[논문]중수 재이용을 위한 오존 고도산화 및 세라믹 분리막 일체형 공정의 최적화 연구

이종훈; 노호정; 박광덕; 우윤철

doi:10.15681/kswe.2021.37.6.433

중수 재이용을 위한 오존 고도산화 및 세라믹 분리막 일체형 공정의 최적화 연구
Optimization of an Advanced Oxidation with Ozone and Ceramic Membrane Integrated Process for Greywater Reuse 원문보기

한국물환경학회지 = Journal of Korean Society on Water Environment, v.37 no.6, 2021년, pp.433 - 441

이종훈 (한국건설기술연구원 환경연구본부) , 노호정 (한국건설기술연구원 환경연구본부) , 박광덕 (한국건설기술연구원 환경연구본부) , 우윤철 (한국건설기술연구원 환경연구본부)

Abstract ▼ AI-Helper

The aim of this study was to optimize the ozonation and ceramic membrane integrated process for greywater reclamation. The integrated process is a repeated sequential process of filtration and backwash with the same ceramic membrane. Also, this study used ozone and oxygen gas for the backwashing process to compare backwashing efficiency. The study results revealed that the optimum filtration and backwash time for the process was 10 minutes each when comparing the filtrate flow and membrane recovery rate. The integrated process was operated at three different operating conditions with i) 10 minutes for filtration and 10 minutes for ozonation, ii) 10 minutes for filtration and 10 minute for oxygen aeration, and iii) continuous filtration without any aeration for synthetic greywater. The integrated process with ozone backwashing could produce 0.55 L/min of filtrate with an average of 18.42% permeability recovery, while the oxygen backwashing produced 0.47 L/min and 6.26%, respectively. And without any backwashing, the integrated process could produce 0.29 L/min. This shows that the ozone backwash process is capable of periodically recovering from membrane fouling. The resistance of the fouled membrane was approximately 34.4% for the process with ozone backwashing, whereas the resistance was restored by 10.8% for the process with oxygen backwashing. Despite the periodical ozone backwashing and chemical cleaning, irreversible fouling gradually increased approximately 3 to 4%. Approximately 97.6% and 15% turbidity and TOC were removed by ceramic membrane filtration, respectively. Therefore, the integrated process with ozonation and ceramic membrane filtration is a potential greywater treatment process.

주제어

표/그림 (11)

그림 Fig. 1. Flow diagrams of integrated ozone and ceramic membrane process on ceramic membrane.
그림 Fig. 2. Schematic diagram of integrated ozone and ceramic membrane process.
표 Table 1. Specification of a ceramic membrane
표 Table 2. Constitution of synthetic greywater
표 Table 3. The quality of synthetic and real greywater
그림 Fig. 3. A comparison of daily flow rate and each filtration/aeration time condition with synthetic greywater
그림 Fig. 4. Variation of permeability recovery according to ozonation time.
그림 Fig. 5. A comparison of the permeability during ozonation (white circle), aeration (white square), and continuous filtration (white triangle).
그림 Fig. 6. A comparison of filtration production of each operating condition.
그림 Fig. 7. The total resistance of each experimental condition.
그림 Fig. 8. Schematic diagrams of ozone and ceramic membrane integrated process of pilot scale.

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