کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6289568 | 1301765 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Saline adaptation of granules in mesophilic UASB reactors
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
VFATOCUASBSCODVolatile fatty acids - اسیدهای چرب فرارchemical oxygen demand - تقاضای اکسیژن شیمیاییUASB reactor - راکتور UASBMesophilic conditions - شرایط مزوفیلsoluble chemical oxygen demand - محلول شیمیایی اکسیژن مورد نیاز استup-flow anaerobic sludge blanket - پودر لجن بی هوازی بالا جریانCod - کادوTotal organic carbon - کل کربن آلی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
علوم زیست محیطی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We exposed mesophilic up-flow anaerobic sludge blanket (UASB) reactors to high concentrations of NaCl to elucidate the saline adaptation capacity of their granular sludge. We operated 10 lab-scale UASB reactors at 37 °C and added NaCl to the influent either abruptly or gradually. With abrupt addition, NaCl concentrations were increased from 0 g Lâ1 to 20, 30, 35, 40, 45, or 50 g Lâ1. With gradual addition, the NaCl concentrations were gradually increased from 0 to 64 g Lâ1 or 0 to 40 g Lâ1. We successfully saline-adapted the granules up to 32 g NaCl Lâ1, while maintaining high reactor performance, suggesting that 32 g NaCl Lâ1 is a practical level for system operation. In the UASB reactors gradually exposed to 32 g Lâ1 NaCl, methane production decreased by only 13%. We also learned that combining abrupt and gradual salinity increases could shorten the adaptation period. Thus we were able to shorten the adaptation period to only 30 days by increasing the salinity abruptly to 20 g Lâ1, followed by gradual adaptation to 30 g NaCl Lâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 65, Issue 1, January 2011, Pages 65-72
Journal: International Biodeterioration & Biodegradation - Volume 65, Issue 1, January 2011, Pages 65-72
نویسندگان
N. Kimata-Kino, S. Ikeda, N. Kurosawa, T. Toda,