Journal article

Ultrasonic pretreatment of food waste to accelerate enzymatic hydrolysis for glucose production

Xiaotong Li, Srinivas Mettu, Gregory JO Martin, Muthupandian Ashokkumar, Carol Sze Ki Lin



Recovering valuable materials from food waste by applying the concept of a bio-refinery is attracting considerable interest. To this effect, we investigated the possibility of enhancing the enzymatic hydrolysis of food waste using ultrasonic technology. The effect of pre-treating blended food waste with high-intensity ultrasound (20 kHz) on subsequent hydrolysis by glucoamylase was investigated as a function of sonication time and temperature. Particle sizing by laser diffraction, and imaging via scanning electronic microscopy showed that ultrasonic pre-treatment could reduce the particle size of the blended food waste significantly, resulting in a better interaction with the enzyme. As a co..

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Awarded by Australian Research Council (ARC)

Funding Acknowledgements

Dr. Srinivas Mettu, Dr. Greg Martin and Prof. Muthupandian Ashokkumar thank the Australian Research Council (ARC) for providing funding through the Discovery Project DP170103791 and the University of Melbourne for providing infrastructure support. The authors are also grateful to Dr. George Chen from the Department of Chemical Engineering at the University of Melbourne for HPLC analysis.