It could never be found until recently, in a fish tank a few floors below a university microbiology department: one single organism able to perform the complete process of nitrification.

The authors have discovered that nitrite-oxidizing organisms can convert cyanate (an oxidation product of cyanide and a decomposition product of urea) into ammonium (the protonated form of ammonia) ...

On timescales of hundreds to thousands of years, the ocean is the Earth’s largest active reservoir of carbon and is the dominant sink for anthropogenic carbon dioxide 15. This is principally a result ...

Zhang Y.K. and Yang, H. (2026) Research on the Application of Nitrogen Removal Technology for Rural Sewage Based on Embedded ...