Effects of the C/N ratio and bacterial populations on nitrogen removal in the simultaneous anammox and heterotrophic denitrification process: Mathematic modeling and batch experiments

Possibilities of Leachate Co-Treatment Originating from Biogas Production in the Deammonification Process

“…The NH 4 -N removal efficiency in our study was about 100%. In the study of Bi et al (2015), this value was about 33% in an 8-hour cycle. Moreover, an increase in the NO 3 -N concentration can also be seen.…”

Evaluation of Partial Nitritation/Anammox (PN/A) Process Performance and Microorganisms Community Composition under Different C/N Ratio

“…This resulted in a reduction in N removal. It is also worth noting that the indicated tests and ours were carried out at a temperature of 20-35 • C, while De Clippeleir et al [34] obtained the best TN removal efficiency of 45% at a C/N ratio of 1, and increasing the C/N ratio no longer allowed an increase in yield at the tested temperature of 15 • C. A comparison of the obtained TN removal efficiency and NH 4 -N removal efficiency at different C/N ratios in other studies is shown in Table 4. The process was carried out in SBR using real wastewater.…”

“…Bi et al [34] also showed an increase in TN removal efficiency from 61% to 99.5% with an increase in the C/N ratio from 1 to 1.8 and a decrease in the efficiency to 74% with a ratio of 3.5. Our results are therefore confirmed in the literature, although a completely different impact of the C/N ratio on the PN/A process was also described [32].…”

“…In one study [34], the TN removal efficiency was improved after a sharp decrease in the C/N ratio of 2 by changing the feeding regime. Instead of two pulses of 10 min per hour, one 20 min period was introduced within one hour.…”

Assessing the impacts of native freshwater mussels on nitrogen cycling microbial communities using metagenomics

“…Environmental factors such as N, oxygen, and carbon (C), select for the N-cycling microbes with the most advantageous metabolic characteristics, in a process termed "niche partitioning" [37]. For example, biogeochemical conditions where carbon-nitrogen (C/N) ratios are less than two enables anammox bacteria to predominate (85% of microbiome) in anoxic conditions (dissolved oxygen less than 0.05 mg/L) and are more favorable than denitrification reactions [38]. Additionally, resistance to low oxygen concentrations creates vertical partitioning between the nitrifying organisms, aerobic ammonia oxidizing bacteria (AOB) and archaea (AOA).…”