Ferric Oxyhydroxide as Fouling Prevention Reagent for Low-Pressure Membranes
Marta Litynska 1  
,  
Roman Antoniuk 1  
,  
 
 
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Faculty of Chemical Technology, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremohy pr., Kyiv, 03056, Ukraine
CORRESPONDING AUTHOR
Marta Litynska   

Faculty of Chemical Technology, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37 Peremohy pr., 03056 Kyiv, Ukraine
Publish date: 2019-03-01
 
J. Ecol. Eng. 2019; 20(3):77–84
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ABSTRACT
Membrane technologies are very popular both in drinking water and wastewater treatment due to their significant advantages. However, colloidal fouling is one of the main disadvantages of low-pressure membranes. Fine particle ferric oxyhydroxide effectively protected membrane and adsorb humates, phosphates, arsenates, etc. Dividing of adsorption and microfiltration into two stages was the recommended regime. Mixing with adsorbent was the first one and separation on the membrane was the second stage. The adsorbent with immobilized impurities formed protective layer on the membrane surface. The non-adsorbed organic matter was left on this thickness. During backwash, water flow removed the adsorbent with immobilized pollutants. Afterwards, membrane was as clean as before filtration.