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Membrane bioreactors vs conventional biological treatment of landfill leachate: a brief review

by H Alvarez-Vazquez, B Jefferson, S J Judd
Journal of Chemical Technology and Biotechnology ()

Abstract

A review of quality and biological treatment of landfill leachate is presented. Conventional ex-situ treatment normally demands multistage process treatment schemes, which may encompass both aerobic and anaerobic technologies alongside chemical precipitation and/or oxidation. This is to be contrasted with the more recent membrane bioreactor technology, which generally demands much reduced pre-and post-treatment and has a much reduced footprint compared with conventional biotreatment. Results are summarised in terms of the key determinant of COD removal for waters characterised in terms of BOD/COD ratio and age. Process operation is characterised with respect to COD strength and loading rate, hydraulic retention time and number of individual unit operations. (C) 2004 Society of Chemical Industry.

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