OXIDATION BEFORE RO FOR WATER REUSE: EFFECTS ON EFFLUENT ORGANIC MATTER AND RO FOULING

摘要

Membrane treatment plants are rapidly becoming an important source for potable or reclaimed water in areas of high population with limited fresh water resources. In the last 10 years, the amount of potable water produced from reverse osmosis (RO) membrane plants has increased dramatically, mostly as desalinated seawater in coastal populated areas (e.g. United Arab Emirates, where as much as 98% of the water is from desalination plants, though not all of which are membrane-driven processes (Mohamed et al., 2005)). Additionally, the use of RO systems to treat wastewater is becoming a viable technology in reuse applications as it can typically remove 90-95% of TDS. Microfiltration (MF), ultrafiltration (UF), and membrane bioreactor (MBR) systems are being incorporated into wastewater treatment plants in order to improve the quality of water discharged from the plant (Radjenovic et al., 2009) and thus provide the potential to hybridize them with RO membranes for an integrated reuse system (Tam et al., 2007).