Biomethane production by typical straw anaerobic digestion: Deep insights of material compositions and surface properties

Xiaohu Dai; Yu Hua; Rui Liu; Shuxian Chen; Huiping Li; Lingling Dai; Chen Cai

doi:10.1016/j.biortech.2020.123643

Biomethane production by typical straw anaerobic digestion: Deep insights of material compositions and surface properties

Bioresour Technol. 2020 Oct:313:123643. doi: 10.1016/j.biortech.2020.123643. Epub 2020 Jun 10.

Authors

Xiaohu Dai¹, Yu Hua², Rui Liu², Shuxian Chen², Huiping Li³, Lingling Dai¹, Chen Cai⁴

Affiliations

¹ State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
² State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
³ College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
⁴ State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address: caic@tongji.edu.cn.

PMID: 32540695
DOI: 10.1016/j.biortech.2020.123643

Abstract

Straws as lignocellulosic agricultural biomass have a huge amount and are widely used for biomethane production by anaerobic digestion (AD). However, the mechanism of impacts of straw composition and surface properties on biomethane production remain unclear. Here, a lab-scale AD incubation experiment was conducted and the characterization of four types of straws (corn straw, wheat straw, sweet sorghum straw, and rice straw) were also determined. The straw compositions and net cumulative methane production showed significant difference. Although the relative contents of key organic components and carbon had no significant correlation to the biomethane production (r = -0.36, P > 0.05), there existed differences of non-polar characteristics, steric hindrance effect and special surface morphology in four types of straws, indicating that the surface characteristics affected anaerobic biomethane production process. In addition, the straw matrix associating with silicon might hinder the biotransformation.

Keywords: Anaerobic digestion (AD); Material composition; Surface property; Typical straw.

MeSH terms

Anaerobiosis
Biofuels*
Biomass
Methane*
Surface Properties

Substances

Biofuels
Methane