Sacarificação e Fermentação Simultâneas (SFS)

Na SFS, a hidrólise e a fermentação ocorrem simultaneamente no mesmo reator. Este processo é mais eficiente quando combinado com um pré-tratamento ácido, ou com água líquida sobreaquecida (Balat, 2011). A maior vantagem da SFS é que os açúcares liberados durante a hidrólise enzimática são imediatamente consumidos pelos micro-organismos envolvidos na fermentação, o que conseqüentemente diminui a concentração de produtos inibidores das enzimas (Hahn-Hägerdal et al., 2006). Esta tecnologia tem sido melhorada de modo a incluir a co-fermentação de substratos com múltiplos açúcares, ou seja, a sacarificação simultânea de celulose (em glicose), e de hemicelulose (em xilose), e co- fermentação da glicose e xilose, por micróbios geneticamente modificados presentes no mesmo meio (Lee et al., 2013).

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