کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
153042 456518 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Struvite precipitation assessment in anaerobic digestion processes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Struvite precipitation assessment in anaerobic digestion processes
چکیده انگلیسی

Struvite precipitation causes important operational problems during the sludge treatment process, especially when EBPR sludge is treated. Predicting struvite formation is critical to be able to design process alternative that best minimises struvite precipitation. With this aim, phosphorus precipitation in an anaerobic digestion pilot plant was studied using experimental data and mass balance analysis. The results obtained showed significant phosphorus precipitation as struvite (58% of the fixed phosphorus) and a low precipitation of calcium phosphates (15%), forming mainly hydroxyapatite (HAP). The rest of the phosphorus fixed in the digester (27%) was attributed to adsorption processes on solid surfaces. The effect of pH and available phosphorus concentration on phosphorus fixation in the digester was also studied, indicating that a decrease of available PO4-P concentration in the digester can minimise phosphorus precipitation, reducing the maintenance problems associated with struvite deposits.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 141, Issues 1–3, 15 July 2008, Pages 67–74
نویسندگان
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