Browsing by Author "Nour Sh. El-Gendy"

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    A Study on the Potential of Valorizing Sargassum latifolium into Biofuels and Sustainable Value-Added Products
    (International Journal of Biomaterials : wiley, 2024) Nour Sh. El-Gendy; Mohamed Hosny; Abdallah R. Ismail; Ahmad A. Radwan; Basma A. Ali; Hager R. Ali; Radwa A. El-Salamony; Khaled M. Abdelsalam; Manal Mubarak
    To increase the limited commercial utility and lessen the negative environmental effects of the massive growth of brown macroalgae, this work illustrates the feasibility of valorizing the invasively proliferated Sargassum latifolium into different value-added products. The proximate analysis recommends its applicability as a solid biofuel with a sufficient calorific value (14.82 ± 0.5 MJ/kg). It contains 6.00 ± 0.07% N + P2O5 + K2O and 29.61 ± 0.05% organic C. Its nutritional analysis proved notable carbohydrate, ash, protein, and fiber contents with a rational amount of lipid and a considerable amount of beneficial macronutrients and micronutrients, with a low concentration of undesirable heavy metals. That recommends its application in the organic fertilizer, food, medicine, and animal fodder industries. A proposed eco-friendly sequential integrated process valorized its biomass into 77.6 ± 0.5 mg/g chlorophyll, 180 ± 0.5 mg/g carotenoids, 5.86 ± 0.5 mg/g fucoxanthin, 0.93 ± 0.5 mg/g β-carotene, 21.97 ± 0.5% (w/w) alginate, and 16.40 ± 0.5% (w/w) cellulose, with different industrial and bioprocess applications. Furthermore, Aspergillus galapagensis SBWF1, Mucor hiemalis SBWF2, and Penicillium oxalicum SBWF3 (GenBank accession numbers OR636487, OR636488, and OR636489) have been isolated from its fresh biomass. Those showed wide versatility for hydrolyzing and saccharifying its polysaccharides. A Gram-negative Stutzerimonas stutzeri SBB1(GenBank accession number OR764547) has also been isolated with good capabilities to ferment the produced pentoses, hexoses, and mannitol from the fungal saccharification, yielding 0.25 ± 0.014, 0.26 ± 0.018, and 0.37 ± 0.020 g ethanol/g algal biomass, respectively. Furthermore, in a pioneering step for valuing the suggested sequential biomass hydrolysis and bioethanol fermentation processes, the spent waste S. latifolium disposed of from the saccharification process has been valorized into C-dots with potent biocidal activity against pathogenic microorganisms.
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    Eco-Friendly Extraction of Sustainable and Valorized Value-Added Products From Ulva fasciata Macroalgae: A Holistic Technoeconomic Analysis
    (Hindawi Publishing Corporation, 2025-02-26) Nour Sh. El-Gendy; M. Shaaban Sadek; Hussein N. Nassar; Ahmad Mustafa
    Te present work conducts a detailed technoeconomic analysis of an environmentally friendly zero-waste biorefnery process to valorize marine Ulva fasciata macroalgae into diferent sustainable value-added products. Te proposed sequential fully integrated process yielded 34.89% mineral-rich water extract (MRWE), 2.61 ± 0.5% chlorophyll, 0.41 ± 0.05% carotenoids, 12.55 ± 1.6% starch, 3.27 ± 0.7% lipids, 22.24 ± 1.8% ulvan, 13.37 ± 1.5% proteins, and 10.66 ± 0.9% cellulose. Te Aspen Plus software, utilizing the nonrandom two-liquid (NRTL) model, was applied for process design, simulation, and technoeconomic analysis. Key fndings include a positive net present value (NPV) of $49,755,544.90, a high return on investment (ROI) of 485%, and an internal rate of return (IRR) of 17%. Te anticipated payback period is 7 years, indicating a quick recovery of the initial investment. Tese fndings confrm that Ulva fasciata is a promising resource in the biorefnery industry, providing a viable and eco-friendly alternative for the production of bio-based products and a new market for seaweed-based products.