Nitrous emission from a SBR wastewater treatment system under different NH4+ concentration

• Main Authors: Zhe Piao, Lei Jing, Yu-min Li, Shuai Ma, De-ying Chen, Cheng-da He, Shi-xue Yin
• Format: Conference Proceeding
• Language: chi ; eng
• Subjects: Communities; DNA; Meteorology; microbial community; N 2 O emission; Nitrogen; Nitrogen transformation; Production; SBR system; Soil; Wastewater
• DOI: 10.1109/RSETE.2011.5965237

Nitrous emission in SBR denitrification process and the microbial community impact on it were studied. Result showed that the relationship between the N 2 O emission and conversion efficiency of nitrogen in system during the wastewater nitrogen removal process is negatively correlated. Under the experimental conditions, with NH 4 + concentration increased, the efficiency of nitrogen transformation is decreased in this SBR system, meantime the N 2 O-N ratio is rapidly increase. Using PCR-DGGE technique analysis characteristics of microbial communities in SBR system under the different concentrations of NH 4 + Showed that in high NH 4 + concentration (60 mg · L -1 )the microbial community is quite different when compared to medium (40 mg ·L -1 )and low (20 mg ·L -1 )concentrations. N 2 O emission in high NH 4 + concentration was effected by the nitrogen conversion efficiency and the changes in microbial community. In this study, the proportion of N 2 O-N is 0.25%~6.35% in the wastewater nitrogen removal process under different NH 4 + concentrations.