Columned UF Equipment System for Water Purification with PVDF material

1.1 Ultrafiltration is a variety of membrane filtration in which forces such as pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the membrane in the permeate. This separation process is used in industry and research for purifying and concentrating macromolecular solutions, especially protein solutions.

Cross Flow Ultrafiltration (also known as Tangential Flow Ultrafiltration) is a separation process where the feed stream is in parallel to the membrane surface, which helps to control the formation of the gel layer, greatly improving flux stability and membrane life vs. perpendicular flow systems.

As opposed to conventional filtration which causes a quick build-up of solids onto the membrane surface, cross flow filtration increases the passage of permeate through the membrane and overall flux efficiency.

Both sanitary and industrial ultrafiltration membranes are comprised of a semi-permeable, polymeric membrane layer cast onto a uniform substrate, or backing material. Synder Filtration employs phase inversion to extra solvents out of the liquid polymer dope that has been cast onto the backing material. As the solvents are extracted, the polymer solidifies forming an asymmetric pore structure, which is ideal for controlling rejection at the surface, while promoting maximum throughput of permeate.

2.2 Structure and Specifications of UF Membrane Modules

2.2.1 Small size of UF modules

The structure as the following:2.2.2 type A of 8 inches UF module.

2.2.3 type B of 8 inches UF module. The structure as the following:

The whole installation and application process of our MBR modules are described as the following photo:

We,Hangzhou Kaihong Membrane Technology Co.,Ltd, is established on the year of 2003. We specializes in manufacturing UF and MBR membrane modules. We own more than 20 years of experience for the applying of UF and MBR membrane modules. Our products have been used in more than 1000 water treatment plants. We also have more than 2000 customers all over the world.

We have R&D team to develop new products and new separating technology for ourselves. We also have quality controlling system to ensure our products. At present our main products are made of PSF/PP/PVDF. We have hollow fiber membranes and flat sheet membranes for MBR systems. So we can meet different requirements for wastewater treatment and water purification.