Effect of alkaline pretreatment on emerging substances of concern (ESoC) in biosolids**

碱预处理对生物固体中新出现的关注物质 (ESoC) 的影响**

• 批准号: 533799-2018
• 负责人: Ray, Madhumita
• 金额: $ 1.82万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=663060
• 关键词: Effect; alkaline; pretreatment; emerging; substances

Wastewater is the largest source of effluent discharge to Canadian water resources, leaving behind residual solids which require further treatment to protect public health and the environment. Management of wastewater solids, sludge or biosolids (further treated sludge), is a major economic factor in the operation of wastewater treatment plants; ~50% of the annual operating costs are related to sludge management alone. Any reduction in volume of the sludge and greater stabilization reduce the burden on the ultimate management cost. Anaerobic digestion (AD), one of the most widely used sludge stabilization processes worldwide, utilizes anaerobic bacteria to break down about 40-50% of the sludge's organic matter to produce valuable biogas (methane) for energy and reduce pathogens of the sludge prior to a beneficial use. A superior and stabilized biosolids material can be utilized as an agricultural fertilizer, which has a positive effect on nutrient recycling and organic material reconstitution in the soil. The biodegradability of sludge solids, the enhancement of dewatering of the sludge, and destruction of pathogen can be improved by the chemical or biological pretreatment of sludge. The partnering company, Lystek International Inc. has a low-temperature thermal alkaline hydrolysis (THP) technology for treatment of biosolids and other organics. The process achieves cell and macromolecular hydrolysis through the addition of heat (75oC), alkali (KOH or other alkali sources to pH >9.5) and high-speed shearing. This process produces a CFIA-registered fertilizer that is sold to farmers for use on agricultural land. However, potential presence of trace concentrations of numerous organic compounds in biosolids is a global concern. These compounds are commonly referred to collectively as emerging substances of concern (ESoC) which include pharmaceuticals and active ingredients in personal care products in the raw sludge or treated biosolids. The objective of the proposed work is to determine the fate of ESoCs in biosolids when processed using the Lystek THP system. Specifically, this research aims to determine how the Lystek process, either alone, or coupled with anaerobic digestion, impacts the fate of five specific ESoCs. **

废水是加拿大水资源的最大废水排放源，留下的残留固体需要进一步处理以保护公众健康和环境。废水固体、污泥或生物固体（进一步处理的污泥）的管理是废水处理厂运营中的一个主要经济因素；约 50% 的年度运营成本仅与污泥管理相关。污泥体积的减少和稳定性的提高都会减轻最终管理成本的负担。厌氧消化 (AD) 是全球使用最广泛的污泥稳定工艺之一，利用厌氧细菌分解约 40-50% 的污泥有机物，产生有价值的沼气（甲烷）作为能源，并在污泥得到有益利用之前减少污泥的病原体。优质且稳定的生物固体材料可用作农业肥料，对土壤中的养分循环和有机物质重建具有积极作用。通过对污泥进行化学或生物预处理，可以提高污泥固体的可生物降解性、增强污泥的脱水性和杀灭病原菌。合作伙伴 Lystek International Inc. 拥有用于处理生物固体和其他有机物的低温热碱解 (THP) 技术。该过程通过加热（75℃）、碱（KOH或其他碱源至pH>9.5）和高速剪切来实现细胞和大分子的水解。该过程生产出经 CFIA 注册的肥料，出售给农民用于农田。然而，生物固体中可能存在痕量浓度的多种有机化合物是全球关注的问题。这些化合物通常统称为新兴关注物质 (ESoC)，其中包括原污泥或处理后的生物固体中的个人护理产品中的药物和活性成分。拟议工作的目标是确定使用 Lystek THP 系统处理时生物固体中 ESoC 的命运。具体来说，这项研究旨在确定 Lystek 工艺（无论是单独使用还是与厌氧消化相结合）如何影响五个特定 ESoC 的命运。 **