Characterization of microbial communities supporting methanogenesis in saline anaerobic digestion systems.
This study evaluated the potential of microbial consortia naturally adapted to saline environments to support methane (CH4) production during anaerobic digestion of saline wastewaters. Marine sediments, impacted or not by aquaculture, were tested as inocula and showed significantly higher acetate-based methane production rates than a non-halophilic wastewater sludge across salinities from 0 to 35 g NaCl L?¹. Although methane production remained stable with increasing salinity, microbial community composition shifted according to 16S rRNA gene metabarcoding analyses. Active communities included fermentative and syntrophic bacteria supporting methanogenesis, with Methanosarcina and Methanogenium as dominant methanogens. These results highlight the potential of marine sediments as inocula for anaerobic treatment of saline aquaculture wastewaters.
This study evaluated the potential of microbial consortia naturally adapted to saline environments to support methane (CH4) production during anaerobic digestion of saline wastewaters. Marine sediments, impacted or not by aquaculture, were tested as inocula and showed significantly higher acetate-based methane production rates than a non-halophilic wastewater sludge across salinities from 0 to 35 g NaCl L?¹. Although methane production remained stable with increasing salinity, microbial community composition shifted according to 16S rRNA gene metabarcoding analyses. Active communities included fermentative and syntrophic bacteria supporting methanogenesis, with Methanosarcina and Methanogenium as dominant methanogens. These results highlight the potential of marine sediments as inocula for anaerobic treatment of saline aquaculture wastewaters.
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