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<p>Waste Activated Sludge (WAS) produced from wastewater treatment plants (WWTPs) is a significant source of energy due to rich organic matter content. However, its disposal and recovery presents significant environmental challenges. To address this, disintegration processes such as alkaline, thermal, and enzymatic treatments are employed to solubilize organic matter to improve the biodegradability and methane production potential during anaerobic digestion (AD). This study investigates the effectiveness of these disintegration methods, both individually and in combination, to enhance solubilization and methane production. Alkaline disintegration at 0.5&#xa0;M alkaline addition for 48&#xa0;h resulted in the highest solubilization yield and a degree of disintegration (DD) of 46.7%.Thermal disintegration at 127&#xa0;°C for 120&#xa0;min was found to be the optimal time for solubilization, showing the most significant increase in soluble parameters. The enzymatic treatment with pancreatin enzyme was applied at various doses, with 200&#xa0;mg/g TS found to be the most cost-effective for reducing volatile suspended solids (VSS). When combined, alkaline-thermal disintegration (AT) achieved a net DD of 59.5%, significantly improving solubilization and methane production efficiency by 11.7%. In comparison, the thermal-enzyme (TE) method resulted in a 38.3% net VSS reduction and a 11.4% increase in methane production. The study also examined the effects of enzyme-thermal (ET) and thermal-alkaline (AT) disintegration combinations, but these approachs found less effective on sludge solubilization. The results highlight the significance of optimizing disintegration processes to maximize methane yield. The AT and TE combinations demonstrated the highest effectiveness.</p>

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Single and Combined Alkaline, Thermal and Enzymatic Disintegration Methods on Sludge Disintegration and Anaerobic Digestion

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Elif N. Bahçecioğlu,
  • K. Eda Sakınmaz,
  • Oğuzhan Altuntaş,
  • İpek Ayça,
  • İrem Şimşek,
  • F. Dilek Sanin

摘要

Waste Activated Sludge (WAS) produced from wastewater treatment plants (WWTPs) is a significant source of energy due to rich organic matter content. However, its disposal and recovery presents significant environmental challenges. To address this, disintegration processes such as alkaline, thermal, and enzymatic treatments are employed to solubilize organic matter to improve the biodegradability and methane production potential during anaerobic digestion (AD). This study investigates the effectiveness of these disintegration methods, both individually and in combination, to enhance solubilization and methane production. Alkaline disintegration at 0.5 M alkaline addition for 48 h resulted in the highest solubilization yield and a degree of disintegration (DD) of 46.7%.Thermal disintegration at 127 °C for 120 min was found to be the optimal time for solubilization, showing the most significant increase in soluble parameters. The enzymatic treatment with pancreatin enzyme was applied at various doses, with 200 mg/g TS found to be the most cost-effective for reducing volatile suspended solids (VSS). When combined, alkaline-thermal disintegration (AT) achieved a net DD of 59.5%, significantly improving solubilization and methane production efficiency by 11.7%. In comparison, the thermal-enzyme (TE) method resulted in a 38.3% net VSS reduction and a 11.4% increase in methane production. The study also examined the effects of enzyme-thermal (ET) and thermal-alkaline (AT) disintegration combinations, but these approachs found less effective on sludge solubilization. The results highlight the significance of optimizing disintegration processes to maximize methane yield. The AT and TE combinations demonstrated the highest effectiveness.