MEMBRANE CHEMICAL SOLUTIONS
FOR OPTIMAL SYSTEM PERFORMANCE
Kurita’s Avista™ range of membrane treatment chemicals is formulated to reduce operational costs, increase plant productivity, and maximise membrane life cycle. These advanced formulations are used to optimise the performance and reliability of UF, NF and RO systems in demanding industrial and municipal applications.
Our range includes Vitec™ antiscalants, RoClean™ membrane cleaners, RoQuest™ coagulants, and system-compatible biocides, each developed to address specific challenges such as scaling, fouling, and biofilm formation, while supporting consistent system recovery.
Trusted by OEMs and plant operators worldwide, Avista™ products are trusted for their effectiveness, performance consistency, and role in extending membrane lifespan while keeping systems running optimally.
ANTI-SCALANTS
Vitec antiscalants and dispersants are multicomponent formulations that enable higher recovery rates in RO systems, reduce cleaning frequency, and prevent system failures. The Vitec antiscalants inhibit scale while also dispersing colloidal particles. The inhibition and dispersant properties of Vitec products help extend system run times, reduce cleaning frequency and increase the productive life of RO elements. The Vitec 8000 series antiscalants, part of the Green Chemicals line, have been specially formulated for sites with discharge restrictions.
MUNICIPAL OR POTABLE DRINKING WATER
Vitec® 1400 is a wide-spectrum liquid antiscalant designed to inhibit calcium carbonate, calcium sulfate, metal oxides, silica, barium and strontium scale in municipal feedwaters where there is potential for high concentrations of inorganic fouling or high hardness groundwater.
WIDE SPECTRUM INHIBITORS
Vitec® 3000 is a powerful, broad-spectrum, liquid antiscalant and dispersant that is compatible with organic coagulants. It is highly effective at low dose rates and in a wide range of feedwaters and is certified for use in systems producing drinking water.
INHIBITORS WITH SPECIAL FEATURES
Vitec® 4000 is a liquid antiscalant and dispersant that offers excellent silica scale inhibition, enabling increased system recoveries in high-silica feedwaters. It is certified for use in systems producing drinking water.
Vitec® 7000 is a multicomponent liquid antiscalant and dispersant that provides a high level of sulfate inhibition, enabling increased RO system recoveries in challenging waters.
Vitec® 7200 is a liquid antiscalant and dispersant that is especially effective calcium sulfate scale inhibitor, allowing up to 6 times saturation, and it is also an effective silica dispersant.
NON-PHOSPHORUS
Vitec® 8200 liquid antiscalant and dispersant is free of phosphate and phosphonate. This all-polymer blend is compatible with all membrane types and is NSF certified for use in systems producing drinking water.
CLEANERS
AvistaClean® and RoClean formulations are proprietary, membrane-compatible cleaners that provide efficient and cost-effective removal of all common foulants. AvistaClean® and RoClean products are available in a range of pH levels and are offered in both liquid and powder forms. Many are certified for use in potable water systems. They’re powerful against organic and inorganic foulants and compatible with all membranes. Several cleaners are classified as Green Chemicals to help Avista customers meet strict environmental discharge limits. The cleaners in our Green Chemicals line are the highest-performing green cleaners in the industry.
POWDER PRODUCTS
RoClean P192 powder is a multicomponent, high-pH buffered cleaner formulated to remove stubborn biological fouling, polysaccharide layers, clays, silica scale, silica complexes, and carbon fines. This cleaner is successfully applied to systems operating on seawater, brackish water and wastewater. RoClean P192 disperses silica compounds (i.e., silica scale) on the membrane surface and reduces high differential pressure caused by severe biological, organic or particulate foulants.
RoClean P303 powder is a multicomponent, low-pH buffered cleaner formulated to remove metal foulants and calcium carbonate from membranes.
BIOCIDES
The Kuriverter® IK series features an advanced, patented solution for biofilm control, engineered to effectively penetrate membrane surfaces and eliminate fouling, while also preventing regrowth. These innovative products can be injected directly into operating systems, eliminating the need for shutdowns during treatment. This online cleaning capability helps reduce operating expenses by minimising downtime, manual cleaning requirements, and the use of water and chemicals typically associated with traditional cleaning cycles.
BIOCIDE PRODUCTS
Kuriverter™ IK-110 is a stabilised chlorine-based liquid designed to control slime and biofilm formation. It works by disrupting microbial respiration and can gradually break down existing biofilm in RO systems through a “peeling off” action. Suitable for continuous or intermittent dosing, IK-110 is safe for polyamide membranes and can often replace upstream chlorine or chloramine dosing, eliminating the need for bisulfite removal.
Kuriverter® IK-220 is a patented liquid slime control solution formulated with stabilised chlorine, ideal for systems affected by dense or persistent biofilm. It works by disrupting the respiratory activity of bacteria and fungi and can be used continuously for prevention or intermittently to penetrate and gradually remove existing biofilm. Safe for polyamide membranes, IK-220 can also be applied upstream of RO pretreatment, reducing the need for traditional chlorine/chloramine dosing and bisulfite neutralisation. Proven effective across seawater, wastewater, and brackish water applications.
COAGULANTS
Colloids and silt fouling are significant causes of performance loss in membrane systems, which is why many system designs include upstream MMF to target particle removal. RoQuest® membrane-compatible coagulants improve the efficiency of MMF equipment by increasing particulate removal and providing higher-quality feedwater to downstream membrane systems. In addition to MMF products, Avista can also offer lab services, analytical tools, field services and chemical application recommendations to keep MMF equipment in top form.
COAGULANT PRODUCTS
RoQuest® 3000 liquid coagulant contains a proprietary blend of organic polymers to significantly improve multimedia filter efficiency and is compatible with all RO membranes.
TREATING CHALLENGING FEEDWATER?
We’ll help you select the right Avista™ chemicals for your membrane system and ensure compatibility from day one.
