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3D TRASAR
5500 - Installation & Operation Manual
4. What are the unique benefits of 3D Bio-Control?
3D TRASAR Bio-Control will consistently and automatically feed the correct dose of oxidizing
biocide at the correct time. Optimal dosage of oxidizing biocides has the following benefits:
• Cost savings
• Copper and mild steel corrosion is often significantly reduced compared to other modes of
control.
• Chlorine contribution from halogen based biocides is minimized. Therefore, impact on
stainless steel pitting and stress corrosion cracking is reduced.
• Delignification of wood used in construction of the cooling tower is minimized.
• Deleterious impact on scale and corrosion inhibitors is minimized.
• AOX (adsorbable organic halogen) generation is minimized.
• Optically-based detection of 3D TRASAR Bio-Control is much more reliable than ORP
probes, halogen analyzers and other halogen detectors.
• Since 3D TRASAR Bio-Control is measuring microbial activity on-line, real-time, it will
detect any condition that results in an increase in microbiological activity instantly and
communicate with users. Some examples include opening of dead legs, sour leaks,
ammonia leaks, make-up water contamination etc.
• It will detect the sloughing of biomasses from heat exchange surfaces and respond with
oxidizing biocide before it inoculates the system
• 3D TRASAR Bio-Control will detect situations where the oxidizing biocide tank is empty,
the pump is air-locked or biocide has decreased in potency and notify users.
• 3D TRASAR Bio-Control can document the level of bio-activity in the system and the
actions taken to control it, in accordance with Cooling Water Best Practices.
5. How effectively does 3D TRASAR Bio-Control manage microbial populations?
3D TRASAR Bio-Control responds to the total microbial activity in the system, the floaters
(planktonics) and the slime (sessile or biofilm, microbes attached to surfaces). The sessile popula-
tion constitutes >98% of the total microbial population and cause the problems associated with
microbial proliferation.
Planktonic counts measured by dipslides or DMAshould be between 10
3
- 10
5
cfu/ml. Since
3D TRASAR Bio-Control responds to the total system microbial activity, it does not necessarily feed
oxidizing biocide in response to the floating population measured by water samples and dip-slides.
Under 3D TRASAR Bio-Control, coupon swabs give population counts of 10
8
cfu/sq cm or less.
6. Is 3D TRASAR Bio-Control compatible with other components (Scale and
Corrosion inhibitors) of the cooling water treatment program?
3D TRASAR Bio-Control is completely compatible with the scale and corrosion inhibitor compo-
nents of the 3D TRASAR program. In fact, 3D TRASAR Bio-Control has a beneficial impact on
corrosion and scale inhibition.
