Calculadora de mezcla de permeados

Blend raw and permeate to hit a target conductivity/TDS. Returns permeate fraction and split flows. Shareable link & CSV export included.

Value unit

Raw water (C_r)

Permeate (C_p)

Target (C_t)

Total blend flow

Flow unit

Tip: Target must lie between raw and permeate values (same unit).

What this permeate blending calculator does

Permeate blending calculator mixes raw water (conductivity/TDS = C_r) and RO permeate (C_p) to reach a target conductivity/TDS (C_t). It returns the required permeate fraction y split flows (Q_p, Q_r) for a specified total blend flow. Results are shareable by URL and can be exported to CSV, so engineers and operators review the same assumptions and numbers.

Cuándo utilizarlo

Finished water must stay within a conductivity/TDS window (e.g., drinking, boiler feed, process rinsing).
You want to blend back a small portion of raw water to reduce cost or adjust alkalinity/feel.
During pilot/commissioning, you need fast estimates of ratios and flows at different set points.

Explicación de las entradas

Value unit: μS/cm (conductivity) or TDS (mg/L). Keep units consistent across inputs.
Raw water (C_r): feed conductivity/TDS.
Permeate (C_p): RO permeate conductivity/TDS.
Target (C_t): desired conductivity/TDS of the blended stream.
Total blend flow: target mixed flow; the tool outputs Q_p and Q_r.

Mass balance & formula

Assuming linear mixing at similar temperature and CO₂ state:

C_t = f_p·C_p + (1 − f_p)·C_r ⇒ f_p = (C_t − C_r) / (C_p − C_r).
Then Q_p = f_p·Q_total and Q_r = (1 − f_p)·Q_total.

Worked example

C_r=1500 μS/cm, C_p=60 μS/cm, C_t=200 μS/cm, Q_total=1000 LPH.
f_p = (200−1500)/(60−1500) = 1300/1440 ≈ 90.3%.
Q_p ≈ 903 LPH, Q_r ≈ 97 LPH.

Units & quick conversions

Artículo	Rule of thumb	Notas
Conductivity ↔ TDS	TDS ≈ Conductivity × 0.5–0.7	Ion makeup dependent; verify on site.
LPH ↔ m³/h	1000 LPH = 1 m³/h	Use consistent flow units in the tool.

Buenas prácticas y advertencias

Sample and blend at similar temperatura; large differences affect readings.
Conductivity/TDS depends on ion makeup; if CO₂ equilibrium or dosing reactions change, verify on site and keep a safety margin.
This permeate blending calculator is an engineering estimate; finalize set points with online instruments and trend data.

Lecturas relacionadas

For scaling/corrosion tendency, see an overview of the Langelier Saturation Index (LSI). Use LSI alongside antiscalant design and temperature-corrected measurements.

From calculator to configured package

Need a configured reference? See the Solución de tratamiento de agua por ósmosis inversa de 1000 LPH (architecture, KPIs and O&M guidance). You can also model operating cost with our Calculadora OPEX.

What this permeate blending calculator does

Cuándo utilizarlo

Finished water must stay within a conductivity/TDS window (e.g., drinking, boiler feed, process rinsing).
You want to blend back a small portion of raw water to reduce cost or adjust alkalinity/feel.
During pilot/commissioning, you need fast estimates of ratios and flows at different set points.

Explicación de las entradas

Value unit: μS/cm (conductivity) or TDS (mg/L). Keep units consistent across inputs.
Raw water (C_r): feed conductivity/TDS.
Permeate (C_p): RO permeate conductivity/TDS.
Target (C_t): desired conductivity/TDS of the blended stream.
Total blend flow: target mixed flow; the tool outputs Q_p and Q_r.

Mass balance & formula

Assuming linear mixing at similar temperature and CO₂ state:
C_t = f_p·C_p + (1 − f_p)·C_r ⇒ f_p = (C_t − C_r) / (C_p − C_r).
Then Q_p = f_p·Q_total and Q_r = (1 − f_p)·Q_total.

Worked example

C_r=1500 μS/cm, C_p=60 μS/cm, C_t=200 μS/cm, Q_total=1000 LPH.
f_p = (200−1500)/(60−1500) = 1300/1440 ≈ 90.3%.
Q_p ≈ 903 LPH, Q_r ≈ 97 LPH.

Buenas prácticas y advertencias

Sample and blend at similar temperatura; large differences affect readings.
Conductivity/TDS depends on ion makeup; if CO₂ equilibrium or dosing reactions change, verify on site and keep a safety margin.
This tool is an engineering estimate; finalize setpoints with online instruments and trend data.

Need a configured reference? See the Solución de tratamiento de agua por ósmosis inversa de 1000 LPH (architecture, KPIs and O&M guidance).

PREGUNTAS FRECUENTES

¿Supone la calculadora de mezcla de permeado una mezcla lineal?

Yes. It assumes linear mixing at similar temperature and CO₂ state. Verify on site if chemistry or temperature shifts are expected.

¿Puedo utilizar TDS en lugar de conductividad?

Yes. Use a consistent unit (TDS or μS/cm) across inputs. If converting, apply your site’s factor and verify with online meters.

What if the result requires more permeate than available?

Reduce the target value or increase permeate availability. You can also polish a portion of the raw stream to lower Cᵣ.

How accurate is the estimate?

It is an engineering estimate for planning and commissioning. Final set points should be confirmed with online instruments and trend data.