Vacuum activated closed loop system

A vacuum activated closed loop system for creating a vacuum by harvesting the pressure differential of rapidly flowing liquid in a siphon, said system comprising:

• a) an uplift column, further comprising a top and a bottom, through which liquid flows in an upward direction;
• b) a downflow column, further comprising a top and a bottom, through which liquid flows in a downward direction;
• c) a main loop crossover header, further comprising a top, joining the uplift column to the downflow column, and positioned between the top of the uplift column and the top of the downflow column through which liquid flows from the uplift column to the downflow column;
• d) a micro-bubble diffuser located in the downflow column extending into the liquid flowing in the downward direction;
• said diffuser comprises:
• an inlet passing through an outer wall of said diffuser, the outer wall of said diffuser surrounding an outer wall of said downflow column, a plurality of individual separate microtubes passing through the outerwall and an inner wall of said downflow column, said microtubes being perpendicular to a flow path within the downflow column, the microtubes each comprising an outermost end, each outermost end being spaced away from the inner wall of the downflow column in a staggered manner, the outermost ends located within and parallel to the flow path within the downflow column, the outermost end releasing bubbles into the flow path;
• e) a priming system which fills the uplift and downflow columns with liquid to initiate the flow of liquid in the siphon;
• and
• f) at least one scavenger loop each of which comprises:
• i) a scavenger downflow column, further comprising a top and a bottom, through which liquid flows in the downward direction;
• ii) a scavenger loop crossover header, further comprising a top, attached to the top of the scavenger downflow column, wherein liquid flows through the scavenger loop crossover header to the downflow column, and wherein the liquid enters the scavenger loop crossover header at a point below the top of said scavenger loop crossover header, such that gas accumulates in the scavenger loop crossover header below the top of the scavenger loop crossover header;
• and
• iii) a conduit that connects the top of the main loop crossover header to the top of the scavenger loop crossover header.