Treatment of Industrial Wastewater

工业废水处理

• 批准号: RGPIN-2019-04426
• 负责人: Biswas, Nihar
• 金额: $ 3.79万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749025
• 关键词: Treatment; Industrial; Wastewater

Contamination of fresh water is one of the most concerning environmental issues. Normally, the main sources of pollution have been organic matter and nutrients. However, chemicals like pharmaceuticals, hormones and personal care products (PPCPs) are finding their way into the receiving waters. The main sources of this pollution have been industrial and municipal wastewater treatment plant effluents. Most conventional treatment plants cannot remove PPCPs efficiently. These putative contaminants, entering the environment as wastewater treatment plant effluents, are known as "contaminants of emerging concern" or simply "emerging contaminants" (ECs). Pharmaceuticals such as acetaminophen, heteroaromatics such as benzothiazoles, and agrochemicals such as halogenated benzonitriles have wide application in commercial and industrial products and have been detected in industrial and domestic wastewater along with other organic contaminants such as azo-dyes, and have also been detected in soil, groundwater, and tap water. Commonly used wastewater treatment techniques are unable to effectively remove these toxic compounds and applying some of the advanced treatment technologies can exasperate the issue through the formation of more toxic byproducts during treatment. Although some of these contaminants have been linked to cancer or have shown endocrine-disrupting properties, their long-term effects on human and ecosystem health are largely unknown. Removal of these chemicals during industrial and domestic wastewater treatment, therefore, is of great importance. This research aims to effectively remove these recalcitrant compounds using enzymatic treatment, by which the compounds are converted to insoluble or less water-soluble oligomers. The insoluble oligomers are then separated from the solution by settling, with or without other unit operations such as coagulation/flocculation assisting in settling. Our goal is to assess the effect of different parameters on enzymatic treatment efficiency of these ECs in synthetic and real wastewater, both industrial and domestic. The key parameters to be investigated for their effects on abatement efficiency are pH, enzyme and peroxide concentrations, and the reaction time. Also, by identifying the treatment byproducts - both in solution as well as in the precipitates, evaluating its possible toxicity, we will propose a possible degradation pathway for these chemicals. Biocompatibility of treated wastewater will be determined by assessing the ecotoxicity of transformation products, and effluents. This research will broaden our knowledge on the fate and impact of widespread bio-refractory contaminants such as ECs and help in developing more viable and promising techniques for the treatment of hazardous pollutants, with the long-term goal is of developing full-scale cost-effective treatment systems.

淡水污染是最令人关注的环境问题之一。通常，污染的主要来源是有机物和营养。但是，诸如药品，激素和个人护理产品（PPCP）之类的化学物质正在进入接收水域。这种污染的主要来源是工业和市政废水处理厂废水。大多数常规的治疗厂无法有效删除PPCP。这些推定的污染物作为废水处理厂废水进入环境，被称为“新兴关注的污染物”或简单地“新兴污染物”（ECS）。诸如对乙酰氨基酚，苯并噻唑之类的异性植物和农业化学物质（例如卤代苯硝基苯甲酸酯）等药物在商业和工业产品中广泛应用，并且在工业和家庭废水中已检测到，以及其他有机污染物，以及其他有机污染物，例如Azo-dyes，以及在Azo-dyes中，也已被发现。常用的废水处理技术无法有效去除这些有毒化合物，并且应用一些先进的治疗技术可能会通过在治疗过程中形成更多有毒的副产品来激怒该问题。尽管其中一些污染物与癌症有关或显示出内分泌干扰的特性，但它们对人类和生态系统健康的长期影响在很大程度上尚不清楚。 因此，在工业和家庭废水处理期间去除这些化学物质非常重要。这项研究旨在使用酶促处理有效去除这些顽固化合物，通过该化合物将化合物转化为不溶性或更少的水溶性低聚物。然后通过沉降，或没有其他单位操作（例如凝结/絮凝有助于沉降）将不溶性的低聚物从溶液中分离出来。我们的目标是评估不同参数对这些EC在工业和国内的合成和真实废水中这些EC酶促治疗效率的影响。要研究其对减排效率的影响的关键参数是pH，酶和过氧化物浓度以及反应时间。同样，通过鉴定溶液和沉淀中的处理副产物，评估其可能的毒性，我们将提出这些化学物质的可能降解途径。处理的废水的生物相容性将通过评估转化产物和废水的生态毒性来确定。这项研究将扩大我们对广泛生物难治性污染物（例如ECS）的命运和影响的知识，并有助于开发更可行，有希望的技术来治疗有害污染物，其长期目标是开发全尺度成本有效的治疗系统。