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Effect of feeding regime and the sludge age on the fate of acetate and the microbial composition in sequencing batch reactor

机译:顺序分批反应器中进料方式和污泥龄对醋酸盐命运和微生物组成的影响

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摘要

The study investigated the effects of the feeding regime on the substrate metabolism under aerobic conditions. Throughout the study, two parallel sequencing batch reactors were operated using either short-term (pulse) or long-term (almost continuous) feeding of acetate at two different sludge ages of two days and eight days. The microbial characterization studies showed that the feeding regime did not change the microbial composition as determined by the fluorescent in situ hybridization (FISH) analysis, however did strongly affect the substrate utilization mechanism. Additionally, the same microbial culture was able to utilize acetate with or without poly-β-hydroxybutyrate (PHB) storage under pulse or continuous feeding, respectively. Conversely, the selected sludge ages induced significant changes in the microbial composition and floe structure, however, the well settling and bulking biomass selected at the sludge ages of eight days and two days, respectively, did not significantly affect the substrate utilization mechanism, where storage or growth prevailed as a result of either pulse or continuous feeding.
机译:该研究调查了有氧条件下饲喂方式对基质代谢的影响。在整个研究过程中,使用两个(两天和八天)不同污泥龄的乙酸盐(短期)或长期(几乎连续)进料操作了两个平行测序间歇反应器。微生物表征研究表明,通过荧光原位杂交(FISH)分析确定,进料方式不会改变微生物组成,但会严重影响底物利用机制。另外,相同的微生物培养物能够分别在脉冲或连续进料下利用具有或不具有聚-β-羟基丁酸酯(PHB)储存的乙酸盐。相反,选择的污泥龄会引起微生物组成和絮凝物结构的显着变化,但是,分别在八天和两天的污泥龄下选择的沉降和膨胀生物量并没有显着影响底物的利用机制,即储存脉冲或连续进食的结果是生长或生长普遍。

著录项

  • 来源
    《Journal of Environmental Science and Health》 |2012年第2期|p.192-203|共12页
  • 作者单位

    Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey,Department of Chemistry, Sapienza University of Rome, Rome, Italy,Istanbul Tech-nical University, Environmental Engineering Department, 34469 Maslak, Istanbul;

    Instituto di Ricerca Sulle Acque C.N.R., Monterotondo, Italy;

    Department of Chemistry, Sapienza University of Rome, Rome, Italy;

    Faculty of Civil Engineering, Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey,Turkish Academy of Sciences, Cankaya, Ankara, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    activated sludge; culture history; PHB storage; sludge age; microbial biodiversity; FISH;

    机译:活性污泥文化史;PHB存储;污泥年龄微生物生物多样性;鱼;

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