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Reduction of Nitrous Oxide Formation from a Biological Nutrient Removal System in Wastewater Treatment – Factors of Aeration, External Carbon and pH

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Significant amounts of nitrous oxide (N2O), a greenhouse gas, have been found emitted from some biological nutrient removal (BNR) processes, especially the simultaneous nitrification denitrification (SND) process. In this study, factors affecting N2O emissions including the aeration rate, the feeding pattern and pH were investigated in a simultaneous nitrification, denitrification and phosphorous removal (SNDPR) process using a hybrid sequencing batch reactor (SBR). The results suggest that using operating conditions of a lower aeration rate, continuous feeding and higher pH are strategies which could successfully reduce the emission of nitrous oxide.

Document Type: Research Article


Publication date: 2008-01-01

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