabilize a network with substantial deviations, eliminating all of its issues.





District heating system with two boilers

Combined heat and power generation

Materials present

Steel, copper and stainless steel

Total volume

1.3 million gallons
Planned expansion: + 780,000 gallons

Generating capacity

> 150 MW

Make-up water 

Softened public water

Approx. 208,000 gallons/year

Client challenge

Treated conventionally, with a base of phosphate/sulfites, the networks ended up heavily clogged:

  • Magnetizable suspended matter + deposits
  • Significant signs of corrosion (iron): > 60 ppm
  • Difficulty maintaining stable parameters in the circuit (mineral conditioning with PO4/SO32, in particular)
  • Contaminated with sulfate-reducing bacteria (SRB).

Given the substantial deviations reported and the criticality of the circuit, the strategy in place needed to be reassessed.

An eco-friendly final solution was necessary.

ODYSSEE’s solution

  • Permanent stoppage of phosphate-based products
  • Gradual application of ODYTHERM FS510P, according to a switchover protocol designed in combination with in-line ODYNET/ODYCLEAR filters
  • ODYTHERM FS510P: a formula containing only organic active agents (film-forming amines)
  • Installation of a protective continuous monomolecular film mediating between the circuit’s components and the circulating liquid, to prevent corrosion
  • Improved heat transfers (clean surfaces)
  • Passivation of matter (pH 9-10)



Sharp drops in iron content, ending with values of < 0.05 ppm.

Suspended matter

Gradual clarification of water.

Bacterial contamination control

Disappearance of SRB – no recontamination (and no added biocide).