Outils de génie de l’eau
Calculateurs de précision, bilans massiques membranaires et modèles de projection chimique pour ingénieurs procédés et spécialistes du dessalement.
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Engineering Workflows
Analyse des systèmes d’osmose inverse
Suivez un système membranaire de l’eau d’alimentation à la revue de conception, calcul après calcul.
- Eau d’alimentation Source et qualité de l’eau
- 1 Récupération Perméat vs concentrat
- 2 Bilan massique Sels et débits membranaire
- 3 Perméat / Concentrat Qualité et charge du concentrat
- 4 Pression osmotique Vérification de la pression motrice nette
- 5 Risque d’entartrage Tendance LSI / S&DSI
- 6 Revue de conception Explorer les scénarios d’étages
Outils en vedette
Calculateur de récupération RO
Calculez les débits de perméat et de concentrat à partir du débit d’alimentation et du taux de récupération.
Recovery (%) = (Permeate Flow / Feed Flow) × 100 Calculateur de rejet du sel
Calculez le taux de rejet du sel à partir des concentrations en TDS de l’alimentation et du perméat.
Rejection (%) = (1 - (Cp / Cf)) × 100 Calculateur de TDS du perméat
Prévoyez les matières dissoutes du perméat selon la salinité d’alimentation et les spécifications de rejet.
Cp = Cf × (1 - R / 100) Disciplines du génie de l’eau
Osmose inverse (RO)
Récupération membranaire, bilan massique, rejet du sel et qualité du perméat.
Explorer les outils →Dessalement
Énergie, récupération et dimensionnement du dessalement thermique et membranaire.
Explorer les outils →Traitement de l’eau
Coagulation, filtration, adoucissement et dosage chimique.
Explorer les outils →Qualité de l’eau
Indice de Langelier (LSI), conversion TDS et conductivité.
Explorer les outils →Hydraulique
Pertes de charge, pompes, Darcy-Weisbach et Hazen-Williams.
Explorer les outils →Ressources en eau
Apports des bassins, ruissellement et stockage.
Explorer les outils →Plumbing & Water Supply
Drainage fixture units, supply demand, septic tanks, rainwater harvesting and sump pumps.
Explorer les outils →Environmental Water Management
Greywater reuse, irrigation demand, infiltration trenches, soakaways and bioswales.
Explorer les outils →Tous les outils du génie de l’eau
58 outilsCalculateur de récupération RO
Calculez les débits de perméat et de concentrat à partir du débit d’alimentation et du taux de récupération.
Recovery (%) = (Permeate Flow / Feed Flow) × 100 Calculateur de rejet du sel
Calculez le taux de rejet du sel à partir des concentrations en TDS de l’alimentation et du perméat.
Rejection (%) = (1 - (Cp / Cf)) × 100 Calculateur de passage du sel
Déterminez le passage du sel à travers les membranes et vérifiez le bilan de rejet complémentaire.
Passage (%) = (Cp / Cf) × 100 Calculateur de TDS du perméat
Prévoyez les matières dissoutes du perméat selon la salinité d’alimentation et les spécifications de rejet.
Cp = Cf × (1 - R / 100) Calculateur de débit de concentrat
Calculez les débits de saumure et les bilans volumiques pour l’évacuation ou la conception ZLD.
Qc = Qf - Qp = Qf × (1 - Y / 100) Calculateur de pression osmotique
Estimez la pression osmotique d’alimentation par un modèle de van ’t Hoff simplifié (TDS, température, solutés).
π = i × C × R × T Studio de conception RO
Élaborez une conception préliminaire : alimentation, étages, membranes, éléments, bilans et avertissements.
Q = A × S × (ΔP − Δπ) Calculateur de bilan massique RO
Bilan simplifié des solides dissous : débits et qualité de l’alimentation, du perméat et du concentrat.
Qf · Cf = Qp · Cp + Qc · Cc Analyse du risque d’entartrage
Évaluez le risque d’entartrage CaCO₃ par l’indice de Langelier (ASTM D3739) et l’indice de Stiff & Davis pour eaux saumâtres et eau de mer.
LSI = pH − pHS · S&DSI = pH − pCa − pAlk − K Calculateur d’énergie spécifique
Déterminez la consommation spécifique d’énergie (kWh/m³) selon la pression et le rendement de pompage, avec économies optionnelles par récupérateur d’énergie.
SEC = Q_f × P / (36 × η_p × Q_p) · P_h = Q_f × P / 36 · P_erd = Q_b × P × η_erd Calculateur de coûts d’exploitation (OPEX)
Estimez les OPEX : énergie de pompage, nettoyage chimique, antitartres et remplacement des membranes.
