Carbon and nitrogen removal in a granular bed baffled reactor

Environmental Technology
M I BalochP J Collier

Abstract

The application of an anaerobic five compartment granular bed baffled reactor (GRABBR) was investigated with brewery wastewater for combined carbon and nitrate removal, with a separate downstream nitrification unit for converting ammonia to nitrate. The GRABBR was operated at an organic loading rate of 3.57 kg chemical oxygen demand (COD) m(-3) d(-1) and ammoniacal nitrogen (NH4-N) loading rate of 0.13 kg NH4-N m(-3) d(-1) when nitrified effluent from a downstream nitrification unit was recycled to the feed point of the GRABBR. Carbonaceous matter and nitrate were removed simultaneously in the GRABBR at different recycle to influent ratios (from 1 to 2), with nitrogen oxide (nitrate and nitrite nitrogen, NOx-N) loading rates varying from 0.04 to 0.05 kg NOx-N m(-3) d(-1). At all recycle to influent ratios, COD removal efficiency of 97% to 98% were observed in the GRABBR, and over 99% by the two-stage treatment configuration (i.e. GRABBR and nitrification unit). All the nitrates added to the GRABBR were denitrified in the first three compartments of the system. For all the recycle to influent ratios studied, almost all ammonia was converted to nitrate nitrogen with only small traces of nitrite nitrogen in the nitrification unit....Continue Reading

Citations

Mar 8, 2012·Applied Microbiology and Biotechnology·Masahiko Morita, Kengo Sasaki
Mar 25, 2015·Journal of Bioscience and Bioengineering·Zhixuan YinQi Zhou
Apr 19, 2016·Journal of Environmental Management·Carlos MendesLuciano Matos Queiroz
Jul 6, 2014·Journal of Bioscience and Bioengineering·Li XieQi Zhou
Apr 14, 2017·Environmental Technology·Jacobo Tabla-Hernandez, Edgar Lopez-Galvan
Jul 19, 2011·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Tien M LaiJin Hur

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