کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7044461 1457002 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dewatering of bio-sludge from industrial wastewater plant using an electrokinetic-assisted process: Effects of electrical gradient
ترجمه فارسی عنوان
آبگیری لجن زیست محیطی از کارخانه فاضلاب صنعتی با استفاده از روش الکتروکینتیک-کمک: اثر گرادیان الکتریکی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی
An electrokinetic-assisted sludge dewatering (EASD) process was used to evaluate the dewaterability of the bio-sludge cake with moisture content of 68.9%. The cake sample was collected immediately after a belt filter press of an industrial wastewater treatment plant. Results showed that an average of electro-osmosis permeability of 2.2 × 10−5 cm2/V-s was observed. After treatment, the sludge pH values near the anode and cathode were in the range of 6.5-7.5 and 9.5-10.8, respectively. The effectiveness of the EASD process was directly related to the magnitude of the electric current in the system. Increasing the potential gradient would enhance the extent of dewatering efficiency. As a constant electrical gradient of 1.25 V/cm was applied, the moisture content of sludge decreased to 63.6% after 4-h treatment. The moisture content of sludge decreased further to 48.8% as the process operated at an applied potential gradient of 5.0 V/cm. Energy requirement per unit ton of sludge treated was 17.7-86.5 kW h/ton (dry weight). Preliminary cost analysis of the EASD dewatering process showed that approximately a saving of 23% sludge disposal cost could be realized. Results indicated that the EASD process is an economic, viable and effective technology in assisting sludge dewatering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 117, 30 September 2013, Pages 35-40
نویسندگان
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