کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4481234 1623095 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of influent wastewater communities on temporal variation of activated sludge communities
ترجمه فارسی عنوان
تأثیر جوامع فاضلاب نفوذ بر تنوع زمانی جوامع لجن فعال
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• The temporal variation of influent and bioreactor bacterial communities was evaluated.
• The two communities differed in terms of diversity and composition.
• Small portion of bioreactor community was shared with influent community.
• The influent relative species abundance was not maintained in the bioreactor.
• Species sorting processes explained a majority of the community temporal dynamics.

Continuously feeding influent wastewater containing diverse bacterial species to a wastewater treatment activated sludge bioreactor may influence the activated sludge bacterial community temporal dynamics. To explore this possibility, this study tracked influent wastewater and activated sludge bacterial communities by pyrosequencing 16S rRNA genes from four full-scale wastewater treatment plants over a 9-month period. The activated sludge communities showed significantly higher richness and evenness than the influent wastewater communities. Furthermore, the two communities were different in composition and temporal dynamics. These results demonstrate that the impact of the influent wastewater communities on the activated sludge communities was weak. Nevertheless, 4.3–9.3% of the operational taxonomic units (OTUs) detected in the activated sludge were shared with the influent wastewater, implying contribution from influent wastewater communities to some extent. However, the relative OTU abundance of the influent wastewater was not maintained in the activated sludge communities (i.e., weak neutral assembly). In addition, the variability of the communities of the shared OTUs was moderately correlated with abiotic factors imposed to the bioreactors. Taken together, temporal dynamics of activated sludge communities appear to be predominantly explained by species sorting processes in response to influent wastewater communities.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 73, 15 April 2015, Pages 132–144
نویسندگان
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