Abstract: The present invention relates to a high-intensity ultraviolet light emitting diodes (6) (UV-LED) device (1) for preventing biofouling formation in a system for subsea operation of a target fluid. Further, the present invention discloses such device for coupling or integration into a subsea treatment system and to a process using such device.

Abstract: A multistage membrane distillation device includes a plurality of membrane distillation cells each having at least one membrane. Each membrane defines a feed space at one surface thereof and a vapor space at an opposite surface thereof, and is configured to allow a part of a feed flowing in the feed space to evaporate and pass through the membrane as a vapor phase into the vapor space where the vapor phase is condensed to a distillate including a volatile and condensable substance, and the non-evaporated feed to exit the feed space as a concentrated fluid. The device further includes a fluid connection for allowing the distillate from an ith cell to flow as a feed into the feed space of an (i+1)th cell to produce a further distillate with a higher concentration of the volatile and condensable substance. The concentrated fluid from each cell is prevented from entering the feed space of other cells.

Abstract: A membrane distillation drive assembly including a vapor compressor, a steam expander and a prime mover, wherein a total vapor compressor load is shared between the steam expander and the prime mover. The membrane distillation drive assembly configured for driving a membrane distillation system further comprising a MD module disposed within an object and configured to receive an input feed stream and produce an output product flow stream. The vapor compressor configured to receive an input flow of low pressure steam and produce a compressed output flow, the steam expander configured to receive an input flow of high pressure steam and produce an expanded output flow. The compressed output flow and the expanded output flow provide an output flow of intermediate pressure steam to the MD module. The prime mover is coupled to the vapor compressor by one of a mechanical or electrical coupling.