Influence of wastewater composition on nitrogen and phosphorus removal and process control in A2O process

Bioprocess and Biosystems Engineering
Xiaolian WangXuemei Cao

Abstract

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. ...Continue Reading

References

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Citations

Feb 19, 2013·Environmental Science and Pollution Research International·Jiangping LiWei Wu
Feb 6, 2010·Journal of Hazardous Materials·Jianheng YuWeifeng Wang
Sep 5, 2008·Bioresource Technology·Hanmin ZhangJie Zhang
Apr 30, 2008·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·P FongsatitkulP Elefsiniotis
Oct 7, 2018·Bioprocess and Biosystems Engineering·Agnieszka TuszynskaJacek Makinia

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