Merrimac Recycled Water Treatment Plant
About the project
Pensar was engaged by the City of Gold Coast for the design and construction of a new 5ML/day Recycled Water Treatment Plant within the existing Merrimac Sewerage Treatment Plant.
This project was delivered utilising Pensar's multidisciplinary offering across our Water, Structures and Power capabilities.
Client & Duration
City of Gold Coast
August 2021 - February 2023
- Air-conditioned analyser building with new analysers, comms marshalling panel & process DB
- Two new concrete reservoirs (440KL & 220KL) with new roofs, access platforms, access hatches, stairway and access ladders
- Pump station and pipework to feed new RWTP
- Network pump skid
- New alum storage and dosing area
- New hypo dosing pump skid for RWTP
- Design, supply and install of new PCS cabinet & MLC board
- Dual media horizontal media filter system with UV’s, backwash & air scour systems including 30 actuated valves
- All electrical installation, testing and commissioning
- Upgrade of existing hypo dosing system for the entire STP
- Procurement delays and price increases posed a large challenge for our team to negate with the client. This had a large impact on our Power team which resulted in some major delays to the electrical scope of works. Maintaining an open line of communication on both a project management level, as well as an executive leadership level was a crucial factor in successfully managing these items and upholding a positive working relationship.
- Our team successfully managed the PFAS contaminated material that was a latent condition, confirmed just prior to our workers mobilising on site. Pensar designed and constructed a 3000m3 HDPE lined storage area to store the contaminated materials, which was safely covered and sealed in line with all regulations and requirements.
- Our team worked with the operators on site to minimise disruptions to daily operations. This allowed for early communications for any issues that arose, ultimately offering quick
- Managing the design in-house provided cost and time savings for our client, but also offered more control over final design outcomes.
- The project team was able to work collaboratively to achieve both cost and time savings through the following activities and/or initiatives including procuring stainless steel pipework early and directly via overseas contacts, proposing a simpler actuated valve for the project, a program revision that resulted in the underground pipe install and concrete reservoir construction occurring simultaneously and negotiating discounts for a number of frequently used materials.