کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8099410 | 1522077 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecular disruption through acid injection into waste activated sludge - A feasibility study to improve the economics of sludge dewatering
ترجمه فارسی عنوان
اختلال مولکولی از طریق تزریق اسید به لجن فعال - تصحیح امکان سنجی برای بهبود اقتصاد آبگیری لجن
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کلمات کلیدی
اسیدی شدن، لجن، آبگیری اسید سولفوریک، سولفات فریک، تصفیه فاضلاب،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Industrial productivity is often judged solely by the primary product's marketability, while opportunities for secondary products derived from process by-products are often overlooked. In paper mills, large volumes of moisture-rich paper mill residuals (cellulose sludge) are produced, for which commercial use is currently difficult. Port Hawkesbury Paper LP, Port Hawkesbury, Nova Scotia, produces over 7Â t/hr of waste sludge with a seasonally-dependent dryness ranging from 25 to 38% (w/w). Various chemical or mechanical dewatering options exist; however, knowledge of the unique sludge composition and properties is essential to predicting how the product will react under each method. Sonication, Fournier rotary press technology, freeze/thaw cycling, and gravity drying were among the dewatering opportunities briefly explored outside of the chosen method, acidification. Notably, many industries utilizing dewatering technologies may not be producing value-added by-products, while geographic and climatic placement may limit processes which are possible for others. In the present study examining enhanced end-use value, further dewatering occurred through a comparative in situ experiment contrasting sulfuric acid and ferric sulfate acidification (direct acid injection into sludge). While both proton donors acidified the sludge and decreased moisture content, sulfuric acid was the more cost-effective option, yielding an â¼4% increase in dryness, with commensurate economic and environmental benefits.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 176, 1 March 2018, Pages 966-975
Journal: Journal of Cleaner Production - Volume 176, 1 March 2018, Pages 966-975
نویسندگان
Brittany A. MacDonald, Ken D. Oakes, Michelle Adams,