Filtration membranes

Condorchem Envitech provides several technologies that enable the production of high-quality water from various supply sources. By means of additional purification systems it is possible to obtain high-quality, ultra-pure water suitable for critical application.

In order to attain water quality goals we have designed treatment plants with different filtration stages and membrane systems. The type of membrane depends on the size  the contaminants to be removed, and for this we offer different technologies: ultra-filtration, micro-filtration, nano-filtration and reverse osmosis.

The membrane filtration process consists of separating two flows, permeated or filtered water and a reject that contains particles and concentrated salts taken from the water flow supplied to the system. The membranes are located inside a container, with one exit for the filtered water and one for the reject. The supply to the set of membrane containers takes place with a pump that must provide enough pressure to overcome the loss of charge from filtering sets and osmotic pressure. During ultra-filtration the pressure is usually between 1.5 and 3 bar, during nano-filtration goes from 3 to 10 bar and during reverse osmosis from 10 to 60 bar, or more in some extreme cases. In large sized plants of reverse osmosis, systems of energetic recovery can be used.

The rejects from the membrane can be recovered in the process, then discharged or treated instead with other concentration procedures such as evaporation and crystallization to achieve zero liquid discharge.