Engin GÜRTEKİN

Effect of Intermittent Aeration and Step-Feed on Nitrogen Removal Performance in Anoxic-aerobic Sequencing Batch Reactor

In this study, it was investigated the effect intermittent aeration and step-feed on nitrogen removal by providing anoxic-aerobic, anoxic-aerobic-anoxic-aerobic and step-feed anoxic-aerobic-anoxicaerobic working conditions. Chemical oxygen demand (COD) removal efficiency was the same in all three working conditions and was found to be 91%. The NH4 + -N removal efficiency is almost the same. The NH4 + -N removal efficiencies in the W1, W2 and W3 are 92%, 93% and 95%, respectively. Total inorganic nitrogen (TIN) removal efficiency increased by 4% when intermittent aeration was applied. Increasing the efficiency of TIN removal by 24% was achieved by applying the step-feed intermittent aeration. Experimental results show that the effect of intermittent aeration on TIN removal was limited and that TIN removal performance with step-feed intermittent aeration was significantly increased.

Keywords:

Sequencing batch reactor, nitrogen removal, intermittent aeration step-feed,

PDF

___

APHA, AWWA, WCPF. (1998). Standard Methods for the Examination of Water and Wastewater, 20th Edition, American Public Health Association, Washington, D.C.
Barker, P. S., & Dold, P. L. (1995). COD and nitrogen mass balances in activated sludge systems. Water Research, 29(2), 633-643.
Chen, F. Y., Liu, Y. Q., Tay, J. H., & Ning, P. (2011). Operational strategies for nitrogen removal in granular sequencing batch reactor. Journal of Hazardous Materials, 189(1-2), 342-348.
Chen, F. Y., Liu, Y. Q., Tay, J. H., & Ning, P. (2013). Alternating anoxic/oxic condition combined with step-feeding mode for nitrogen removal in granular sequencing batch reactors (GSBRs). Separation and Purification Technology, 105, 63-68.
de la Vega, P. M., Jaramillo, M. A., & de Salazar, E. M. (2013). Upgrading the biological nutrient removal process in decentralized WWTPs based on the intelligent control of alternating aeration cycles. Chemical Engineering Journal, 232, 213-220.
Ge, S., Peng, Y., Wang, S., Guo, J., Ma, B., Zhang, L., & Cao, X. (2010). Enhanced nutrient removal in a modified step feed process treating municipal wastewater with different inflow distribution ratios and nutrient ratios. Bioresource Technology, 101(23), 9012-9019.
Henze, M. (1991). Capabilities of biological nitrogen removal processes from wastewater. Water Science and Technology, 23(4-6), 669-679.
Kim, D., Kim, K. Y., Ryu, H. D., Min, K. K., & Lee, S. I. (2009). Long term operation of pilot-scale biological nutrient removal process in treating municipal wastewater. Bioresource Technology, 100(13), 3180-3184.
Liang, H., Gao, M., Liu, J., Wei, Y., & Guo, X. (2010). A novel integrated step-feed biofilm process for the treatment of decentralized domestic wastewater in rural areas of China. Journal of Environmental Sciences, 22(3), 321-327.
Lim, J. W., Lim, P. E., & Seng, C. E. (2012). Enhancement of nitrogen removal in moving bed sequencing batch reactor with intermittent aeration during REACT period. Chemical Engineering Journal, 197, 199-203.
Pan, M., Chen, T., Hu, Z., & Zhan, X. (2013). Assessment of nitrogen and phosphorus removal in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR). Water Science and Technology, 68(2), 400-405.
Patel, A., Zhu, J., & Nakhla, G. (2006). Simultaneous carbon, nitrogen and phosphorous removal from municipal wastewater in a circulating fluidized bed bioreactor. Chemosphere, 65(7), 1103-1112.
Singh, N. K., Bhatia, A., & Kazmi, A. A. (2017). Effect of intermittent aeration strategies on treatment performance and microbial community of an IFAS reactor treating municipal waste water. Environmental technology, 38(22), 2866-2876.
Sun, Y., Wang, H., Wu, G., & Guan, Y. (2018). Nitrogen removal and nitrous oxide emission from a step-feeding multiple anoxic and aerobic process. Environmental Technology, 39(7), 814-823.
Sun, Y., Xin, L., Wu, G., & Guan, Y. (2019). Nitrogen removal, nitrous oxide emission and microbial community in sequencing batch and continuous-flow intermittent aeration processes. Environmental Engineering Research, 24(1), 107-116.
Vaiopoulou, E., & Aivasidis, A. (2008). A modified UCT method for biological nutrient removal: configuration and performance. Chemosphere, 72(7), 1062-1068.
Xing, L., Ou, L., Zhang, Y., Zheng, D., & Wu, G. (2017). Nitrogen Removal and N2O Emission During Low Carbon Wastewater Treatment Using the Multiple A/O Process. Water, Air & Soil Pollution, 228(9), 367.
Yang, Q., Peng, Y., Liu, X., Zeng, W., Mino, T., & Satoh, H. (2007). Nitrogen removal via nitrite from municipal wastewater at low temperatures using real-time control to optimize nitrifying communities. Environmental Science and Technology, 41, 8159–8164.
Zeng, W., Li, L., Yang, Y., Wang, S., & Peng, Y. (2010). Nitritation and denitritation of domestic wastewater using a continuous anaerobic–anoxic–aerobic (A2O) process at ambient temperatures. Bioresource Technology, 101(21), 8074-8082.
Zhong, C., Wang, Y., Wang, Y., Lv, J., Li, Y., & Zhu, J. (2013). High-rate nitrogen removal and its behavior of granular sequence batch reactor under step-feed operational strategy. Bioresource Technology, 134, 101-106.