[논문]단축질소제거 공정을 이용한 가축분뇨의 적정 처리조건 연구

강진영; 장영호; 정병환; 김연진; 김용호

doi:10.15681/kswe.2023.39.5.390

단축질소제거 공정을 이용한 가축분뇨의 적정 처리조건 연구
Optimal Operation Condition of Livestock Wastewater Treatment Using Shortcut Biological Nitrogen Removal Process 원문보기

한국물환경학회지 = Journal of Korean Society on Water Environment, v.39 no.5, 2023년, pp.390 - 395

강진영 (경기도보건환경연구원 물환경연구부) , 장영호 (경기도보건환경연구원 물환경연구부) , 정병환 (경기도보건환경연구원 물환경연구부) , 김연진 (경기도보건환경연구원 물환경연구부) , 김용호 (경기도보건환경연구원 물환경연구부)

Abstract ▼ AI-Helper

The feasibility of applying the shortcut nitrogen removal process to treat livestock wastewater on individual farms was examined, and appropriate operating parameters were established. As a result,, it was determined that the nitrification reaction was carried out under 550 mg/L of ammonium nitrogen concentration, but it was less effective under conditions of high ammonia concentration. Consequently, it was confirmed that a partial injection of inflow water was necessary to minimize the effects of ammonia toxicity. Following the sequential batch reactor (SBR) operation results, it was difficult to achieve the effluent quality standard without an external carbon source. Also, selection of the appropriate hydraulic retention time was critical for the optimal SBR operation. Following the livestock farm application, with external carbon source injecting, the total nitrogen concentration in the effluent was 85.1 mg/L. This result revealed that the standard could be accomplished through a single treatment on individual livestock farms. The ratio of nitrite nitrogen to ammonia nitrogen in the effluent was verified to be suitable for implementing the anammox process with a 10 days of hydraulic retention time. This study demonstrated the potential applicability of process in the future. However, in order to apply to livestock farms, managing variations in wastewater load across individual farms and addressing reduced nitrogen oxidation efficiency during the winter season are crucial.

주제어

표/그림 (8)

그림 Fig. 1. Amount of livestock wastewater and livestock head count in Korea.
그림 Fig. 2. Schedule of the operation stages in each cycle of sequencing batch reactor.
표 Table 1. Characteristics of livestock wastewater
그림 Fig. 3. Changes in nitrogen species concentration and pH with different initial ammonia concentrations under continuous aeration conditions.
그림 Fig. 4. Variation of nitrogen species accumulation and pH change by repeated livestock wastewater injection(a), Effects of nitrification bacteria by free ammonia and free nitrous acid concentrations(b); Zone 1: free ammonia inhibition to ammonia oxidizing bacteria and nitrite oxidizing bacteria, Zone 2: free ammonia inhibition to nitrite oxidizing bacteria, Zone 3: Complete nitrification, Zone 4: Free nitrous acid inhibition to nitrite oxidizing bacteria.
그림 Fig. 5. Estimation of the status of the nitrification bacteria, affected by free ammonia and free nitrous acid concentration during SBR operation.
그림 Fig. 6. Variation of the nitrogen species concentrations in full-scale SBR reactor to treat livestock wastewater.
표 Table 2. Results of SBR operation with different hydraulic retention times

참고문헌 (14)

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