Trench water treatment using membrane-based hybrid processes

水的供应和需求管理已成为加拿大自然资源可持续发展的关键。阿尔伯塔天然气厂的一个重要问题是污染物，可能来自火炬坑和废水池，这会对大面积的土壤和地下水造成严重影响。在这一领域的 ** 主要污染物包括环丁砜，二异丙醇胺，氯化物。环丁砜是 ** 一种天然气脱硫化合物，旨在从气流中去除H2S、CO2和其他杂质。**由于它是高度水溶性的，这种化合物可能会从加拿大西部一些酸性气体加工设施的溢出物和垃圾填埋场渗入地下水。因此，监管机构要求石油和天然气 ** 行业评估和补救遇到的任何影响。目前，有几种补救技术可用于处理环丁砜（例如，氧化和生物修复）。然而，由于环丁砜的反柠檬酸性质，当需要大量减少质量时，这些技术可能是无效的 ** 并且昂贵的（即，>100 ppm）。膜分离工艺由于其相对于传统工艺的独特优势，主要是较低的操作成本、紧凑的设计和高的产品质量，已经成为脱盐和水处理的最快新兴技术之一。在本项目中，将研究两种基于膜的混合工艺，即纳滤（NF）/反渗透（RO）和化学处理/RO，用于处理沟渠水的可行性。应用这种技术处理沟渠水，将促进地下水再循环，增加氧合以支持原位好氧生物降解，并将水返回水文循环。地下水 ** 再循环可以加快补救的速度，创造一个动态的流动状态，并增加质量去除。

The management of water supply and demand has become critical for the sustainable development of Canada's**natural resources. A significant concern in gas plant sites in Alberta is contaminants, likely sourced from a flare**pit and wastewater pond, which result in substantial soil and groundwater impacts over a large area. The**primary contaminants of concern in this area include sulfolane, diisopropanolamine, and chloride. Sulfolane is**a natural gas sweetening compound designed to remove H2S, CO2 and other impurities from the gas stream.**As it is highly water soluble, this compound can potentially leach into groundwater from spills and landfills at**some sour gas processing facilities in Western Canada. Hence, the regulator has requested that oil and gas**industries assess and remediate any impacts encountered.**Currently, there are a few remediation technologies available to address sulfolane (e.g., oxidation and**bio-remediation). However, due to the recalcitrant properties of sulfolane, these technologies can be ineffective**and expensive when large mass reduction is required (i.e., >100 ppm). Membrane separation processes have**become one of the fastest emerging technologies for desalination and water treatment due to their distinct**advantages over traditional processes, primarily lower operating costs, compact design, and high product**quality. In this project, the feasibility of two membrane-based hybrid processes, nanofiltration (NF)/reverse**osmosis (RO) and chemical treatment/RO, for the treatment of trench water will be investigated. Applying this**technology for the treatment of trench water, will promote groundwater recirculation, increase oxygenation to**support aerobic biodegradation in situ, and would return the water back into the hydrologic cycle. Groundwater**recirculation can increase the pace of remediation, creates a dynamic flow regime, and increases mass removal.