Abstract: The integrated reverse osmosis/pressure retarded osmosis system includes a first housing configured for pretreating feed brine, a second housing, a third housing configured for pretreatment of seawater, a first splitter positioned in communicating relation with the third housing, a first pump positioned in communicating relation with the first splitter, a fourth housing positioned in communicating relation with the first pump, a mixer positioned in communicating relation with the second housing and the first splitter, a first energy recovery system positioned in communicating relation with the second housing, a second energy recovery system positioned in communicating relation with the fourth housing, and a generator. The fourth housing configured for receiving pressurized seawater and producing desalinated product water by reverse osmosis. The second housing configured to receive feed brine from an oil production waste stream and decrease the salinity of the feed brine by pressure retarded osmosis.

Abstract: The combination multi-effect distillation and multi-stage flash evaporation system integrates a multi-stage flash (MSF) evaporation system with a multi-effect distillation (MED) system such that the flashing temperature range of the MSF process is shifted upward on the temperature scale, while the MED distillation process operates in the lower temperature range. The multi-stage flash evaporation system includes a plurality of flash evaporation/condensation stages, such that the multi-stage flash evaporation system receives a volume of seawater or brine from an external source and produces distilled water. The multi-effect distillation system includes a plurality of condensation/evaporation effects, such that the multi-effect distillation system receives concentrated brine from the multi-stage flash desalination system and produces distilled water.

Abstract: The integrated reverse osmosis/pressure retarded osmosis system includes a first housing configured for pretreating feed brine, a second housing, a third housing configured for pretreatment of seawater, a first splitter positioned in communicating relation with the third housing, a first pump positioned in communicating relation with the first splitter, a fourth housing positioned in communicating relation with the first pump, a mixer positioned in communicating relation with the second housing and the first splitter, a first energy recovery system positioned in communicating relation with the second housing, a second energy recovery system positioned in communicating relation with the fourth housing, and a generator. The fourth housing configured for receiving pressurized seawater and producing desalinated product water by reverse osmosis. The second housing configured to receive feed brine from an oil production waste stream and decrease the salinity of the feed brine by pressure retarded osmosis.

Abstract: The combination multi-effect distillation and multi-stage flash evaporation system integrates a multi-stage flash (MSF) evaporation system with a multi-effect distillation (MED) system such that the flashing temperature range of the MSF process is shifted upward on the temperature scale, while the MED distillation process operates in the lower temperature range. The multi-stage flash evaporation system includes a plurality of flash evaporation/condensation stages, such that the multi-stage flash evaporation system receives a volume of seawater or brine from an external source and produces distilled water. The multi-effect distillation system includes a plurality of condensation/evaporation effects, such that the multi-effect distillation system receives concentrated brine from the multi-stage flash desalination system and produces distilled water.