Effect of the Ratio of COD_Cr to Total Nitrogen on Enhanced Treatment of Sewage from Discharging Points of Rivers by Enzyme-Biofilm Process

Abstract:

The research studied enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme and promotion effect of enzyme on treatment of sewage by biofilm process, and investigated the effect of the ratio of CODCr to total nitrogen (C/N) on removals of pollution indexes. The research results indicated that with the decrease of C/N, the removal rates of COD_Cr were stable and the removal rates of NH₃-N increased, but the removal rates of TN obviously decreased in the three reactors. When C/N=5, the average removal rate of TN was higher than 30% in reactor B and C. When C/N=3, it decreased and maintained about 30%. When C/N=2, it was low and approximately 20%. When C/N=5, 3 or 2，the removal rates of COD_Cr, NH₃-N and TN greatly increased in reactor B and C than in reactor A, which indicated that the promotion effects of the composite enzyme and the compounded enzyme on the removals of the target pollutants were favorable.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 3751-3754
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.3751
• Online since: May 2011
• Authors: Gai Mei Guo
• Keywords: Ammonia Nitrogen, COD_Cr, Enzyme, Ratio of COD_Cr to Total Nitrogen, Total Nitrogen

References

[1] J.J. Cairns: Environ. Profess. Vol. 13 (1991), p.1186

[2] B.E. Rittmann and P.L. Mccarty: MeGraw-Hill Com Inc. Vol. 5 (2001), p.695

[3] B.N. Aronstein and M. Alexander: Appl. Microbiol Biotechnol. Vol. 39 (1998), p.386

[4] A. Field, F.J. Gervantes and F.P. Vander Zee: Water Sci. Technol. Vol. 42 (2000), p.215

[5] D.R. Lovley, J.C. Woodward and F.H. Chapelle: Appl. Environ. Microbiol. Vol. 62 (1996), p.288

[6] M.A. Aly: Water Res. Vol. 32(1998), p.944

[7] Y. Hyungseok: Water Res. Vol. 33 (1999), p.145

[8] S.H. Lee and J. Kim: Bioresource Technol. Vol. 99 (2007), p.2578