کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7044002 | 1456925 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fly ash based adsorbent for treating bleaching effluent of kraft pulping process
ترجمه فارسی عنوان
جذب جاذب های خاکستری برای درمان پساب سفید کننده فرایند خمیر کرافت
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کلمات کلیدی
خاکستر پرواز جداسازی، رسوبگذاری، پساب سفید کننده، انعقاد، جذب،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
The bleaching operation of a kraft pulping process generates a large amount of effluents with high organic loads. The affinity of biomass-based fly ash as a low-cost adsorbent for reducing lignin concentration, chemical oxygen demand (COD) and turbidity of the bleaching effluents prior to a biological treatment process was studied in this work. The results showed that the optimized conditions for obtaining the maximum removals of lignin (81.6%) and COD (67.9%) were the fly ash dosage of 6â¯wt% in the effluent and the treatment time of 30â¯min and temperature of 30â¯Â°C. The results also showed that the settling rate of the fly ash in fly ash/effluent suspension systems increased as fly ash dosage increased. Charge neutralization played a key role at a low fly ash dosage (less than 2â¯wt%) for removing lignocellulosic flocs smaller than 10â¯Âµm, while complexion of small flocs to larger ones (with the size of 30-500â¯Âµm) occurred at the higher fly ash dosage in the effluent. Coagulation and adsorption were the main phenomena for the removals of COD, lignin and turbidity at a higher fly ash dosage and a prolonged treatment time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 195, 29 April 2018, Pages 60-69
Journal: Separation and Purification Technology - Volume 195, 29 April 2018, Pages 60-69
نویسندگان
Weijue Gao, Pedram Fatehi,