XUYan-chao,WANGYa-jun,WANGJin-xi.Carbon Emission Accounting of Bioretention Cell under Tetracycline Stress Based on Minitab Multiple Regression Analysis[J].China Water & Wastewater,2023,39(15):34-44.
Carbon Emission Accounting of Bioretention Cell under Tetracycline Stress Based on Minitab Multiple Regression Analysis
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第15期
Page:
34-44
Column:
Date of publication:
2023-08-01
- Keywords:
- carbon emission accounting; bioretention cell; sewage treatment; tetracycline; multiple regression
- Abstract:
- In order to explore the plant which can minimize the carbon footprint of bioretention cell (BRC) under tetracycline stress, a total of 8 bioretention cell filled with the same packing were constructed to treat tetracycline wastewater for a period of 147 days. The mechanism of greenhouse gas production during the operation of bioretention cell was preliminarily expounded, and the carbon footprint model of bioretention cell was constructed. On this basis, the emissions of CH4 and N2O in the process of wastewater treatment with different concentrations of tetracycline were estimated by means of IPCC emission factor method.Taking the carbon emission under different tetracycline concentration stress operation duration as the dependent variable and tetracycline concentration, COD removal rate and TN removal rate as the independent variable, multiple regression analysis was conducted using Minitab. Then the regression model was established. The reliability of the model was verified by supplementary experiments. According to the analysis, when the tetracycline concentration was at a high level (1.2-1.8 mg/L), the BRC treatment efficiency of planting Acorus calamus was the best: the COD removal rate could reach more than 89%, the TN removal rate could reach more than 60%, and the lowest carbon emission (in CO2 equivalent) was about 0.123 9 kg, followed by Phalaris arundinacea. When the tetracycline concentration was at a low level (0-0.6 mg/L), the BRC treatment efficiency of planting Phalaris arundinacea was the best: COD removal rate could reach above 89%, TN removal rate could reach above 66%, and the lowest carbon emission was about 0.105 4 kg, followed by Acorus calamus.Therefore, in order to ensure the quality of BRC effluent and minimize carbon emissions, it is recommended to palnt Acorus calamus under the stress of higher concentration of tetracycline, and Phalaris arundinacea under the stress of lower concentration of tetracycline.
Last Update:
2023-08-01