Effect of liquid carbon sources on nitrate removal, characteristics of soluble microbial products and microbial community in denitrification biofilters

Nitrogen Removal from the Simulated Wastewater of Ionic Rare Earth Mining Using a Biological Aerated Filter: Influence of Medium and Carbon Source

“…However, compared with glucose and methanol, applying acetate as the feeding carbon lowered the bacterial diversity as supported by the smaller Shannon indices. This is attributed to the phase-out of other acetate-aspecific bacteria resulting from the flourishing of the denitrifying bacteria, which is in accordance with Jiang et al [45] who found that the highest total relative abundance of denitrifying bacteria in the denitrification biofilters fed with acetate was observed with respect to that with glucose or methanol. The β-diversity results (Figure 9) indicate that the oxygen concentration and soluble carbon type are the key factors significantly impacting the Bray-Curtis distance.…”

Exploring denitrification and anammox processes in the saturated zone of passively operated vegetated biofiltration systems

“…Numerous previous studies have confirmed that they could be involved in the denitrification process of biofiltration systems for nitrogen treatment. 53,60,61 Specifically, Comamonadaceae_unclassified were always among the top three most abundant genera in each individual medium, and its highest proportion was found in gravel (19.5%). The Comamonadaceae family has been found to have heterotrophic denitrification capability, 62 and was also previous observed in biofilter reactors for simultaneous partial nitrification, anammox and denitrification of wastewater treatment.…”

“…51,52 Proteobacteria and Bacteroidetes have been reported to contain denitrifying bacteria responsible for reducing nitrate in biofiltration systems. [52][53][54] Bacteroidetes are also able to degrade macromolecular organic metabolites into simple organic compounds, thus providing available carbon sources for denitrifying bacteria. 55 In particular, Planctomycetota, which contain species capable of the anammox process, have also been found at an average abundance level of 1.2%.…”

Application of biofilters developed under different influent characteristics in attenuating emerging contaminants from wastewater

“…Several studies highlighted the role of external carbon sources in enhancing the microbial diversity in biofilters. 17,18 Torresi et al found a positive correlation between external carbon sources and microbial community evenness while investigating the removal of ECs in two moving bed bioreactors (MBBR) fed with ethanol and methanol. 19 In the absence of both the external carbon source and inoculum, the development of microbial population was comparatively slow in the case of BAC1.…”