Title Page
Contents
요약문 8
Abstract 10
1. Introduction 15
2. Experimental and methods 20
2.1. Laboratory-scale setup and operation 20
2.2. Chemical methods 25
2.3. Microbial analysis 26
3. Results and discussions 28
3.1. Change of TMP with time 28
3.2. Organic removal efficiency 30
3.3. Bulk characteristics in AFMBR 33
3.4. Microscopic observations of PVDF media 41
3.5. Methane production 46
3.6. Microbial analysis 49
4. Conclusions 54
5. References 55
Table 1. Operational conditions of anaerobic fluidized bed membrane bioreactor 24
Table 2. Comparison of AFMBR performance between PVDF media (this study) and PET beads 35
Fig. 1. Schematic of the anaerobic fluidized bed membrane bioreactor (AFMBR) 23
Fig. 2. TMP change with permeate flux during AFMBR operation 30
Fig. 3. SCOD removal efficiency of AFMBR during operation period 33
Fig. 4. Change in MLVSS concentration of AFMBR during operation period 35
Fig. 5. Bulk particle size analysis in AFMBR at 12h and 8h of HRT 37
Fig. 6. FTIR analysis results of PVDF media taken from AFMBR at 12h and 8h of HRT 39
Fig. 7. Total carbohydrate and protein concentrations of SMP and EPS in the bulk in the AFMBR reactor at 8h of HRT 41
Fig. 8. Comparison of SEM images of New (left) and Used (right) PVDF media 43
Fig. 9. Scanning electron micrographs and 3D surface plots of (a) (c) internal surface and (b) (d) external surface of clean PVPF media 45
Fig. 10. Change in methane yield of AFMBR in biogas generated from reactor during operation period 47
Fig. 11. Specific methane production test results for (1) synthetic greywater with bulk biomass and (2) with PVDF media taken from AFMBR 48
Fig. 12. Relative abundance of three genera related to IET in the bulk liquid and uncoated PVDF carrier samples from day 100 to day 300 50
Fig. 13. Relative abundances of methanogens in the bulk and uncoated PVDF carrier samples from day 100 to day 300 53