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電混凝技術應用於微藻收集與濃縮 PowerPoint PPT Presentation


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電混凝技術應用於微藻收集與濃縮. 摘要. 電凝技術應用直流電將廢水中微粒之電性中和,以及應用犧牲電極解離金屬 離子之凝聚吸附作用,將廢水中微小顆粒凝聚後再經浮除、過濾或沉降程序從水 中分離,已應用於工業上如染整廢水、工業區污水廠等應用實績;電凝技術於飲 用水微藻去除之前處理作業,眾多研究單位亦進行長期之研究。本研究利用電混 凝來凝聚微藻細胞,促進其沈降功能。將高濃度微藻通過直流電電場,將微藻表 面電荷中和,同時應用鐵犧牲陽極,將微藻造成絮團( flock ),達到濃縮目的, 以探討電凝作用於高濃度微藻濃縮之可行性。經由實驗結果顯示,應用海水所培

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電混凝技術應用於微藻收集與濃縮

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4700743


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flock

1 V 450 C/g-algae

20 rpm 10 min90%

10 ppm500 mg/L

0.07 kWh/m3


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.


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12

330V 40A

E0=1.36VE0=1.23V5O2Cl2

3NaCl9V PH


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(Eq 1-2)

Fe(s)=>Fe2+ + 2e- E0=0.44 V Eq 1.

Fe2+ =>Fe3+ + e- E0=0.77 V Eq 2.

0.5V0.005A1V


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:

1.

(Nannochloropsis oculata)Size23mF/2 medium ()400-1000 mg/LpH8.4(Zeta potential)=- 0.215 mV

2.

NIKONECLIPSE 80I


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3.

MOTECH programmable DC power supply /110V/0.5A

4.

a.

200mL OD 200mL SS416cm*10cm*1mmt37.2cm22cm

30

50rpm1.0V

b.

c. 20rpm 10

PVA OD


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5.

5mm PVA 50m20mm 100m 685nm 343.5Xmg/LX OD

6.

NIEA W311.51B


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1.

9V

1 SS41 66.74 92.9SUS304 64.56 13.8SS41

SUS304 1.8V 1,630 mA 11 min1,078.8 96.7SS41 16

SS41 0.17 kWh/kg


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Faraday Law100 12 g 13.8 g/100 g

1


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2.

20mm 10mm

1.5V0.5V 0.005A

1


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3.

400 22-3m

SS41 558 /flock100m

709mg/L558 /92.3%

2 709mg/L 400


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3558 /92.3%

4.

1 V

490450


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3

5.

450-500 /

50m 90

22

1,310mg/L 400 /g 97.5


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2


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6.

1V 500 /650mg/L 2 1L30 NIEAW311.51B 810.6 mg/L19.5 mg/L

7.

450-500 /90500mg/L 500 /1m3 500 250,000 1V 250,000 C1 V/3,6001,000=0.07KW-Hr/m34 0.28


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450 90%0.07Kw-Hr/m3


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