Tanks and sumps are some of the most biologically active areas in industrial water systems. Despite chemical treatment, these zones frequently become biofilm nurseries—protected environments where bacteria thrive, spread, and seed the rest of the system.
Low Flow = High Risk
Biofilm loves low-velocity conditions. Tanks and sumps often experience minimal turbulence, allowing microorganisms to settle, attach, and grow undisturbed. Once attached, bacteria produce extracellular polymers that form a protective matrix, shielding them from biocides.
Sediment and Nutrient Accumulation
Dirt, corrosion products, and organic matter naturally collect in tanks and sumps. These solids act as both a physical anchor and a nutrient source for microbes. Even well-treated systems can suffer biological outbreaks if solids removal is neglected.
Poor Biocide Distribution
Biocides are often injected downstream of tanks or only circulate briefly through sumps. As a result, bacteria in these areas may never see effective biocide concentrations. Over time, these protected colonies continually reseed the system.
Temperature Stratification
Warm zones within tanks—especially in process or reuse systems—create ideal growth conditions for bacteria, including sulfate-reducing and slime-forming organisms.
Why It Matters
Biofilm reduces heat transfer, accelerates under-deposit corrosion, increases microbiological fouling, and drives higher chemical consumption. Once established, biofilm dramatically increases the cost and difficulty of system control.
Preventing Biofilm Growth in Tanks and Sumps
Biofilm reduces heat transfer, accelerates under-deposit corrosion, increases microbiological fouling, and drives higher chemical consumption. Once established, biofilm dramatically increases the cost and difficulty of system control.