Novel cleaning and fouling control in forward osmosis membranes for wastewater reuse

Title
Novel cleaning and fouling control in forward osmosis membranes for wastewater reuse
Authors
유영범서선근이석헌
Keywords
membrane fouling; cleaning; wastewater reuse; forward osmosis
Issue Date
2010-10
Publisher
IWA MTWR 2010
Abstract
Currently, Forward osmosis (FO), which is a potential alternative to pressure-driven membrane processes such RO in certain application, has become increasingly popular for various advantages. One of them is that FO uses less electronic energy than pressure-driven membrane as RO. FO has also another advantage, with higher recovery and lower fouling because it is not operated under the high pressure. In FO process, it is possible to pull water across a semi-permeable membrane from the feed water, using a concentrated draw solution which generates high osmotic pressure. The draw solute in the diluted draw solution is to be separated for producing clean water (Cornelissen et al., 2008; Mi and Elimelech, 2008). In fact, as FO process carries on, osmotic pressure decreases due to the diluted draw solution and flux declines as a result of this. However, it is just a natural phenomenon for FO operation. Therefore, it does not seem to be a significant problem of FO. The biggest problem of all membranes process including RO and FO is membrane fouling. A lot of studies about RO fouling reduction have been carried out. On the other hand, there have been few studies on FO fouling reduction in recent years. This study examines cleaning and fouling control in forward osmosis membranes.
URI
http://pubs.kist.re.kr/handle/201004/38625
Appears in Collections:
KIST Publication > Conference Paper
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