limitations to UF development and widespread use [Choksuchart, et. al. 2002; Park, et. al. 2002]. However the cost of UF technology has significantly decreased within past five years. Capital costs were found to depend not only on the raw water quality (flux) and the plant capacity but also on the year on construction [Laine, et. al. 2000]. The term fouling includes the totality of phenomena responsible for decreases of permeate flux over a period of time, except those linked to membrane compaction and mechanical characteristics modification [Anselme & Jacobs, 1996]. Numerous research studies have been conducted to study the mechanisms and factor affecting flux decline as related to the fouling phenomenon including main source of fouling during membrane processes