SEC = P_feed × Q_f/(η_pump·Q_p) · OPEX = Σ (energy + chemical + membrane + maintenance) RO Performance & Troubleshooting Analyzer
Compare a current measured RO run against its commissioning baseline: permeate flow normalized to 25 °C and baseline net driving pressure (ASTM D4516-style), salt passage, pressure drop, flux and specific flux — with directional, verify-in-the-field diagnostics.
Qn = Qm × (TCF_ref/TCF_use) × (NDP_ref/NDP_use) with TCF ≈ 1.03^(T−25) and NDP = P_feed,avg − P_perm − (π_feed − π_perm) Plant Mass Balance
Assemble the whole plant as an ordered chain of unit operations: raw intake to product and waste, stage-to-stage product flow, external make-up, derived concentrate TDS by salt conservation, and plant-wide water and salt balance checks.
product = feed × recovery/100 · waste = feed − product · Cw = (Qf·Cf − Qp·Cp)/Qw · intake + make-up = plant product + plant waste Water Analysis & Treatment Selection
Enter a feedwater analysis once: derive hardness, cation–anion charge balance, TDS by summation, ionic strength and saturation indices (LSI/RSI), then compare water-quality drivers against the treatment surfaces already built on the platform — a qualitative start, not a diagnosis.
hardness = 2.497·Ca + 4.118·Mg · balance% = 200·(Σmeq+ − Σmeq−)/(Σmeq+ + Σmeq−) · LSI/RSI via existing saturation engine Small & Modular Desalination Sizing
Size a small or modular desalination plant from a demand basis forward: community population to product flow, then feed and concentrate by the plant mass balance, then membrane area, vessels and staging. Composes engines that already exist; chooses no recovery, staging ratio, flux or package envelope.
No new formula: composes calculateWaterDemand → analyzePlantMassBalance → buildRoArray → buildModularPackageScope. Feed = product ÷ recovery; area = permeate ÷ design flux; vessels = area ÷ element area × elements per vessel. Filter Sizing Calculator
Size a conventional rapid-gravity multimedia filter from design flow, filtration rate, bed depth and media effective size: required filter area, design area after the engineer's safety factor, and media volume. The unit count needs a stated catalogue unit area, and no clean-water head loss is invented.
A = Q/v · design area = A × safety factor · units = ceil(design area / unit area) only when a catalogue unit area is supplied · media volume = design area × depth · no head loss is computed Cartridge Filter Sizing Calculator
Size cartridge and bag filter elements and housings from design flow, feed solids and the manufacturer's element flow rating: hourly solids load, element count and housing count. No element size is assumed and no differential pressure is invented.
solids load (g/h) = Q × feed solids · elements = ceil(Q / element flow rating) × safety factor · housings = ceil(elements / elements per housing) · no differential pressure is computed Disinfection CT Value Calculator
Compute the achieved CT value from residual disinfectant concentration and contact time, compare it against a required CT you state from your disinfection reference, and get the contact time the design needs to reach it.
CT = residual concentration × contact time · margin = (achieved − required) / required · contact time needed = required CT / residual · no required CT and no UV dose are built in Ultrafiltration (UF) Membrane Engineering
Size UF membrane area from permeate flow and design flux, compute transmembrane pressure from the feed/filtrate/concentrate pressures, and read normalised flux against the reference condition to expose fouling.
A = Qp/flux · TMP = Pf − (Pfilt + Pc)/2 · normalised flux against reference temperature Nanofiltration (NF) Membrane Engineering
Close the NF water and solute balance from a stated recovery and rejection to get permeate and concentrate flow and TDS, then size membrane area from the permeate flux.
Qp = Qf·Y · Qc = Qf − Qp · solute balance Qf·Cf = Qp·Cp + Qc·Cc · A = Qp/flux Ion Exchange (IX / IER) Bed Sizing
Size an ion exchange bed from service flow, resin volume and empty-bed contact time, and compute stoichiometric regenerant demand from the ionic loading.
V = Q·EBCT · service flow = Q/A · regenerant mass from stoichiometric ionic loading Calculateur de facteur de concentration
Calculez le facteur de concentration et la charge saline du concentrat pour l’entartrage et l’évacuation.
CF = 1 / (1 − Y) · Salt Load = Q_f × C_f × Y_loading Calculateur de pression d’alimentation
Estimez la pression d’alimentation requise et l’énergie spécifique, avec récupération d’énergie en option.
P_feed ≈ Δπ + (J × 100/B·SCP factor) + ΔP_friction Calculateur de dosage d’antitartre
Calculez le débit de dosage d’antitartre et l’équivalent 100 % actif à partir de la concentration et du produit.
