PROJECT: 500m3 Sludge Tank Upgrade. MTL ROLE: Two 250 cubic metre capacity tanks were required as part of the sludge handling upgrade works at Watercare Services Ltd, Ardmore Water Treatment Plant. MTL undertook investigations to establish the most suitable concept design, prepared and completed the detailed design of the stainless steel tanks. Elevated structural steel [...]
PROJECT: Two 150m3 Sludge Thickener Balance Tanks. MTL ROLE: Watercare required two new in ground sludge balance tanks to be constructed at their Ardmore Water Treatment Plant. The site for the tanks, located on steeply sloping and poor ground, posed significant design challenges. MTL undertook the detailed design of the reinforced concrete water retaining structures [...]
PROJECT: Mobile CO2 Dosing Skids for potable water pH control. MTL ROLE: Watercare identified the need for two mobile CO2 Dosing units for temporary deployment to ensure potable water pH compliance with NZDWS as new concrete lined steel watermains are entered into service. MTL provided ‘fast-track’ process and mechanical design, project management and commissioning services [...]
PROJECT: 260 MLD A Block Filtered Water UV Disinfection for Ardmore Water Treatment Plant. MTL ROLE: MTL led the design of a 260 MLD UV Disinfection system retrofit of the A Block filtered water stream (~70% of maximum plant production) Three new 33% duty Wedeco K Series K143 reactors are located inside the existing Chemical [...]
PROJECT: 8 MLD Treated Water Pump Station. MTL ROLE: The Warkworth Wells Water Treatment Plant is designed for future growth with initial production of 3 MLD with staged increases to 8 MLD average daily flow (ADF). MTL undertook the treated water pump station and network tie in design to accommodate the initial capacity while providing [...]
PROJECT: Replacement Centrifuges to support 126 MLD Potable Water Production. MTL ROLE: MTL led the project team for Watercare’s Sludge Dewatering Centrifuge Upgrade at the Huia Water Treatment Plant. The upgrade saw the replacement of the existing Centrifuges with new higher capacity ‘fully automated’ Decanting Centrifuges and Thickened Sludge Feed system upgrades to support 126 [...]
PROJECT: Mangere Wastewater Treatment Plant BNR & SSU Upgrade. MTL ROLE: MTL has provided engineering support for the Mangere WWTP Biological Nutrient Removal (BNR) and Solid Stream Unit (SSU) Upgrade projects from 2012 to the present including: Secondment of personnel to Watercare for Owner’s Engineer roles including procurement support, project and contract managementProject enabling and [...]
PROJECT: 58 MLD Wastewater Pump Station Upgrade. MTL ROLE: MTL were engaged by McConnell Dowell for the mechanical (tender) design for the upgrade of the second dry well to accommodate higher capacity pumps with a wider flow range (24 MLD – 58 MLD). The Hobsonville pump station building was constructed approximately 10 years ago, but [...]
PROJECT: 40 MLD Fairview PS Transient Investigation and Upgrade. MTL ROLE: A significant pressure transient caused the Glenvar watermain to rupture and also damaged valves and piping within the Fairview Ave Pump Station. Watercare engaged MTL to provide technical leadership and develop the interim and permanent repair scope. Hytran pressure transient modelling of the local [...]
Project: 3MLD ground source Water Treatment Plant expandable to 8MLD. MTL Role: As lead designer MTL were responsible for developing the concept design into fully detailed construction drawings for the water treatment plant and rising mains. The flexible design allows the plant to be upgraded in future, with minimal disruption and reduced capital costs, to [...]
