'New' Sewage Needs New Solutions

Palm Spring solves problem of disposable products with chopper pump

Once a week is too often to be unplugging sewage pumps, especially when the pump station is 43 ft below a major street in Palm Springs, Calif. The high maintenance and overtime costs were getting out of hand and the city needed a cost-effective solution.

The original non-clog pumps had provided acceptable service when they had been installed years earlier. But the changing nature of today's sewage, carrying ever increasing amounts of debris such as disposable floor wipes, baby wipes and shop towels has rendered these non-clog pumps ineffective. The clogging problems generated way too many high-level alarms and overflow emergencies.

Veolia Water operates the city of Palm Springs treatment plant and collection systems. Veolia's Doug Loar, after contacting Vaughan's California sales representative, Rockwell Eng. & Equipment, then worked directly with Vaughan Co.'s engineering department to find the easiest way to make the piping transitions from the old non-clog pumps to Vaughan E-Series pedestal chopper pumps in the tight space.

The improved efficiency of Vaughan's chopper pumps allowed replacement of the original pumps with equal power chopper pumps.

Vaughan Co. and the city of Palm Springs have a positive history going back more than a dozen years with more than a dozen different, successful chopper pump installations. So Veolia had confidence that the Vaughan chopper pumps would solve the plugging problems in the Mesquite Avenue pump station. To make installation easier, Vaughan Co. custom-manufactured a couple of ductile iron spool pieces for the suction side of each pump. The two 15 hp, 800 gal per minute Vaughan 6" discharge vertical pedestal chopper pumps use Vaughan's flushless, cartridge mechanical seal, eliminating the old seal water flush.

The pumps were installed in early May 2010 and have operated flawlessly since startup. Veolia's long-running battle with the original non-clogs at this pump station is finally over. Three other problem pump stations in Palm Springs are to be converted to Vaughan chopper pumps in the near future.

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