Question 1

What does industrial water treatment include?

Accepted Answer

Industrial water treatment covers pure water (RO, UPW, softening), cooling water (corrosion/scale control and biocide dosing in open-loop and closed-loop systems) and industrial wastewater (coagulation, biological treatment, heavy-metal removal), together with equipment, chemicals and consumables such as RO membranes, ion exchange resin, filter media and cartridges. Aqua-Link provides all three areas as a one-stop solution.

Question 2

How do I choose an RO antiscalant?

Accepted Answer

RO antiscalant selection depends on feed water quality (hardness, alkalinity, silica, iron/manganese, salinity), system recovery, membrane manufacturer compatibility and certification requirements such as NSF 60. Aqua-Link TRISPE® 1000 suits high hardness / high pH feed (NSF 60 certified), 1200 for seawater desalination, 4000 for phosphorus-free high-recovery, and SI001 for high-silica water.

Question 3

What chemicals are used for cooling tower water treatment?

Accepted Answer

Typical cooling tower chemicals include: 1) corrosion & scale inhibitors (phosphonate / polymer-based, or phosphorus-free formulations such as POLYTE® CW8904); 2) oxidising biocides (sodium hypochlorite, stabilised bromine, DBNPA); 3) non-oxidising biocides (isothiazolinones, quaternary ammonium compounds); 4) biodispersants and slime-release agents; 5) prefilm and cleaners. Selection considers metallurgy, water chemistry and concentration ratio.

Question 4

How often should RO membranes be replaced?

Accepted Answer

RO membrane lifespan is typically 3–5 years, depending on feed water quality, pretreatment effectiveness, operating conditions (temperature, pressure, recovery) and chemical dosing practices. Consider cleaning or replacement when permeate flow drops 10–15%, salt rejection declines noticeably, or differential pressure rises over 15%.

Question 5

What is PAM and how is it used in wastewater treatment?

Accepted Answer

PAM (polyacrylamide) is a high-molecular-weight polymer used as a flocculant. Anionic PAM (POLYTE® 4100 series) is used for sedimentation of positively charged suspended solids in power-plant, steel-mill, pulp-and-paper and petrochemical wastewater. Cationic PAM (POLYTE® 4200 series) is used for sludge dewatering of municipal and industrial sludge. Selection depends on charge, molecular weight and jar-test results.

Question 6

What water treatment consumables does Aqua-Link supply?

Accepted Answer

Aqua-Link supplies a full range of water treatment consumables, including RO membranes (Dow Filmtec, Hydranautics, Toray), UF and NF membranes; ion exchange resin (Rohm & Haas / Purolite / Mitsubishi — cation, anion, mixed bed); quartz sand, activated carbon, anthracite and manganese sand filter media; PP melt-blown and pleated cartridges, bag filters; dosing and metering pumps with instrumentation.

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