Projects
Filters
2019
During 2019 the District continued to run and optimize the coagulant addition and cartridge filtration systems installed in 2018 – as outlined in last year’s Newsletter. Although the cartridge filtration system consistently produced very good quality water, a key finding of the optimization work was that the filtration system required frequent cartridge replacement and operator attention, especially during the summer. In response to the issue of frequent cartridge replacement, we installed a temporary manually operated sand filter in the summer to back-up the cartridge filters. The performance of sand filter has been very good to the point that our plan for 2020 is to install a new fully automated sand filter system to replace the temporary system. This will require a building to house the filter, instrumentation and pumps as well as an additional small tank with associated piping. During 2019 the District continued to run and optimize the coagulant addition and cartridge filtration systems installed in 2018 – as outlined in last year’s Newsletter. Although the cartridge filtration system consistently produced very good quality water, a key finding of the optimization work was that the filtration system required frequent cartridge replacement and operator attention, especially during the summer. In response to the issue of frequent cartridge replacement, we installed a temporary manually operated sand filter in the summer to back-up the cartridge filters. The performance of sand filter has been very good to the point that our plan for 2020 is to install a new fully automated sand filter system to replace the temporary system. This will require a building to house the filter, instrumentation and pumps as well as an additional small tank with associated piping.
2018
Following-on from water quality upgrade and automation programs carried out in previous years, we installed a cartridge filtration system in June. This system has greatly improved water quality to the consumers and should reduce sediment accumulation in our main lines. Since the summer we have continued to test different filter cartridge types and configurations to optimize performance both in terms of water quality and operating life of the cartridges. To further improve filtration we installed a coagulant addition system in the fall. This measure, in conjunction with filtration, will help us achieve our objectives for final water quality. We will continue to optimize the filtration and the coagulant systems in 2019.
2019
During 2019 the District continued to run and optimize the coagulant addition and cartridge filtration systems installed in 2018 – as outlined in last year’s Newsletter. Although the cartridge filtration system consistently produced very good quality water, a key finding of the optimization work was that the filtration system required frequent cartridge replacement and operator attention, especially during the summer. In response to the issue of frequent cartridge replacement, we installed a temporary manually operated sand filter in the summer to back-up the cartridge filters. The performance of sand filter has been very good to the point that our plan for 2020 is to install a new fully automated sand filter system to replace the temporary system. This will require a building to house the filter, instrumentation and pumps as well as an additional small tank with associated piping. During 2019 the District continued to run and optimize the coagulant addition and cartridge filtration systems installed in 2018 – as outlined in last year’s Newsletter. Although the cartridge filtration system consistently produced very good quality water, a key finding of the optimization work was that the filtration system required frequent cartridge replacement and operator attention, especially during the summer. In response to the issue of frequent cartridge replacement, we installed a temporary manually operated sand filter in the summer to back-up the cartridge filters. The performance of sand filter has been very good to the point that our plan for 2020 is to install a new fully automated sand filter system to replace the temporary system. This will require a building to house the filter, instrumentation and pumps as well as an additional small tank with associated piping.
2018
Following-on from water quality upgrade and automation programs carried out in previous years, we installed a cartridge filtration system in June. This system has greatly improved water quality to the consumers and should reduce sediment accumulation in our main lines. Since the summer we have continued to test different filter cartridge types and configurations to optimize performance both in terms of water quality and operating life of the cartridges. To further improve filtration we installed a coagulant addition system in the fall. This measure, in conjunction with filtration, will help us achieve our objectives for final water quality. We will continue to optimize the filtration and the coagulant systems in 2019.
Water Quality Improvements / PLC Well Pump Control
2017
The goal of this project was to improve the water quality supplied to the District water users by;
2017
The goal of this project was to improve the water quality supplied to the District water users by;
- increasing the settling ability of the storage tanks
- monitoring and more finely controlling residual chlorine levels
- monitoring turbidity levels
- the addition of primary and secondary tank piping re-circulation loops
- the addition of flow controlled chlorine (bleach) delivery for incoming well water
- the addition of 2 metering pumps to ensure chlorine residual levels in the primary and secondary tanks are kept at desired levels.
- the addition of a new bleach (chlorine) tank that uses 6% (more stable) chlorine bleach
- the addition of a pressure transmitters based tank level system to allow more flexibility in managing tank levels and well pump operation
- the addition of pipework and valves to allow 4 of the 6 tanks to be used for primary settling
- completion of the remote access programmable logical control (PLC) system. We now have full remote access and control of our system via our computers or smart phones and receive text and email alerts from the PLC when readings and process variables are outside the expected range
ON-LINE CHLORINE ANALYSER:
CONTROL SYSTEM DASHBOARD:
ON-LINE TURBIDITY METER:
Feed Line Replacement and Upgrades 2016 - 2017
This project involves the replacement of undersized PVC pipework running between the pumps and the tank farm with larger diameter HDPE pipework with electrofusion couplings.
The thin wall, small diameter PVC pipework in place was failing when all the pumps were running. The new thick wall HDPE pipe will not fail if we add additional pumps and will likely not fail in a seismic event. Power cables and the signal lines have also been replaced.
Tank Farm Upgrade 2014 - 2015
The Tank Farm Upgrade project involved the addition of two new tanks as well as the replacement of two old steel tanks. The changes resulted in a total of 6 installed 15,000 US gallon polyethylene tanks.
In addition, the PVC pipework which inter-connects the tanks, the pump feed line and the distribution line were replaced with HDPE pipe and Victaulic fittings. This HDPE pipework along with the seismic restraints and cabling for the tanks provides a high level of protection in a seismic event.
The tanks have been configured in way that two provide initial settling prior to water being stored in the four secondary tanks. These primary tanks have manholes to allow for easy clean out.