Product Overview

Engineering-grade skid-mounted reverse osmosis unit designed for secondary municipal effluents, industrial wastewater, and high-salinity feedwaters, achieving stable salt rejection while maximizing permeate recovery to minimize liquid waste streams.

Operating Specifications

Parameter	Technical Standard
System Recovery Rate	75% to 85% (adjustable via brine staging)
Feedwater TDS Limit	Up to 10,000 mg/L
Permeate Conductivity	Below 50 uS/cm (99.2% salt rejection)
Operating Pressure	1.2 MPa to 2.8 MPa
Electrical Supply	380V-480V, 50Hz/60Hz, 3-Phase (IP55)

Core Engineering Focus

High-Recovery Staging: Employs multi-stage arrays (2:1 or 6:3:2) with inter-stage booster pumping to balance membrane flux and prevent localized silica or calcium sulfate scaling.

Concentrate Valorization Design: Incorporates specialized hydraulic energy recovery loops to drive high osmotic pressure feeds without exceeding membrane burst limits.

Membrane Flux Optimization: Operates at conservative net driving pressures using low-fouling spiral-wound elements to extend chemical cleaning intervals and preserve active surface area.

Typical Applications

Industrial Wastewater Reclamation: Textile dyeing wastewater, paper mill effluent, and petrochemical secondary effluent recovery.

Municipal Wastewater Reuse: Secondary municipal sewage tertiary treatment for landscape irrigation and cooling tower make-up water.

High-Salinity Desalination: Inland borehole water purification and brackish groundwater desalination in arid regions.

Operational Process Flow

Pre-Treatment Filtration: Feedwater passes through multi-media filters and 5-micron precision cartridge filters to remove suspended solids and maintain SDI below 3.

Chemical Conditioning: Antiscalant and pH adjustment chemicals are metered into the feed stream via programmable pulse pumps to inhibit mineral precipitation.

High-Pressure Separation: A multi-stage centrifugal pump pressurizes conditioned water through spiral-wound elements, dividing the stream into low-conductivity permeate and concentrated brine.

Post-Treatment & CIP: Permeate routes to pH balancing units, while fouled membranes undergo automated clean-in-place (CIP) flushing using heated chemical solutions.

System Configuration & Materials

Pumping Unit: Vertical multi-stage centrifugal pumps with stainless steel wetted parts and variable frequency drives (VFD) for soft-start pressure ramping.

Pressure Vessels: Fiberglass Reinforced Plastic (FRP) multi-element side-port housings rated up to 3.0 MPa.

Membrane Elements: 8-inch spiral-wound polyamide composite RO elements featuring high salt rejection and chlorine tolerance.

Piping & Valving: Low-pressure lines in Schedule 80 UPVC; high-pressure lines in 304/316L stainless steel with grooved victaulic connections.

Control Architecture: Programmable Logic Controller (PLC) paired with a 10-inch color touchscreen HMI, electromagnetic flow meters, and inline conductivity monitors.

Feedwater Quality Limits

Parameter	Threshold Requirement
Turbidity	Below 1.0 NTU
Silt Density Index (SDI)	Below 3.0 (15-minute test)
Free Chlorine	Below 0.1 mg/L
Chemical Oxygen Demand (COD)	Below 50 mg/L
Water Temperature	5 deg C to 35 deg C

Product Water Quality

Parameter	Guaranteed Performance
Permeate Conductivity	Below 50 uS/cm (at 25 deg C)
Salt Rejection Rate	99.2% or higher
Silica Rejection	99.0% or higher
Particulate Reduction	99.9%

Customization Options

Materials of Construction: Wetted fluid paths upgradable to Super Duplex Stainless Steel (2507) or 904L for aggressive chemical or high-chloride environments.

Energy Recovery Integration: Addition of isobaric energy recovery devices (ERD) or turbochargers to reduce specific energy consumption by up to 40%.

Containerization: Complete system integration inside 20-foot or 40-foot ISO high-cube steel shipping containers with internal climate control and insulation.

Redundancy Packages: Dual-train 100% standby configuration for high-uptime critical industrial continuous production lines.

Quality Control Standards

Hydrostatic Pressure Testing: Every high-pressure piping manifold undergoes pneumatic and hydrostatic testing at 1.5 times maximum design pressure prior to assembly.

Welding Verification: Stainless steel pipe welds undergo 100% visual inspection and selective non-destructive testing (NDT) via penetrant inspection.

Factory Acceptance Testing (FAT): Complete dry and wet functional testing of electrical cabinets, instrument loop calibration, and simulated interlock logic execution.

Material Traceability: Positive Material Identification (PMI) certificates and mill test reports provided for all pressure-containing metallic components.

Frequently Asked Questions

Q: How does the system prevent silica scaling at high recovery rates?

A: The design utilizes inter-stage booster pumping combined with specialized antiscalant dosing and dynamic concentrate pH adjustment to maintain silica concentrations below saturation limits.

Q: What is the typical lifespan of the RO membrane elements?

A: Under normal operating conditions with proper pre-treatment maintenance and regular CIP procedures, membrane elements yield an operational lifespan of 3 to 5 years.

Q: Can the system handle fluctuations in feedwater salinity?

A: Yes, the integration of VFD-driven high-pressure pumps and automated sensor feedback loops allows the system to adjust operational pressure dynamically when feed TDS fluctuates.

Q: What utility connections are required on-site?

A: Site installation requires a 3-phase industrial power supply, instrument compressed air (0.6 to 0.8 MPa), a raw water feed supply line, and gravity drainage connections for reject brine and CIP waste.

Hot Tags: brackish water reuse ro system, China brackish water reuse ro system manufacturers, suppliers, best under sink ro system, countertop reverse osmosis filter, reverse osmosis alkaline water, reverse osmosis with uv light, Ultrapure water purification system, uv light for ro system

Brackish Water Reuse RO System