Dose Flow = Q_feed × Dose_ppm / (C_prod × 100) (SG-adjusted) Calculateur d’éléments et tubes
Calculez le nombre d’éléments et de tubes de pression à partir du débit de perméat, du flux de projet et de la surface.
Elements = Q_p / (Flux × A_element) · Vessels = ⌈Elements / Elements per Vessel⌉ Desalination Plant Designer
Compose a whole desalination plant as an ordered chain of unit operations from raw intake to product and waste: design basis, stage recoveries and make-up, whole-plant water and salt balance checks, and concentrate TDS derived by salt conservation — every value labelled input, derived or missing.
plant recovery = final product / raw intake · stage product = feed × recovery/100 · concentrate TDS: Qw·Cw = Qf·Cf − Qp·Cp · membrane product TDS: Cp = Cf × (1 − R/100) Calculateur de puissance de pompage
Calculez les puissances hydraulique, à l’arbre et électrique à partir de la hauteur et du débit.
HPump = ρ × g × Q × H / η Convertisseur d’unités et qualité d’eau
Convertissez débits et concentrations (mg/L ↔ ppm).
Canonical flow unit = m³/day · 1 mg/L ≈ 1 ppm (dilute aqueous) Calculateur d’écoulement en conduite
Déterminez vitesse, pertes de charge et chute de pression (Darcy-Weisbach ou Hazen-Williams).
v = Q / A · hf = 10.67 × L × Q^1.852 / (C^1.852 × D^4.871) Calculateur d’écoulement à surface libre (Manning)
Calculez vitesse et débit par l’équation de Manning pour canaux trapézoïdaux, rectangulaires et circulaires.
v = (1/n) × R^(2/3) × S^(1/2) · Q = v × A Calculateur de dimensionnement de conduites
Dimensionnez une conduite pour un débit cible dans une plage de vitesses recommandée, ou vérifiez la vitesse.
D = √(4Q / (π·v)) · v = Q / A Calculateur de Reynolds et régime
Calculez le nombre de Reynolds et classifiez le régime (laminaire / transitoire / turbulent).
Re = ρ·v·D / μ Calculateur de perte de charge (Darcy-Weisbach)
Calculez les pertes de charge par Darcy-Weisbach avec le coefficient de Colebrook.
hf = f × (L/D) × (v²/2g) · f via Colebrook-White Calculateur de hauteur manométrique totale
Composez la HMT : hauteur statique, pertes régulières et singulières, pression résiduelle.
TDH = H_stat + h_friction + h_minor + h_residual Convertisseur de pression et hauteur
Convertissez bar, kPa, MPa, psi, mH₂O, ftH₂O et atmosphères.
1 bar = 100 kPa = 14.5038 psi = 10.197 m H₂O Convertisseur débit volumique/massique
Convertissez les débits volumiques et massiques via la masse volumique du fluide.
ṁ = ρ × Q · Q = ṁ / ρ Water Quality Saturation Indices (LSI & RSI)
Evaluate calcium carbonate stability of a water with the Langelier Saturation Index (LSI) and Ryznar Stability Index (RSI) from pH, temperature, TDS, calcium, and alkalinity.
pH_s = 9.3 + A + B − C − D · LSI = pH − pH_s · RSI = 2·pH_s − pH Calculateur de stockage en réservoir
Dimensionnez les réservoirs cylindriques et rectangulaires (dimensions, demande, temps de séjour).
V = π/4 × D² × H · V = L × W × H Calculateur de demande en eau
Estimez la demande en eau et le débit de projet pour l’alimentation et le stockage.
Q_design = P · q · peakFactor · Q_avg = V_daily / 86400 Calculateur de temps de remplissage
Calculez le temps de remplissage d’un réservoir ou le débit requis pour un délai cible.
t = V / Q · Q = V / t Sodium Metabisulphite Dosing Calculator
Dose sodium metabisulphite from the chlorine residual it must neutralise or the sulphite level it must hold, using the stoichiometric ratio and your product strength. No chlorine residual and no product strength are assumed.
SMBS = Cl₂ demand × 190.12/70.90 (1 mol each), or sulphite target ÷ 2 (1 mol SMBS yields 2 mol SO₃²⁻) · product mass = active ÷ the certificate assay when one is given, else ÷ nominal strength — the assay replaces the strength, never both · no finished pH is predicted Coagulant Dosing Calculator
Turn a jar-test coagulant dose into active metal and product mass per day, from the dose basis you measured and the product active content. The dose is your jar test and the pH outcome is not predicted.
active metal (kg/h) = Q × dose ÷ 1000 · product (kg/day) = active ÷ active content · safety factor applies to both so they cannot disagree · no pH is predicted Clarifier Sizing Calculator
Size a circular or rectangular clarifier from the surface overflow rate, then check it against the solids loading when you state both. Reports which criterion governs and never predicts a solids removal.
