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1 实验部分
1.1 实验装置
Fig. 1 Schematic diagram for A2/O-MBBR reactor

1.2 污泥特性
Table 1 Influent and effluent characteristics of A2/O-MBBR system
项目 | COD/(mg·L−1) | NH4+-N/(mg·L−1) | NO3−-N/(mg·L−1) | NO2−-N/(mg·L−1) | TN/(mg·L−1) | PO43−-P/(mg·L−1) | pH |
进水 | 224.8 | 66.8 | 0.15 | 0.04 | 69.1 | 5.7 | 7.2 |
出水 | 30.6 | 0.7 | 11.3 | 1.2 | 13.5 | 0.2 | 6.9 |
1.3 批次实验安排
1.4 常规项目监测方法
1.5 动力学参数计算
释磷量: QPRA = PAn-t2 − PAn-t1
| (1) |
比释磷速率: RPRR = (PAn-t2 − PAn-t1)/(CVSS-An·ΔTAn)
| (2) |
比耗碳速率: RCUR = (CAn-t1 − CAn-t2)/( CVSS-An·ΔTAn)
| (3) |
反硝化脱氮量: QDNA = NA-t1 − NA-t2
| (4) |
吸磷量: QPUA = PA-t1 − PA-t2
| (5) |
比反硝化速率: RDNR = (NA-t1 − NA-t2)/( CVSS-A·ΔTA)
| (6) |
比吸磷速率: RPUR = (PA-t1 − PA-t2)/( CVSS-A·ΔTA)
| (7) |
2 结果与讨论
2.1 实验条件的选择和确定
2.1.1 碳源投加量及厌氧反应时间
Fig. 2 Phosphorus release of different COD concentrations

2.1.2 缺氧反应时间
Table 2 Denitrifying phosphorus removal characteristics under different anoxic reaction times
缺氧反应时间/min | DNR/(mg·(g·h)−1) | PUR/(mg·(g·h)−1) | PO43−-P去除率/% | NO3−-N去除率/% | (NO3−-N/PO43−-P)/(mg·mg−1) |
60 | 3.49 | 5.65 | 65.04 | 69.44 | 0.62 |
120 | 5.82 | 7.45 | 99.23 | 99.58 | 0.78 |
180 | 4.80 | 6.71 | 92.05 | 99.80 | 0.71 |
240 | 4.22 | 6.12 | 90.17 | 99.87 | 0.69 |
300 | 3.41 | 5.03 | 80.04 | 99.32 | 0.68 |
2.2 厌氧释磷及碳源的转化利用
Fig. 3 Carbon transformation and phosphorus release during anaerobic stage

2.3 缺氧反硝化除磷特性
2.3.1 不同NO3−-N浓度下的脱氮除磷特性
Fig. 4 Influences of NO3−-N concentration on nitrogen and phosphorus removals

2.3.2 不同NO3−-N浓度下的内碳源转化利用特性
Fig. 5 Influences of NO3−-N concentration on PHAs and GLY transformation and utilization
Fig. 5 Influences of NO3−-N concentration on PHAs and GLY transformation and utilization

2.4 反硝化除磷的动力学分析
Table 3 Denitrifying phosphorus removal dynamic parameters under different operation conditions
运行工况 | NO3−-N质量浓度/(mg·L−1) | QPRA/(mg·L−1) | PRR/(mg·(g·h)−1) | CUR/(mg·(g·h)−1) | QDNA/(mg·L−1) | QPUA/(mg·L−1) | (NO3−-N/PO43−-P)/(mg·mg−1) | DNR/(mg·(g·h)−1) | PUR/(mg·(g·h)−1) |
厌氧阶段 | — | 40.88 | 15.14,3.00 | 36.91 | — | — | — | — | — |
厌氧阶段 I | 10 | — | — | — | 10.00 | 16.58 | 0.42 | 1.81 | 4.32 |
厌氧阶段 II | 20 | — | — | — | 20.00 | 25.74 | 0.51 | 2.79 | 5.44 |
厌氧阶段 III | 30 | — | — | — | 28.91 | 40.94 | 0.75 | 6.08 | 8.16 |
厌氧阶段 IV | 40 | — | — | — | 34.91 | 40.88 | 0.70 | 5.72 | 8.18 |
厌氧阶段 V | 50 | — | — | — | 26.62 | 36.83 | 0.59 | 4.32 | 7.37 |