Reducing Soil Permeability Using In Situ Biofilm-Forming Bacteria: Overcoming Testing Apparatus Challenges

Reducing Soil Permeability Using In Situ Biofilm-Forming Bacteria: Overcoming Testing Apparatus Challenges
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利用原位生物膜形成细菌降低土壤渗透性:克服测试设备的挑战

DOI:
10.1061/9780784482117.018
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发表时间:
2019
期刊:
Geo-Congress 2019
影响因子:
--
通讯作者:
Caslake, Laurie F.
Caslake, Laurie F.
中科院分区:
--
文献类型:
--
作者:
Roth, Mary J.;Caslake, Laurie F.

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已经证明,在饱和沙地中生长生物膜可以将土壤的渗透性降低一个或多个数量级,这可能是减少田间渗漏的可行方法;然而,在正在开发生物膜的土壤样品中获得实验室渗透性结果是困难的。添加养分会导致土壤中生物膜的形成,但也会在管道和渗透性测试仪器的其他区域形成生物膜。此外,一些细菌会产生气体作为新陈代谢的产物,这种气体会聚集在仪器中,干扰液体流动。本文介绍了一种渗透性测试的方法,该方法有效地减少了用营养液处理的多个砂样在60多天的时间内生物膜的生长和气体的收集。
Growing biofilm in saturated sand has been shown to reduce the permeability of soil by one or more orders of magnitude and may be a viable approach to reducing seepage in the field; however, obtaining laboratory permeability results in soil samples where biofilm is being developed is difficult. Adding nutrients results in the formation of biofilm in the soil but also the formation of biofilm in the piping and other areas of the permeability testing apparatus. In addition, some bacteria produce gas as a product of metabolism and this gas can collect in the apparatus and interfere with fluid flow. This paper presents an approach to permeability testing that effectively minimized the growth of biofilm and the collection of gas in the testing apparatus for multiple sand samples treated with a nutrient solution over a period of more than 60 days.
DOI: --
发表时间: 1962
期刊:
影响因子: --
作者:
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通讯作者: D. Swartzendruber
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