Related Experiment Video
Updated: Jun 5, 2026

Biogas Purification through the use of a Microalgae-Bacterial System in Semi-Industrial High Rate Algal Ponds
Published on: March 22, 2024
Nitrogen removal via nitrite pathway and the related nitrous oxide emission during piggery wastewater treatment
Rajinikanth Rajagopal1, Fabrice Béline
1Cemagref, UR GERE, 17, Avenue de Cucillé, CS 64427, F-35044 Rennes, France.
Abstract:
Performance of partial nitrification (PN) via nitrite (NO(2)(-)) pathway and the related nitrous oxide (N(2)O) emission during piggery wastewater treatment was investigated. Dissolved oxygen (DO) concentration and aeration pattern were selected as operational parameters to investigate the possibility of NO(2)(-) accumulation without affecting the overall N removal. To obtain PN, aeration was done for a maximum of 3h with a stopover of oxygenation, whenever DO concentration exceeds the threshold value of 2 mg O(2)L(-1). Ammonium (NH(4)(+)) consumption ended within 2h of reaction, and at the end of NH(4)(+) oxidation, about 70-80% of N was accumulated as NO(2)(-). Using PN, an average N removal of 74-75% was observed, which is comparable to that of complete nitrification-denitrification process. Regulating the aeration pattern not only benefit to the N removal in piggery wastewater, but also favoured reduction of oxygen and organic matter requirements for nitrification and denitrification. N(2)O emission was not encouraged even with 70-80% of NO(2)(-) accumulation.
More Related Videos
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
06:52Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure
Published on: July 19, 2018
Related Concept Videos
Overview of Nitrogen Metabolism
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this nitrogen...
Microbes and the Nitrogen Cycle
Microbial Wastewater Treatment
Inorganic Nitrogen Assimilation
The Nitrogen Cycle
Biological Treatment of Effluent and Waste Water