| CH4 emission and conversion from A2O and SBR processes in full-scale wastewater treatment plants |
| |
| 作者姓名： | Yan Liu Xiang Cheng Xiaoxiu Lun Dezhi Sun |
| |
| 作者单位： | College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China |
| |
| 基金项目： | This work was supported by the Fundamental Research Funds for the Central Universities, China (No. TD2011-22), the ChinaWelfare Funds for Environmental Protection (No. 201009053), the Beijing Municipal Science and Technology Commission (No. Z111100058911003) and the National Natural Science Fundation of China (No. 51008023, 51078034, 51278051). |
| |
| 摘 要： | Wastewater treatment systems are important anthropogenic sources of CH4emission. A full-scale experiment was carried out to monitor the CH4 emission from anoxic/anaerobic/oxic process(A2O) and sequencing batch reactor(SBR) wastewater treatment plants(WWTPs) for one year from May 2011 to April 2012. The main emission unit of the A2O process was an oxic tank, accounting for 76.2% of CH4emissions; the main emission unit of the SBR process was the feeding and aeration phase, accounting for 99.5% of CH4emissions. CH4can be produced in the anaerobic condition, such as in the primary settling tank and anaerobic tank of the A2O process. While CH4can be consumed in anoxic denitrification or the aeration condition, such as in the anoxic tank and oxic tank of the A2O process and the feeding and aeration phase of the SBR process. The CH4emission flux and the dissolved CH4concentration rapidly decreased in the oxic tank of the A2O process. These metrics increased during the first half of the phase and then decreased during the latter half of the phase in the feeding and aeration phase of the SBR process. The CH4oxidation rate ranged from 32.47% to 89.52%(mean: 67.96%) in the A2O process and from 12.65% to 88.31%(mean: 47.62%) in the SBR process. The mean CH4 emission factors were 0.182 g/ton of wastewater and 24.75 g CH4 /(person·year) for the A2O process, and 0.457 g/ton of wastewater and 36.55 g CH4 /(person·year) for the SBR process.
|
| 关 键 词： | SBR工艺 CH4排放 污水处理厂 工艺转换 厌氧 好氧工艺 废水处理系统 甲烷排放量 A2O工艺 |
CH4 emission and conversion from A2O and SBR processes in full-scale wastewater treatment plants |
| |
| Yan Liu,Xiang Cheng,Xiaoxiu Lun,Dezhi Sun.CH4 emission and conversion from A2O and SBR processes in full-scale wastewater treatment plants[J].Journal of Environmental Sciences,2014,26(1):224-230. |
| |
| Authors: | Yan Liu Xiang Cheng Xiaoxiu Lun and Dezhi Sun |
| |
| Institution: | College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China |
| |
| Abstract: | Wastewater treatment systems are important anthropogenic sources of CH4 emission. A full-scale experiment was carried out to monitor the CH4 emission from anoxic/anaerobic/oxic process (A2O) and sequencing batch reactor (SBR) wastewater treatment plants (WWTPs) for one year from May 2011 to April 2012. The main emission unit of the A2O process was an oxic tank, accounting for 76.2% of CH4 emissions; the main emission unit of the SBR process was the feeding and aeration phase, accounting for 99.5% of CH4 emissions. CH4 can be produced in the anaerobic condition, such as in the primary settling tank and anaerobic tank of the A2O process. While CH4 can be consumed in anoxic denitrification or the aeration condition, such as in the anoxic tank and oxic tank of the A2O process and the feeding and aeration phase of the SBR process. The CH4 emission flux and the dissolved CH4 concentration rapidly decreased in the oxic tank of the A2O process. These metrics increased during the first half of the phase and then decreased during the latter half of the phase in the feeding and aeration phase of the SBR process. The CH4 oxidation rate ranged from 32.47% to 89.52% (mean: 67.96%) in the A2O process and from 12.65% to 88.31% (mean: 47.62%) in the SBR process. The mean CH4 emission factors were 0.182 g/ton of wastewater and 24.75 g CH4 /(person year) for the A2O process, and 0.457 g/ton of wastewater and 36.55 g CH4/(person year) for the SBR process. |
| |
| Keywords: | CH4 emission production and consumption wastewater treatment plant A2O SBR |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|
