Intensification of in-sewer treatment strategies for optimal wastewater quality management and nutrient control

强化下水道内处理策略，以实现最佳废水质量管理和营养物控制

• 批准号: 543399-2019
• 负责人: Elbeshbishy, Elsayed
• 金额: $ 3.02万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=688412
• 关键词: Intensification; sewer; treatment; strategies; optimal

Sewage collection systems have been built and operated mainly as sanitation and hydraulic infrastructure, i.e. to prevent flooding and to move wastewater out of cities in order to receive appropriate treatment. As such, the management focus has been mostly on hydraulic performance and the prevention of particle settling/odor development in pipes. Current research in collection systems extends beyond sewage conveyance into the biochemical reactions occurring in sewers with the possibility of reducing H2S production while simultaneously modifying the influent wastewater chemistry to reach new treatment goals, such as highereffluent quality and reduced operational costs of the wastewater treatment plant. Thus, the optimization of physico-chemical and bio-chemical processes occurring in a collection system will help in achieving optimal management and control of wastewater effluent quality (especially in terms of phosphorus and nitrogen concentrations) and sludge production. Given the diversity of site-specific conditions encounterable in various geographies, it is paramount to develop/validate tools such as advanced computational models to rapidly identify plant-specific optimum conditions and "design" an ideal influent using in-sewer treatment chemistries.This proposal aims to test new chemistries as in-sewer treatment strategies as well as developing/validating advanced modeling tools aimed to identify the optimal operational strategies to intensify and control the bio-chemical and physico-chemical processes occurring in the sewer collection system. The type of chemicals (hydrogen peroxide, ferric chloride, and nitrate), the dosing location, and the dosage rate as well as their effect on the biochemical reactions in the bulk and the biofilm with focus on H2S control, VFA production, and nutrient removal (P and N).

污水收集系统主要是作为卫生和水利基础设施建造和运行的，即防止洪水和将废水排出城市，以便得到适当的处理。因此，管理重点主要是水力性能和防止管道中的颗粒沉降/气味发展。目前在收集系统的研究延伸到污水输送到污水管中发生的生化反应的可能性，减少H2S的生产，同时修改流入的废水化学，以达到新的处理目标，如highereffluent质量和降低运营成本的废水处理厂。因此，在收集系统中发生的物理化学和生物化学过程的优化将有助于实现废水流出物质量（特别是在磷和氮浓度方面）和污泥产生的最佳管理和控制。鉴于不同地区可能遇到的特定地点条件的多样性，最重要的是开发/验证工具，如先进的计算模型，以快速确定工厂特定的最佳条件和“设计”一个理想的进水使用下水道处理化学品。本提案旨在测试新的化学品作为下水道处理策略，以及开发/验证先进的建模工具，旨在确定最佳的操作策略，以加强和控制污水收集系统中发生的生物化学和物理化学过程。化学品的类型（过氧化氢，氯化铁和硝酸盐），剂量的位置，和剂量率，以及它们对生物体和生物膜中的生化反应的影响，重点是H2S控制，VFA生产和营养物去除（P和N）。