Ultrafiltration (UF) Waste Water Treatment Systems
Ultrafiltration (UF) systems are designed for water treatment applications across various industries, including chemical and pharmaceutical manufacturing, food and beverage processing, and wastewater treatment. These systems utilize membrane filtration technology to separate contaminants from water, ensuring high-quality output suitable for reuse or discharge.
How Ultrafiltration (UF) Systems Work?
Ultrafiltration systems use a fine membrane to filter out suspended particles, colloids, and larger molecules while allowing water and smaller solutes to pass through. This process is driven by hydrostatic pressure and is commonly used in industries for purifying and concentrating macromolecular solutions such as protein solutions. UF is similar to microfiltration and nanofiltration but differs in the size of molecules it can block. The system helps eliminate the need for clarifiers and multi-media filters, making it an efficient solution for meeting strict discharge standards. Effective UF systems feature membranes that are immersed, back-flushable, and air-scoured, enhancing performance and longevity. Spiral-wound UF/MF membranes offer excellent clarification capabilities for process water and wastewater.
Advantages of Ultrafiltration (UF) Systems
- Superior filtration performance with high flux
- Very small nominal pore diameter (0.03 µm)
- Efficient removal of bacteria and viruses
- Periodic backwashing and air scouring to enhance performance and reduce fouling
- Low-fouling membrane modules
- Outside-In or Inside-Out configurations for reduced plugging and higher solids loading
- Compact, modular design for cost-effective and space-efficient systems
- High chemical resistance and temperature tolerance for effective cleaning
Applications
1. Sewage treatment plants in large cities, either newly built or renovated
2. Urban sewage can be directly processed into high-quality recycled water for urban greening, landscape irrigation, road spraying, industrial cooling, fire protection, residential flushing, and car washing
3. Small and medium-sized reclaimed water projects in industrial, mining, hotel, airport, railway station, hospital, office building, and residential areas
4. Ideal for small and medium-scale reclaimed water projects due to its space-saving, flexible layout, on-site water collection, processing, and reuse features
System Overview
The entire system consists of three main sections: pre-treatment, microfiltration membrane desalination, and post-processing.
1. Pre-Treatment Section
This section includes multimedia filters, activated carbon filters, and ultrafilters. Its primary function is to remove substances that could pollute the microfiltration membrane. Key functions include:
- Preventing membrane scaling
- Reducing fouling caused by colloidal and suspended particles
- Protecting against organic matter and microbial fouling
- Preventing damage from oxidizing agents
- Ensuring long-term stable operation and consistent output
2. Microfiltration Membrane Section
This section uses nanometer-level physical apertures to separate, purify, and concentrate substances in liquid. It is essential for removing suspended particles, colloids, organics, microbes, bacteria, viruses, and color. Microfiltration is widely applied in seawater purification, reclaimed water reuse, RO pre-treatment, chilled water preparation, rural water purification, and ultrapure water production. Compared to traditional methods, it offers standard design, lower costs, higher output, and stable operation with minimal labor and space requirements.
3. Technical Parameters
- **Raw Water Pump**: A horizontal centrifugal pump made of stainless steel, providing 2 m³/h flow rate at 30 m lift. Note: The raw water pump is provided by the customer.
- **Multimedia Water Filter**: Designed for 1 m³/h capacity, with a vertical cylinder structure (dia 350×1400 mm), using fine quartz sand as the filtration material.
- **Activated Carbon Filter**: Features a round cylinder structure (dia 350×1400 mm), using nut shell activated carbon (grain size 1.6–4.0 mm) to effectively remove residual chlorine and organic compounds.
- **Ultrafiltration Filter (UF)**: A straight-cylinder unit (dia 170×650 mm) with 3 units of 5 µm PP cartridges, designed for 1 m³/h capacity.
- **Microfiltration Membrane**: Model 4040, 4 sets, manufactured by Hydra-nautic, capable of removing suspended particles, colloids, organics, bacteria, and viruses.
- **UV Sterilizer**: 1 set, with a 1 m³/h capacity, made of 304 stainless steel, 40W power, and manufactured by Jiangsu Yilida.
These systems ensure efficient, reliable, and sustainable water treatment, meeting the needs of diverse industries and environmental regulations.
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