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The paper reviews an integrated system for space station water supply based on a combination of water recovery systems and a water resupply system. The water balance data and system performance data in long-duration operation on the Mir space station are presented. A water supply concept for the Russian's segment (RS) of the International Space Station (ISS) is substantiated.

The paper analyzes and summarizes experience in developing and flight operation of the system for potable water recovery from humidity condensate. The system schematic and its hardware are reviewed. The system performance data on Salut and Mir space stations are presented. Succession to the development of a similar system for the International Space Station (ISS) service module is shown.

A concept of developing a regenerative water management system (RWMS) for first lunar base missions is reviewed. The principal feature of the concept proposed is the maximum possible unification of RWMS for long-duration orbiting station and a lunar base with due regard to possible modification of the hardware for lunar gravity conditions. The paper is based on the expertise in research, development, testing and flight operation of RWMS in Russia. An upgraded RWMS of the International Space Station may be used for first lunar missions.

As space flights tend to be more prolonged problems of oxygen generation by physico-chemical means assume greater importance. The paper deals with the water electrolysis process and CO2 reduction. Some operational results of the system for water electrolysis on Mir space station are presented. Expected characteristics of the systems for water electrolysis and carbon dioxide reduction are considered.

This paper deals with water reclamation from humidity condensate and urine schematics and processes realized on orbital space stations Salut and Mir. The results of research in updated processes and schematics for condensate separation, purification and distillation with heat energy recovery are described. It is shown that the processes and hardware make possible to reduce energy demand and the weight of the water recovery systems under operation on space stations.

The paper deals with the system for hygiene water recovery developed for the Mir orbital space station. The paper presents a system schematic, its operation logic and the system component design. The results of system ground checkout tests and its operation on the Mir space station verify the system design solution adopted and the effectiveness of the procedures developed for system preservation and re-activation prior to and during station spaceflight.

As space flights tend to be more prolonged problems of oxygen generation by physicochemical means assume greater importance. The paper deals with the water, electrolysis process, CO2 concentration and processing organisation schemes. Some operational results of the system for electrolysis of aqueous alkali solution and CO2 removal on Mir space station are presented. Expected characteristics of the complex system for oxygen generation from carbon dioxide are considered.

The paper deals with the problems of development of physico-chemical systems for water recovery and atmosphere revitalization for long-duration space stations. Schematics of regenerative life support systems featuring a high degree of closure and biotechnological components are presented. A year-long experiment has proved the possibility for Man to stay in a closed artificial environment for a long time by consuming substances regenerated by physico-chemical means from the end products of life. A complex of the life support systems (LSS) on Mir space station allowing for oxygen and 90% water recovery as well as its future updating is considered.

The paper deals with some aspects and results of research in major processes and hardware of a system for hygiene waste water recovery and its architecture concepts. A principal system schematic and its functions on Mir space station are presented. It is shown that physico-chemical means ensure cost-effective recovery with minimum energy demand and resupply which is particulary important for long-duration space missions.