Calculator
RO Recovery Calculator
Calculate reverse osmosis recovery percentage and reject flow from feed and permeate flow.
Calculator Inputs
Feed flow must be a valid number.
Permeate flow cannot be greater than feed flow.
Legend
RO recovery legend
RO recovery shows the percentage of feed water converted into permeate. Reject flow is the remaining flow discharged or returned depending on system design.
Input meaning
- Feed flow: enter the measured, quoted, or hospital-approved value in L/min.
- Permeate flow: enter the measured, quoted, or hospital-approved value in L/min.
Result interpretation
- Higher recovery can reduce water waste but may increase scaling or membrane stress.
- Reject flow helps estimate drainage, pretreatment loading, and water consumption.
Assumptions
- Dialysis water system settings must follow local water quality and manufacturer requirements.
- Do not optimize recovery without reviewing scaling, membrane performance, and water quality.
Biomedical use
- Useful for dialysis WRO review, membrane performance trending, pretreatment sizing, and service report checks.
How to identify the required values
Use these examples and common working ranges to choose values from gauges, labels, manuals, datasheets, RFQs, service reports, CMMS records, or hospital planning assumptions.
| Field | Example value | Common range | Tip |
|---|---|---|---|
| Feed flow | Feed rotameter reads 20 L/min. | Use stable feed-flow reading during normal production. | Read when the RO is stable and producing water, not during startup or flush. |
| Permeate flow | Product/permeate flowmeter reads 12 L/min. | Use stable RO product flow from the flowmeter, not startup or flush flow. | Use stable product-water flow during normal operation. |
Common ranges are starting points for hospital planning. For final procurement, acceptance testing, electrical design, medical gas design, radiation shielding, dialysis water systems, or clinical use, replace the example values with site-specific data and vendor-confirmed figures.
Input Checklist
Confirm these values before relying on the output for procurement, PM, or service planning.
- Feed flow
- Permeate flow
Safety And Engineering Notes
Use calculator outputs as planning estimates and verify critical systems with calibrated measurement or qualified engineering review.
- Dialysis water system settings must follow local water quality and manufacturer requirements.
- Do not optimize recovery without reviewing scaling, membrane performance, and water quality.
Related Calculators
Continue with calculators in the same biomedical planning area so estimates for power, gas, water, imaging, staffing, procurement, or lifecycle cost stay connected.
dialysis
Dialysis Water Consumption Calculator
Estimate dialysis treatment water demand from station count, sessions, treatment hours, and dialysate flow.
dialysis
Salt Consumption Calculator for Water Softeners
Estimate softener salt consumption from water volume, hardness, and resin regeneration efficiency.
dialysis
Chlorine Dosing Calculator
Estimate chlorine dosing pump rate from water flow, target chlorine dose, and chemical strength.
dialysis
RO Reject Water Calculator
Estimate RO reject water from permeate flow and recovery percentage.
Related Equipment Hubs
Related Procurement Resources
Procurement guide
Medical Equipment RFQ Writing Guide: How Hospitals Can Prepare Better Equipment Tenders
A well-written medical equipment RFQ is one of the most important documents in hospital procurement. It helps the hospital receive comparable vendor offers, avoid hidden costs, reduce post-award disputes, and ensure that the supplied equipment is clinically usable, technically compliant, and maintainable throughout its lifecycle.
Procurement guide
Medical Equipment Service Contract SLA Guide
A medical equipment Service Level Agreement (SLA) is far more than a maintenance contract. It is a formal document that defines vendor responsibilities, response times, preventive maintenance requirements, spare parts support, reporting obligations, and performance expectations throughout the equipment lifecycle.
Procurement guide
Medical Equipment Acceptance Testing Guide: A Complete Hospital Handover and Commissioning Checklist
Medical equipment acceptance testing is one of the most critical steps in the healthcare procurement lifecycle. It serves as the bridge between equipment delivery and clinical operation, ensuring that hospitals receive exactly what was purchased and that the equipment is safe, functional, properly documented, and ready for patient use.