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| Abstract: |
| The optimal operating condition for the total nitrogen (TN) removal in an anoxic/oxic-membrane reactor (A/O-MBR) was studied by employing response surface methodology (RSM), which is a statistical test method for optimizing stochastic processes. The individual and interactive influences of three operating parameters including dissolved oxygen in aerobic tank (DO), internal mixed liquor recycle rate (IR), and mixed liquor suspended solids (MLSS) on the TN removal efficiency were evaluated. TN removal efficiency increased first and then reduced with the increase of DO, IR, and MLSS. Results from RSM indicated that the three factors had significant interactive influences on the TN removal efficiency. Meanwhile, the interaction between DO and MLSS had more significant effects on the TN removal efficiency than those of the other two. The maximum TN removal efficiency was forecasted at 83.34% according to the model when MLSS was 7926.6 mg/L, IR was 371.8%, and DO was 3.5 mg/L. Under this optimum condition, the experimental TN removal efficiency was 83.13%, which further confirmed that the optimum strategy was reliable. |
| Key words: A/O-MBR TN removal efficiency optimization RSM operating condition |
| DOI：10.11916/j.issn.1005-9113.18143 |
| Clc Number:X703 |
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| Descriptions in Chinese: |
| 应用响应曲面法优化A/O-MBR中总氮去除 于明，田禹 （哈尔滨工业大学 环境学院，哈尔滨 150001） 摘要：本研究采用响应曲面法（RSM）优化了缺氧/好氧-膜生物反应器（A/O-MBR）中总氮（TN）去除条件，分析了缺氧池中溶解氧浓度（DO）、混合液回流比（IR）和污泥浓度（MLSS）等三个运行条件对TN去除率的影响。结果表明：随着DO、IR、MLSS增加，TN去除率先升高后降低，DO、IR、MLSS三个运行条件对TN去除率有显著影响，且DO和MLSS之间相互作用对TN去除率的影响要高于DO和IR、IR和MLSS之间相互作用。RSM优化的TN去除最优条件：MLSS为7926.6mg/L、IR为371.8%、DO为3.5mg/L时，TN去除率为83.34%。在该优化条件下，TN实际去除率为83.13%，进一步表明采用RSM法优化TN去除率是可信的。 关键词：缺氧/好氧-膜生物反应器（A/O-MBR），TN 去除率，优化，响应曲面法(RSM),运行条件 |
