کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6671890 1427549 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Treatability of landfill leachate combined with sanitary sewage in an activated sludge system
ترجمه فارسی عنوان
قابلیت تصفیه فاضلاب زباله در کنار سیستم فاضلاب بهداشتی در یک سیستم لجن فعال
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Landfill leachate is one of the major problems generated from waste; it has high concentrations of biodegradable and refractory organic and inorganic matter such as ammonia and heavy metals. The combined treatment of leachate with sewage has been used in various sewage treatment plants in the world. However, there are still many questions and uncertainties about the process, especially the effects of adding leachate to the treatment system. In this context, the objective of this work is to evaluate the efficiency of combined leachate/sewage treatment in activated sludge under different conditions. Treatability experiments were carried out using a bench scale (SBR) process using the volumetric proportions of 0 (control), 2 and 5% leachate under different experimental conditions. Experiment 2 (leachate pre-treated by alkalinization and air stripping) was technically more feasible, achieving removal efficiencies of BOD, COD and DOC above 97%, 82%, 60%, respectively, and the highest diversity indices of the bacterial and eukaryotic communities and flake structure stability were observed up to a volumetric ratio of 2% of pre-treated leachate. The DGGE technique used showed that populations of eukaryotes were apparently the most affected with increasing proportions of 2%-5% of the mixture, mainly for experiments 3 (B3R2) and 4 (B4R4), where the lowest diversity indices of these populations were found.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Water Process Engineering - Volume 23, June 2018, Pages 119-128
نویسندگان
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