10.5. Methods for enhancing the efficiency of anaerobic digestion
10.5.1. Pretreatments
The hydrolysis of substrate into soluble organics is the rate-limiting step for AD (Zhang et al., 2014). As a result, AD often suffers from long solid residence time and low conversion efficiency (Quiroga et al., 2014). Therefore, the effects of different pretreatment methods such as mechanical, thermal, chemical and enzymatic pretreatments have been investigated for improving the hydrolysis of biomass.
10.5.1.1. Mechanical pretreatments
Mechanical pretreatment is usually required for high solid content feedstocks before any other kind of pretreatment, and actually refers to milling, through which particle size reduction of feedstocks is accomplished. Mechanical ...
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