Revealing the bacterial community profiles during the degradation of acetone, propionic and hexanoic acids-components of wastewater from the Fischer-Tropsch process.
Int Microbiol 2019;
23:313-324. [PMID:
31758335 DOI:
10.1007/s10123-019-00106-z]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/03/2019] [Accepted: 11/07/2019] [Indexed: 12/24/2022]
Abstract
The Fischer-Tropsch (F-T) process for production of fuels is entrenched in several countries' approach to meeting energy demands. However, the clean water deficit associated with the down-stream processes has made it necessary to explore bioremediation methods to ameliorate the consequences of its use. In this study, a consortium of bacteria was utilized for determination of biodegradation and removal rates, based on reduction in chemical oxygen demand of a mixture of acetone, propionic acid and hexanoic acid (APH) (all components of F-T wastewater), at an organic loading of 5 and 9.53 g CODL-1. The individual degradation efficiencies of the F-T components were determined using a gas chromatograph. Further, the bacterial consortia responsible for the degradation of the mixture of APH were determined using metagenomics data derived from next-generation sequencing. The overall chemical oxygen demand removal was found to be 88.8% and 82.3% at organic loading of 5 and 9.53 g CODL-1, respectively. The optimal degradation efficiency of acetone, propionic acid and hexanoic acid over a period of 10 days was found to be 100%, 85% and 75.8%, respectively. The primary microbial communities presumed to be responsible for APH degradation by phyla classification across all samples were found to be Proteobacteria (55-92%), Actinobacteria (5-33%) and Firmicutes (0.08-9%). Overall, the study has demonstrated the importance of aerobic consortia interactions in the degradation of components of the F-T wastewater.
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