Effect on Denitrification Efficiency in Alternating Process at Different C/N Ratio

Chun Di Gao; Wei Xiao Wang; Shi Xin Fan; Hao Li; Er Long Jiao

doi:10.4028/www.scientific.net/AMR.1030-1032.442

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1030-1032Effect on Denitrification Efficiency in...

Effect on Denitrification Efficiency in Alternating Process at Different C/N Ratio

Abstract:

Nitrification-denitrification biological nitrogen removal process has become the hotspot for the wastewater. During carbon/nitrogen (C/N) ratio was 1.16, 2.25, 4.07 and 6.20, the change of denitrification efficiency and the impact on the partial nitrification/denitrification was investigated. The results showed that removal rate of ammonia nitrogen was maintained in the high level, and was stable above 98% after C/N ratio higher than 1.16. With C/N ratio increased, the removal rate of chemical oxygen demand was increased about 20%, total nitrogen was increased from 54.9% to 84.6%. Simultaneously, after C/N ratio was higher than 4.07, the concentration of effluent TN was below 15 mg/L. Nitrite accumulation rate was maintained above 95%, the effect on partial nitrification was good, and the concentration of effluent nitrate was nearly 0, the best ratio of the C/N ratio was 4.07.

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Periodical:

Advanced Materials Research (Volumes 1030-1032)

Pages:

442-445

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1030-1032.442

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Online since:

September 2014

Authors:

Chun Di Gao*, Wei Xiao Wang, Shi Xin Fan, Hao Li, Er Long Jiao

Keywords:

Alternating Anoxic/Oxic, C/N Ratio, Partial Nitrification/Denitrification, Wastewater

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