China High-Ratio Water Reuse Equipment in China - Suppliers and Factory for Pretreatment, UF, and RO Process 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
Pretreatment filters, UF membrane modules, and RO membrane modules designed for high efficiency.
High-pressure pump, chemical dosing system, and integrated cleaning system.
PLC control cabinet for automatic operation, flushing, and fault alarms.
PVDF hollow fiber UF membranes and spiral-wound RO membranes with FRP/Stainless steel vessels.
Key Performance Indicators and Applicable Standards
✅ The determination of product water quality targets is based on two inputs: (1) the water quality requirements for reclaimed water reuse specified in current national and industry standards; and (2) the customer's proposed end-use for the product water, downstream process integration requirements, and on-site water source conditions. Based on this information, the company develops a targeted indicator plan.
✅ Based on the customer's water quality report and volume requirements, the company provides a process scheme and guaranteed performance values covering the above indicators during the design phase. These values are mutually confirmed and used as the acceptance criteria for the equipment.
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 cooling systems
- Plant irrigation & Floor washing
- Purified water pretreatment
- Boiler makeup water feed
Other Products
Modular Containerized Seawater Desalination
High-Salinity Wastewater ZLD System
OEM Precision Manufacturing
