Integrated soil process modelling to support the management and bioremediation of petroleum hydrocarbon-contaminated soils in cold climates

寒冷气候下石油烃污染土壤的生物修复技术得到了广泛的探索。许多非原位生物修复研究表明，使用水溶性营养物供应和/或曝气的生物刺激可以增强本地冷适应碳氢化合物降解细菌的生物降解活性。这在北方地区已经成为一种常见的做法。然而，在寒冷地点的异地生物修复的成功在很大程度上依赖于季节性土壤热状况，特别是污染土壤中未冻水的可用性。了解土壤参数及其对土壤相变的影响对于规划、设计和管理寒冷气候下污染土壤的修复至关重要。利用未污染土壤数值模拟工具预测了季节性土壤冻融过程中土壤温度和未冻水含量的时空变化。然而，文献中的数值工具尚未得到石油污染土壤的广泛验证，特别是在生物修复过程中。SoilVision Systems是一家领先的工程软件开发商，为工程应用提供土壤热建模和其他建模软件。张博士最近的数值模拟研究强调了在石油污染土壤的生物修复中推进土壤热模型的潜力。因此，拟议研究的总体目标是开发新的基于知识的综合数值模拟工具，以支持寒冷气候下石油污染土壤的生物修复规划和管理，“综合土壤过程建模以支持寒冷气候下石油污染土壤的管理和生物修复”。SoilVision的热模型将使用现有的实验室和来自寒冷地区的现场生物修复数据进行验证，并与生物修复过程中专门用于季节性冻结和解冻污染土壤的微生物呼吸模型相结合。这种新方法将促进偏远寒冷地区石油污染土壤修复的规划、设计和管理。

Bioremediation technology for petroleum hydrocarbon-contaminated soils in cold climates has beenextensively explored. Numerous ex-situ bioremediation studies have suggested that biostimulation usingwater-soluble nutrient supplies and/or aeration can enhance the biodegradation activity of indigenouscold-adapted, hydrocarbon-degrading bacteria. This has become a common practice at northern sites. However,the success of ex-situ bioremediation at cold sites largely relies on seasonal soil thermal regimes, particularly interms of unfrozen water availability in contaminated soils. Understanding soil parameters and their effect onsoil phase changes is crucial for planning, designing, and managing the remediation of contaminated soils incold climates. Spatio-temporal changes in soil temperatures and unfrozen water content during seasonal soilfreeze/thaw are predictable using numerical soil modelling tools for uncontaminated soils. However, numericaltools in the literature have not been extensively validated for petroleum-contaminated soils, especially duringbioremediation. SoilVision Systems is a leading engineering software developer that provides soil thermalmodelling and other modelling software for engineering applications. Dr. Chang's recent numerical simulationstudy has highlighted the potential to advance soil thermal models for bioremediation inpetroleum-contaminated soils. The overarching goal of the proposed research, Integrated Soil ProcessModelling to Support the Management and Bioremediation of Petroleum Hydrocarbon-Contaminated Soils inCold Climates, is therefore to develop new integrated knowledge-based numerical modelling tools to supportbioremediation planning and management for petroleum-contaminated soils in cold climates. SoilVision'sthermal model will be validated using existing laboratory and field bioremediation data from a cold site, andintegrated with microbial respiration modelling specialized for seasonally freezing and thawing contaminatedsoils during bioremediation. This novel approach will advance the planning, design, and management ofremediation for petroleum-contaminated soils in remote cold regions.