Ceramic membrane defouling (cleaning) by air Nano Bubbles

Aliasghar Ghadimkhani, Wen Zhang, Taha Marhaba

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Ceramic membranes are among the most promising technologies for membrane applications, owing to their excellent resistance to mechanical, chemical, and thermal stresses. However, membrane fouling is still an issue that hampers the applications at large scales. Air Nano Bubbles (NBs), due to high mass transfer efficiency, could potentially prevent fouling of ceramic membrane filtration processes. In this study, bench and pilot scale ceramic membrane filtration was performed with air NBs to resist fouling. To simulate fouling, humic acid, as an organic foulant, was applied to the membrane flat sheet surface. Complete membrane clogging was achieved in less than 6 h. Membrane defouling (cleaning) was performed by directly feeding of air NBs to the membrane cells. The surface of the ceramic membrane was superbly cleaned by air NBs, as revealed by atomic force microscope (AFM) images before and after the treatment. The permeate flux recovered to its initial level (e.g., 26.7 × 10-9 m3/m2/s at applied pressure of 275.8 kPa), which indicated that NBs successfully unclogged the pores of the membrane. The integrated ceramic membrane and air NBs system holds potential as an innovative sustainable technology.

Original languageEnglish (US)
Pages (from-to)379-384
Number of pages6
JournalChemosphere
Volume146
DOIs
StatePublished - Mar 1 2016

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Keywords

  • AFM
  • Air nano bubbles
  • Antifouling
  • Ceramic membranes
  • Defouling
  • Fouling

Fingerprint Dive into the research topics of 'Ceramic membrane defouling (cleaning) by air Nano Bubbles'. Together they form a unique fingerprint.

Cite this