Abstract: This work studies a novel digester using only solar energy, which presents a good environment and economic solution, especially in remote Saharan areas of ALGERIA. The produced batch solar digester treats the purification plant sludge of ADRAR natural lagoon located in western south of ALGERIA (1500 km from the capital of' ALGERIA). The solar collector incorporated in the digester converts the collected solar energy into thermal energy; this last is used to warm the digester. The period of experimentation was done during the months of autumn and winter when it was cold ambient temperatures. The temperature interval ensured by the solar collector supports a maximum methanization during an important delay of the day inside the digester. This methanization starts the flammable biogas production from the 20th day. Then, the digestate can be used also as fertilizer for the Saharan arable lands poor in organic matter.

Abstract: The ability of a particular banana fibre in removing reactive dyes from textile wastewater was studied in the present work. Locally available ground seeded banana fibre of ≤ 212 µ was used as adsorbent. Initially the adsorbent was tested on standard Novacron Blue FN-R reactive dye solutions and then it was also applied to raw textile wastewater. The adsorbent was found very effective to remove reactive dyes from water. The adsorption was found dependent on pH, contact time, adsorbent/dye ratio and initial concentration of the dye solution. It was found that the adsorption efficiency became maximum at pH 2 and it decreased with increasing pH. The adsorption was quite fast; approximately 90% of removal efficiency was achieved in 5 m, and the adsorption was completed in 20 m under suitable conditions. It was observed that at adsorbent-dye ratio of 333:1, the adsorbent was able to eliminate the reactive dye completely from standard aqueous solution within 20 m at pH 2. The removal efficiency decreased with increasing concentration of dye solution. When the adsorbent was applied to raw wastewater containing three reactive dyes Novacron Blue FN-R, Novacron Yellow FN-2R, and Novacron Red-FN 3GL, it was obtained that 1.0 g of adsorbent was able to convert 30 mL of deep colored wastewater into colorless and transparent water at pH 2. The values of DO, COD, TS, TDS, TSS, salinity and conductivity of wastewater were comparable before and after the interaction with the adsorbent.

Abstract: E-government construction requires technical development and implementation solutions from private sector in the country. Both sectors, tourism and government are facing obstacles and challenges generated by the advance and improvement in the use of ICTs by consumers and citizens. Ksenia et al. (2014) illustrated that there are 21 dimensions of tourist satisfaction toward aesthetic judgment and effects in behavioral intention to visit and revisit. This report presents the Uniqueness dimension’s overview from the 21 dimensions to be visited and discussed using a case study of GCC interviews in order to conduct conclusion and recommendations to the GCC nations.