- (a) A sludge transfer pump size must be based on the quantity and character of the anticipated solids load.
- (b) A mechanical pumping system must provide the minimum required firm pumping capacity with the largest sludge pumping unit out of service.
- (c) An air lift pump is acceptable for use as a sludge pump. Airlift pumps are not subject to redundancy requirement outlined in subsection (b) of this section.
- (d) A centrifugal sludge pump must have a positive suction head, unless the pump includes a priming device.
- (e) A positive displacement pump or other type of pump with demonstrated solids handling capability must be used for handling raw sludge.
- (f) Centrifugal pumps must be designed with sufficient net positive suction head to operate at the minimum anticipated water level occurring on the suction side.
- (g) A positive suction head of 24 inches or more is required for all sludge pumps.
Source Note:The provisions of this §217.244 adopted to be effective August 28, 2008, 33 TexReg 6843.