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首页> 外文期刊>Journal of Environmental Science and Health >Effect of temperature over start-up of a groundwater-denitrifying submerged filter inoculated with psychrotolerant bacteria
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Effect of temperature over start-up of a groundwater-denitrifying submerged filter inoculated with psychrotolerant bacteria

机译：温度对接种了抗精神病菌的地下水脱硝潜水过滤器启动的影响

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摘要

Inoculation of a submerged filter was carried out using three bacterial strains previously selected on the basis of their psychrotolerance and high denitrifying activity with the aim of apply selective inoculation to a submerged filter system for the denitrification of groundwater. Laboratory-scale assays were carried out at 5, 10 20 and 30℃. Surface scanning microscopy was used to evaluate the capacity of each inoculant to colonise the support. In all cases a biofilm in the initial stages of development was observed, with abundant connection material and cells in division. Increase in temperature had a negative effect on colonisation evolution, motivated by the use of psychrotolerant bacteria. Each inoculant presented a different colonisation optimum, but always at temperatures under 20℃. To monitor system setup, concentrations of total nitrogen, nitrate and nitrite after treatment were measured. In most cases, the stabilisation phase was observed to be longer at lower temperatures, independently of the inoculant employed. However, at 5℃, only one of the inoculants reached steady-state phase with total nitrogen elimination. In all the assays, an accumulation of nitrite was observed during stabilisation phase. At lower temperatures, maximum concentrations of nitrite were greater and were reached after longer operation times. Use of selective inoculants was shown to promote subsequent development of a stable biofilm achieving efficient elimination of nitrate from the influent. This occurs regardless of the inoculant employed, except at a temperature of 5℃, at which the type of inoculant conditions system setup. However, colonisation capacity of the inoculant at low temperatures is not a determining factor.
机译：浸没式过滤器的接种是使用先前根据其耐化学性和高反硝化活性选择的三种细菌菌株进行的，目的是将选择性接种应用于浸没式过滤器系统以对地下水进行反硝化。在5、10 20和30℃下进行实验室规模的测定。表面扫描显微镜用于评估每种接种剂定殖在载体上的能力。在所有情况下，都观察到了处于发育初期的生物膜，其中连接物质和细胞处于分裂状态。由于使用了抗精神病的细菌，温度升高对定居进化产生了负面影响。每种接种物均表现出不同的最佳定植条件，但始终在20℃以下。为了监测系统设置，测量了处理后总氮，硝酸盐和亚硝酸盐的浓度。在大多数情况下，观察到稳定阶段在较低温度下更长，与所使用的接种剂无关。然而，在5℃时，只有一种接种物达到了稳态阶段，并且完全消除了氮。在所有测定中，在稳定阶段均观察到亚硝酸盐的积累。在较低的温度下，亚硝酸盐的最大浓度更高，并且在更长的操作时间后达到。已证明使用选择性接种剂可促进稳定生物膜的后续开发，从而实现从进水液中有效消除硝酸盐。不论使用哪种接种剂，都会发生这种情况，除了在5℃的温度下（在该温度下，接种剂的类型取决于系统的设置）。但是，孕育剂在低温下的定殖能力不是决定因素。

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  • 来源
    《Journal of Environmental Science and Health》 |2009年第12期|1298-1305|共8页
  • 作者

    M. A. GOMEZ; J. GONZALEZ-LOPEZ; A. DE LA RUA;

  • 作者单位

    Technologies for Water Management and Treatment Group, Department of Civil Engineering and Water Research Institute, University of Granada, Granada, Spain;

    Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain;

    Technologies for Water Management and Treatment Group, Department of Civil Engineering and Water Research Institute, University of Granada, Granada, Spain;

  • 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

    psychrotolerant denitrifying bacteria; submerged filter; biofilm formation; temperature; nitrite;

    机译：抗精神病的反硝化细菌;潜水过滤器生物膜形成;温度;亚硝酸盐;

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