E-ISSN: 2278–179X JECET; June – August-2013; Vol.2.No.3, 597-609. Journal of Environmental Science, Computer Science and Engineering & Technology An International Peer Review E-3 Journal of Sciences and Technology Available online at www.jecet.org Environmental Science Research Article JECET; June – August 2013; Vol.2.No.3, 597-609. 597 Efficiency Evaluation of FBBR for Denitrification using Fly Ash S. P. Burghate 1 *and N. W. Ingole 2 1* Department of Civil Engineering, Government Polytechnic, Amravati, INDIA 2 Department of Civil Engineering, Prof. Ram Meghe Institute of Technology and Research, Badnera, Amravati, INDIA Received: 18 June 2013; Revised: 10 July 2013; Accepted: 16 July 2013 Abstract: Nitrate has become one of the major environmental issues because of its implications on human and animal health. Therefore, for welfare of humankind it is necessary to remove nitrate from water resources. Biological denitrification is the most versatile option amongst the other methods for removal of nitrate. The FBBR (Fluidized Bed Biofilm Reactor) is one of the recent methods, which can be used for denitrification. The present study was carried out to evaluate the efficiency of FBBR for denitrification using fly ash as a biofilm carrier media. The maximum average nitrate nitrogen removal efficiency observed was 95.98% at HRT of 30 minutes and optimum as 90.17% at HRT of 10 minutes. For nitrogen loading rates varying from 0.48 kg N m -3 d -1 to 28.80 kg N m - 3 d -1 , the denitrification rates observed were varying from 0.45 kg N m -3 d -1 to 17.84 kg N m -3 d -1 . The optimum nitrate nitrogen loading rate and denitrification rate observed were 10.08 kg N m -3 d -1 and 9.09 kg N m -3 d -1 respectively. This indicates that the FBBR is quite efficient for removal of nitrate. Keywords: Anoxic; Denitrification; Fluidized Bed Biofilm Reactor (FBBR); Methanol; Nitrate.