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DOI : ,    Vol.10, No.2, 7 ~ 14, 2002
Title
A Study on Enhancement of Nitrogen Removal Efficiency in Advanced Step Aeration Media System Using Cilium Media
강용태Yong Tae Kang,김태기Tae Gi Kim,조용현Yong Hyun Cho
Abstract
This study was investigated to complement nitrification in winter by using ASAM which put cilium media in a aerobic reactor and reaerobic reactor of ASA system which is already verified as advanced treatment process. Up to 90% of BOD, 86% of SS, 78% of T-N, 90% of NH_4^+-N were removed on average at a low temperature, which mean cilium media can maintain biomass with high concentration improving removal even short HRT as 6.28h. when Temperature was from 9.2℃ to 14.3℃, nitrification rate was from 0.469 to 1.306㎎NH_4^+-N/gMLVSS.hr. So equation of nitrification rate could express like K_n = 1.306·1.1922^(T-14.3) in the ASAM system and correlation coefficient(R^2) was 0.7515 in the ASAM system. Even though HRT of ASAM system was short than conventional advanced treatment process 1∼2h much, nitrification rate was improved as 1.039㎎NH_4-N/gMLVSS·hr in winter(at a 13℃) because of biomass with high concentration. Denirtification rate at a C/N value from 4.0 to 5.0, was from 0.8 to 1.4㎎NO_3-N/gMLVSS·hr, so the equation was revealed K_dn = 1.5074·L_n(C/N)-1.136.
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