Effect of white rot fungi pretreatment on methane production from anaerobic fermentation of coal

Authors

ZHANG Huaiwen, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
HUANG Song, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
YAN Xiatong, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
ZHAO Shufeng, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
ZHANG Minglu, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
XIA Daping, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, ChinaFollow

Abstract

To investigate the effect of white rot fungi pretreatment on methane production from anaerobic fermentation of coal, fermentation experiments of biogas production were conducted using long flame coal. The coal samples pretreated with white rot fungi were the experimental group(EG), and original untreated coal samples were the control group(CG). The COD(chemical oxygen demand) mass concentration, activity of coenzyme F420, and changes of coal morphology were measured using potassium dichromate method, ultraviolet spectrophotometry, and SEM, respectively. The results showed the following: The total gas production and conversion rate in the EG and CG were 2 322.00 mL and 5.10%, 1 330.20 mL and 4.70%, respectively. Moreover, the hydrolysis stage in the EG was significantly shorter than that in the CG. The COD value in the EG and CG was 32-176 mg/L and 576- 609 mg/L, respectively, and the degradation of EG was more thorough. The maximum value of coenzyme F420 in the EG and CG was 0.011 72 μmol/L and 0.007 97 μmol/L, respectively, and its activity was effected by TOC(total organic carbon) content and acid-producing bacteria. At the end of pretreatment and gas produciton, the roughness of the coal surface in the EG was stronger, the adsorption sites and adsorption capacity of microorganisms were also more high, and accompanied by the generation of bacterioflora. This test research demonstrates the advantages and adaptability of biological pretreatment with white rot fungi, which is beneficial to the industrialization utilization of biogas resources in coal.

Keywords

long flame coal, biological pretreatment, white rot fungi, anaerobic fermentation, methane, Qianqiu coal mine of Yima in Henan

DOI

10.3969/j.issn.1001-1986.2020.02.019

Recommended Citation

ZHANG Huaiwen, HUANG Song, YAN Xiatong, et al. (2020) "Effect of white rot fungi pretreatment on methane production from anaerobic fermentation of coal," Coal Geology & Exploration: Vol. 48: Iss. 2, Article 20.
DOI: 10.3969/j.issn.1001-1986.2020.02.019
Available at: https://cge.researchcommons.org/journal/vol48/iss2/20

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