Hydrodynamic Cavitation as a Novel Approach for Municipal Sludge Pretreatment for Anaerobic Digester
محل انتشار: یازدهمین کنگره ملی مهندسی عمران
سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 577
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شناسه ملی سند علمی:
NCCE11_283
تاریخ نمایه سازی: 9 شهریور 1398
چکیده مقاله:
One of the main limitations of anaerobic digestion process is slow rate organics hydrolysis. Different pretreatment methods were suggested to enhance sludge hydrolysis and anaerobic digester performance. Sludge pretreatment methods have resulted in cell wall disruption and release of intracellular enzymes to soluble phase which consequently enhance hydrolysis rate. Among pretreatment methods, hydrodynamic cavitation has been recognized as the most convenient method due to higher degradation efficiency and lower energy consumption for cell disruption. In present research effect of secondary sludge pretreatment with cavitational slit venturi was investigated experimentally. Solubility and Turbidity of sludge were increased from 1598 mg/L to 17042 mg/L and 376 NTU to 8300 NTU after 5 hours of pretreatment, respectively. In addition, degradation degree of sludge climbed to 90% after 5 hours of pretreatment. In this research it was recognized that concentration is an effective factor in degradation rate, and the higher concentration is, the higher degradation degree will be.
کلیدواژه ها:
نویسندگان
Elahe Abbasi
Master Science, Shiraz University
Soolmaz saadat
Assistant Prof., Dept. of Civil and Environmental Engineering, Shiraz University
ayoub karimi jashni
Associate Prof., Dept. of Civil and Environmental Engineering, Shiraz University
Mohammad hadi Shafaei
PhD student, Aerospace Engineering, Shiraz University