کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
641147 1456985 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamic changes in the characteristics and components of activated sludge and filtrate during the pressurized electro-osmotic dewatering process
ترجمه فارسی عنوان
تغییرات پویا در ویژگی ها و اجزای لجن فعال و فیلتراسیون در طی فرآیند آبگیری اسمز معکوس
کلمات کلیدی
آب آشامیدنی الکترو اسموتی تحت فشار، لجن فعال تغییر دینامیک آب محدود، ساختار داخلی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• Pressure–voltage had a synergistic effect on activated sludge dewatering.
• Parallel slits formed in activated sludge at electrical compression stage.
• Bound water/free water increased by 7.73 times after electrical compression.
• Cell rupture in AS matrix occurred at electrical compression stage.

The performance and process of pressurized electro-osmotic dewatering (PEOD) technology for activated sludge (AS) were investigated. In PEOD process, a single pressure of 600 kPa only removed a small amount of free water and bound water in AS, whereas both kinds of water further decreased to 0.24 g g−1 dry solid and 0.25 g g−1 dry solid after the application of 50 V voltage at electrical compression (EC) stage. During the PEOD process, the loosely network structure was gradually ruined, and a quantity of narrow and parallel slits generated in dewatered AS at EC stage. The contents of organic matters in filtrate increased at all PEOD stages and humic acid-like organics formed at EC stage. Using the response surface method (RSM), the optimum dewatering conditions were determined as a combination of 401 kPa pressure and 50 V voltage, which gave a dry solids content and energy consumption of 41.90% (wt%) and 0.153 kWh per kg removed water.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 134, 25 September 2014, Pages 1–11
نویسندگان
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