Bioventing Scale-up Factor

生物通气放大系数

• 批准号: RGPIN-2014-04909
• 负责人: Zytner, Richard
• 金额: $ 1.46万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636647
• 关键词: Bioventing; Scale; up; Factor

Properties contaminated with petroleum hydrocarbons continue to get the attention of society and government agencies. One reason is the need to remediate these contaminated sites in order to mitigate possible adverse health issues. The other reason is the major cost liability to remediate all these sites, which globally ranges from US $12-$35 billion. Bioventing has the potential to be a cost effective remediation technology, provided the optimum nutrients and water are added to the soil to stimulate the native microbial population to degrade the petroleum hydrocarbons. Unfortunately, many of the laboratory studies completed to assess if biodegradation is feasible and to determine the associated degradation rate have been done with less than 500 g of soil. Furthermore, many of these studies are done on laboratory contaminated soil and not aged contamination from actual field sites, making it difficult to transfer the findings to the field site. Accordingly, biodegradation studies will be done using 100 kg reactors to obtain degradation rates and evaluate the scale-up factor. Parameters to be studied include aging of the contamination, oxygen consumption, amount of microbial growth, water content, pH and impact of soil properties. Soil heterogeneity is an important component and will be incorporated. The degradation rates obtained from the larger scale experiments will be used to refine the overall degradation correlation previously determined and compared with previously completed 4 kg studies to further develop the scale-up factor. The overall goal is to identify the important site characteristics needed in lab studies to establish the scale-up factor so that bioventing performance in the field can be better estimated. Doing so will provide a cost effective means of restoring petroleum contaminated sites in Canada and the world, providing many jobs. Work will also continue on converting an existing 3D SVE model to a bioventing model that will incorporate the developed degradation model and the scale-up factor. This model will give consultants a tool by which they can predict effectiveness of bioventing for a given site and estimate the time needed to attain closure, a question site owners and government officials continue to ask. The end result being, improved bioventing technology that will contribute to sustainability and create job opportunities.

受石油碳氢化合物污染的财产继续受到社会和政府机构的关注。原因之一是需要修复这些受污染的场地，以减轻可能的不利健康问题。另一个原因是修复所有这些场地的主要成本责任，全球范围为 12 至 350 亿美元。生物通风有潜力成为一种具有成本效益的修复技术，前提是向土壤中添加最佳的养分和水，以刺激本地微生物种群降解石油碳氢化合物。不幸的是，许多为评估生物降解是否可行并确定相关降解率而完成的实验室研究都是在不到 500 克的土壤上完成的。此外，许多研究都是在实验室污染的土壤上进行的，而不是实际现场的老化污染，因此很难将研究结果转移到现场。因此，生物降解研究将使用 100 kg 反应器进行，以获得降解率并评估放大系数。要研究的参数包括污染物老化、耗氧量、微生物生长量、含水量、pH 值和土壤性质的影响。土壤异质性是一个重要组成部分，将被纳入其中。从更大规模的实验中获得的降解率将用于完善先前确定的总体降解相关性，并与先前完成的 4 kg 研究进​​行比较，以进一步开发放大系数。总体目标是确定实验室研究所需的重要场地特征，以确定放大系数，以便更好地估计现场的生物通风性能。这样做将为恢复加拿大和世界各地的石油污染场地提供一种具有成本效益的方法，并提供许多就业机会。还将继续将现有的 3D SVE 模型转换为生物通风模型，该模型将结合开发的降解模型和放大因子。该模型将为顾问提供一个工具，通过该工具，他们可以预测给定站点生物通风的有效性，并估计实现关闭所需的时间，这是站点所有者和政府官员不断提出的问题。最终结果是改进的生物通风技术将有助于可持续发展并创造就业机会。