Sonatrach

About: Sonatrach is a company organization based out in Algiers, Algeria. It is known for research contribution in the topics: Hydraulic fracturing & Structural basin. The organization has 460 authors who have published 494 publications receiving 6339 citations. The organization is also known as: Sonatrach SPA.

Petrography and authigenic chlorite in the Siegenian reservoir rocks, Berkine Basin, eastern Algerian Sahara

Abstract: In Berkine Basin, the Siegenian stage is constituted by clayey sandstones and it contains several reservoir levels especially in the perimeter of Zemlet El Arbi, where the sandstone levels can reach 30 m of thickness. The Siegenian reservoir shows a tidal deposit environment, it is located at depths greater than 3200 m, its average thickness is 200 m in the south and it decreases to 30 m because it is strongly affected by Hercynian orogeny mainly in the northwest of the studied area. Petrographic and X-ray diffraction studies indicate the presence of authigenic chlorite, which is the most important cement in Siegenian sandstones. Chlorite appears in different forms: grain coating, pore lining, pore filling and rarely in the form of oolite. It often has a great impact on petrophysical reservoir qualities by inhibiting authigenic quartz overgrowth in porous space and preserving porosity. Other diagenetic phenomena observed are mechanical compaction, alteration and dissolution of feldspars and biotite, precipitation of clay minerals (smectite, berthierine, chlorite, kaolinite and illite) and precipitation of secondary silica, carbonates, pyrite and haematite.

Parametric Study of COD Reduction from Textile Processing Wastewater Using Adsorption on Cypress Cone-Based Activated Carbon: An Analysis of a Doehlert Response Surface Design

Abstract: In this study, the performance of a cypress cone-based activated carbon was tested for the COD reduction from industrial textile wastewater. These cypress cones were locally collected after maturation. The Doehlert response surface design was used to simulate and optimize the decrease in COD in treated wastewater. The dominant parameters for COD removal in the effluent were the temperature, the amount of adsorbent and the pH of the initial solution. The obtained model fit the experimental results with high precision (R2 > 0.93) and low Fisher probability ( temperature > initial pH. Under the optimal conditions predicted by the regression, a maximum COD reduction could be obtained with a temperature of 319 K at pH 12 and an activated carbon concentration of 1.144 g L−1 after 1 h treatment. Meanwhile, the designed adsorbent realized the decrease in colour (80.4%), COD (19%) and turbidity (67.1%) of wastewater. It could be concluded that cypress cone-based activated carbon is promising in the treatment of textile wastewater. The increase in COD removal rate through hybridization of processes is being considered for future research.

Comparative study of the noise generated by the moto-compressor and that generated by the turbo-compressor

Abstract: The fundamental aim of this study is to compare between the noise generated by the moto-compressor and the noise generated by the turbo-compressor operating 24H/24H on the continuous function mode; these two machines make part of the equipment of the GP1Z, a factory of hydrocarbon treatment. To attain the principal objective of this study we divided our work into two parts, in the first part we followed and evaluated the average level of the noise emitted by the two machines, whereas in the second part we studied the noise propagation emitted by the two machines and its impact on the generation of the noise. The results obtained from this study demonstrate that the noise generated by the turbo-compressor is higher than the noise generated by the moto-compressor. Keywords : noise; moto-compressor; turbo-compressor; noise maping.

A new activated carbon prepared from cypress cones and its application in the COD reduction and colour removal from industrial textile effluent

Abstract: A new activated carbon from local cypress cones (CCAC) was prepared using phosphoric acid as a chemical activating agent. It presented a Brunauer, Emmett and Teller surface area (SBET) equal to 379.5117 ± 2.3509 m2 g−1 with an amorphous nature. Scanning electron microscopy analysis revealed a heterogeneous and random shape of pores. The reduction in colour and chemical oxygen demand (COD) from the industrial aqueous effluent from the textile company “COTITEX” was the principal performance study of the resulting material. The kinetic data of the adsorption process obeyed a pseudo-second-order model with R2 of 0.988. From five studied parameters, only the initial COD concentration, the pH and the temperature influenced the COD reduction at equilibrium. Maximum COD and colour removal, respectively, 19% and 80.4% were recorded under optimal adsorption conditions of 2 g L−1 of the adsorbent amount, 323°K of operating temperature, pH = 11 and a stirring speed = 300 rpm. The present study showed that CCAC could be a proper material for coloured effluent treatment, whereas, for a better COD reduction, pretreatment is required.