OEM High-Ratio Water Reuse Equipment - Ultrafiltration & Reverse Osmosis by China Suppliers and Factory Suppliers, Supplier
Product Description
Process Flow and Principle
Raw water first enters the pretreatment unit, which typically consists of a multimedia filter or self-cleaning filter, retaining suspended particles larger than 50 micrometers and reducing the fouling load on downstream membrane units.
The pretreatment effluent then enters the Ultrafiltration (UF) unit. The UF membrane has a molecular weight cut-off (MWCO) ranging from 100,000 to 200,000 Daltons, with a pore size of approximately 0.01–0.02 micrometers. It separates colloids, bacteria, and macromolecular organic matter from the water. The UF permeate turbidity is reduced to below 0.1 NTU, and the Silt Density Index (SDI) is controlled below 3.
The UF permeate is pressurized by a booster pump and enters the Reverse Osmosis (RO) unit. The RO membrane is a polyamide composite membrane with a salt rejection rate of not less than 97%. Driven by pressure, water molecules pass through the RO membrane, while the majority of dissolved salts, organic matter, and microorganisms are retained and concentrated.
The conductivity of the RO permeate can be reduced to below 50 μS/cm, meeting the requirements for circulating cooling water makeup or process water. The system recovery rate is designed between 60% and 75% based on the raw water quality.
Equipment Structure and Core Components
The equipment consists of pretreatment filters, UF membrane modules, RO membrane modules, a high-pressure pump, a chemical dosing system, a cleaning system, and a PLC control cabinet.
- ✓ The UF membrane uses hollow fiber PVDF material, available in outside-in or submerged configurations.
- ✓ RO membrane elements are spiral-wound with pressure vessels made of FRP or stainless steel.
- ✓ Includes anti-scalant dosing, reducing agent dosing, and pH adjustment devices.
- ✓ Control unit uses a PLC to achieve automatic operation and fault alarms.
Key Performance Indicators and Applicable Standards
- ★ The determination of product water quality targets is based on water quality requirements for reclaimed water reuse specified in national and industry standards.
- ★ Targeted indicator plans are developed based on customer's proposed end-use, downstream process integration, and on-site water source conditions.
- ★ Guaranteed performance values covering all indicators are provided during the design phase as acceptance criteria.
Application Fields
This equipment is used for wastewater reuse in industries such as electronics, chemicals, textiles, and food, as well as for upgrading municipal wastewater treatment plants and utilizing reclaimed water. The produced water can be directly used as makeup water for open circulating cooling water systems, for plant irrigation, floor washing, or as pretreatment feed water for purified water preparation or boiler makeup water treatment systems.
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Frequently Asked Questions
The Ultrafiltration (UF) membrane features a pore size of approximately 0.01–0.02 micrometers, effectively separating colloids, bacteria, and macromolecular organic matter.
Our Reverse Osmosis (RO) unit uses polyamide composite membranes with a salt rejection rate of not less than 97%.
Yes, the RO permeate conductivity is typically reduced to below 50 μS/cm, making it ideal for circulating cooling water makeup or process water.
The system recovery rate is generally designed between 60% and 75%, depending on the specific raw water quality conditions.
Yes, the system is equipped with a PLC control cabinet that enables automatic operation, product water flushing, and real-time fault alarms.
RO membrane pressure vessels are constructed using high-quality FRP (Fiber Reinforced Plastic) or stainless steel, depending on the configuration and client requirements.
