MEA Triazine Biocide for Paper & Pulp Mills

Paper and pulp mills operate large-volume water circuits that recirculate warm, nutrient-rich white water — an ideal environment for microbial proliferation. Bacteria, fungi, and algae form biofilms (slime) on paper machine surfaces including wires, felts, rolls, save-alls, and white water chests. These slime deposits periodically detach and enter the paper sheet, causing defects. The consequences of uncontrolled microbial growth in paper mills are significant: sheet breaks and holes from slime deposits reduce machine efficiency and increase broke; spots, specks, and odour complaints degrade product quality; biofilm-induced corrosion attacks machine components and piping; and clogged showers, nozzles, and felt conditioning systems require frequent maintenance shutdowns. In addition to wet-end systems, microbial contamination affects coating kitchens (starch and coating colour degradation), broke handling systems, and fresh water storage. A comprehensive biocide programme targeting multiple contamination points is essential for maintaining paper quality and machine runnability.

MEA Triazine 78% functions as a formaldehyde-releasing slimicide in paper mill applications. It hydrolyses in the aqueous white water environment to release formaldehyde at controlled concentrations, providing sustained antimicrobial activity against the full spectrum of slime-forming organisms — aerobic and anaerobic bacteria, fungi, and yeasts. A key advantage of MEA Triazine for paper mills is its effectiveness at low pH. Many paper machine wet-end systems operate at pH 4.5-7.0 (especially in acidic sizing systems), where some biocides lose activity. MEA Triazine maintains its antimicrobial performance across this pH range, making it versatile for both acid and neutral/alkaline papermaking conditions. The product is compatible with common paper mill wet-end chemistry including cationic and anionic retention aids, AKD and ASA sizing agents, wet-strength resins, starch, and defoamers. It does not cause foaming, does not interfere with retention or drainage, and does not affect paper sheet properties at recommended dosages.

MEA Triazine 78% is applied at multiple points in the paper mill to provide comprehensive microbial control: Wet-end treatment: Continuous dosing into the white water system at 50-200 ppm, targeting the short and long circulation loops. This is the primary application point for preventing slime deposition on the paper machine. Coating systems: Addition to coating colour and starch preparation systems at 100-300 ppm to prevent microbial degradation of starch and coating components. Bacterial degradation of starch causes viscosity loss and coating quality problems. Starch slurry preservation: Starch slurries held in storage tanks are particularly susceptible to bacterial fermentation. MEA Triazine at 200-500 ppm prevents degradation and maintains starch quality until use. Broke handling: Treatment of broke storage chests and repulping systems at 100-200 ppm to prevent microbial build-up in recycled fibre streams. Dosing is typically continuous via chemical metering pumps, with rates adjusted based on regular microbiological monitoring (dip slides, ATP testing, or deposit weight tests). Some mills also use periodic shock dosing during scheduled wash-ups to supplement continuous treatment.

MEA Triazine 78% offers several specific advantages for paper mill biocide treatment: Low-pH effectiveness: Unlike some biocides that lose activity below neutral pH, MEA Triazine performs well in acidic papermaking conditions (pH 4.5+). This makes it suitable for mills running acidic or transitional sizing systems. No foaming: The product does not generate foam, which is critical in paper machine wet-end applications where foam causes sheet defects and drainage problems. Compatibility: Fully compatible with retention aid systems, sizing chemicals, and other wet-end additives. No interference with Zeta potential, drainage, or retention performance. Sustained release: The formaldehyde-releasing mechanism provides extended antimicrobial protection between doses, reducing the frequency of shock treatments and the associated chemical consumption spikes. Cost-effective: As a direct manufacturer, Vasudev Chemo Pharma offers competitive pricing compared to branded slimicide products, with the same active chemistry and proven performance. We regularly export to paper mills in Vietnam, Thailand, Indonesia, and other paper-producing regions.