Binary and ternary trace elements to enhance anaerobic digestion of cattle manure: Focusing on kinetic models for biogas production and digestate utilization

Kaijun Wang; Sining Yun; Tian Xing; Bingjie Li; Yasir Abbas; Xinming Liu

doi:10.1016/j.biortech.2020.124571

Binary and ternary trace elements to enhance anaerobic digestion of cattle manure: Focusing on kinetic models for biogas production and digestate utilization

Bioresour Technol. 2021 Mar:323:124571. doi: 10.1016/j.biortech.2020.124571. Epub 2020 Dec 31.

Authors

Kaijun Wang¹, Sining Yun², Tian Xing³, Bingjie Li³, Yasir Abbas³, Xinming Liu³

Affiliations

¹ Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China; College of Science, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.
² Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China. Electronic address: yunsining@xauat.edu.cn.
³ Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.

PMID: 33388599
DOI: 10.1016/j.biortech.2020.124571

Abstract

The effects of binary and ternary trace elements (TEs) (Fe/Co, Fe/Ni, and Fe/Co/Ni) on the anaerobic digestion (AD) of cattle manure were investigated using kinetic models (first-order, logistic, modified Gompertz, and Coats-Redfern) and experimental measurements. Binary and ternary TEs can significantly improve the biogas production rate and yield potential. The deviation between the predicted and measured data for biogas yield with logistic model (2.1%-5.3%) and modified Gompertz model (0.32%-2.9%) was smaller than that with first-order kinetic model (6.9%-9.9%). The Coats-Redfern model fitting indicated that the activation energy of digestates with trace elements during pyrolysis was reduced by 3.9%-26.2% compared with the control group. Meanwhile, digestates with TEs showed remarkable fertility (5.72%-5.95%). The combination of kinetic models and experimental measurements can effectively quantify the effect of TEs on AD performance and provide an informed choice for industrial production.

Keywords: Anaerobic digestion; Fertility; Kinetic model; Thermal analysis; Trace elements.

MeSH terms

Anaerobiosis
Animals
Biofuels
Bioreactors
Cattle
Manure*
Methane
Trace Elements*

Substances

Biofuels
Manure
Trace Elements
Methane