Comparison of thermal alkaline pretreatment and zinc acetate-catalyzed methanolysis (MtOH-ZnOAc) for anaerobic digestion of bioplastic waste.

Jayen Aris Kriswantoro, Chen-Yeon Chu, Ting-Rui Chang, Hao-Jen Pai, Chih-Kai Chang, Yi-Pang Chiu

Journal: Bioresource technology 2023;377():128959

PMID: 36965583

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Abstract

The aim of this work was to study the effect of thermal alkaline pretreatment and zinc acetate-catalyzed methanolysis (MtOH-ZnOAc) in biogas production from bioplastic in anaerobic digestion. The pretreated bioplastic with MtOH-ZnOAc performs efficient solubilization and produced 205.7 ± 6.9 mL/g COD, which is higher than thermal alkaline degradation. The mesophilic condition produces more than 79% higher biogas compared with the thermophilic condition with the diluted pretreated bioplastic by 30 times. The kinetic study was well fit the experimental data and showed the correlation between cumulative biogas, production rate, and lag phase with mono- and two-stage system in batch fermentation. The two-stage system produced 315.6 ± 7.7 mL/g COD which was higher 67.2 ± 2.02 than the mono-stage system. Methanosaetaceae predominates among the Archaea, which are primarily responsible for methanogenesis, showing a contribution to a higher biogas production rate.

Address: Ph.D. Program of Mechanical and Aeronautical Engineering, Feng Chia University, Taiwan; Institute of Green Products, Feng Chia University, Taiwan; School of Life Sciences and Technology, Institut Teknologi Bandung (ITB), Indonesia.; Ph.D. Program of Mechanical and Aeronautical Engineering, Feng Chia University, Taiwan; Institute of Green Products, Feng Chia University, Taiwan; Institute of Atmospheric Pollution Research (IIA), CNR, Italy. Electronic address: [email protected].; Institute of Green Products, Feng Chia University, Taiwan; Department of Mechanical and Computer-Aided Engineering, Feng Chia University, Taiwan.; GREAT Biomaterials Co., Ltd., Taiwan.

DOI: 10.1016/j.biortech.2023.128959

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MeSH Terms: Anaerobiosis, Zinc Acetate, Biofuels, Bioreactors, Biopolymers, Catalysis, Methane