Choosing the right biocide for your cooling system isn’t just about chemical compatibility—it’s about safeguarding your operation. An effective biocide program protects your equipment, supports regulatory compliance, and helps ensure a safe environment for workers and the public. At Watertech of America, we understand that successful microbial control begins with a full-picture approach.
Why Microbial Control Is Essential
Microbial growth in cooling systems can lead to biofilm buildup, corrosion, fouling, and even the spread of harmful pathogens such as Legionella. These risks are not just operational—they’re regulatory and reputational. The types of microorganisms present in your system are directly shaped by environmental factors including:
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Source and composition of feedwater
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System operating temperature
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Material of construction
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Sterilization protocols
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Proximity to contaminant sources
Each of these elements plays a role in determining which biocide will be most effective for your specific application.
Real-World Example: Solving Downtime in a Dairy Operation
One Watertech customer—a dairy processor using condensate of whey (COW) water for cooling system makeup—was experiencing 1–2 shutdowns per year due to biological fouling. At first glance, the nutrient-rich COW water seemed the likely culprit for the recurring biofilm issues.
But Watertech’s team took a deeper look.
The Problem
Our site assessment revealed that while the COW water contributed to microbial growth, the real driver was an adjacent lactose dryer. The dryer was releasing airborne sugars that entered the cooling tower, creating a nutrient-rich environment for biofilm formation.
The Solution
We developed a targeted treatment strategy using chlorine dioxide to oxidize the system makeup water and penetrate existing biofilms. Within weeks, the system stabilized. The result? Zero shutdowns for over a year, lower maintenance costs, and increased production uptime.
Steps to Selecting the Right Biocide
Watertech follows a proven protocol to ensure your system receives the best treatment:
- Analyze the Environment – Start with a detailed site inspection. We examine everything from equipment layout to water flow dynamics and external environmental influences.
- Conduct Targeted Testing – We perform laboratory and on-site tests to detect:
• Iron and sulfate levels
• Microbial species present
• Nutrient loads
• Existing contamination in bulk water
- Match Chemistry to Conditions – Based on your system’s profile, we select a biocide with the appropriate mode of action—oxidizing or non-oxidizing—and application strategy. We also account for compatibility with other water treatment chemicals and system materials.
- Implement and Monitor – Once the treatment program is in place, the system requires a stabilization period. Afterward, additional testing ensures the biocide is performing as intended. Adjustments are made as necessary to optimize performance.
Benefits of the Right Biocide Program
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Reduced Downtime: Minimize costly shutdowns and unscheduled maintenance.
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Improved Safety: Control harmful pathogens and protect public health.
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Increased Efficiency: Enhance heat transfer and lower energy usage.
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Regulatory Compliance: Stay ahead of EPA and local guidelines on chemical use.
Partnering with Watertech
Selecting a biocide isn’t just a product decision—it’s a strategic move. At Watertech, we partner with you to develop comprehensive, intelligent water management plans that drive results. Our team combines technical expertise, advanced monitoring, and hands-on service to ensure your cooling water system operates at its peak. Are you using the most effective biocide for your facility? Request a site assessment with a Watertech expert and take the first step toward safer, more efficient water management.
