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QHow does temperature affect flux and salt rejection?
AHigher temperature increases flux (lower viscosity) but reduces salt rejection and accelerates aging. Always operate within specified temperature limits.
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QWhat is the difference between “cleaning” and “disinfection” in RO systems?
A
Cleaning removes foulants using acid/alkali/surfactant cycles.Disinfection controls microbial growth throughout the system, including piping and tanks.
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QCan overdosed or incompatible antiscalants cause fouling?
A
Yes. Improper antiscalant dosing or incompatibility can create precipitates and deposits on the membrane surface.
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QWhat are the common types and causes of membrane fouling?
A
Fouling arises from suspended solids, inorganic scaling (CaCO₃, CaSO₄), organics, colloids, and microbial growth.
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QWhich feed-water substances are harmful to RO membranes?
A
Free chlorine, incompatible detergents, cationic surfactants, and strong oxidants (ozone, peroxide) can degrade membrane material.
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QWhat is the maximum allowed SDI (Silt Density Index) for RO feed water?
A
RO membrane manufacturers require SDI ≤ 3 to prevent fouling and protect membrane life.
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QHow can I request service or a performance evaluation?
A
Requests can be submitted via the Support & Download section of the Deepflow website or by email at service@deepfloweco.com.The technical team provides performance analyses, cleaning recommendations, and process optimization.
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QCan Seltra systems be combined with Aevya evaporators to achieve ZLD?
A
Yes. Seltra membranes can recover up to 90 – 95 % of water, reducing the load sent to evaporation.Combined with Aevya, they enable true Zero Liquid Discharge with minimal energy use.
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QWhat kind of pretreatment is recommended before reverse osmosis?
A
RaeX units for flocculation and solids removal, followed by ultrafiltration or microfiltration, are strongly recommended.Proper pretreatment is essential to prevent scaling and fouling on RO membranes.
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QCan individual membranes be replaced without changing the entire module?
A
Yes. All Seltra systems are modular and allow replacement of single elements without dismantling the full skid, reducing downtime and maintenance cost.
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QHow long does a Seltra membrane last?
A
The average service life is 8 – 10 years, depending on feed composition and pretreatment quality.Upstream RaeX systems significantly extend membrane lifetime.
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QHow is membrane cleaning managed?
A
Seltra systems include automatic CIP programs with configurable acid, alkaline, and rinse cycles.The frequency depends on the organic load and feed water quality; automation signals cleaning needs based on differential pressure trends.
