Journal article

High-solid anaerobic co-digestion of pig manure with lignite promotes methane production

Hai-Gang Guo, Qing-Lin Chen, Hang-Wei Hu, Ji-Zheng He

Journal of Cleaner Production | ELSEVIER SCI LTD | Published : 2020

Abstract

High-solid anaerobic digestion is a common practice to treat organic wastes, but its efficiency of methane production is poor. In this study, the effect of high-solid anaerobic co-digestion (HS-AcoD) of pig manure with lignite (0%–64% based on total solid) on methane production at 37 °C was investigated. The results showed that pH, alkalinity, total ammonia nitrogen, and free ammonia decreased with the increasing ratios of lignite addition during HS-AcoD. After HS-AcoD for 30 days, the highest cumulative methane yield of 175.90 mL g volatile solid was obtained for the treatment with 2% lignite addition, which was 9.26% higher compared with the control treatment without lignite addition (CK)..

View full abstract

Grants

Awarded by National Natural Science Foundation of China


Awarded by Australia-China Joint Research Centre of Healthy Soils for Sustainable Food Production and Environmental Quality


Awarded by Key Research and Program of Hebei


Funding Acknowledgements

This study was supported by National Natural Science Foundation of China (41907206), the Australia-China Joint Research Centre of Healthy Soils for Sustainable Food Production and Environmental Quality (ACSRF48165), and Key Research and Program of Hebei (31823701D). We acknowledge the Melbourne Trace Analysis for Chemical, Earth and Environmental Sciences (TrACEES), The University of Melbourne for analytical support.