KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

Kinetics of Nitrification and Denitrification in Hybrid Activated Sludge Process

HASP 공정의 동역학적 질산화와 탈질산화 효율 연구

Yoon, Young-Han;Park, Jae-Roh;An, Sang-Woo;Gee, Jae-Sung
윤영한;박재로;안상우;지재성

  • Published : 20070700

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Abstract

Hybrid Activated Sludge Process (HASP) was developed and applied to an activated sludge process for advanced nutrient treatment. The characteristics of nitrogen removal from the HASP was investigated through a kinetic study by batch-type experiment. On-line DB analysis was conducted for the nutrient removal performance in the field demonstration plant treating 10,000 m3 sewage per day in P city. This paper aimed to determine the effect of increasing NH4+-N load on the specific nitrification rate (SNR) and specific denitrification rate (SDNR) through the batch-type experiment and to estimate the net reaction time for the phase-transfer rate by the on-line DB analysis from the HASP manual mode operation. Experimental results include; (1) Both the nitrification and denitrification followed first-order kinetics. (2) The maximum SNR and SDNR were 4.0308 mgN/gVSS?hr and 2.7852 mgN/gVSS?hr, respectively. (3) Comparison the phase-transfer rates between nitrification and denitrification from the on-line DB analysis found that nitrification rate was higher than denitrification. It was concluded that increase in denitrification rate can enhance overall nitrogen removal rate in the HASP operation.

Keywords

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