کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
149624 456435 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Long term operation of a granular sequencing batch reactor at pilot scale treating a low-strength wastewater
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Long term operation of a granular sequencing batch reactor at pilot scale treating a low-strength wastewater
چکیده انگلیسی

Aerobic granular sludge is presented as an alternative technology to conventional activated sludge processes for the treatment of low-strength wastewaters. Results obtained with granular aerobic reactors at laboratory scale are promising but, there are few studies carried out at pilot scale. Therefore, more information about the stability of granules and their performance at larger scale is needed to establish if aerobic granulation could be a feasible treatment. With this aim, a 100 L granular sequencing batch reactor (GSBR) operating at high loading rate and treating low-strength wastewater for simultaneous carbon, nitrogen and phosphorus removal was operated for 11 months. Mature granules prevailed in the GSBR during a period of 5 months (from days 150 to 330), with a SVI30 of 13 ± 6 mL g−1 TSS, a granule density around 114 ± 5 g TSS L−1 and an average particle size of 2.4 mm. The biological nitrogen removal with mature granules was mainly performed via nitrite, probably due to the large granule size achieved. Nitrification efficiency was higher than 75% and occurred simultaneously with denitrification during the aerobic phase of the GSBR. A progressive accumulation of P-salts (probably apatite), was found from days 150 to 300, which could enhance the destabilization of granules at the end of the experimental period.


► A GSBR at pilot scale was stably operated during almost a year.
► The GSBR removed C, N and P from a low-strength wastewater at high loading rates.
► Long term operation with EBPR leads to the accumulation of inorganic particles in the granules.
► BNR was via nitrite, and simultaneous nitrification and denitrification was achieved.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volumes 198–199, 1 August 2012, Pages 163–170
نویسندگان
, , , , , ,