Water Treatment
Water treatment involves transforming raw water into potable water. EETS specializes in designing controls and instrumentation for water treatment processes, serving a client base that includes municipalities and water districts.
SPOTLIGHT
Water Treatment Projects
Escondido, California
City of Escondido Vista Water Treatment Plant
Major refurbishment of controls, instrumentation, and process equipment for a 90MGD water treatment plant. The scope of EETS’s work included the following:
- New central control room panels with PLC-based and manual controls, instrumentation, videographic recorders, flat panel monitors, and an operations console
- New HMI system utilizing Wonderware Intouch running on a Windows NT-based system with Ethernet LAN
- New instrumentation and PLC-based controls for on-line and backwash control of (8) dual bed filters
- New motor operations and controls for filter valve operators
- New chemical metering pumps and magnetic flowmeters for (15) process chemical feeders
- New PLC-based controls and drive refurbishment for (3) sludge bridges
- New pump station PLC-based controls for 200HP VFD influent pump
- New plant flowmeter instrumentation additions, upgrades, and modifications
- New plant wide power monitoring system and data highway plus network
- New process instrumentation and controls at various process locations throughout the plant
Vacaville, California
City of Vacaville Water Treatment Plant
EETS was engaged to design the expansion of the diatomaceous earth plant (DE) from 5 to 10 MGD capacity and to carry out a major refurbishment of all controls and instrumentation for the Treated Water Pump Station (TWPS). The complete scope of EETS’s work included the following:
- Design for expansion of filter capacity and ancillary facilities at the DE plant
- Design for expansion of filter capacity and ancillary facilities at the DE plant
- New plant main switchboards, motor control centers, pumps, control panels, instrumentation, and SCADA system and telemetry link to (4) remote reservoirs and remote well sites
- Controls and instrumentation for individual process control of filtration/backwash, chemical addition, effluent pumps, and remote facilities
- Design of VFD system for TWPS plant
- PLCs linked via data highway and utilize panel view color CRT operator interface devices
- SCADA/HMI utilizing Intellution ‘Fix’
- Pre-bid services
- Construction services
- Start-up and commissioning
Fremont, California
Alameda County Water District Water Treatment Pump 2 Recovery Hydro
ACWD owns and operates a 1.25MW conduit exemption type hydroelectric project on the main water supply pipeline to their Water Treatment Plant #2 (WTP#2). Four 250kW generators were replaced with 300kW turbine generator units, utilizing pumps as turbines. EETS’s design work included:
- Integration of new generator protective relaying, winding and bearing RTD protection, and addition of surge protection to generator leads
- Provide engineering design for integration of new generating units to existing generator switchgear for units 1, 2, 4, and 5; develop protective relay settings for new generator and new capacitor current balance relays
- Replacement of components to accommodate the increased size of generators and the replacement of failed capacitors, along with the addition of calculated KVAR correction for the new generators
- Addition of new current transformers and current balance relaying protection to unit capacitor leads
- Design new ModBus communication bus
- Utility coordination with Pacific Gas & Electric
- Provide engineering calculations to verify adequacy of existing generator breakers, contactor ratings, cable sizing, and current transformer ratios for the 4 units
- Provide engineering calculations of available short circuit and clearing times for new generators and protection, for inclusion in updated plant short circuit/coordination and arc flash
- Provide engineering calculations to verify adequacy of ampacity and short circuit bracing/breaker interrupting rating of generator switchgear
Oroville, California
Thermalito Microfiltration Plant
The existing water treatment plant at Thermalito consisted of a raw water pump station, a 6 MGD pressure filter system, a treatment building, hypochlorite tanks, a one million gallon clearwell, and two unlined settling ponds. Operating at a capacity of 3MGD, there were two banks, each with three pressure filters. This project involved expanding the system
through the installation of a 4MGD microfiltration plant, capable of delivering 4.5-4.8MGD for sustained periods. EETS was tasked with designing the microfiltration plant:
The existing water treatment plant at Thermalito consisted of a raw water pump station, a 6 MGD pressure filter system, a treatment building, hypochlorite tanks, a one million gallon clearwell, and two unlined settling ponds. Operating at a capacity of 3MGD, there were two banks, each with three pressure filters. This project involved expanding the system through the installation of a 4MGD microfiltration plant, capable of delivering 4.5-4.8MGD for sustained periods. EETS was tasked with designing the microfiltration plant:
- Design the plant such that once operational, one of the two banks of pressure filters will be in standby mode and the other for emergency use only, with the discharger utilizing their supply wells to meet demand when it exceeds the microfiltration plant's capacity but is less than 6MGD
- Design connection to existing pressure filter plant
- Design all controls, power, and instrumentation work
- Interface with existing filter controls
- Conduct phasing surveys/engineering studies
- Integration of plant-wide HMI systems
Solano Prison
Water Treatment Plant
Upgrade the electrical and instrumentation systems at the Solano Prison water treatment plant to enhance operations. The design incorporated the following features:
- Replaced two existing starters with Variable Frequency Drives (VFDs).
- Provided one level transmitter, two modulating electro-pneumatic operators, a control panel (equipped with PLC, Operator Interface Terminal (OIT), and SCADA equipment), and portions of the control wiring, conduits, and junction boxes serving the existing chlorine injector.
- Coordinated the integration of third-party control panel hardware and instrumentation controls with the existing facility control system.