Advanced nitrogen and phosphorus removal in the pre-denitrification anaerobic/anoxic/aerobic nitrification sequence batch reactor (pre-A 2 NSBR) treating low carbon/nitrogen (C/N) wastewater

Simultaneous nitrogen and phosphorus removal by combined anammox and denitrifying phosphorus removal process

“…and Zhao et al . (Table ) . Due to discharging sludge regularly during the whole operation period, the biomass concentration (MLSS) for the DPAO process was maintained at around 4500 mg L −1 .…”

“…and Oehmen et al ., the glycogen degradation per VFA uptake and PHA synthesis per VFA uptake were 0.3–0.5 mmol‐C mmol −1 ‐C and 0.97–1.35 mmol‐C mmol −1 ‐C for acetate and propionate as carbon source (Table ) . However, the values were somewhat higher than expected for a GAOs‐enriched state, consistent with GAOs exhibiting higher glycogen hydrolysis and PHA synthesis in the anaerobic phase than DPAOs . As shown in Table , the glycogen degradation and PHA synthesis per VFA uptake were 0.35 mmol‐C mmol −1 ‐C and 1.05 mmol‐C mmol −1 ‐C at phase III, respectively.…”

“…The ratio of P release to VFA uptake was 0.19 mmol-P mmol −1 -C at phase III, which was in the range 0.07-0.5 mmol-P mmol −1 -C reported by Wang et al and Zhao et al (Table 3). 12,22 Due to discharging sludge regularly during the whole operation period, the biomass concentration (MLSS) for the DPAO process was maintained at around 4500 mg L −1 . Thus, it could be concluded that the ability of P release for DPAOs was improved by the carbon source changing from phase I to phase III rather than the biomass concentration effect.…”

Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1)

“…By calculating the organic matter and nitrogen values, the mole C/N ratio was lower than that of traditional membrane aerated biofilm reactor (MABR) (about C/N = 2.11) and that of novel sludge system (about C/N = 1.70) . Besides, the ratio was similar to the complicated sequential batch reactor (SBR) system (about 0.84–1.27), the EAM‐MFC system (about 0.79–1.22) and sponge addition‐MFC system (about 1.11) . Furthermore, considering the effect of external resistance on the nitrogen removal, a further decrease of the C/N ratio would be possible at lower resistance.…”

Efficiency of SBR Process with a Six Sequence Aerobic-Anaerobic Cycle for Phosphorus and Organic Material Removal from Municipal Wastewater

“…Sequencing batch reactor (SBR) as modified version of activated sludge is one of the most successful methods in nutrient removal [7][8][9][10]. SBR systems have replaced other conventional systems in the biological treatment of industrial and sanitary wastewater due to their numerous advantages.…”