Abstract
This chapter focuses on waste water/sewage pumps. Sewage is one type of waste water that contains biodegradable waste. There are industrial and municipal waste waters, the former's character being tied to the products that are being manufactured and the latter being a combination of sewage and industrial wastes. Pumps are used in the collection and treatment processes tied in with these waste water applications. Piston diaphragm and progressing cavity pumps have been very successful in the transportation of sewage and industrial sludges. Vortex or torque flow pumps are used to handle light gritty sludges. These pumps are used in many cases where materials in the sludge cause clogging of the conventional sewage pumps. Screw pumps are sometimes called upon to handle sludge transport with low lift and short distances. Plunger type reciprocating units are also used on occasions for sludge pumping. Submersibles are also being increasing used in waste water/sewage treatment plants. They offer many advantages due to their hermetic nature and the only drawback appears to be a few points difference in overall efficiency.
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