The photocatalytic reaction using TiO2 suspended to degrade the residues of toxic organic compounds has been extensively studied, but the ultilization of this process has not been recorded on an industrial scale. One of the primary reasons is the separation of TiO2 catalyst from the treated solution mixture. Conventional mechanical separation methods such as centrifugation, flocculation-deposition do not allow for thorough separation and catalytic reuse, whereas the microfiltration / ultrafiltration membrane process has been demonstrated to be capable of composting isolates very suspended particles. Accordingly, in this study, an experimental system separating TiO2-P25 suspension by microfiltration membrane 0.2 µm on laboratory scale was set up. Effects of operating factors: TiO2 concentration, pH value, transmembrane pressure and crosss flow velocity were investigated. Result shown that TiO2 concentration greater than 1 g / l will fundamentally diminish the permeate flux, futhermore, in the transmembrane  pressure differential (∆P) fluctuating from 0.3 to 1.2 bar, the relationship between J and ∆P is a linear relationship. In addition, the study likewise shown that the formation of the cake layer (scale) on the membrane surface is the fundamental driver of the permeate flux degradation over time. These results are the basis for integrating membrane and photocatalytic processes into a complete system for degradation toxic organic compound residues.

This paper focuses on determining three basic factors affecting the capture of market share and expansion of the fruit product market, namely brand, sales and distribution channel and product quality. We seek to answer if there is a significant difference between fruit products which are of high quality, well-branded, distributed and sold through an established system and those without. If yes, whether it can be measured. To find out the difference, we compared prices of fruit products of strong brands and sold in an established sales and distribution system and similar fruit products without brand and sales and distribution system. To measure the impact of these three factors on the possibility in capturing market share of the products, we employed Structural Equation Modeling (SEM). The Confirmatory Factor Analysis (CFA) is utilized to inspect the extent that each factor affects the expansion of fruit product consuming market, thereby evaluating the situation and proposing solutions. Quantitative data is obtained from fruit producers in Long An, Tien Giang, Vinh Long, Ben Tre, Can Tho, Hau Giang, and Dong Thap as well as from consumers in provinces and Ho Chi Minh City in the period from October to December, 2013.

In this study, the degradation of methylene blue (MB) by UV/TiO2/ H2O2 process was ivestigated in an annular reactor. The effects of the factors: TiO2 concentration, H2O2 dosage, UV density, and hydrodynamic conditions on the reaction rate constant were evaluated by the response surface methodology. The results showed that TiO2concentration, H2O2dosage and UV density had a great influence on the kapp, hydrodynamics had a lower influence. Design Expert V.11 software is used to optimize the reaction conditions, the optimal apparent reaction rate constant is 0.168 min-1 under the following conditions: TiO2 concentration of 0.2 g/l, H2O2 dosage is 0.063 mol/l, UV density of 287  W/m2 and Re number is 10000.