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Study on operation efficiency and carbon emission characteristics of A2/O + MBR process |
HU Yong-feng1, LIANG Mei2, ZHANG Yong-xiang1, WANG Kun3 |
1. Faculty of Urban Construction, Beijing University of Technology, Beijing 100124, China; 2. China ENFI Engineering Co., Ltd., Beijing 100038, China; 3. Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
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Abstract The operation effect and carbon emission characteristics of the A2/O+MBR process in the H reclaimed water plant of Tongzhou District, Beijing, were studied in this paper. The results showed that the average removal rates of BOD5, CODcr, NH4+-N, TN and TP were 97.3%, 94.1%, 98.6%, 77.0% and 96.2% respectively. The total carbon emission and carbon emission per ton of water of the H reclaimed water plant decreased gradually in spring and summer and increased slowly in autumn and winter, the total carbon emission per ton of water was about 2.26kgCO2e/t. In the total carbon emissions, energy consumption carbon emissions accounted for the leading position, while CH4, N2O carbon emissions, and drug consumption carbon emissions accounted for a relatively small proportion. The statistical analysis results showed that the carbon emissions of CH4 ton water, energy consumption ton water, and material consumption ton water were significantly correlated with BOD5, TN influent concentration, and BOD5 removal rate. The carbon emission of N2O per ton of water was significantly correlated with the influent concentrations of TN and BOD5. There is no significant correlation between direct and indirect carbon emissions per ton of water and water quantity.
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Received: 14 February 2021
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