Fungal solubilisation and subsequent microbial methanation of coal processing wastes

Journal article


Ahmed, Asma and Sharma, Anima 2021. Fungal solubilisation and subsequent microbial methanation of coal processing wastes. Applied Biochemistry and Biotechnology. https://doi.org/0.1007/s12010-021-03681-y
AuthorsAhmed, Asma and Sharma, Anima
AbstractLarge quantities of rejects from coal processing plants are currently disposed of as waste piles or in ponds and rivers, resulting in environmental concerns including pollution of rivers, and ground and surface water contamination. This work investigates for the first time, a two-stage microbial process for converting coal processing wastes (coal rejects) to methane, involving (1) fungal solubilisation of coal rejects and (2) microbial methanation of the solubilised products. Phanerochaete chrysosporium, Trichoderma viride and Neurospora discreta were screened for their ability to solubilise coal rejects. N. discreta was found to be the most suitable candidate based on the extent of bio-solubilisation, laccase activity and reversed-phase high-performance liquid chromatography (RP-HPLC) analysis. Bio-methanation of fungal-solubilised coal rejects was carried out in mesophilic anaerobic reactors with no additional carbon source, using inoculum from an anaerobic food digester. Coal rejects solubilised by N. discreta produced 3- to 6-fold higher methane compared to rejects solubilised by the other two fungi. No methane was produced from untreated coal rejects, demonstrating the importance of the fungal solubilisation stage. A total of 3.7 mmol of methane was generated per gram of carbon in 15 days from N. discreta-solubilised coal rejects. This process offers a timely, environment-friendly, and sustainable solution for the treatment of coal rejects and the generation of value-added products such as methane and volatile fatty acids.
KeywordsCoal processing waste; Coal rejects; Coal fungal solubilisation; Coal bio-methanation; Neurospora discreta
Year2021
JournalApplied Biochemistry and Biotechnology
PublisherSpringer
Research Square Platform LLC
ISSN0273-2289
Digital Object Identifier (DOI)https://doi.org/0.1007/s12010-021-03681-y
https://doi.org/10.21203/rs.3.rs-612910/v1
Official URLhttps://link.springer.com/article/10.1007/s12010-021-03681-y#citeas
http://rdcu.be/cx8pD
Publication dates
Online20 Sep 2021
Publication process dates
Accepted08 Sep 2021
Deposited22 Sep 2021
Accepted author manuscript
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All rights reserved
File Access Level
Open
Output statusPublished
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