کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7702445 | 1496859 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimizing dewaterability of drinking water treatment sludge by ultrasound treatment: Correlations to sludge physicochemical properties
ترجمه فارسی عنوان
بهینه سازی آب آشامیدنی لجن درمان آب آشامیدنی با درمان اولتراسوند: همبستگی با خواص فیزیکوشیمیایی لجن
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
لجن تصفیه آب آشامیدنی، آبگیری ارگانیزم های حل شده سونوگرافی، همبستگی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
چکیده انگلیسی
Sludge dewatering has proven to be an effective method to reduce the volume of sludge. In this study, drinking water treatment sludge (DWTS) was treated by ultra-sonication under variable conditions comparing two sonoreactor types (bath and probe), four frequencies (25, 40, 68, 160â¯kHz) and four energy density levels (0.03, 1, 3, 5â¯W/mL). The effects of these conditions were studied using specific resistance to filtration and capillary suction time as measures of dewaterability, and floc size, the Brunauer, Emmett and Teller (BET) specific surface area and Zeta potential to determine treated sludge characteristics. The results indicated that the dewaterability of sonicated sludge improved at relatively low energy densities of 0.03 and 1.0â¯W/mL, while an optimum for sonication duration (within 10â¯min) was also identified. Higher frequencies (tested up to 160â¯kHz) with acoustic energy density of 0.03â¯W/mL also reduced the dewatering property. At higher energy densities of 3.0 and 5.0â¯W/mL, dewaterability of sludge deteriorated regardless of ultra-sonication time, with an increase of solubilized organic matter content and severely changed floc characteristics. The deterioration of the dewatering capacity was closely related to the considerably reduced floc sizes, dissolution of proteins and polysaccharides, and to the Zeta potential of sonicated sludge flocs. The dewaterability was not correlated with BET specific surface area. Mechanistic explanations for the observations were discussed by analyzing corrosion patterns of aluminum foil as a measure for cavitation field distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 45, July 2018, Pages 95-105
Journal: Ultrasonics Sonochemistry - Volume 45, July 2018, Pages 95-105
نویسندگان
Zhili Meng, Zhiwei Zhou, Dan Zheng, Lujian Liu, Jun Dong, Yanling Yang, Xing Li, Tingting Zhang,