کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6585141 | 456377 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microbial community structure of anoxic-oxic-settling-anaerobic sludge reduction process revealed by 454-pyrosequencing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
To understand process performance and microbial community structure in oxic-settling-anaerobic (OSA) sludge reduction process, an anoxic-OSA (AÂ +Â OSA) system and a conventional anoxic-oxic (AO) system were operated for 200Â days. Both systems were almost equally effective in the removal of COD and ammonium nitrogen, but AÂ +Â OSA system showed higher nitrogen removal efficiency owing to denitrification and the release of soluble organic matters in the sludge holding tank (SHT). AÂ +Â OSA process reduced sludge production by 30.4% with observed sludge yield of 0.179Â gSS/gCOD. Pyrosequencing results revealed that although core populations were shared with highly functional organization, the relative abundance and stability of microbial communities in AÂ +Â OSA system were higher than AO system. Classes Anaerolineae and Actinobacteria responsible for hydrolysis and fermentation of organic matters were enriched in SHT and played an important role in sludge reduction of AÂ +Â OSA process. Specific comparison down to the genus level revealed the enrichment of anaerobic fermentative bacteria (Azospira, Propionivibrio and Sulfuritalea) and slow growers (Trichococcus) in AÂ +Â OSA system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 266, 15 April 2015, Pages 249-257
Journal: Chemical Engineering Journal - Volume 266, 15 April 2015, Pages 249-257
نویسندگان
Zhen Zhou, Weimin Qiao, Can Xing, Ying An, Xuelian Shen, Weichao Ren, Lu-man Jiang, Luochun Wang,