Membrane filtration - UF / NF / RO

Ramson can provide membrane filters for both RO, NF and UF applications. Some membranes are in stock and the stock can be expanded if necessary.

In collaboration with Suez Water Technologies&Solutions, we can offer both spiral wound membranes for both drinking water and industrial applications as well as "hollow fiber" membranes, so-called Zeeweed.

The membranes are available in a variety of designs and are chosen based on detailed analysis and what is to be filtered out. Veolia tool Winflow is used for dimensioning.

Membrane filter units are often manufactured in a cooperation between Ramson and Veolia Water Technologies & Solutions. Small pilots as well as full scale units can be developed. Ask for our pilots that are available in our rental fleet for trials.

Two applications with membrane filters from Ramson's workshop

Picture below shows UF hollow fiber being cleaned using water bubbles. They are called Zeeweed. Each thread, hollow fiber, is a membrane and the filtration takes place from the outside in. Particles, dirt and bacteria stick to the surface of the wire membrane and are often removed both with water bubbles. At regular intervals, a slightly tougher cleaning with higher temperatures and washing chemicals is also required, to keep the membrane clean and in good condition. The wires, the hollow fiber, sit in the white houses seen standing in the container image below.

Spiral-wound membranes are used in a wide variety of applications, and below is a plant for industrial water. The filter housings in fiberglass-reinforced plastic are equipped with 3 spirally wound RO membranes. The unit also includes pre-filters, process pumps and the control. The unit is also equipped with a CIP unit, (Clean in Place) which is used to regularly remove deposits in the membranes, to maintain efficiency.