| 改进型分段进水厌氧/缺氧/好氧工艺强化营养物去除 |
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| 引用本文： | 王伟,王淑莹,彭永臻,张善锋,殷芳芳.改进型分段进水厌氧/缺氧/好氧工艺强化营养物去除[J].中国化学工程学报,2009,17(5):840-848. |
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| 作者姓名： | 王伟 王淑莹 彭永臻 张善锋 殷芳芳 |
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| 作者单位： | 1. Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Beijing University of Technology, Beijing 100124, China;2. Beijing Municipal Engineering Professional Design Institute Co. Ltd, Beijing 100037, China |
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| 基金项目： | Supported by the Project of Beijing Science and Technology Committee (D07050601500000);the National Key Science and Technology Special Projects (2008ZX07317-007-105) |
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| 摘 要： | In order to enhance phosphorus removal in traditional step-feed anoxic/oxic nitrogen removal process, a modified pilot-scale step-feed anaerobic/anoxic/oxic (SFA2/O) system was developed, which combined a reactor similar to UCT-type configuration and two-stage anoxic/oxic process. The simultaneous nitrogen and phosphorus removal capacities and the potential of denitrifying phosphorus removal, in particular, were investigated with four different feeding patterns using real municipal wastewater. The results showed that the feeding ratios (Q1) in the first stage determined the nutrient removal performance in the SFA2/O system. The average phosphorus removal efficiency increased from 19.17% to 96.25% as Q1 was gradually increased from run 1 to run 4, but the nitrogen removal efficiency exhibited a different tendency, which attained a maximum 73.61% in run 3 and then decreased to 59.62% in run 4. As a compromise between nitrogen and phosphorus removal, run 3 (Q1 0.45Qtotal) was identified as the optimal and stable case with the maximum anoxic phosphorus uptake rate of 1.58 mg•(g MLSS)－1•h－1. The results of batch tests showed that ratio of the anoxic phosphate uptake capacity to the aerobic phosphate uptake capacity increased from 11.96% to 36.85% with the optimal influent feeding ratio to the system in run 3, which demonstrated that the denitrifying polyP accumulating organisms could be accumulated and contributed more to the total phosphorus removal by optimizing the inflow ratio distribution. However, the nitrate recirculation to anoxic zone and influent feeding ratios should be carefully controlled for carbon source saving.
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| 关 键 词： | nutrients removal nitrogen phosphorus anaerobic/anoxic/oxic step-feed |
| 收稿时间： | 2008-12-23 |
| 修稿时间： | 2009-5-16
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Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process |
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| WANG Wei,WANG Shuying,PENG Yongzhen,ZHANG Shanfeng,YIN Fangfang.Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process[J].Chinese Journal of Chemical Engineering,2009,17(5):840-848. |
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| Authors: | WANG Wei WANG Shuying PENG Yongzhen ZHANG Shanfeng YIN Fangfang |
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| Affiliation: | 1. Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Beijing University of Technology, Beijing 100124, China;2. Beijing Municipal Engineering Professional Design Institute Co. Ltd, Beijing 100037, China |
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| Abstract: | In order to enhance phosphorus removal in traditional step-feed anoxic/oxic nitrogen removal process, a modified pilot-scale step-feed anaerobic/anoxic/oxic (SFA~2/O) system was developed, which combined a reactor similar to UCT-type configuration and two-stage anoxic/oxic process. The simultaneous nitrogen and phosphorus removal capacities and the potential of denitrifying phosphorus removal, in particular, were investigated with four different feeding patterns using real municipal wastewater. The results showed that the feeding ratios (Q_1) in the first stage determined the nutrient removal performance in the SFA~2/O system. The average phosphorus removal efficiency increased from 19.17% to 96.25% as Q_1 was gradually increased from run 1 to run 4, but the nitrogen removal efficiency exhibited a different tendency, which attained a maximum 73.61% in run 3 and then decreased to 59.62% in run 4. As a compromise between nitrogen and phosphorus removal, run 3 (Q_1 = 0.45Q_(total)) was identified as the optimal and stable case with the maximum anoxic phosphorus uptake rate of 1.58 mg(g MLSS)~(-1)·h~(-1). The results of batch tests showed that ratio of the anoxic phosphate uptake capacity to the aerobic phosphate uptake capacity increased from 11.96% to 36.85% with the optimal influent feeding ratio to the system in run 3, which demonstrated that the denitrifying polyP accumulating organisms could be accumulated and contributed more to the total phosphorus removal by optimizing the inflow ratio distribution. However, the nitrate recirculation to anoxic zone and influent feeding ratios should be carefully controlled for carbon source saving. |
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| Keywords: | nutrients removal nitrogen phosphorus anaerobic/anoxic/oxic step-feed |
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