Effect of mixed liquor suspended solids (MLSS) on simultaneous nitrification and denitrification in a sequencing batch reactor

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Tian, Xi^1,2 ; Guo, Shangli^1,2 ; Xu, Kaicheng^1,2 ; Zhao, Chunling^1,2 ; Wang, Xuefeng^1,2 ; Bian, Dejun^1,2

School of Water Conservancy and Environment, Changchun Institute of Technology, Changchun

130012, China^1

Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun

130012, China^2

关键词: Batch tests;    Domestic wastewater;    High strength ammonias;    Mixed liquor suspended solids;    Removal efficiencies;    Sequencing batch reactors;    Simultaneous nitrification and denitrification;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/3/012041/pdf
DOI  :  10.1088/1755-1315/186/3/012041

来源: IOP

【 摘 要 】

This study investigated the effect of MLSS on simultaneous nitrification and denitrification in a sequencing batch reactor treating domestic wastewater. The average removal efficiencies of COD and TN increased from 93 and 68.21% to 97 and 74.20% with the increase in MLSS from 3.5-4.0 to 7.5-8.0 g/L, respectively. However, the average removal efficiency of TN decreased to 39.45% when MLSS increased to 9.5-10.0 g/L. Simultaneous nitrification and denitrification (SND) was carried out in high MLSS (7.5-8.0 and 9.5-10.0 g/L), and SND efficiencies were 43.4-52.0% and 72.1-80.7%, respectively. Batch tests suggested that there was a strong potential to apply high MLSS for treating wastewater containing high-strength ammonia nitrogen.