Presentations by UNESCO-IHE, Institute for Water Education
Matches: 7
Influence of Fouling on the Operation of Low Pressure RO and NF in Treating Water of Impaired Quality
Study to evaluate fouling performance of ultralow pressure RO and NF....
Irreversible Fouling of Ultrafiltration Membranes Caused by Transparent Exoplymer Particles (TEP) in Seawater UF-RO Treatment
Transparent exopolymer particles (TEP) have been associated with biological fouling in reverse osmosis (RO) systems, but their impact on ultrafiltration (UF) systems have only been investigated recently. TEP are very sticky substances and may serve as a binding agent for rejected particles and aid their adhesion to membrane surfaces during dead-end...
(Inline) Coagulation or Precoating for Seawater UF/RO Systems?
Ultrafiltration (UF) is gradually being established as the technology of choice for seawater reverse osmosis (SWRO) pretreatment due to the production of consistent high quality RO feed and small footprint, among others. This study focused on the effect of different coagulation conditions and modes of application on UF performance, both in terms o...
Visualization of Transparent Exopolymer Particles (TEP) on Fouled Membranes
The paper descried a study of application of the alcian blue staining technique in visualizing Transparent Exopolymer Particle substances on Reverse Osmosis membrane surfaces and the prediction of fouling of the surface...
Fouling of UF/MF Membranes: the Role of Transparent Exopolymer Particles (TEP) in Seawater
The paper describes the performance of the ultrafiltration pretreatment system of a seawater desalination plant to verify the effects of Transparent Exopolymer Particles (TEP) in a full?scale system. This confirms the theory that divalent ions in the source water can promote the structural integrity of TEP gels through bridging (e.g. Ca?bridging)...
New developments in fouling indices: Application in seawater reverse osmosis systems
Reliable methods to predict the fouling potential of reverse osmosis (RO) feed waters are important in preventing and diagnosing fouling at the design stage, and for monitoring pretreatment performance during plant operation (Boerlage, 2007). Particles (both inorganic and organic) are one of the possible origins of RO fouling. However, as mentioned...
Redefining Maximum Achievable Mixed Liquor Suspended Solids Concentrations in Membrane Bioreactors: Introducing Dissolved Oxygen in Membrane Bioreactors by Means of an Innovative Delivery Technology
The oxygen transfer efficiency in the aeration process plays a large role in determining the size and footprint of MBR equipment. Higher concentrations of MLSS tend to restrict the oxygen transfer process when using a conventional fine or coarse bubble process. The Supersaturated Dissolved Oxygen Injection System (SDOX) significantly increases oxyg...