کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4909971 1427553 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
AnMBR digestion of mixed WRRF sludges: Impact of digester loading and temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
AnMBR digestion of mixed WRRF sludges: Impact of digester loading and temperature
چکیده انگلیسی
This study compared the performance of a pilot-scale anaerobic membrane bioreactor (AnMBR) and a conventional anaerobic digester (AD) when treating raw mixed sludges from two water resource recovery facilities (WRRF). The study was carried out over a 2-year period and examined ambient (25 °C), mesophilic (35 °C) and thermophilic (55 °C) operations. Four operating conditions that spanned these temperature regimes and a range of loading conditions (0.5-2.5 kg VS/m3 d) were assessed. The AnMBR consistently had greater volatile solids reduction (VSr) and increased methane yields (0.19-0.34 Nm3/kg VS fed) when compared to the AD. The VSr in the AnMBR was maintained at high values (49-64%) at an HRT of 7 days. An energy balance showed improved net energy production was realized using AnMBR over AD due to the higher methane yield (38% increase on average) and higher VSLR employed. The quality of the produced biosolids was assessed and it was found that the TS in the waste stream from the AnMBR were 2-3.4 times more concentrated than those of the AD because of the extended SRTs. The nutrient contents (N and P) of the digested sludges fell within the ranges typically reported. The results of this study extend previous work and are considered applicable to full-scale applications. Further the results suggest the potential benefit of a positive energy balance towards a sustainable practice when treating mixed municipal sludge using AnMBR at ambient and mesophilic operating conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Water Process Engineering - Volume 19, October 2017, Pages 74-80
نویسندگان
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