Abstract
The productivity of membrane process in any application is governed by rate of fouling deposition and membrane cleaning effectiveness. Chemical membrane-cleaning has demonstrated considerable restoration of membrane flux, but their repetitive use causes detrimental effects on membrane structure and properties thereby resulting in premature ageing and reduced lifespan of membranes. The objective of this study was to determine the long-term impact of conventional cleaning chemicals such as sodium hydroxide (NaOH), sodium hypochlorite (NaOCl) and hydrochloric acid (HCl) on physical and chemical properties of tubular polyvinylidene fluoride (PVDF) membrane. The membrane samples were soaked in individual chemicals for a total duration of 720 h and the results indicated that each chemical had different extent of ageing effects on membrane conformation and chemistry
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