01.Nov.2025
Rising industrial waste generation has intensified the demand for sustainable energy solutions, with anaerobic co-digestion offering a promising approach for waste management and renewable energy production. This study examines the anaerobic co-digestion of organic food waste (OFW) and waste-activated sludge (WWS) under mesophilic conditions (37 °C) to optimize substrate ratios and enhance biogas production compared to mono-digestion. The highest yield was achieved at a 90:10 OFW:WWS ratio, producing 884 ± 51 NmLBG g−1 VS with 65 % biomethane content, a 7.3 % improvement over OFW mono-digestion. Experiments showed immediate biogas production with no lag phase across all OFW percentages (0 %–100 %). Four kinetic models: First-Order (FO), Gompertz, Modified Gompertz (MG), and Logistic Function (LF), were assessed using statistical metrics (R2, NRMSE, paired t-tests) and time range analysis. The Gompertz model exhibited the best statistical fit (R2: 0.9231–0.9963) and predicted a maximum yield (Gmax) of 874.12 NmLBG g−1 VS at 90:10, but its non-zero lag phase conflicted with observations. The MG model, with a zero-lag phase, was selected as most suitable due to its biological relevance and reasonable fit (R2: 0.9231–0.9904). Model predictions (e.g., 851 NmLBG g−1 VS by MG) were within experimental uncertainty, but their bias toward lower values suggests a need for advanced models to enhance late-stage accuracy.Click here for Link
Rising industrial waste generation has intensified the demand for sustainable energy solutions, with anaerobic co-digestion offering a promising approach for waste management and renewable energy production. This study examines the anaerobic co-digestion of organic food waste (OFW) and waste-activated sludge (WWS) under mesophilic conditions (37 °C) to optimize substrate ratios and enhance biogas production compared to mono-digestion. The highest yield was achieved at a 90:10 OFW:WWS ratio, producing 884 ± 51 NmLBG g−1 VS with 65 % biomethane content, a 7.3 % improvement over OFW mono-digestion. Experiments showed immediate biogas production with no lag phase across all OFW percentages (0 %–100 %). Four kinetic models: First-Order (FO), Gompertz, Modified Gompertz (MG), and Logistic Function (LF), were assessed using statistical metrics (R2, NRMSE, paired t-tests) and time range analysis. The Gompertz model exhibited the best statistical fit (R2: 0.9231–0.9963) and predicted a maximum yield (Gmax) of 874.12 NmLBG g−1 VS at 90:10, but its non-zero lag phase conflicted with observations. The MG model, with a zero-lag phase, was selected as most suitable due to its biological relevance and reasonable fit (R2: 0.9231–0.9904). Model predictions (e.g., 851 NmLBG g−1 VS by MG) were within experimental uncertainty, but their bias toward lower values suggests a need for advanced models to enhance late-stage accuracy.
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15.Oct.2025
24.Aug.2025
أنا طالبة في الهندسة الصناعية, اختياري لهذا التخصص كان بناءً على أهميته الكبيرة كمهنة في الحاضر والمستقبل ... رغد بركات
الهندسة الصناعية تساعدك على اتخاذ قرارات أفضل، وتعطي أشكالا أخرى من مبادئ الهندسة بشكل عملي وعلمي في آن. ... محمود صلاح
قسم الهندسة الكيميائية قسم جميل جدا تعلمت فيه الكثير ومما تعلمته فيه جدية العمل وروح الفريق الواحد .. ... رغد الشويكي