کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9468195 | 1317007 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Halophilic biological treatment of tannery soak liquor in a sequencing batch reactor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
TDSALRHRTSBRSEPsOLRBOD5MLVSSTKNSVI - ALLWastewater treatment - تصفیه فاضلابchemical oxygen demand - تقاضای اکسیژن شیمیاییSuspended solids - جامدات معلقSequencing batch reactor (SBR) - رآکتور دسته ای توالی (SBR)Sequencing batch reactor - راکتور بسته توالیhydraulic retention time - زمان هیدرولیکیSludge volume index - شاخص حجم لجنTotal dissolved solids - مجموع جامدات حل شدهmixed liquor volatile suspended solids - مواد جامد معلق فرار مخلوط شده استOrganic loading rate - نرخ بارگیری آلیTannery effluent - پساب توت فرنگیCod - کادو
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Hypersaline wastewater (i.e. wastewater containing more than 35 g lâ1 total dissolved solids (TDS)) is generated by various industrial activities. This wastewater, rich in both organic matter and TDS, is difficult to treat using conventional biological wastewater treatment processes. Among the industries generating hypersaline effluents, tanneries are prominent in India. In this study, tannery wastewater from soak pit was treated in a lab-scale SBR for the removal of organic matter. The characterisation of the soak liquor showed that this effluent is biodegradable, though not easily, and highly variable, depending on the origin and the nature of the hides. TDS was in the range of 21-57 g lâ1 and COD was in the range of 1.5-3.6 g lâ1. This soak liquor was biologically treated in an aerobic sequencing batch reactor seeded with halophilic bacteria, and the performance of the system was evaluated under different operating conditions with changes in hydraulic retention time, organic loading rate and salt concentration. The changes in salinity appeared to affect the removal of organic matter more than the changes in hydraulic retention time or organic loading rate. Despite the variations in the characteristics of the soak liquor, the reactor achieved proper removal of organic matter, once the acclimation of the microorganisms was achieved. Optimum removal efficiencies of 95%, 93%, 96% and 92% on COD, PO43â, TKN and SS, respectively, could be reached with 5 days hydraulic retention time (HRT), an organic loading rate (OLR) of 0.6 kg COD mâ3 dâ1 and 34 g NaCl lâ1. The organisms responsible for nitrogen removal appeared to be the most sensitive to the modifications of these parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 39, Issue 8, April 2005, Pages 1471-1480
Journal: Water Research - Volume 39, Issue 8, April 2005, Pages 1471-1480
نویسندگان
O. Lefebvre, N. Vasudevan, M. Torrijos, K. Thanasekaran, R. Moletta,