Title: 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.
Publication Year: 2014
Publication Date: 2014-09-01
Language: en
Type: article
Indexed In: ['crossref']
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