Promising evolution of biofuel generations. Subject review

A critical review of one-stage anammox processes for treating industrial wastewater: Optimization strategies based on key functional microorganisms.

Anaerobic ammonium oxidation (anammox) has attracted extensive attention as a potentially sustainable and economical municipal wastewater treatment process. However, its large-scale application is limited by unstable nitrite (NO2--N) production and associated excessive nitrate (NO3--N) residue. Thus, our study sought to evaluate an efficient alternative to the current nitritation-based anammox process substituting NO2--N supply by partial-denitrification (PD; NO3--N → NO2--N) under mainstream conditions. Ammonia (NH4+-N) was partly oxidized to NO3--N and removed via a PD coupled anammox (PD/A) process by mixing the nitrifying effluents with raw wastewater (NH4+-N of 57.87 mg L-1, COD of 176.02 mg L-1). Excellent effluent quality was obtained with< 5 mg L-1 of total nitrogen (TN) despite frequent temperature fluctuations (25.7-16.3 °C). The genus Thauera (responsible for PD) was the dominant denitrifiers (36.4%-37.4%) and coexisted with Candidatus Brocadia (anammox bacteria; 0.33%-0.46%). The efficient PD/A allowed up to 50% reduction in aeration energy consumption, 80% decrease in organic resource demand, and lower nitrous oxide (N2O) production compared to conventional nitrification/denitrification process. Our study demonstrates that coupling anammox with flexible NO2--N supply has great potential as a stable and efficient mainstream wastewater treatment.

Flexible Nitrite Supply Alternative for Mainstream Anammox: Advances in Enhancing Process Stability.

Insight into the impacts of organics on anammox and their potential linking to system performance of sewage partial nitrification-anammox (PN/A): A critical review.

Towards mainstream deammonification of municipal wastewater: Partial nitrification-anammox versus partial denitrification-anammox.

Partial nitrification-anammox (PNA) treating sewage with intermittent aeration mode: Effect of influent C/N ratios

Enhanced nitrogen and phosphorus removal from municipal wastewater in an anaerobic-aerobic-anoxic sequencing batch reactor with sludge fermentation products as carbon source.

Mechanism of stable sewage nitrogen removal in a partial nitrification-anammox biofilm system at low temperatures: Microbial community and EPS analysis.

Achieving partial nitrification in a continuous post-denitrification reactor treating low C/N sewage

Advanced nitrogen removal from municipal wastewater via two-stage partial nitrification-simultaneous anammox and denitrification (PN-SAD) process.

Lei Wu

Papers

Partial nitrification-anammox (PNA) treating sewage with intermittent aeration mode: Effect of influent C/N ratios

Enhanced nitrogen and phosphorus removal from municipal wastewater in an anaerobic-aerobic-anoxic sequencing batch reactor with sludge fermentation products as carbon source.

Mechanism of stable sewage nitrogen removal in a partial nitrification-anammox biofilm system at low temperatures: Microbial community and EPS analysis.

Achieving partial nitrification in a continuous post-denitrification reactor treating low C/N sewage

Advanced nitrogen removal from municipal wastewater via two-stage partial nitrification-simultaneous anammox and denitrification (PN-SAD) process.