Treatment of Wastewater with Different Ratios of Carbon to Nitrogen Using an Enhanced Nitrogen Removal System of Constructed Wetland

Abstract:

An enhanced nitrogen removal system of constructed wetland has been established, and for which kind of nitrogen containing wastewater was suitable to be treated by such enhanced system was also investigated. The results show that when co-controlled by intermittent aeration and carbon source addition, dissolved oxygen concentration and process carbon-nitrogen ratio in enhanced system were improved, meanwhile TN removal capability was enhanced. For wastewater that contains low concentration of carbon and nitrogen, or low concentration of carbon but high concentration of nitrogen, or high concentration of carbon and nitrogen, or high concentration of carbon and low concentration of nitrogen, the average removal efficiency of COD, TN, NH₄⁺-N, NO₃^--N and TP in enhanced system were 68.1%, 78.2%, 70.8%, 86.7% and 71.2%, of which the purification capability was significantly better than that of the control system. The enhanced system is especially suitable for treatment of wastewater that contains low concentration of carbon and high nitrogen.

• Periodical: Advanced Materials Research (Volumes 864-867)
• Pages: 1287-1292
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.864-867.1287
• Online since: December 2013
• Authors: Min Tao, Qi Shuo Wang*, Ji Guang Li, Juan Juan Qu, Ya Qun Zhan, Wei Qin Li, Ying Bo Luo
• Keywords: Carbon Source Addition, Constructed Wetland, Intermittent Aeration, Nitrogen Removal

References

[1] J. Nivala, M.B. Hoos, C. Cross. Science of Total Environment Vol. 380 (2007), pp.19-27.

[2] M. Scholz, Å. Hedmark. Water Air Soil Pollution Vol. 205 (2010), pp.323-332.

[3] T. Zhang, D. Xu, F. He. Ecological Engineering Vol. 47 (2012), pp.189-197.

[4] R.H. Kadlec, S.D. Wallace: Treatment wetlands (2nd ed. ) (CRC Press, New York 2008).

[5] S.C. Reed, D. Brown. Water Environmental Research Vol. 67 (1995), pp.244-248.

[6] C.C. Tanner, R.H. Kadlec. Water Science Technology Vol. 48 (2003), pp.191-198.

[7] J.Y. Zhang, S.L. Xia, K. Xiong. Environmental Science Vol. 19 (1998), pp.36-39. (in Chinese).

[8] M.Y. Wu, E.H. Franz, S. Chen. Water Environmental Research Vol. 73 (2001), pp.661-666.

[9] J.L. Richardson, M.J. Vepraskas: Wetland soils: genesis, hydrology, landscapes and classification (CRC Press, Florida 2001).

[10] M. Green, E. Friedler, I. Safrai. Water Research Vol. 32(1998), pp.3513-3520.

[11] C. Ouellet-Plamondon, F. Chazarenc, Y. Comeau. Ecological Engineering Vol. 27 (2006), pp.258-264.

DOI: 10.1016/j.ecoleng.2006.03.006

[12] M. Tao, F. He, D. Xu. Polish Journal of Environmental Studies Vol. 19, (2010), pp.181-189.

[13] D.C. Garcia-Montiel, J.M. Melillo. Biology Fertile Soils Vol. 38 (2003), pp.267-72.

[14] L.H. She, F. He, D. Xu. Environmental Science Vol. 30 (2009), pp.3300-330. (in Chinese).

[15] China State Environmental Protection Administration: Monitoring and Determination Methods for Water and Wastewater (4th ed. ) (China Environmental Science Press, Beijing 2002).

[16] T.S. Jamieson, G.W. Stratton, R. Gordon. Canadian Biosystems Engineering Vol. 45 (2003), pp.109-114.

[17] R.H. Kadlec, H. Robert. Water Science Technology Vol. 40 (1999), pp.37-44.

[18] X.Y. Lian, X.L. Li, X.F. Xie. Electric Power Environmental Protection Vol. 2 (2008), pp.27-29. (in Chinese).

[19] L.F. Zhao, W. Zhu, J. Zhao. Acta Scientiae Circumstantiae Vol. 26 (2006), pp.1821-1827. (in Chinese).