A series of requirements was packaged together as the Bolivar WWTP Priority Works Framework.
Waternish was able to deliver value, with the fundamental principle of providing the ‘right product/service for the process/application every time’.
- SA Water
- Project Completion
- April 2020
SA Water places great emphasis on the role of the supply chain to deliver its business needs. As part of this strategy, a key objective is to select and work with suppliers to deliver cost-effective solutions in conjunction with the operational side of the business, consultants, other contractors and suppliers.
To this end, a series of requirements were packaged together as the Bolivar WWTP Priority Works Framework.
Waternish was able to deliver value, both in capital and revenue terms, with the fundamental principle of providing the ‘right product/service for the process/application every time’ demonstrating its flexibility to adapt to the changing needs of SA Water.
The Priority Works Framework consisted of six separate packages of work, enabling Waternish to provide an overarching structure that could collaboratively manage safety, design, stakeholders, and resourcing, and closeout facets of the project in a coordinated manner to provide measurable outcomes for SA Water.
The individual packages included:
- Refurbishment of seven clarifiers, which included detailed design, demolition, concrete repair, installation of process equipment and instrumentation, management of electrical and SCADA contractor and commissioning.
- Detailed design and installation of a new scraper system in PST 1 including the management of the equipment selection process and associated stakeholder coordination, demolition, structural steel procurement and installation, installation of process equipment and instrumentation, management of electrical and SCADA contractor and commissioning.
- Replacement of the existing liquid chlorine system which included the detailed design of new pressure relief systems, evaporators, and vacuum regulators as well as associated pipework, valves and instrumentation. A new control system, chlorine solution distribution, and service water supply system was also put in place to allow the benefits of the new liquid system to be realised across a larger part of the DAFF process.
- Demolition of existing lead jointed cast iron sludge pipe and replacement with new flanged stainless steel pipework in the digester area, which included the installation of a temporary bypass to allow full operation during the construction process. Leaking inline valves were also replaced as well as new valves installed to provide greater operational flexibility. All design and drafting were undertaken internally.
- Detailed design and upgrade of the existing inlet works to provide a greater level of automated cleaning to existing drum screens, upgrade of inlet and outlet penstocks and a number of modifications to improve the safety of the work environment for operations staff as well as increase the overall reliability of the works.
- Completion of the Windrow Turner Building including the installation of fire and security services and completion of a wash-down bay. Additional scope included the design and construction of a new self-priming swale pump station (duty point 30 LPS @ 13m) and a new booster system for the wash-down bay and sludge dewatering service water system.