کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7081198 | 1460000 | 2013 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Treatment of swine wastewater using chemically modified zeolite and bioflocculant from activated sludge
ترجمه فارسی عنوان
درمان فاضلاب خوک با استفاده از زئولیت شیمیایی اصلاح شده و بیو فلکشن از لجن فعال
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Sterilization, alkaline-thermal and acid-thermal treatments were applied to activated sludge and the pre-treated sludge was used as raw material for Rhodococcus R3 to produce polymeric substances. After 60 h of fermentation, bioflocculant of 2.7 and 4.2 g Lâ1 were produced in sterilized and alkaline-thermal treated sludge as compared to that of 0.9 g Lâ1 in acid-thermal treated sludge. Response surface methodology (RSM) was employed to optimize the treatment process of swine wastewater using the composite of bioflocculant and zeolite modified by calcining with MgO. The optimal flocculating conditions were bioflocculant of 24 mg Lâ1, modified zeolite of 12 g Lâ1, CaCl2 of 16 mg Lâ1, pH of 8.3 and contact time of 55 min, and the corresponding removal rates of COD, ammonium and turbidity were 87.9%, 86.9%, and 94.8%. The use of the composite by RSM provides a feasible way to improve the pollutant removal efficiencies and recycle high-level of ammonium from wastewater.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 143, September 2013, Pages 289-297
Journal: Bioresource Technology - Volume 143, September 2013, Pages 289-297
نویسندگان
Junyuan Guo, Chunping Yang, Guangming Zeng,