Mitigation of cationic polymer toxicity in industrial waters

减轻工业用水中阳离子聚合物的毒性

• 批准号: 558346-2020
• 负责人: Goss, Greg
• 金额: $ 2.19万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=706750
• 关键词: Mitigation; cationic; polymer; toxicity; industrial

The release of water to the environment must meet specific environmental standards as set in industry operating permits (CCME, 1999). For many companies in land development, coagulation/flocculation treatment by cationic polymers is often used to remove suspended negatively charged (e.g., clays) particles (Total Suspended Solids; TSS). However, this potentially creates a secondary toxicity issue due to the presence of residual polymer, which is highly toxic to aquatic life. The overarching goal of this research project is to provide the necessary information to regulators required for approvals of an efficient, and cost-effective method for the amelioration of the toxicity of cationic polymer treated waters. The development of this process will benefit fisheries, environmental safety, and environmental compliance for industries that rely on cationic polymers to remove suspended sediments from wastewaters before discharge into natural environments. In collaboration with the industrial partner Clearflow group, we have developed a process to neutralize excess cationic polymers in water by the addition of a neutralizing agent. The amelioration of cationic polymer toxicity by the neutralizing agent is likely is affected by several factors, including the nature of the cationic polymers, the formulation of their polymer, and several parameters of water quality including pH, water hardness and humic acid, and dissolved organic carbon concentration. The goal is to devise a mathematically based model that can be used by industry to accurately predict the amelioration requirements for cationic contaminated municipal and industrial wastewaters before release. Inclusion of an amelioration process to eliminate cationic toxicity in industrial sites would prevent fish kills due to cationic polymer overdosing, thereby improving environmental compliance and raising the environmental profile of the companies/government bodies that dispose of their treated wastewater into natural, fish-bearing waters.

向环境排放的水必须符合工业经营许可证规定的具体环境标准（CCME，1999年）。对于土地开发中的许多公司来说，通过阳离子聚合物的凝聚/絮凝处理通常用于去除悬浮的带负电荷的（例如，粘土）颗粒（总悬浮固体; TSS）。然而，由于残留聚合物的存在，这可能产生二次毒性问题，残留聚合物对水生生物具有高度毒性。本研究项目的首要目标是为监管机构提供必要的信息，以批准一种有效且具有成本效益的方法，用于改善阳离子聚合物处理沃茨的毒性。该工艺的开发将有利于渔业、环境安全和依赖阳离子聚合物在排放到自然环境中之前从废水中去除悬浮沉积物的行业的环境合规性。我们与工业合作伙伴Clearflow集团合作，开发了一种通过添加中和剂来中和水中过量阳离子聚合物的工艺。中和剂对阳离子聚合物毒性的改善可能受几个因素的影响，包括阳离子聚合物的性质、它们的聚合物的配方和几个水质参数，包括pH、水硬度和腐殖酸，以及溶解的有机碳浓度。我们的目标是设计一个基于数学的模型，可用于工业，准确地预测阳离子污染的城市和工业废水释放前的改善要求。在工业场所中包括消除阳离子毒性的改良方法将防止由于阳离子聚合物过量而导致的鱼类死亡，从而改善环境合规性并提高将其处理的废水处置到天然的、含鱼的沃茨中的公司/政府机构的环境形象。