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Tenselo Tenselo Water Engineering Tools
Reverse Osmosis Design

Hit the water-quality target by design.

Filtration, disinfection, dosing and membrane / RO design sized to your feed water and your target. Built for treatment and process engineers.

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Water treatment in Tenselo

A short introduction to what Tenselo covers in this category.

A worked example

DuPont FilmTec BW30-400

8″ spiral-wound brackish · Codeline 80S vessels

These figures come from the Tenselo engine. Every result Tenselo produces shows the inputs it used and the method behind it, so the work can be checked rather than taken on trust.

Inputs
Permeate flow 20.0 m³/h
Feed TDS 660 mg/L
Operating hours 20 h/d
Recovery 75 %
Results
30
Elements
5
Pressure vessels
99.5 %
Salt rejection
22 LMH
Design flux
20 m³/h
Permeate
6.6 m
Vessel length

Why it matters on the job

Membrane array done right

Element count, vessels and flux matched to the feed water and recovery — named to real product.

Quality you can guarantee

Rejection, CT disinfection and LSI scaling all checked against the target.

Dosing that lands

Coagulant, antiscalant and disinfectant rates sized to flow and chemistry.

What is in this category

23 Water Treatment calculators

Every calculator in this category, by its reference code. Running them needs a Tenselo subscription — subscriptions open soon.

  • WTR-001 Calcite Contactor Sizing

    Re-mineralising/pH correction contactor: bed volume, calcite use and CO2 demand

  • WTR-002 Chloramine / Breakpoint Ratio

    Cl2:ammonia ratio, chlorination regime and dose for monochloramine or breakpoint

  • WTR-003 Reverse Osmosis Design

    Brackish RO skid - elements, vessels & length, array, skid size, HP pump, recovery, permeate TDS, scaling & energy

  • WTR-004 RO / Permeate Blending

    Bypass fraction to hit a target TDS or hardness

  • WTR-005 RO Performance & Mass Balance

    Recovery -> flows, reject TDS, salt passage, osmotic pressure

  • WTR-006 UF Design

    Ultrafiltration skid sizing - modules, flux, backwash, air scour, CEB chemicals, recovery & permeate quality

  • WTR-007 Chlorine Contact Tank Baffling (T10 / CT)

    Disinfection CT check from tank volume, flow & baffling (USEPA SWTR Giardia free chlorine)

  • WTR-008 Chlorine Residual Decay

    Free-chlorine residual after a contact/travel time (first-order decay) + re-dose

  • WTR-009 Ozone Water Treatment

    Ozone generator sizing & selection

  • WTR-010 UV Water Treatment

    UV disinfection reactor sizing & selection

  • WTR-011 Carbon Filter (Industrial GAC)

    Flow + duty -> EBCT, GAC vessel(s), carbon mass & backwash

  • WTR-012 Cartridge Filter Sizing

    Number of cartridges and housing size for a duty flow and micron rating

  • WTR-013 Coagulation / Flocculation

    Coagulant dose -> chemical feed (kg/day & solution L/day) + rapid-mix / floc G-value and G.t

  • WTR-014 Foam Fractionators

    Protein skimmer / foam fractionator sizing & selection

  • WTR-015 Iron Removal Filter (DMI-65)

    Fe/Mn/H2S + flow -> chlorine dose & pump, DMI-65 vessel(s), backwash

  • WTR-016 Degasser / Air Stripper (CO2 / H2S)

    Packed-tower air:water ratio, packing depth & diameter for stripping dissolved gas (screening / indicative)

  • WTR-017 Demineralisation / DI Sizing

    Two-bed cation+anion resin, regenerant & run length

  • WTR-018 Water Softener (Industrial)

    Hardness + flow -> resin, vessel(s), salt usage & regen frequency

  • WTR-019 Boiler Blowdown & Cycles

    Surface blowdown, make-up & heat loss from steam load + TDS

  • WTR-020 Cooling Tower Water Balance

    Evaporation, blowdown, make-up & cycles of concentration

  • WTR-021 Detention / Retention Time

    HRT, turnovers & disinfection contact time (T10, CT)

  • WTR-022 Drinking Water Analysis

    Source + water sample -> ADWG pass/fail + a decisive, minimum-viable treatment train

  • WTR-023 Heat Exchangers

    Heat duty + area sizing & selection (LMTD)

Subscriptions open soon

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