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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

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학술저널
저자정보
저널정보
한국축산학회(구 한국동물자원과학회) 한국축산학회지 한국축산학회지 제50권 제4호
발행연도
2008.1
수록면
561 - 572 (12page)

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Responses of real-time control parameters, such as ORP, DO and pH, to the conditions of biological animal wastewater treatment process were examined to evaluate the stability of real-time control using each parameter. Also an optimum index for supplemental carbon source addition based on NOx-N level was determined under a consideration of denitrification rate by endogenous respiration of microorganism and residual organic matter in liquor. Experiment was performed with lab-scale sequencing batch reactor(SBR) and working volume of the process was 45L. The distinctive nitrogen break point(NBP) on ORP-and DO-time profiles, which mean the termination of nitrification, started disappearing with the maintenance of low NH4-N loading rate. Also the NBP on ORP-and DO-time profiles was no longer observed when high NOx-N was loaded into the reactor, and the sensitivity of ORP became dull with the increase of NOx-N level. However, the distinctive NBP was constantly occurred on pH(mV)-time profile, maintaining unique profile patterns. This stable occurrence of NBP on pH(mV)-time profile was lasted even at very high NOx-N:NH4-N ratio(over 80:1) in reactor, and the specific point could be easily detected by tracking moving slope change(MSC) of the curve. Revelation of NBP on pH(mV)-time profile and recognition of the realtime control point using MSC were stable at a condition of over 300mg/L NOx-N level in reactor. The occurrence of distinctive NBP was persistent on pH(mV)-time profile even at a level of 10,000mg/L STOC(soluble total organic carbon) and the recognition of NBP was feasible by tracing MSC, but that point on ORP and DO-time profiles began to disappear with the increase of STOC level in reactor. The denitrfication rate by endogenous respiration and residual organic matter was about 0.4mg/L.hr., and it was found that 0.83 would be accepted as an index for supplemental carbon source addition when 0.1 of safety factor was applied.
#Nitrogen break point #NBP) #ORP #pH #mV)-time profile #Sequencing batch reactor #SBR)

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참고문헌 (12)

참고문헌 신청
Akin, B. S. / 2005 / Monitoring and control of biological nutrient removal in a sequencing batch reactor / Process Biochemistry 40 : 2873 ~ 2878 google schola Chen, K. C. / 2002 / Real-time control of an immobilized-cell reactor for wastewater treatment using ORP / Wat. Res. 36 : 230 ~ 238 google schola Kim, J. H. / 2004 / Integrated real-time control strategy for nitrogen removal in swine wastewater treatment using sequencing bstch reactors / Wat. Res. 38 : 3340 ~ 3348 google schola Kishida, N. / 2003 / Effectiveness of oxidation- reduction potential and pH as monitoring and control parameters for nitrogen removal in swine wastewater treatment by sequenc google schola Marsili, L. S. / 2006 / Control of SBR switching by fuzzy pattern recognition / Wat. Res. 40 : 1095 ~ 1107 google schola

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