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Mine Water Treatment by Membrane Filtration Processes – Upscale Experiments

The worlds’ diminishing water resources together with stricter environmental legislation lead to the development of new technologies for the treatment of water for mining activities. In arid and remote mining areas a promising approach is the integration of membrane technology into state of the art mine water treatment processes. Reverse Osmosis (RO) as well as the lower pressure nanofi ltration (NF) may be suitable operations to be considered. Recently an NF membrane identifi ed in previous tests was subject to further investigation in two upscale modules. The acidic water, containing sulphate and a variety of metals, was fed into a disc- and a Spacer Tube® spiral wound module in recycle mode. The setup was tested at different working points over 145 h for each run. The results show applicability of NF for desalination of AMD under the mentioned conditions. No visible drop in permeate fl ux was observed, although some scaling occurred.

Stricter environmental legislation, together with the worlds’ diminishing water resources lead to the development of new technologies for the treatment of water from mining activities. In arid and remote mining areas a promising approach is the integration of membrane technology into state-of-the-art mine water treatment processes. The proven reverse osmosis (RO) as well as the lower pressure nanofi ltration (NF) may be suitable operations to be considered. In previous experiments, several reverse osmosis and nanofi ltration membranes were screened with reference water of low pH and with high sulphate and metal content to identify a suitable membrane with satisfactory multivalent ion-retention and flux.

Copyright:	© Vulkan-Verlag GmbH
Source:	GWF international 2011 (September 2011)
Pages:	6
Price inc. VAT:	€ 6,00
Autor:	Dipl.-Ing. Paul Steinberger Dipl.-Ing. Nadine Siebdrath Dipl.-Ing. André Rieger Dr.rer.nat. Roland Haseneder Dipl.-Ing. Yun Zeng
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