The operation of a spiral-wounded nanofiltration membrane module used continuously for three years in order to purify different pretreated olive mill wastewater streams will be discussed. The membrane module was for the first time used at the beginning of year 2006 on a batch pilot scale plant for critical flux studies and wastewater treatment in our laboratories. The olive mill waste... https://parisnaturalfoodes.shop/product-category/vitamin-c-crystals-1000mg/