Wang Xiaolian, Peng Yongzhen, Wang Shuying, Fan Jie, Cao Xuemei
Key Laboratory of Beijing for Water Environment Recovery, Beijing University of Technology, Pingleyuan 100, Chaoyang District, 100022, Beijing, People's Republic of China.
Bioprocess Biosyst Eng. 2006 May;28(6):397-404. doi: 10.1007/s00449-006-0044-5. Epub 2006 Mar 1.
A bench-scale anaerobic-anoxic-oxic (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 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 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 total 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 typical 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 on-line sensors.
对一个具有稳定反硝化除磷性能的实验室规模厌氧-缺氧-好氧（A2O）生物反应器进行了测试，以确定进水碳氮比（SCOD/TN）和碳磷比（SCOD/TP）对处理合成酿造废水生物脱氮除磷的影响；同时，研究了此类系统中溶解氧（DO）、pH值和氧化还原电位（ORP）传感器的空间分布。结果表明，进水碳氮比对总氮（TN）、总磷（TP）去除效率以及缺氧与好氧吸磷量之比有显著影响。当进水碳氮比分别保持在约7.1和5时，可实现最大的TN和TP去除效率。此外，当总回流比恒定为3.5时，发现缺氧与好氧吸磷量之比与进水碳氮比呈线性相关，相关系数R2为0.685。进水碳磷比对TP去除效率有重要影响，而对TN去除效率影响不大。此外，进水碳磷比为42时，TP去除效率达到最大值。另一方面，还发现可以观察到DO、pH值和ORP传感器的典型分布，并且在不同的进水碳氮比和碳磷比下它们具有相似的趋势。建议根据简单在线传感器的变化可以很好地了解运行状态。
