Choose & Compare — Water Treatment
Grade, material and specification decisions side by side.
9 answers
- Antiscalants and Phosphonates — Choosing the Right Threshold InhibitorAntiscalants work at sub-stoichiometric dose: 2–10 mg/L holds hundreds of mg/L of scale-forming ions in solution by distorting crystal growth. The selection driver is which scale you are fighting and whether the system carries chlorine. HEDP gives strong…
- Water Treatment Coagulant Selection Guide — Alum, PAC, Ferric and PolymerCoagulant choice is decided by raw water alkalinity, temperature and the sludge you are willing to handle — not by price per tonne. Aluminium sulphate (alum) is the cheapest per kilogram but consumes about 0.5 mg/L of alkalinity as CaCO₃ for every 1 mg/L…
- Industrial Chlorination and Disinfection — Dose, Contact Time and ResidualDisinfection is not a dose, it is a CT product: concentration of free residual multiplied by contact time. A plant achieving 0.5 mg/L free chlorine for 40 minutes delivers the same CT as 1.0 mg/L for 20 minutes, and both fail if short circuiting in the…
- Oxidising vs Non-Oxidising Biocides — When Each One WinsOxidising biocides kill fast, cheaply and indiscriminately; non-oxidising biocides penetrate biofilm and survive conditions that destroy an oxidant. A working cooling programme uses both: a continuous or shock oxidant to hold the bulk water, plus a…
- Reverse Osmosis Chemical Programme — Pretreatment, Antiscalant, CIPAn RO programme is four chemicals doing four jobs in sequence: dechlorination to protect the membrane, antiscalant to raise recovery, occasional pH adjustment, and clean-in-place to recover what fouled anyway. Polyamide membranes tolerate a lifetime…
- Coagulant Dose Calculator — Validated mg/L to Product QuantityConvert a dose you have already validated into an active chemical requirement, an as-supplied product requirement and a purchase quantity per day, week or month. Arithmetic only — the calculator never determines the correct treatment dose.
- Cooling Tower Cycles and Blowdown Calculator — Water Balance ArithmeticWork the evaporative cooling water balance from your own operating data: evaporation, blowdown, drift, makeup and cycles of concentration, with every equation and assumption shown. A planning calculation, not an operating setpoint.
- Filter and Adsorbent Media Selection by Target ContaminantMatch a treatment objective to the media family that can actually address it — depth filtration, adsorption, ion exchange or oxidation-filtration — with the selection factors, watch-outs and the verification each one requires before specification.
- Comparing Water Treatment Chemical Quotes — Strength, Grade and DocumentsTwo quotes at the same price per kilogram are rarely the same purchase. How active content, basis, density and grade change the real cost, and which documents to request — TDS, SDS, CoA, certification listings — before you buy or dose.
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