area = Q ÷ SOR · load-based area = (Q × 24 × SS × removal%) ÷ (1000 × capacity) · governing criterion is reported · detention time is a consequence, not a criterion Activated Sludge Sizing Calculator
Size an aeration basin from the applied COD load, the F/M loading and the MLVSS, then audit your stated SRT, HRT and volume against each other. Reports oxygen demand as demand only, never as air flow.
load = Q × S₀ ÷ 1000 · V = load ÷ (F/M × X) on the APPLIED load · Px = Yobs × load removed · θc = VX ÷ Px · wasting = inventory ÷ θc · O₂ = 8/7 × COD removed, +4.57 per kg NH₄-N removed · air flow is not calculated GAC Contactor Sizing Calculator
Size a granular activated carbon bed from the empty bed contact time you selected, giving the bed volume, media mass and backwash shell volume. Breakthrough and contaminant removal are not predicted.
bed volume = Q × EBCT ÷ 60 · media mass = bed volume × bulk density · backwash shell = bed volume × (1 + expansion) · breakthrough and removal are NOT predicted UV Disinfection Sizing Calculator
Size a UV reactor bank from the required dose and design flow, then count parallel reactors against the out-of-service allowance. The ideal power is stated separately from the validated reactor power.
required power = Q × dose (1 mJ/cm² over 1 m³/h is 1 W) · reactors = ceil(required ÷ (module power × duty factor)) · annual energy is nameplate × availability CIP Tank Sizing Calculator
Size CIP cleaning and storage tanks from your cleaning protocol volume per element and the heel the tank retains, with separate alkaline, acid and neutral volumes and optional annual chemical consumption.
cleaning volume = elements × protocol volume per element · tank volume = cleaning volume ÷ (1 − heel) because the heel is retained · annual chemical = mass × cleanings per year Brine Volume and Mass Calculator
Annualise the brine volume and salt mass from the concentrate stream, with optional disposal cost and the dilution arithmetic against a stated permit limit. No compliance verdict is issued.
annual volume = brine flow × operating hours · salt mass = TDS × volume ÷ 1e6 to tonnes · dilution = Q × (C − limit) ÷ limit · no compliance verdict is issued Drainage Fixture Unit Calculator
Total drainage fixture units and the minimum building drain from fixture counts under the IPC or UPC tables.
Total DFU = sum(n x DFU) ; building drain from the code sizing table Water Supply Fixture Unit Calculator
Total water supply fixture units converted to an estimated peak demand in gallons per minute and a typical service size.
Total WSFU = sum(n x WSFU) ; peak demand interpolated from the Hunter flush-tank curve Septic Tank Sizing Calculator
Septic tank volume and standard size from residents, daily flow, retention time and the sediment storage allowance.
V = n x q x (t/24) x sediment factor Rainwater Harvesting Calculator
Annual and monthly rainwater yield from a roof, with a cistern size derived from a daily demand and autonomy period.
V_year = A x (P/1000) x C x efficiency Sump Pump Sizing Calculator
Inflow to a sump from the drainage area and design rainfall, with the safety-factored pump capacity and hydraulic power.
Q = A x (i/1000) x C / 3600 ; P = rho g Q H / eta Greywater Reuse Calculator
Reusable greywater available per day and the storage volume needed, from residents, laundry flow and the captured fraction.
Q_reuse = (n x q_person + q_laundry) x capture fraction Irrigation Demand Calculator
Daily and weekly irrigation water requirement from reference evapotranspiration, crop factor and system efficiency.
V = A x (ET0 x Kc) / (1000 x efficiency) Infiltration Trench Calculator
Length and drain time of an infiltration trench from the stored runoff volume, void ratio and soil infiltration rate.
V = A x P x C ; V_trench = V / void ratio ; t = V / (k x base area) Soakaway Calculator
Soakaway storage and base area from a percolation test result, the drainage area and the design storm.
k = 1000 / percolation time ; V = A x P x C ; A_base = V / depth Bioswale Calculator
Trapezoidal bioswale geometry, storage volume, media void storage and drawdown time for a given infiltration rate.
A = (b + z d) d ; V = A L ; t = V / (k P L) Connaissances et ressources
Guides techniques
Stockage aquifère, filtration, concepts de dessalement.
Explorer →Concepts d’ingénierie
Récupération RO, pression osmotique, membranes.
Explorer →Références d’équipements
Pompes, membranes, tubes de pression, récupération d’énergie.
Explorer →Fabricants
Fabricants de membranes et composants RO.
Explorer →Projets de dessalement
Études de cas SWRO documentées.
Explorer →