18 – 19 September 2017
Kuala Lumpur


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Enirgi Power Storage (EPS) is Australia’s largest recycler of used lead–acid batteries. The company has two battery-recycling facilities, namely, a 70 000 tonne plant at Wagga Wagga that is Australia’s largest plant, and a 30 000 tonne plant in Sydney. The former plant operates as a closed-loop, zero discharge effluent site. The Engitec desulfurisation process is employed together with an in-house method for effluent treatment. The chemical treatment of collected process effluent and stormwater was deemed ineffective to meet strict EPA discharge limits, thus an alternative was required. A series of filtration stages that end in a nano filtration unit has been adopted to achieve the required target for treated water quality. Nano filtration, also known as reverse osmosis, functions by sending pressurized effluent over a membrane that has pores of a selected size. The pressure forces all particles that are smaller than the pore through the membrane so that larger particles remain in the resultant stream of effluent waste.


Matthew Morton
RMT
Plant Metallurgist