Establishment and stable operation of sulfide-driven denitrification-Anammox process treating wastewater with minimal nitrous oxide emissions.

Synergistic coupling of anammox and mixotrophic sulfide-driven denitrification for extensive nitrogen removal

Sulfide-driven partial denitrification serves as a remedial strategy for suboptimal partial nitrification-anammox performance.

The partial nitrification-anammox (PNA) process applied to low C/N municipal wastewater treatment is often constrained by unstable nitrite supply and nitrate accumulation. In this study, a coupled suboptimal partial nitrification, sulfide-driven partial denitrification, and anammox (sPN-SPDA) process was developed in a...

Balancing sulfur accumulation and nitrous oxide emissions during sulfide autotrophic denitrification in moving-bed biofilm reactor-based bioscrubbers.

Sulfide autotrophic denitrification (SADN) is a promising strategy for integrating biogas desulfurization with nitrogen removal in anaerobic digestion-based treatment systems. However, its application in moving bed biofilm reactors (MBBRs) remains limited by biosulfur (S0) accumulation and nitrous oxide (N2O) emissions...

Chlorite-Mediated Regulation of Nitrite Accumulation and Nitrogen Removal in Integrated Partial Denitrification/Anammox Biofilter.

Achieving stable and efficient nitrite accumulation in integrated partial denitrification/anammox (PD/A) processes is typically constrained by substrate competition among microorganisms, posing a significant challenge for large-scale engineering applications. This study proposes a novel strategy for regulating nitrogen...

Establishing endogenous partial denitrification coupled with anammox as a stable nitrogen removal pathway in an AOA system: Co-enrichment and synergistic interactions between GAOs and AnAOB.

The mainstream application of anammox in municipal wastewater treatment is constrained by unstable nitrite supply and poor retention of anammox bacteria (AnAOB). In this study, a continuous-flow anaerobic/oxic/anoxic (AOA) system treating real low-C/N municipal wastewater was operated for 265 d to establish endogenous...

Facilitation of partial nitrification in anaerobic digestion effluent through continuous supply of sulfide with oxygen limitation

Reactor schematic showing low dissolved oxygen and continuous sulfide supply suppressing nitrite-oxidizing bacteria activity and promoting partial nitrification. Appropriate treatment of nitrogen-containing wastewater is essential for protecting water resources and aquatic ecosystems. Although low-environmental-impa...