氧和二氧化碳对空化条件下细菌和酵母净化水的影响

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The results of the morphological characteristics of bacteria and yeast, as well as images of cells according to the results of microscopic studies at a corresponding magnification characteristic of a particular microorganisms types are presented. Degrees of microorganisms destruction, expressed in a percentage, were calculated. According to the results of studies, Bacillus cereus bacteria type were more likely to be destroyed, compared with Saccharomyces cerevisiae yeast type at the conditions of simultaneous action of gas and cavitation. The resistance of yeast cells is explained by the result of the specific effect of cavitation on the yeast cell wall and their inter-genetic difference in cell wall structures. Higher efficiency of oxygen in the processes of cavitation treatment of both bacteria and yeast, compared to the action of carbon dioxide is shown experimentally. Conclusions. More active destruction of bacterial cells compared to yeast in the gas/cavitation conditions shown that is explained by the age-related signs of the bacteria. It has been investigated that oxygen under cavitation conditions is described by a larger value of the microorganisms destruction, that is explained by the nature of the gas action at the experimental conditions. 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引用次数: 4

摘要

目的:研究空化条件下不同气体性质(氧气和二氧化碳)气氛下含蜡样芽孢杆菌菌型和沙酵母菌型污染水体的净化工艺;评价和比较细菌与酵母细胞的破坏效率,并确定在水系统空化处理过程中的有效气体性质。所研究的模型介质由频率为22 kHz,功率为35瓦的超声波发生器(UZDN-2T)发出。Оxygen和二氧化碳是气泡,作为空化的附加胚胎。通过计数在培养皿中培养的菌落,并在菌落形成单位(CFU)中表达,确定超声前后的微生物数量。提出了细菌和酵母的形态学特征的结果,以及根据特定微生物类型的相应放大特征的显微镜研究结果的细胞图像。计算了以百分比表示的微生物破坏程度。研究结果表明,在气体和空化同时作用的条件下,蜡样芽孢杆菌菌型比酿酒酵母菌型更容易被破坏。酵母细胞的抗性可以用空化对酵母细胞壁的特殊作用和它们在细胞壁结构上的遗传差异来解释。实验表明,与二氧化碳的作用相比,氧气在细菌和酵母的空化处理过程中的效率更高。在气体/空化条件下,与酵母相比,细菌细胞的破坏更活跃,这可以用细菌与年龄相关的迹象来解释。研究表明,在空化条件下,氧气对微生物的破坏值较大,这可以用实验条件下气体作用的性质来解释。结果表明,微生物净化水的效率取决于空化条件下气泡的性质。
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Influence of Oxygen and Carbon Dioxide on Water Purification from Bacteria and Yeast Under Cavitation Conditions
Purpose is to study the purification process of water polluted by containing Bacillus cereus bacteria type and Saccharomyces сerevisiae yeast type under cavitation conditions and atmosphere of different gases nature (oxygen and carbon dioxide); to evaluate and to compare the destruction efficiency of bacterial with yeast cells, and to determine the effective gas nature during cavitation treatment of the aqueous system. Methods. The investigated model media were sounded by the action of an ultrasonic generator (UZDN-2T) with a frequency of 22 kHz, with a power of 35 watts. Оxygen and carbon dioxide were gas bubbles as an additional embryos of cavitation. Microorganisms number before and after sonication was determined by counting of the colonies grown on the nutrient medium in a Petri dish and expressed in colony-forming units (CFU). Results. The results of the morphological characteristics of bacteria and yeast, as well as images of cells according to the results of microscopic studies at a corresponding magnification characteristic of a particular microorganisms types are presented. Degrees of microorganisms destruction, expressed in a percentage, were calculated. According to the results of studies, Bacillus cereus bacteria type were more likely to be destroyed, compared with Saccharomyces cerevisiae yeast type at the conditions of simultaneous action of gas and cavitation. The resistance of yeast cells is explained by the result of the specific effect of cavitation on the yeast cell wall and their inter-genetic difference in cell wall structures. Higher efficiency of oxygen in the processes of cavitation treatment of both bacteria and yeast, compared to the action of carbon dioxide is shown experimentally. Conclusions. More active destruction of bacterial cells compared to yeast in the gas/cavitation conditions shown that is explained by the age-related signs of the bacteria. It has been investigated that oxygen under cavitation conditions is described by a larger value of the microorganisms destruction, that is explained by the nature of the gas action at the experimental conditions. It is shown that the efficiency of water purification from microorganisms depends on the nature of the gas bubbled under cavitation conditions.
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