KARAKTERISTIK BIOLISTRIK PADA MEMBRAN ALAMI DAN MEMBRAN BUATAN
TEKNOLOGI MEMBRAN
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Transcript of TEKNOLOGI MEMBRAN
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TEKNOLOGI MEMBRANDR. IR. SUBRIYER NASIR, MS
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Membran : Suatu pemisahan antarfasa yang mengontrol secara selektif transport material antara fasa tersebut (Strathmann).
Membran dibutuhkan dalam :• Pemisahan material padatan halus yang compresible, terdispersi dalam cairan dan mempunyai densitas yang berdekatan dengan fasa liquid, mempunyai viskositas tinggi atau bersifat gelatinous• Pemisahan zat-zat yang mempunyai berat molekul rendah, non volatile organic atau zat-zat “pharmaceutical” dan garam-garam terlarut.• Pemisahan material-material biologi yang sangat sensitif terhadap lingkungan fisik dan kimianya.
Pemisahan suatu produk yang sulit dan mahal bila ditinjau secara ekonomi, berkembang pesat dalam industri bioteknologi dan food technology.
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Proses Filtrasi dengan Membran
1. Cross Flow
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2. Dead-end filtrattion
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Fouling causes Ways of treatment
Suspended solid and
particles
Gravity or pressure filters, cartridge filter MF
membranes.
Colloids Filtering through sand filters after coagulation/
flocculation process (gravitation and pressure
filters) UF membrane.
Scaling Acid addition, anti scaling addition, water
softening, temperature change.
Metal oxidation Cleaning with acid, usage of non-corrosive
materials
Biological Fouling Disinfection, filtering (dechlorination is needed
after chlorine disinfection), UV pretreatment.
Organics Fouling Coagulation and filtering, adsorption by activated
carbon, oxidation, MF and UF membranes.
Fouling
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Jenis Membran
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Cake Formation
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Concentration Polarization
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Filtrasi Konvensional
Rc = Tahanan CakeV= Total volume filtratΔP = Pressure drops antara cake dan media filter (Pa)