Abstract
The ability of low frequency ultrasound for cleaning fouled membrane has been proved. In this investigation, various frequencies and mixed wave ultrasound were used separately and together with two concentrations of EDTA as chelating agent in forward flush cleaning of MF membranes which was fouled by milk solution 1%. A statistical multifactor design was employed to obtain more precise results. The main factors involving several frequencies of 28, 45, 100 kHz and mixed wave ultrasound as well as two concentrations of 1 mMole and 3 mMole of EDTA and their interaction effects were evaluated on flux recovery, cleaned membrane resistance and cleaning efficiency. The results showed that mixed wave ultrasound individually and together with EDTA 1 mMole had higher cleaning efficiency than other treatments and there is a synergistic effect when ultrasound was used with EDTA as a cleaning factor. Also polynomial regression of flux as a function of time showed that only 5 min forward flushing under irradiation of effective frequency of ultrasound and a low concentration of EDTA are enough to approach the cleaning of fouled MF membranes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.