Abstract:
Provided is a method for cleaning a filtration membrane contained in a water treatment system and the water treatment system. The method comprises a first cleaning mode. The first cleaning mode comprises: adding a first cleaning solution to the feed water stream; pre-filtering the feed water stream containing the first cleaning solution to obtain a first pre-treated water stream; filtering the first pre-treated water stream with the filtration membrane to obtain a first product water stream; and neutralizing the first product water stream to obtain a first neutralized product water.
Abstract:
Embodiments of the present invention relate to an underwater gas/liquid-liquid modular separation system which enables the disposal of produced water in undersea environment. The underwater gas/liquid-liquid modular system separation consists of a gravitational separator and a water polishing system consisting of deoiling membranes capable of withdrawing the residual oil contained in water. Furthermore, the underwater gas/liquid-liquid modular separation system also features a demulsifier injection which promotes the breakdown of the water-oil emulsion. Embodiments further relate to an underwater gas/liquid-liquid separation method and to the use of deoiling membranes in gas/liquid-underwater liquid separation systems.