Journal article

The influence of calcium on granular sludge in a full-scale UASB treating paper mill wastewater

DJ Batstone, J Landelli, A Saunders, RI Webb, LL Blackall, J Keller

WATER SCIENCE AND TECHNOLOGY | I W A PUBLISHING | Published : 2002

Abstract

Calcium precipitation can have a number of effects on the performance of high-rate anaerobic performance including cementing of the sludge bed, limiting diffusion, and diluting the active biomass. The aim of this study was to observe the influence of precipitation in a stable full-scale system fed with high-calcium paper factory wastewater. Granules were examined from an upflow anaerobic sludge blanket reactor (volume 1,805 m3) at a recycled paper mill with a loading rate of 5.7-6.6 kgCOD.m(-3).d(-1) and influent calcium concentration of 400-700 gCa m(-3). The granules were relatively small (1 mm), with a 200-400 microm core of calcium precipitate as observed with energy dispersive X-ray spe..

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University of Melbourne Researchers