Wastewater Treatment Plant – Digester Cleaning in South Australia

NPE was engaged by Fulton Hogan to undertake the full cleaning of Digester #6 at the Bolivar Wastewater Treatment Plant – South Australia’s largest treatment facility of its kind located in Adelaide’s northern suburbs. NPE commenced works in early January 2026, with all elements delivered on schedule in mid March 2026.

The works involved the complete pumping and cleaning of the digester using NPE’s specifically designed submersible pump and HPU, along with the installation of all suction and discharge piping. NPE managed every aspect of the cleaning process, including working at heights, confined space entry, and coordination of a contract crane provider, with a 65‑tonne crane positioned onsite throughout the pumping phase. The team also oversaw vacuum truck operations and waste disposal, ensuring the digester was thoroughly cleaned and fully sanitised by project completion.

This project was a strong demonstration of collaboration across the NPE network, with specialist support provided by branches in Melbourne, Sydney, and Brisbane, highlighting the capability and reach of the wider East Coast team.