Sewage treatment process

A process of treating aqueous sewage material containing organic solids particles during flow of such material, including subjecting said material to a positive pressure in a first zone in a receptacle, flowing such material abruptly from such zone of positive pressure downward through a generally vertical conduit in a manner to provide a reactor zone of near absolute zero pressure subjacent said receptacle and full conduit flow beneath said reactor zone, precluding entry of air into said reactor zone, flowing such material from said zone of positive pressure into and through said reactor zone at high velocity, causing water vapor and gases suddenly to be separated and released in said material in said reactor zone, and permitting such water vapor and gases to expand suddenly in said reactor zone, thereby rupturing organic solids particles in said sewage material by the sudden expansion of such water vapor and gases and thereby disintegrating said particles into substantially smaller particles.