Vacuum pump for lab scale bioventing

用于实验室规模生物通气的真空泵

• 批准号: 358806-2008
• 负责人: Zytner, Richard
• 金额: $ 0.52万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=361345
• 关键词: Vacuum; pump; lab; scale; bioventing

Approximately 25% of all underground storage tank systems are known to be leaking gasoline into the environment. Bioventing is a good way to remediate soil contaminated by gasoline, including Brownfields, which typically have some form of petroleum hydrocarbon contamination.  Bioventing is the process through which nutrient and water are added to the soil to stimulate the native microbial population to degrade the contaminant. The challenge is that tests need to be done on every soil to see if the process can or should be applied to a particular site.  Therefore, a variety of biodegradation studies will be completed to determine a universal degradation expression to transfer the results from one site to another and to evaluate scale-up factors.  This will be done using three scales, micro (200g), meso (4 kg) and macro (100 kg).  The larger reactors will allow soil heterogeneity to be incorporated.  Factors to be considered in the various tests including aging of the contamination, oxygen consumption, amount of microbial growth, water content, pH, impact on soil type (permeability).Completion of the research requires a durable vacuum pump to simulate bioventing conditions in the lab, where the drawn in air provides the oxygen necessary to stimulate aerobic bacteria.  The pump requested can provide the desired flow for the meso and macro scale tests in a lubricant free environment.  In addition, it is explosion proof and has a very low decibel rating.  Both factors are important safety considerations when working in a laboratory setting. This equipment is essential to complete the proposed work on correlation evaluation and scale-up factors for transferring the lab results to the field.

据了解，大约25%的地下储油罐系统正在将汽油泄漏到环境中。生物通风是修复被汽油污染的土壤的好方法，包括棕地，它通常有某种形式的石油烃污染。生物通风是将养分和水添加到土壤中以刺激本地微生物种群降解污染物的过程。挑战在于，需要在每个土壤上进行测试，以确定该过程是否可以或应该应用于特定的地点。因此，将完成各种生物降解研究，以确定通用的降解表达式，将结果从一个地点转移到另一个地点，并评估放大因素。这将使用三个尺度，即微观(200克)、中观(4公斤)和宏观(100公斤)。较大的反应器将允许土壤异质性被纳入。在各种测试中需要考虑的因素包括污染物的老化、耗氧量、微生物生长量、水分、pH、对土壤类型(渗透性)的影响。完成这项研究需要一个耐用的真空泵来模拟实验室的生物通风条件，在那里吸入的空气提供刺激好氧细菌所需的氧气。所要求的真空泵可以在无润滑剂的环境中为中观和宏观测试提供所需的流量。此外，它是防爆的，具有非常低的分贝额定值。这两个因素都是在实验室环境中工作时重要的安全考虑因素。该设备对于完成将实验室结果转移到实地的相关评价和放大系数的拟议工作至关重要。