Organic microbiological-control actives for industrial water u2014 DBNPA, glutaraldehyde, benzalkonium chloride, and the isothiazolinones u2014 for cooling, membrane, and wastewater programs where an oxidizer alone will not hold.
Non-oxidizing biocides are organic microbicidal actives dosed into industrialnwater systems for microbiological control u2014 managing bacteria, fungi, and biofilm withoutnrelying on an oxidation reaction. Unlike chlorine or peroxide, they stay activenacross a wider pH band and are not consumed by ammonia or organic load, which is whyncooling-tower and membrane programs usually pair a non-oxidizer with an oxidizer rathernthan choosing one alone. The water-treatment workhorses are DBNPA, glutaraldehyde,nquaternary ammonium compounds, and the isothiazolinones.
nnNon-oxidizing actives are specified where an oxidizer will not hold: high-pH coolingnwater, systems with heavy organic load, and RO membranes that free chlorine would damage.nThe honest trade-off is cost and handling. Non-oxidizers run several times the per-dosencost of hypochlorite and many cannot share a feed line, so a program alternates twonchemistries rather than over-relying on one. Rotate actives on a defined schedule tonmanage slime regrowth and resistance.
nnDBNPA is the fast-release, short-half-life choice for slug dosing and membrane systems;nit hydrolyzes quickly, which limits residual carryover. Glutaraldehyde and the quatsn(benzalkonium chloride) are longer-lasting, broad-range actives common in cooling andnoilfield water, while the isothiazolinones (BIT, CMIT/MIT) are low-dose actives used innstored treatment chemistries. Match the active to system pH, contact time, and dischargenlimits rather than defaulting to one product line.
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