The growth performance of duckweed and removal rate of nitrate and phosphorus in sewages with different processes
文献类型：会议论文
| 作者 | Zhang, Qing Tao1; Zhang, Zhi Jian1,2; Ma, Jiong1; Xiang, Jiao1 |
| 出版日期 | 1905-07-06 |
| 会议日期 | December 28, 2013 - December 29, 2013 |
| 会议地点 | Shenzhen, China |
| 关键词 | Lakes - Nitrates - Sewage treatment - Nitrogen removal - Sedimentation - Nitrogen |
| 卷号 | 522-524 |
| DOI | 10.4028/www.scientific.net/AMM.522-524.854 |
| 页码 | 854-860 |
| 英文摘要 | The growth performance of duckweed (Spirodela polyrrhiza) and its removal rate of nitrate and phosphorus in sewages taken from sewage treatment plant with different processes were studied. The experiments were conducted in an environmentally controlled growth chamber. Three kinds of sewages were taken from a grit chamber, a sedimentation tank, and the anoxic pond in a sewage treatment plant, respectively. The fourth kind of sewage was mixed using the sedimentation tank sewage and the anoxic pond sewage in a volumetric ratio 1:1. The weight of duckweed biomass were determined with a balance. Wastewater samples taken from the media were analyzed for total nitrogen (TN), ammonium nitrogen (NH4-N), total phosphorus (TP), phosphate-phosphorus (PO4-P) using AA3 Continous Flow Analyzer. The results showed that Spirodela polyrrhiza grew well in sewages taken from grit chamber and sedimentation tank of a sewage treatment plant, whereas a lot of duckweed fronds were dead in the sewage taken from the anoxic pond due to the high TP (higher than 7.9 mg/L) and TN (higher than 51.6 mg/L). The suitable TN concentration for Spirodela polyrrhiza growth should not be higher than 45 mg/L. Compared with the treatments without duckweed, the NH4-N concentrations were reduced more than 60% in ST and GC sewages with duckweed due to the NH4-N uptake by duckweed. Spirodela polyrrhiza could remove TN efficiently in sewages with relative low concentration TN (less than 20 mg/L), while duckweed could not remove TN effectively in sewages with high concentration TN (higher than 20 mg/L). The TN concentration in GC sewage decreased greatly in the first four days, which probably brought about anaerobic condition, thus P uptake switched to net release of P, which caused the increase of the TP concentration in the GC sewage without duckweed in the last six days. O2 or oxidant should be provided for sewage treatment system using duckweed to ensure that efficient removal of TN and TP meanwhile. The TP and PO4-P concentrations in the mixed sewage with duckweed increased far more than those for no-duckweed treatments, which could be related that the dead duckweed released P into the sewage. 漏 (2014) Trans Tech Publications, Switzerland. |
| 资助机构 | Trans Tech Publications |
| 会议录 | 2013 2nd International Conference on Sustainable Energy and Environmental Engineering, ICSEEE 2013
 |
| 学科主题 | Wastewater Treatment |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59373]  |
| 作者单位 | 1.Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China 2.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| 推荐引用方式 GB/T 7714 | Zhang, Qing Tao,Zhang, Zhi Jian,Ma, Jiong,et al. The growth performance of duckweed and removal rate of nitrate and phosphorus in sewages with different processes[C]. 见:. Shenzhen, China. December 28, 2013 - December 29, 2013. |
入库方式： OAI收割
来源：过程工程研究所
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