IWA Publishing
 IWA Publishing Journals   Subscriptions   Authors   Users   Librarians   FAQs 

Water Science & Technology Vol 47 No 10 pp 155–162 © IWA Publishing 2003

Process water treatment at the Ranger uranium mine, Northern Australia

H. Topp*, H. Russell**, J. Davidson***, D. Jones****, V. Levy*****, M. Gilderdale******, G. Davis*******, R. Ring********, G. Conway*********, P. Macintosh********** and L. Sertorio***********

*ERA Pty Ltd, Jabiru, NT, Australia
**ERA Pty Ltd, Jabiru, NT, Australia
***ERA Pty Ltd, Jabiru, NT, Australia
****EWL Sciences Pty Ltd, PO Box 39443, Winellie NT 0821, Australia (E-mail: david.jones@ewlsciences.com.au)
*****EWL Sciences Pty Ltd, PO Box 39443, Winellie NT 0821, Australia
******Rio Tinto Technical Services, 111 Coventry Street South, Melbourne, Vic 3205, Australia
*******Rio Tinto Technical Services, 111 Coventry Street South, Melbourne, Vic 3205, Australia
********Environment Division, ANSTO, PMB1 Menai, NSW 2234, Australia
*********Environment Division, ANSTO, PMB1 Menai, NSW 2234, Australia
**********Occtech Engineering, PO Box 8407, Perth, WA 6489, Australia
***********Occtech Engineering, PO Box 8407, Perth, WA 6489, Australia


ABSTRACT
The conceptual development and piloting of an innovative water treatment system for process water produced by a uranium mine mill is described. The process incorporates lime/CO2 softening (Stage 1), reverse osmosis (Stage 2) and biopolishing (Stage 3) to produce water of quality suitable for release to the receiving environment. Comprehensive performance data are presented for each stage. The unique features of the proposed process are: • recycling of the lime/CO2 softening sludge to the uranium mill as a neutralant, • the use of power station off-gas for carbonation, • the use of residual ammonia as the pH buffer in carbonation; and • the recovery and recycling of ammonia from the RO reject stream.

Full article (PDF Format)


eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00)
All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment