کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6466635 1422965 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrodynamic cavitation of brewery spent grain diluted by wastewater
ترجمه فارسی عنوان
حفره هیدرودینامیکی آبجوسازی دانه ای که توسط فاضلاب رقیق شده است را نگهداری می کند
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- The BSG biodegradability index increased via cavitation from 0.074 to 0.091.
- Solubilization of carbohydrates occurred with related monosaccharides release of 87%.
- Enhanced biodegradability was attributed to the physical cavitation effects.
- FT-IR/PAS analysis did not reveal the formation of new compounds via cavitation.

This study examined the influence of hydrodynamic cavitation on the biodegradability and composition of brewery spent grain diluted by mechanically pre-treated municipal wastewater. An orifice plate with a conical concentric hole (3/10 mm as an inlet/outlet diameter) was used as the constriction in the cavitation device; the corresponding cavitation number was 0.036. Hydrodynamic cavitation was applied at an inlet pressure of 7 bar, maintaining 30 recirculation passes through the cavitation zone. As a result, the concentration of soluble organic compounds (expressed as soluble chemical oxygen demand), BOD5 value, and BOD5/COD ratio increased. The BOD5/COD ratio was enhanced from 0.074 to 0.091, indicating improved biodegradability of the brewery spent grain. Moreover, solubilization of carbohydrates occurred, as confirmed by the hemicellulose removal with a related monosaccharides release of 87%. On the other hand, the COD value and the concentrations of both total solids and volatile solids decreased significantly, revealing the effective destruction of complex organic compounds via cavitation.Additionally, Fourier transform infrared photoacoustic spectroscopy analysis was conducted to check the findings. It confirmed that hydrodynamic cavitation did not lead to the formation of new compounds that would interfere with the biological treatment of the brewery spent grain diluted by mechanically pre-treated wastewater.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 313, 1 April 2017, Pages 946-956
نویسندگان
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