Print Email Facebook Twitter Cake layers and long filtration times protect ceramic micro-filtration membranes for fouling Title Cake layers and long filtration times protect ceramic micro-filtration membranes for fouling Author Lu, J. Faculty Civil Engineering and Geosciences Department Water Management Date 2013-01-11 Abstract The objective of this research was to decrease membrane fouling of a ceramic microfiltration system and at the same time increase the recovery. A conventional operation in micro- and ultrafiltration is an in-line coagulation and a frequent hydraulic backwash. The idea about these frequent backwashes is to limit the accumulation of fouling on the membrane. But the cake layer of iron or alum flocks can also protect the membrane for pore blocking and a frequent backwash can expose the membrane for particles that cause pore blocking. The frequent backwash is also using a lot of permeate. In this way the net flux is lower than the actual flux and the recovery can be as low as 60 to 70%. In this research it was hypothesized that this cake layer worked as a membrane protecting layer and was accumulating on the top of membrane by long filtration backwash intervals (>6 hours). Also a layer of powdered activated carbon was put on the membrane at the start of a filtration cycle (pre-coat) and combined with an iron coagulation. To reference this document use: http://resolver.tudelft.nl/uuid:14e25df3-af64-4140-85c6-9cf35cffbd8f Publisher Water Management Academic Press ISBN 978-94-6186-103-0 Source De watercyclus: daar zit wat in! 65ste Vakantiecursus Drinkwater en Afvalwater, VC2013, Delft, 11 januari 2013 Part of collection Institutional Repository Document type conference paper Rights (c) 2013 Lu, J. Files PDF 292252.pdf 2.33 MB Close viewer /islandora/object/uuid:14e25df3-af64-4140-85c6-9cf35cffbd8f/datastream/OBJ/view