Abstract Nitrate (NO 3−) pollution in water and wastewater has become a serious global
issue. Biological denitrification, which reduces NO 3− to N 2 (nitrogen gas) by denitrifying …

Autotrophic denitrification (AuDen) is an efficient, convenient and eco-friendly biological
process for the treatment of nitrate-contaminated organic-deficient waters. AuDen can be …

Biological denitrification is the most widely used method for nitrogen removal in water
treatment. Compared with heterotrophic and autotrophic denitrification, mixotrophic …

Iron sulphides, mainly in the form of mackinawite (FeS), pyrrhotite (Fe 1-x S, x= 0–0.125) and
pyrite (FeS 2), are the most abundant sulphide minerals and can be oxidized under anoxic …

Anoxic ammonium oxidation (anammox) is an energy-efficient nitrogen removal process for
wastewater treatment. However, the unstable nitrite supply and residual nitrate in the …

Elemental sulfur (S 0) is known to be an abundant, non-toxic material with a wide range of
redox states (-2 to+ 6) and may serve as an excellent electron carrier in wastewater …

The pollution of nitrate (NO 3-) in groundwater has become an environmental problem of
general concern and requires immediate remediation because of adverse human and …

Biological denitrification process in mainstream wastewater treatment often needs dosing
supplemental electrons, consequently adding a remarkable operating cost. Organic carbon …

Keystone bacteria associated with a thiosulfate-driven autotrophic denitrification microbial
community for treating high nitrate concentration wastewater were identified in this study …

Compared to autotrophic and heterotrophic denitrification process, the Integrated
autotrophic and heterotrophic denitrification (IAHD) has wider foreground of applications in …