Evaluation of o-cresol removal using PVA-cryogel-immobilised biomass enhanced by PAC

Abstract

The biological treatment of phenolic compounds has always made use of suspended biomass systems (Murialdo et al., 2001; Papadimitriou et al., 2009; Durruty et al., 2011; Leong et al., 2011; Lim et al., 2013a; Lim et al., 2013b). However, the common disadvantages associated with the use of this kind of system include a large reactor size requirement to obtain higher biomass amounts, and the occurrence of a biomass settling problem. In order to overcome these problems, the immobilised biomass system has been introduced and is gaining popularity in various wastewater treatment processes (Ratusznei et al., 2000; González et al., 2001; Chen et al., 2002; Kariminiaae et al., 2003; Kuo and Shu, 2004). This system can not only sustain high biomass concentrations but is also able to reduce the bulking effect, as the biomass is entrapped in the polymeric matrices (Petruccioli et al., 2000; Lee et al., 2004; Chen et al., 2005).

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