Comparison of conventional and alternative technologies for the enzymatic hydrolysis of rice hulls to obtain fermentable sugars

Carbon Dioxide in Biomass Processing: Contributions to the Green Biorefinery Concept

“…They examined rice hulls subjected to this treatment in comparison to those subjected to integrated enzymatic hydrolysis in an ultrasound bath. 103 They found that the addition of high-pressure CO 2 as a cosolvent does not have a positive effect since the maximum yield of fermentable sugars obtained from traditional enzymatic hydrolysis was about 16 g•kg −1 versus 4.2 g•kg −1 obtained when high-pressure CO 2 was added to the saccharification process. Thus, observing data presented in Tables 3 and 4, it can be stated that the promising results obtained for CO 2 -mediated enzymatic conversions presented in the literature should encourage research in this field, mostly due to lower temperature requirements and lack of hazardous solvents.…”

“…Another approach was examined by Moscon et al, who integrated enzymatic hydrolysis under high-pressure CO 2 . They examined rice hulls subjected to this treatment in comparison to those subjected to integrated enzymatic hydrolysis in an ultrasound bath . They found that the addition of high-pressure CO 2 as a cosolvent does not have a positive effect since the maximum yield of fermentable sugars obtained from traditional enzymatic hydrolysis was about 16 g·kg –1 versus 4.2 g·kg –1 obtained when high-pressure CO 2 was added to the saccharification process.…”

Fungal pretreatment of sweet sorghum bagasse with supplements: improvement in lignin degradation, selectivity and enzymatic saccharification

“…2b), which might be due to reduced cellulolytic activities. The cellulose content in SSB pretreated with syringic acid was high, which could provide higher accessibility of carbohydrates for enzymatic saccharification and sugar yield (Moscon et al 2014). In the case of CuSO 4, SV was highest till 12 days and thereafter declined (Fig.…”

Hydrolysis of agricultural waste to obtain reducing sugars using conventional and ultrasound-assisted technologies

“…For this purpose, the methodology of experimental design was used to optimize the temperature, moisture content and concentration of phosphoric acid on the yield of reducing sugar in the presence and absence of ultrasound irradiation. All reactions were carried in the absence or near absence of free water, resulting in minimum water consumption and a low effluent production, which is defined as solid-state hydrolysis (Pandey, 2003;Moscon et al, 2014).…”