Effect of nitrate-N on the degradation of petroleum refinery wastewater in anoxic moving bed reactors

  • Subrat Kumar Mallick Department of Civil Engineering, Indian Institute of Technology Guwahati, Assam
  • Saswati Chakraborty Department of Civil Engineering, Indian Institute of Technology Guwahati, Assam, India
Keywords: Nitrate-N;, Anoxic;, Petroleum refinery;, Hydrocarbons;, SulfideS.

Abstract

Degradations of phenol, sulfide and total hydrocarbons (TH) were analyzed with variation in the influent nitrate-N load in anoxic moving bed reactors. Increase in the degradation rates of phenol, sulfide, TH and COD were observed with increase in nitrate-N. Increase in nitrate-N enhanced the conversion of sulfide to sulfate and formation (%) of elemental sulfur decreased.  Increase in the attached biomass and decrease in the suspended biomass was observed. Partial degradation of nitrate-N to nitrite-N was supported at higher nitrate-N loadings.  Kinetics of pollutants removal revealed that degradation rate of phenol, sulfide and TH increased as nitrate-N increased.

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Published
2017-12-31
How to Cite
Mallick, S., & Chakraborty, S. (2017). Effect of nitrate-N on the degradation of petroleum refinery wastewater in anoxic moving bed reactors. CSVTU International Journal of Biotechnology, Bioinformatics and Biomedical, 2(3), 33-38. https://doi.org/https://doi.org/10.30732/ijbbb.20170203001
Section
Articles