外文翻译-- 在A2O工艺中污水组成对于脱氮除磷的影响以及控制

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1、中文 3700 字 ， 2100 英文单词， 10500 英文字符 文献 出处 ： Wang X, Peng Y, Wang S, et al. Influence of wastewater composition on nitrogen and phosphorus removal and process control in A2O process.J. Bioprocess & Biosystems Engineering, 2006, 28(6):397-404. Influence of wastewater composition on nitrogen and phosphor

2、us removal and process control in A2O process X Wang ， Y Peng ， S Wang ， J Fan ， X Cao Abstract A bench-scale anaerobicanoxicoxic (A2O) bioreactor with steady denitrifying phosphorus removal performance was tested to determine the influence of influent C/N ratio (SCOD/TN) and C/P ratio (SCOD/TP) on

3、biological nutrient removal for treating synthetic brewage wastewater; meanwhile, the spatial profiles of DO, pH and ORP sensors in such systems were investigated. The results showed that influent C/N ratio had significant effect on the TN, TP removal efficiencies and the ratio of anoxic to aerobic

4、P uptake amount. The maximal TN and TP removal efficiencies could be achieved when influent C/N ratio was kept at about 7.1 and 5, respectively. Besides, the ratio of anoxic to aerobic P uptake amount was found to be linearly dependent on the influent C/N ratio with coefficient R2 of 0.685 when tota

5、l recirculation ratio was constant at 3.5. Influent C/P ratio had an important effect on the TP removal efficiency, while it hardly affected TN removal efficiency. In addition, the TP removal efficiency reached the maximum for influent C/P ratio of 42. On the other hand, it was also found that the t

6、ypical profiles of DO, pH and ORP sensors could be observed, and they have similar trends at the different influent C/N ratio and C/P ratio. It was suggested that the operational state could be well known according to the changes of simple online Sensors. KEY WORDS: A2O process,C/N ratio ,C/P ratio,DO,PH,ORP Experimental procedures Synthetic brewery wastewater used in this study contained (per liter): brewage (ethanol content 3.5%) 2.83.4 mL; NH4Cl 0.200.3 g; KH2PO4 0.020.08