Wastewater Pumping
Anthropogenics, a modern term, refers to significant human impacts on the environment, with wastewater being one such impact. EETS engineers skillfully design controls and processes for effluent disinfection, pumping station rehabilitation, clarifier modification, and SCADA instrumentation controls, ensuring that all work meets or exceeds regulatory guidelines.
SPOTLIGHT
Wastewater Pumping Projects
Douglas County, California
Douglas County Sewer Irrigation District (DCSID) Main Pump Station
In 2005, the DCSID Main Pump Station and Treatment Plant experienced a line rupture due to the obsolescence of the existing force main. DCSID requested EETS engineers to design a new force main to serve as the primary sewage flow pathway, while retaining the existing obsolete system exclusively for emergency and maintenance situations. This
task was part of the Redundant Force Main Project, which included energy recovery from the effluent force main, equalization basins, STPUD intertie, retrofitting of the main lift station, reservoir lining, and evaluation of the effluent force main. The complete scope of EETS’s work included the following:
In 2005, the DCSID Main Pump Station and Treatment Plant experienced a line rupture due to the obsolescence of the existing force main. DCSID requested EETS engineers to design a new force main to serve as the primary sewage flow pathway, while retaining the existing obsolete system exclusively for emergency and maintenance situations. This task was part of the Redundant Force Main Project, which included energy recovery from the effluent force main, equalization basins, STPUD intertie, retrofitting of the main lift station, reservoir lining, and evaluation of the effluent force main. The complete scope of EETS’s work included the following:
- Designed new multi-pulse VFDs (Variable Frequency Drives) to operate existing 150HP tandem pump pairs and future single inverter duty 300HP motors
- Designed new redundant ultrasonic level controllers, and new redundant PLC with auto cut-over
- Designed new auxiliaries including front panel controls for interface to new PLC controller and ultrasonic level control systems
- Provided construction cost estimates
- Provided electrical design drawings and specifications for competitive bidding
- Provided necessary utility coordination for approval of VFD drives
- Provided construction sequence for retrofit of existing MCC to accept (3) new 300HP VFD and pump motor controls and integration to new control panel
- Generated procurement drawings and specifications for free-standing control panel with redundant PLCs and dual OIDs, and provided bid and construction services
Manteca, California
Manteca Industrial Pipeline
Eckert Cold Storage needed a pipeline to divert its industrial wastewater to a separate collection and disposal system. This pipeline would route Eckert’s wastewater around the City’s sanitary sewer collection system and bypass Manteca’s Wastewater Quality Control Facility (WQCF) for direct disposal
onto City farmland. The project included adding a 6MGD secondary effluent storage pond, a subsurface drainage system, a new pump station with new electrical service, floating mechanical aerators with a control system, industrial piping, motor control valves, and a new access platform. Additionally, a new wet well pump station was installed to aid in the distribution of the effluent.
Eckert Cold Storage needed a pipeline to divert its industrial wastewater to a separate collection and disposal system. This pipeline would route Eckert’s wastewater around the City’s sanitary sewer collection system and bypass Manteca’s Wastewater Quality Control Facility (WQCF) for direct disposal onto City farmland. The project included adding a 6MGD secondary effluent storage pond, a subsurface drainage system, a new pump station with new electrical service, floating mechanical aerators with a control system, industrial piping, motor control valves, and a new access platform. Additionally, a new wet well pump station was installed to aid in the distribution of the effluent.
EETS engineers performed the electrical design of the wastewater treatment facilities/pump station:
- Designed (2) 7.5HP influent pumps
- Designed 20HP floating aerators
- Designed motor control cabinets (MCC)
- Provided PLC-based controls
- Provided HMI interface
- Provided instrumentation and controls
Courtland & Walnut Grove, California
Courtland-Walnut Grove Pump Stations
This project by the Sacramento County Sanitation District (CSD1) consists of two pump stations and a force main sewer pipe that transports wastewater flow from the Courtland Wastewater Treatment Plant to facilities near the Rio Cosumnes Correctional Center. The lift stations are situated in Courtland at the WTP and near Walnut Grove.
Courtland new facilities include:
- Design of (2) duplex pump stations, with a total of 235HP of pumping capacity, utilizing 18-pulse VFDs and fixed speed drives
- Motor control centers containing automatic transfer switches, PLC-based control panels, and bubbler level monitoring systems
Walnut Grove new facilities include:
- Design of (2) duplex, dual-wet well pump stations, with a total of 620HP of pumping capacity, utilizing 18-pulse VFDs and fixed speed drives
- Motor control centers containing automatic transfer switches, PLC-based control panels, and dual-bubbler level monitoring systems
Sacramento, California
Sacramento Regional County Sanitation District – Cordova Pump Station
This project was a major refurbishment of 10MGD sewage pump station for the Sacramento Regional County Sanitation District:
- (3) 100HP 18-pulse VFD drives and inverter duty motors
- Increased main service size, emergency generation and automatic transfer switch
- Major refurbishment, replacement and expansion of controls, instrumentation, and HVAC systems.
- PLC based and SCADA integrated EGEN Fuel management system
- Additions to existing Modicon Quantum control system
- PLC programming
Oakwood Lake Water District (OLWD)
Oakwood Lake Water District (OLWD) Wastewater Pumping Plant
The Oakwood Lake Water District provides wastewater services to the Oakwood Shores subdivision and the Oakwood Lake Mobile Home Park. EETS was contracted to perform the following tasks to accommodate the increase in load and optimize the operation of the facility:
- Upsize the existing service from 240V to 480V and manage a seamless utility cutover
- Install new utility metering section, a 480V Motor Control Center (MCC), and a control panel.
- Replace the existing motor and pump assemblies with new starters.
- Install a 480V Automatic Transfer Switch (ATS) and a diesel-powered emergency generator.
- Implement a control panel with PLC and telemetry hardware, including provisions to intercept existing control panel digital and analog signals.