کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7070415 | 1459925 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Struvite crystallization under a marine/brackish aquaculture condition
ترجمه فارسی عنوان
کریستالیزاسیون استرویتی تحت شرایط آبزی پرورش دریایی / سیب زمینی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The results in this study show that struvite was formed in the digester at pH 7.7 due to the magnesium naturally present and the released ammonia and phosphate, resulting in low phosphate concentration in the digester. Apparently the digester already provided proper conditions for struvite formation. Under the brackish condition, the estimated thermodynamic solubility product and enthalpy change of struvite formation were 10â13.06 and 25.7 kJ molâ1, respectively. The average crystal size under marine/brackish condition decreased with pH, but increased with temperature. X-ray diffraction measurements indicate struvite (NH4MgPO4·6H2O) and dittmarite (NH4MgPO4·H2O) were predominant phosphorus species produced in filtrates of the digester. However, struvite and newberyite (HMgPO4·3H2O) were the predominant species precipitated from synthetic brackish waters after dosing MgCl2. It is pronounced that (waste)water characteristics played also an important role on the nature of phosphate precipitates. Under high NH4+ condition, phosphorus precipitates containing ammonia were dominant, compared to other amorphous phosphates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 218, October 2016, Pages 1151-1156
Journal: Bioresource Technology - Volume 218, October 2016, Pages 1151-1156
نویسندگان
Xuedong Zhang, Jianmei Hu, Henri Spanjers, Jules B. van Lier,