کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11024995 | 1701044 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Acidification and recovery of phosphorus from digested and non-digested sludge
ترجمه فارسی عنوان
اسیدی شدن و بازیابی فسفر از لجن هضم شده و غیر هضم شده
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کلمات کلیدی
فسفر، اسیدی شدن، لجن، فلزات سنگین،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
Acidification was used to dissolve phosphorus from digested and non-digested sludge from five wastewater treatment plants in order to make phosphorus accessible for subsequent recovery. More phosphorus was dissolved from digested sludge (up to 80%), with respect to non-digested sludge (â¼25%) and the highest release was observed at pH 2. The acid consumption for digested sludge was higher than for non-digested sludge due to the presence of the bicarbonate buffer system, thus CO2 stripping increased the acid consumption. In all the experiments, the sludge was exposed to acid for 1â¯h. For the five tested sludge types, 60-100â¯mmol o-P was released per added mol H2SO4. It was mainly iron and calcium compounds that accounts for the phosphorus release at low pH. The release of heavy metals was in general low (<30%) for all the wastewater treatment plant, as Zn, Cd and Ni showed the most critical release after acidification of non-digested sludge.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 146, 1 December 2018, Pages 307-317
Journal: Water Research - Volume 146, 1 December 2018, Pages 307-317
نویسندگان
Cejna Anna Quist-Jensen, Lisbeth Wybrandt, Hanne Løkkegaard, Sebastian Buch Antonsen, Henriette Casper Jensen, Asbjørn H. Nielsen, Morten Lykkegaard Christensen,