We provided electrical engineering design services for a wastewater treatment plant, which occupies a 40-acre site and treats approximately 175 million gallons of wastewater per day.
Engineering services included utility interconnection, 4.16kV power distribution design, pre-purchase specifications for the MCC transformer and soft starter, single line diagrams, control interconnection wiring schedules, grounding design, and design of the interface with San Diego Gas & Electric’s gas meter. We completed a coordination study up to tie-in of 5kV breaker upstream relay and provided the 480V and 208V power distribution design for all miscellaneous loads, including but not limited to: water treatment system, fuel cell lighting area, chiller air compressor, oil pump, chilled water pumps, and an exhaust system. We provided all specifications and drawings, and completed signed and sealed drawings for permits.
The facility purifies wastewater digester gas and feeds it back into the natural gas pipeline system. The biogas generated from the process is enough to power 4.5 MW of renewable, highly efficient, fuel cell generation.