Crews have completed installing the steel platforms over the Dissolved Air Flotation plant (DAF) while work continues on the DAF wall structure along and installing mechanical and electrical systems in the pump and plant room.

Other core milestones over the last month include:
• Second CO2 tank commissioned and now in service.
• Structural remediation has been completed for Filter 1 and new nozzles and first media layers installed.

In the background there is also a lot of work going on with planning the commissioning of the upgrades and working with suppliers and the existing plant operators on handover, maintenance and operational documents.

Check out the activity here

Over the next few weeks. the crews will be very busy including completing the DAF wall structure, along with finishing installation of all steel platforms, canopies and continuing electrical installation in the pump and plant room. Filter 1 media installation will be completed and commissioning started. 

Work is also underway on the ‘dosing packages’ which include upgrading the systems and equipment that are used to treat and clean the water. This includes coagulants that  help tiny particles in the water stick together in little clumps, and flocculants that help these little clumps stick together even more forming large ‘flocs’.  These either  sink to the bottom of a clarifier or stick to the air bubbles in the DAF and float to the surface as foam that can be scraped off and collected as DAF sludge.

After coagulated and flocculated particles are removed in a clarifier or DAF, clarified water is sent to the filters where the process of producing clean water is now significantly easier! 

Source: Wellington Water

29/10/24