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FLOTASI

FLOTASI. 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.

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FLOTASI

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  1. FLOTASI

  2. Pengertian DAF Prosespengolahan air limbahatau air lainnnyadengancaramemisahkanendapansepertiminyakatau solid • Pemisahantercapaiolehudara yang terlarutdidalam air dibawahtekanan, laluudaradilepaskanpadatekananatmosferikdidalamtangkipengapungan

  3. Alasan • Menghemattempat • Biayaoperasilebihmurah • Dapatmenghematinvestasidana 25-30% • Tidakbegituterpengaruhterhadapiklim • Waktu yang diperlukanrelatifsingkat

  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 SifatPartikel UkuranPartikel Dispersing Agents Komposisidansifat Influent ArusCairan Rasio A/S Float Removal

  12. TUJUAN PEMISAHAN

  13. Air to Solids Ratio

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

  15. Operational Modes

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

  17. 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

  18. SKEMATIK PROSES DAF

  19. SKEMATIK PROSES DAF

  20. SKEMATIK PROSES DAF

  21. SKEMATIK PROSES DAF

  22. SKEMATIK PROSES DAF

  23. SKEMATIK PROSES DAF

  24. SKEMATIK AIR-HANDLING DAF PUMP

  25. Prinsip Kerja DAF

  26. Contoh modern unit DAF

  27. Buble Generating Nozzle

  28. Terima Kasih

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