Published: Jan. 1, 2023

Ferrous iron (Fe2+) reduces the amount of external carbon source used for denitrification low C/N wastewater. The effects key operating parameters on efficiency Ferrous-dependent autotrophic (FDAD) and mechanism functioning by microbiome can provide a regulation strategy improving In this study, response surface method (RSM) was to explore influence four important parameters, i.e., Fe/N, total organic (TOC), sludge volume (SV, %) FDAD. Functional prediction molecular ecological network based high-throughput sequencing technique were changes in structure, function biomarkers microbial community. results showed that Fe/N TOC are main affecting Higher concentrations high provided more electron donors improved but weakened importance (Rhodanobacter, Thermomonas, Comamonas, Thauera, Geothrix unclassified genus family Gallionellaceae) network. When > 4, fluctuated greatly. functional indicated genes dominated N2O NO reduction Fe2+ transport slight decrease abundance at levels. light these findings, we recommend optimization ranges are: (3.5~4); TOC/N (0.36~0.42); SV (approximately 35%).

Language: Английский