Impact of antibiotics on methane produced from cellulose

Author:

Zhu Qili12ORCID,Maeda Toshinari2,Chen Chenghan1,Wang Yanwei1,Tan Furong1,Hu Guoquan1,He Mingxiong1

Affiliation:

1. Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs 1 , Chengdu 610041, People's Republic of China

2. Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology 2 , 2-4 Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan

Abstract

Enhancing production of methane from cellulose is of utmost importance to improve the fermentation efficiency of lignocellulosic biomass. Antibiotics have demonstrated their ability to stimulate anaerobic digestion (AD) by influencing micro-organism activity. However, there has been limited research on the specific effect of antibiotics on cellulose AD. In this study, we investigated the impact of three antibiotics—tetracycline (TC), cephalexin (CLX), and azithromycin (AZM)—on cellulose AD when inoculated with waste sewage sludge. The results revealed that the presence of AZM and TC led to significantly higher methane yields, with increases of 51.94% and 34.96%, respectively, during a 20-day AD period. In contrast, the presence of CLX resulted in a 23.95% lower methane yield compared to the control. Furthermore, detailed analyses indicated that AZM had a positive influence on cellulose AD at all stages, including methanogenesis, acidogenesis/acetogenesis, and hydrolysis. On the other hand, TC primarily promoted AD during the methanogenesis stage. These findings collectively offer valuable guidance for efficiently transforming the energy potential of lignocellulosic wastes.

Funder

Key Research and Development Program of Sichuan Province

Agricultural Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences

Central Public-Interest Scientific Institution Basal Research Fund

Publisher

AIP Publishing

Subject

Renewable Energy, Sustainability and the Environment

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