Pembersihan secara kimia atas PVDF membran yang dikotori oleh larutan gliserin (15 peratus berat gliserin dan 0.01 g/l asid oleik) telah dikaji. Eksperiment telah dijalankan untuk menganalisa kesan keadaan pembersihan terhadap kecekapan pembersihan yang dilakukan seperti jenis agen pembersih, masa pembersihan, dan kepekatan agen pembersih. Fluks pemulihan selepas pembersihan telah ditentukan untuk menyelidik kecekapan pembersihan. Selain itu, kaedah pencirian membran seperti pengukuran sudut kenalan dan IR transformasi Fourier (FTIR) telah digunakan untuk mengukuhkan lagi keputusan. NaOH telah dijumpai sebagai agen pembersih yang paling berkesan untuk membersih membran yang dikotori oleh larutan gliserin dengan 42.05% fluks pemulihan telah dicapai berbanding dengan agen pembersih yang lain dengan hanya kurang daripada 10.00% fluks pemulihan telah dicapai. Keputusan juga menunjukkan kecekapan larutan NaOH dalam pembersihan meningkat dengan masa. Di samping itu, apabila kepekatan larutan NaOH menambah, kecekapan larutan NaOH dalam pembersihan turut meningkat. Penambahan yang signifikan atas fluks pemulihan diperhatikan apabila kepekatan larutan NaOH digunakan dalam pembersihan secara kimia telah dinaikkan daripada 0.050% ke 0.100%. Fluks pemulihan sebanyak 74.08% telah dicapai bagi pengunaan 0.100% larutan NaOH dalam proses pembersihan.
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Chemical cleaning on PVDF membrane which fouled by glycerin-rich solution (15 wt% glycerin and 0.01 g/l oleic acid) was studied. Experiments were conducted to analyze the influence of various cleaning conditions on cleaning efficiency such as types of cleaning agents, cleaning time and concentration of cleaning agent. Flux recovery was determined after membrane cleaning to investigate the cleaning efficiency. Furthermore, membrane characterization methods like contact angle measurement and Fourier transform infrared (FTIR) spectroscopy were utilized to justify the results. NaOH was found to be the best cleaning agent used to clean the membrane fouled by glycerin-rich solution with 42.05% flux recovery achieved if compared to other cleaning agents with only less than 10.00% flux recovery achieved. Results also indicated the cleaning efficiency of NaOH solution increase with cleaning time. In addition, when concentration of NaOH solution was increased, the cleaning efficiency of NaOH solution increased as well. A significant increase in flux recovery was observed when concentration of NaOH solution used in chemical cleaning was increased from 0.050% to 0.100%. Flux recovery of 74.08% was attained for the usage of 0.100% of NaOH solution in cleaning process.
A fundamental study of chemical cleaning on membrane fouled in glycerin purification_Jonathan Roy Ng Soon Ming_K4_2011_NI