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For several years, a U.S. Gulf Coast gas plant had high levels of natural gas in its cooling tower make-up water, creating high demand for biocides and prolific biofouling throughout the system.

The microbiological fouling of the cooling tower’s high-efficiency fill and key-heat exchangers was so severe the plant was forced to limit production flow rates, particularly during hotter summer months.

The plant operator had tried many combinations of oxidizing biocides and non-oxidizing biocides, as well as hydrogen peroxide, in an attempt to regain control of the biological proliferation.

Plant personnel contacted Baker Hughes, a GE company (BHGE), for help in solving the microbiological problem. BHGE Operations and Engineering teams studied the problem and concluded that BioKlenz™ biofilm control services was the only viable solution to the problem.

Download the PDF to read the full case study.

Challenges & Results


  • High levels of natural gas in the cooling tower make-up water created high demand for biocides and prolific biofouling throughout the system
  • Cooling water was turbid from biogrowth in the system
  • Tower water was constantly foaming due to the reaction products of chlorine and biomass


  • ClO2 demand dropped from more than 0.5 ppm down to almost zero in four weeks
  • Cooling water turbidity dropped to 4 NTU in eight weeks as the system cleaned up
  • Production flow rates— once at risk—remained on schedule through heat of summer months