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18 - Table 3.3 Analytical methods Item Chemical Oxygen Demand Solids Flow rate Pressure Power Consumption Method Closed Reflux, Colorimetric Gravimetric Electrometric Electrometric Watt-hour meter
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20 - mg ΔSCOD/g TS 8 6 4 2 D15 D15-16 D15-16-19 D15-16-17-19 mg ΔSCOD/g TS 0 6 4 2 0 5 10 15 20 Number of pre-treatment times D15 D15-16 D15-16-19 D15-16-17-19 0 0 0.5 1 1.5 2 Energy Consumption (KWh) Figure 3.2 Effects of the number of venturi in the system.
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22 - mg ΔSCOD/g TS 15 10 5 Suction 15-17-19 Discharge 15-17-19 mg ΔSCOD/g TS 15 10 5 Suction 15-17-19 Discharge 15-17-19 y = 3.7746x y = 2.3792x 0 0 10 20 30 40 50 Number of pre-treatment times 0 0 1 2 3 4 5 6 7 Energy Consumption (KWh) 1.5 1.5 1 0.5 1 0.5 Total head loss 0 0-0.5 Total head loss -0.5-1 -1.5 VENTURI 1 INL E T THRO AT VENTURI 2 I NL ET T HROA T VENTURI 3 I NL ET THROA T OUTL ET -1-1.5 VENTURI 1 T HRO AT VENTURI 2 I NL ET T HROA T V ENTURI 3 I NL ET THROA T OUTLE T ; (a) and (b) treatment efficiency, (c) and (d) pressure changes.
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24 - mg ΔSCOD/g TS 20 15 10 5 D13-15-17 D15-16-19 (a) D13-15-19 D15-17-19 mg ΔSCOD/g TS 20 15 10 5 D13-15-17 D15-16-19 (b) D13-15-19 D15-17-19 0 0 5 10 15 20 25 30 Number of pre-treatment times 0 0.0 1.0 2.0 3.0 4.0 5.0 Energy Consumption (KWh) (c) Pressure (atm) -0.3-0.6-0.9-1.2-1.5 D13-15-17 D15-16-19 2 1 D13-15-19 D15-17-19 Figure 3.4. Treatment efficiencies and pressure changes for the system with different combinations of venturi diameter.
25 - mg ΔSCOD/g TS 15 10 5 Discharge D15-17-19 40Hz Discharge D15-17-19 50Hz Discharge D15-17-19 60Hz 0 0 10 20 30 40 50 Number of pre-treatment times mg ΔSCOD/g TS 15 10 5 D15-17-19 40Hz D15-17-19 50Hz D15-17-19 60Hz 0 0 1 2 3 4 5 6 7 Energy Consumption (KWh)
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27 - mg ΔSCOD/g TS 20 15 10 5 Series D15-16-19 parallel D15-16-19 0 0 10 20 30 40 Number of pre-treatment times mg ΔSCOD/g TS 20 15 10 5 Series D15-16-19 parallel D15-16-19 y = 5.5533x y = 4.2386x 0 0 1 2 3 4 5 6 Energy Consumption (KWh) 6 mg ΔSCOD/g TS- kwh 5 4 3 2 1 0 VCS Kang et al. Kampas Reference
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35 - Methane Production (ml/da Methane Contents (%) 1400 1200 1000 800 600 400 200 0 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 0.0% (a) 15 12 10 SRT(days) (b) 15 12 10 SRT(days) Figure 4.2 Methane production at various pre-treatment times and SRTs ; a) methane production and b) methane omposition.
36-6000 (a) 5000 4000 3000 2000 1000 0 15 12 10 SRT(days) (b) 40% 30% 20% 10% 0% 15 12 10 SRT(days) Figure 4.3 COD removal at various pre-treatment times and SRTs ; a) COD removal rate and b) COD removal efficiency.
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38 - (a) 6000 5000 4000 3000 2000 1000 0 15 12 10 SRT(days) (b) 40% 30% 20% 10% 0% 15 12 10 SRT(days)
39-0.3 R0 R10 R20 R30 0.25 0.2 0.15 0.1 0.05 0 15 12 10 SRT(days)
40-5 00 4 50 4 00 3 50 S RT 15days S RT 12days S RT 10days theoretical CH4 prod. 선형 (SRT 10 days) y = 1.3 5 x y = 1.17 x 3 00 y = 1.48 x 2 50 2 00 1 50 1 00 50 0 0 10 0 20 0 30 0 40 0 SCOD increase(mg/d) Pr Pr 메탄발생증가량 메탄발열량 환산계수 전력소모량 운전시간 회분식전처리회당슬러지량
41 - Number SRT Reactor of (day) No. Treatment ΔCH 4 prodduction (L/L sludge) Power consumption (W) Sludge volume for 1 batch (L) E P (Wh/L) E C (Wh/L) E B (Wh/L) R2 10 0.24 2,000 650 2.41 2.46-0.05 15 R3 20 0.50 2,000 650 5.00 4.92 0.07 R4 30 0.75 2,000 650 7.48 7.38 0.10 R2 10 0.25 2,000 650 2.51 2.46 0.05 12 R3 20 0.52 2,000 650 5.13 4.92 0.21 R4 30 0.75 2,000 650 7.50 7.38 0.12 R2 10 0.25 2,000 650 2.49 2.46 0.03 10 R3 20 0.50 2,000 650 4.97 4.93 0.04 R4 30 0.75 2,000 650 7.47 7.38 0.09
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