Episode
471 Biofilms, Biocides, and TTPC: A Deep Dive with Dr. Jeff Kramer
- Podcast
- Scaling UP! H2O
- Published
- Apr 10, 2026
- Duration seconds
- 3395
- Processing state
not_requested
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Summary
Biofilm is not a fringe issue in cooling systems. As Dr. Jeff Kramer explains, it is a given. That matters because biofilm affects heat transfer, contributes to corrosion, and can serve as a reservoir for Legionella in treated systems. In this conversation, Trace Blackmore and Dr. Kramer examine what experienced water treaters should be looking for when choosing and evaluating a microbiological control program. Biofilm as an operating problem Dr. Jeff defines biofilm as a community of microorganisms attached to a surface and held together by an external polymeric matrix. From there, the discussion moves quickly into why these matter in the field. He points to research showing that biofilms can be more insulating than mineral scale, then explains how microbial activity and patchy film formation can intensify corrosion risk. He also notes that Legionella can be harbored within biofilm, making clean-looking bulk water an incomplete picture of system condition. Choosing the right biocide program A strong oxidizing biocide foundation remains central, whether based on chlorine or bromine. However, Dr. Jeff makes a practical distinction that matters to service professionals: some non-oxidizing biocides kill biofilm organisms without removing the film, while others both kill and remove. He also explains why shock dosing often outperforms smaller, more frequent additions, and why biocide timing should be evaluated in the context of oxidizer compatibility, halogen demand, and actual system feedback rather than habit or opinion. Surfactants, TTPC, and field realities The conversation also covers how surfactants and quaternary compounds can disrupt microbial membranes and improve biocide penetration. Dr. Jeff shares lab and field insight on TTPC, including its strong performance i…