Study on De-Nitrification of Improved Step-Feed Progress

Abstract:

Improved step-feed de-nitrification progress combined with biological fluidized bed was introduced in this study. The progress had good performance and capacity of de-nitrification and organic matter. The experiment result showed that the de-nitrification efficiency of the improved biological fluidized bed with step-feed process was higher than the fluidized bed A/O process under the same water quality and the operating conditions. When the influent proportion of each segment was equal, the system showed good nitrogen removal efficiency with the change of influent C/N ratio, HRT and sludge return ratio. The removal rate of TN reached up to 88.2%. It showed that the simultaneous nitrification and de-nitrification phenomenon happened in the aerobic zone. The nitrogen removal mechanism was also studied.

• Periodical: Applied Mechanics and Materials (Volume 703)
• Pages: 171-174
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.703.171
• Online since: December 2014
• Authors: Bing Wang, Yi Xiao*, Shou Hui Tong, Lan Fang, Da Hai You, Song Han, Yuan Bo Wang
• Keywords: Biological Fluidized Bed, Denitrification, Simultaneous Nitrification, Step-Feed

References

[1] Zhao W T, Huang X, Lee D J. Enhanced treatment of coke plant wastewater using an anaerobic–anoxic–oxic membrane bioreactor system [J]. Separation and Purification Technology, 2009, 66(2): 279-286.

DOI: 10.1016/j.seppur.2008.12.028

[2] Hanwen Liang, Min Gao, Junxin Liu, Yuansong Wei, Xuesong Guo. A novel integrated step-feed biofilm process for the treatment of decentralized domestic wastewater in rural areas of China [J]. Journal of Environmental Sciences, 2010, 22(3): 321-327.

DOI: 10.1016/s1001-0742(09)60111-x

[3] He S B, Xue G, Wang B Z. Factors affecting simultaneous nitrification and de-nitrification (SND) and its kinetics model in membrane bioreactor[J]. Journal of Hazardous Materials, 2009, 168(2-3): 704-710.

DOI: 10.1016/j.jhazmat.2009.02.099

[4] Yongzhi Chen, Chengyao Peng, Jianhua Wang, Liu Ye, Liangchang Zhang, Yongzhen Peng. Effect of nitrate recycling ratio on simultaneous biological nutrient removal in a novel anaerobic/anoxic/oxic (A2/O)-biological aerated filter (BAF) system [J]. Bioresource Technology, 2011, 102(10): 5722-5727.

DOI: 10.1016/j.biortech.2011.02.114

[5] Sheng-Peng Sun, Carles Pellicer i Nàcher, Brian Merkey, Qi Zhou, Si-Qing Xia, Dian-Hai Yang, Jian-Hui Sun, and Barth F. Smets. Environmental Engineering Science. February 2010, 27(2): 111-126.

DOI: 10.1089/ees.2009.0100

[6] S. Fatihah, T. Donnelly. Spatial distribution of ammonia-oxidizing bacteria in the biofilm and suspended growth biomass of the full- and partial-bed biological aerated filters [J]. Journal of Environmental Engineering and Science, 2013, 8(1): 413-421.

DOI: 10.1680/jees.2013.0041