The objectives of the experiment was to measure the emissions of N2O during aerobic treatment and also to evaluate the parameters that maintain stable operation for aerobic treatment with the minimum ammonia and nitrous oxide emissions. Raw manure should be added constantly to help in the nitrification denitrification process and lower emissions of N2O. Diluted manure to 1,5% DM(dry matter) seems to be more stable that for higher DM. The experiment was done in laboratory (reactor 6 L). Real scale experiments would be needed to confirm those results.