Sizing criteria for a low footprint passive mine water treatment system

Sapsford, Devin James ORCID: https://orcid.org/0000-0002-6763-7909 and Williams, Keith Philip 2009. Sizing criteria for a low footprint passive mine water treatment system. Water Research 43 (2) , pp. 423-432. 10.1016/j.watres.2008.10.043

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Abstract

The objective of this paper is to present data from a novel vertical flow mine water treatment system, demonstrate how these data can be used to generate sizing formulae for this technology, and present a comparison between the size of system based on these formulae and those of conventionally designed passive systems. The paper focuses on passive treatment of circum-neutral ferruginous mine waters bearing up to 50 mg l−1 of iron in either ferrous or ferric form. The Vertical Flow Reactor (VFR) operates by passing mine water down through an accreting bed of ochre, the ochre bed being responsible for the intensification of iron removal by self-filtration and/or autocatalytic iron oxidation and precipitation. Key to the design and operation of the VFR system is the decrease in permeability in this ochre bed over time. The paper demonstrates that the VFR system can remove iron at many times the 10 g/m2/day removal rate – an often employed figure for the sizing of aerobic settling ponds and wetlands. The paper demonstrates that VFRs are viable and novel passive treatment system for mine waters with a smaller footprint than conventional systems.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TD Environmental technology. Sanitary engineering
Uncontrolled Keywords:	Iron; Mine; Water; Treatment; Oxidation; Sizing
Publisher:	Elsevier
ISSN:	0043-1354
Last Modified:	17 Oct 2022 10:27
URI:	https://orca.cardiff.ac.uk/id/eprint/8087

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