Few months back the power failed at the south end (influent) of the wastewater plant that I work. One generator was being serviced, the pneumatic starter failed on the second and the third, being the typical city worker decided the work load was excessive and shut down.
The wet well quickly backed up until a gen was restarted and an influent pump run in inverter mode. This is done from a Motor Control Center (MCC) separate from the pump station. Others were dealing with that issue so when power was restored I reset the bar screens and decided to check in the pump station.
As I went downstairs the vapor lights had barely lit, something seemed not quite right so I stopped halfway to the first landing. As the light improved I still couldn't see the pumps and realized I was looking at a lake of wastewater. A small air compressor failed, feeding a valve that will open a line common to the suction side of pump #5 to empty the dry well in case of a flood. That valve failed open and pump #5 had been removed a week earlier for service leaving 3 ft. opening for the pump station to flood.
The culprit? Flash fried squirrel bits were found scattered under the power lines where the fusible links had blown
The I-beam just above the raw influent is 20 ft. above the floor.
The pipe elbowing into the far wall is 48 inch.
The wet well quickly backed up until a gen was restarted and an influent pump run in inverter mode. This is done from a Motor Control Center (MCC) separate from the pump station. Others were dealing with that issue so when power was restored I reset the bar screens and decided to check in the pump station.
As I went downstairs the vapor lights had barely lit, something seemed not quite right so I stopped halfway to the first landing. As the light improved I still couldn't see the pumps and realized I was looking at a lake of wastewater. A small air compressor failed, feeding a valve that will open a line common to the suction side of pump #5 to empty the dry well in case of a flood. That valve failed open and pump #5 had been removed a week earlier for service leaving 3 ft. opening for the pump station to flood.
The culprit? Flash fried squirrel bits were found scattered under the power lines where the fusible links had blown
The I-beam just above the raw influent is 20 ft. above the floor.
The pipe elbowing into the far wall is 48 inch.