FLOTASI.

Presentasi berjudul: "FLOTASI."— Transcript presentasi:

1 FLOTASI

2 Pengertian DAF Proses pengolahan air limbah atau air lainnnya dengan cara memisahkan endapan seperti minyak atau solid Pemisahan tercapai oleh udara yang terlarut di dalam air di bawah tekanan, lalu udara dilepaskan pada tekanan atmosferik didalam tangki pengapungan

3 Alasan Menghemat tempat Biaya operasi lebih murah
Dapat menghemat investasi dana 25-30% Tidak begitu terpengaruh terhadap iklim Waktu yang diperlukan relatif singkat

4 Benefits of DAF

5 Benefits of DAF Small footprint Short star-tup time
Minimal mechanical equipment No submerged moving parts Algae floats better than settles Sed. Basin: 75-1 gpm/ft /ft2 DAF: 4-6 gpm/ft /ft2

6 Rule of Thumb

7 How DAF Works

8 How DAF Works Air under pressure is dissolved into water according to Henry’s Law of Dissolution. Releasing the pressure back to standard temperature and pressure via a special device creates millions of “microbubbles” approximately 30 to 100 microns in diameter. At an 8 percent recycle flow at 70 psig saturation pressure, the number of 40-micron-diameter bubbles created at 40°F is 681 million per gallon. At 68°F the number of bubbles per gallon is 530 million

9 How DAF Works

10 SKEMATIK PROSES DAF

11 Faktor yang mempengaruhi DAF
Sifat Partikel Ukuran Partikel Dispersing Agents Komposisi dan sifat Influent Arus Cairan Rasio A/S Float Removal

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13 TUJUAN PEMISAHAN

14 Air to Solids Ratio

15 System DAF yang ada Full Flow Pressurization
Partial flow Pressurization without effluent recycle Recycle Flow Pressurization

16 Operational Modes

17 Gas to Solid Ratio of Recycle Flow Pressurization
Gin= QRCr + QCf Gout= Q(1+R) Ce Asumsi Cf = Ce Maka G = Gin – Gout G/S = Rce (FP-1)/X G/S = Rce (f)(P-1)/X

18 Jika Air to Solid ratio maka:
A/S = 1/3 a R (FP-1)/X A/S = 1/3 a R (f)(P-1)/X R= Qr/ Q Maka : A/S = 1/3 a Qr / Q (FP-1)/X A/S = 1/3 a Qr / Q (f) (P-1)/X

19 SKEMATIK PROSES DAF

20 SKEMATIK PROSES DAF

21 SKEMATIK PROSES DAF

22 SKEMATIK PROSES DAF

23 SKEMATIK PROSES DAF

24 SKEMATIK PROSES DAF

25 SKEMATIK AIR-HANDLING DAF PUMP

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27 Prinsip Kerja DAF

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30 Contoh modern unit DAF

31 Buble Generating Nozzle

32 Terima Kasih