BROWSE

AUTHOR PROFILE

Browsing by Author El-Mekkawi, Samar A.

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 4 of 4
  • BB

  • Application of response surface methodology for color removing from dyeing effluent using de-oiled activated algal biomass

    • Authors: El-Mekkawi, Samar A.;  Advisor: -;  Participants: Abdelghaffar, Rehab A.; Abdelghaffar, Fatma; El-Enin, S. A. Abo (2021)

  • Optimization is carried out using the desirability approach of the process parameters for maximum dye removal%. The ANOVA analysis of the predicted quadratic model elucidated significant model terms with a regression coefficient value of 0.97, F value of 109.66, and adequate precision of 34.32 that emphasizes the applicability of the model to navigate the design space. The optimization depends on the priority of minimizing the time of the process to save energy and treating high concentrated effluent resulted in removal % up to 83.5%. The chemical structure and surface morphology of AC, and the dye-loaded biomass (AB) were characterized by Fourier transform infrared spectroscopy (FTIR...
  • BB

  • Green waste recycling of peanuts highly contaminated with aflatoxins in clay brick manufacturing

    • Authors: El-Mekkawi, Samar A.;  Advisor: -;  Participants: Sebaei, Ahmed Salem; Amin, Shereen Kamel (2022)

  • The safe disposal of green waste is necessary for a clean environment, with the safe disposal of waste contaminated with aflatoxins being of particular importance. This work presents a novel route for utilizing contaminated grains in the production of clay bricks. In this work, the contaminated peanut (P) with aflatoxins (AFs) is divided into two categories: PA is the contaminated peanut kernel (without the outer shell), and PB is contaminated whole peanut grain (with the outer shell). Both of ground PA and PB were used to replace the clay in fired building bricks. The raw materials were characterized using X-ray fluorescence (XRF), X-ray diffraction (XRD), and thermo-gravimetric anal...
  • BB

  • Optimization of cultivation conditions for Microcystis aeruginosa for biodiesel production using response surface methodology

    • Authors: El-Mekkawi, Samar A.;  Advisor: -;  Participants: El-Ibiari, N. N.; El-Ardy, Ola A.; Abdelmonem, Nabil M.; Elahwany, Ahmed H.; Abadir, Magdi F.; Ismail, Ibrahim M. (2020)

  • The selection of the most suitable strain for biodiesel production was based on the oil content. The results revealed that the oil contents of Nannochloropsis sp., S. platensis, S. obliquus, and M. aeruginosa are 8%, 12%, 16%, and 20%, respectively; the lipid productivities are 2, 4.8, 5.6, and 6 mg·L− 1·d− 1, respectively; and the biomass productivities are 25, 40, 35, and 30 mg·L− 1·d− 1, respectively. M. aeruginosa has the highest lipid content and the highest lipid productivity which is desired for biodiesel production. Examining the S/V ratios of 1.8, 0.9, 0.63, and 0.48, the results revealed that the biomass yield for M. aeruginosa is 23.3, 45, 42.4, and 33.8 mg·L− 1·d− 1, respe...
  • BB

  • Optimization of some fermentation conditions for bioethanol production from microalgae using response surface method

    • Authors: El-Mekkawi, Samar A.;  Advisor: -;  Participants: Abdo, Sayeda M.; Samhan, Farag A.; Ali, Gamila H. (2019)

  • In this work, algal biomass harvested from a pilot-scale high rate algal pond (HRAP) was fermented anaerobically using immobilized Saccharomyces cerevisiae (ATCC 4126). The HRAP was constructed at the Zenin wastewater treatment plant (WTP), Giza, Egypt. A separate hydrolysis fermentation process (SHF) was applied for algal biomass. The effect of the algal biomass amount, the yeast volume (% v/v), and the time of fermentation as three independent variables were studied simultaneously and analyzed statistically using Design-Expert software V6.0.8. The harvested algal biomass from HRAP contains 45% carbohydrates and was dominated by Microcystis sp. The results revealed that optimum bioet...