Moreover the content of non-dissolved solids
was much lower in enzymatically pretreated waste bread slurriesin comparison to microwave, ultrasonic and unpretreated variants
of the experiment, what suggests that application of relatively
low-temperature and short time enzymatic hydrolysis (unlike in
the SHF process) of waste bread for direct conversion to ethanol
using GSHE could be used in fermentation of media at higher solids
loading than in present study (150 g kg1) avoiding the problem of
water binding capacity of raw material. Montalbo-Lamboy et al