Reduced backwash volume process

摘要: A method of backwashing a membrane filtration module, where the module includes one or more membranes located in feed-containing vessel. The having permeable wall which is subjected to operation wherein feed liquid containing contaminant matter applied side and filtrate withdrawn from other wall. steps suspending operation; aerating surface with gas bubbles dislodge fouling materials therefrom; recommencing while flow vessel for predetermined period; again performing backwash removing at least some dislodged feed- vessel; then operation.