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| Greenhouse gas emissions during the treatment of swine wastewater with high ammonia |
| Received:April 20, 2023 |
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| KeyWord:greenhouse gas emissions;livestock wastewater;wastewater treatment;methane;nitrous oxide;high ammonia loading rate |
| Author Name | Affiliation | E-mail | | YANG Yiming | State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China
University of Chinese Academy of Sciences, Beijing 100049, China
Laboratory of Water Pollution Control Technology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | WANG Enquan | State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China
University of Chinese Academy of Sciences, Beijing 100049, China
Laboratory of Water Pollution Control Technology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China | | | SUI Qianwen | State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China
Laboratory of Water Pollution Control Technology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China | qwsui@rcees.ac.cn | | CHEN Meixue | State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China
Laboratory of Water Pollution Control Technology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China | mxchen@rcees.ac.cn | | ZHENG Rui | Anping Hongjia Environmental Protection Technology Co., Ltd., Hengshui 053600, China | | | WEI Yuansong | State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China
University of Chinese Academy of Sciences, Beijing 100049, China
Laboratory of Water Pollution Control Technology, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing 100085, China | |
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| Abstract: |
| To explore the greenhouse gas emissions during livestock wastewater treatment processes under a high ammonia loading rate, this study sampled the anoxic/aerobic(A/O) process during the treatment of swine digestate at the pilot scale. We monitored the characteristics of GHG emissions and analyzed the influencing factors. The results indicated that the CH4 emission flux of the A/O process was 1 454.76 mg·m-2·h-1 and the emission factor was 0.85%. The largest source of CH4 emissions was the anoxic tank, accounting for 56.0% of the total emissions. The N2O emission flux was 101.25 mg·m-2·h-1 and the N2O emission factor was 0.64%. The largest source of N2O emissions was the aerobic tank, accounting for 87.1%. An accumulation of NO2--N contributes to N2O emissions but inhibits CH4 emissions. The denitrification reactions of nitrifying bacteria and denitrifying bacteria may be the main emission pathways of N2O during the treatment of swine wastewater. |
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