Enhancing the hydrolysis and methane production potential of mixed food waste by an effective enzymatic pretreatment
Kiran, Esra Uçkun
Trzcinski, Antoine Prandota
Date of Issue2015
School of Civil and Environmental Engineering
Nanyang Environment and Water Research Institute
In this study, a fungal mash rich in hydrolytic enzymes was produced by solid state fermentation (SSF) of waste cake in a simple and efficient manner and was further applied for high-efficiency hydrolysis of mixed food wastes (FW). The enzymatic pretreatment of FW with this fungal mash resulted in 89.1 g/L glucose, 2.4 g/L free amino nitrogen, 165 g/L soluble chemical oxygen demand (SCOD) and 64% reduction in volatile solids within 24 h. The biomethane yield and production rate from FW pretreated with the fungal mash were found to be respectively about 2.3 and 3.5-times higher than without pretreatment. After anaerobic digestion of pretreated FW, a volatile solids removal of 80.4 ± 3.5% was achieved. The pretreatment of mixed FW with the fungal mash produced in this study is a promising option for enhancing anaerobic digestion of FW in terms of energy recovery and volume reduction.
DRNTU::Engineering::Environmental engineering::Waste management
© 2015 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Bioresource Technology, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.biortech.2015.02.033].