Accumulator for water management

A vacuum toilet flush system, comprising:

• a water accumulator positioned with respect to a vacuum toilet bowl, the water accumulator comprising a bladder system within a housing,
• the bladder system comprising a compressible bladder configured to hold an amount of water needed for at least one toilet flush under pressure, the compressible bladder comprising a first portion comprising a half sphere and a second portion comprising a half sphere, and a manifold for sealing the first and second portions of the bladder to one another to form the compressible bladder, the manifold comprising a fluid port inlet and a fluid port outlet;
• the housing further comprising one or more pressurized air cavities surrounding the bladder system and at least one air distributor port for delivering pressurized air to the one or more pressurized air cavities;
• wherein filling the bladder system with fluid through the fluid port inlet causes the bladder system to expand and to compress pressurized air in the one or more pressurized air cavities, creating pressure against the bladder system,
• and wherein built-up pressure from the pressurized air in the one or more pressurized air cavities helps force water out of the bladder system through the fluid port outlet and to the vacuum toilet bowl for flushing, such that the accumulator delivers the water to the toilet at a pressure of about 20-45 psi.