An evaluation of membrane aerated biofilm reactor technology in anabling shortcut nitrogen removal

膜曝气生物膜反应器技术实现捷径脱氮的评价

• 批准号: 516524-2017
• 负责人: Dagnew, Martha
• 金额: $ 4.88万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618198
• 关键词: evaluation; membrane; aerated; biofilm; reactor

Carbon, nitrogen and phosphorus are the primary stressors that pollute lakes, drinking water wells, streams and wetlands. Most stressors come from human activities and through municipal and home sewage systems. Thus, wastewater treatment plants (WWTPs) are required to remove carbon and nutrients prior to their discharge to water bodies. Typically, WWTPs employ conventional activated sludge process for the treatment of domestic wastewater. This process involves using microorganisms for removing organic matter and nutrients and requires addition of oxygen to get it done. The process consumes a substantial amount of electrical energy from fossil fuels to drive the conversion. The process also generates a great amount of sludge and greenhouse gases, such as carbon dioxide and nitrous oxide gases during various biological conversions of organic and nitrogenous matters present in domestic wastewater. The goal of this project is to develop membrane reactor biofilm reactor enabled shortcut nitrogen removal process. The technology makes use of gas transfer membrane to selectively transfer oxygen to the biological process by diffusion. The technology has been developed for wastewater application. Early technology development focused for total nitrogen removal through conventional nitrification-denitrification processes. This proposal evaluates a new process that makes the use of the technology to enable nitrogen removal at significantly higher intensity and lower energy input/ The research integrates innovative processes and technologies and a simulation platform. Results from this research will contribute towards clean technology development for wastewater.

碳、氮和磷是污染湖泊、饮用水威尔斯、溪流和湿地的主要压力源。大多数压力源来自人类活动以及市政和家庭污水系统。因此，废水处理厂（WWTPs）需要在排放到水体之前去除碳和营养物。通常，WWTP采用传统的活性污泥法来处理生活废水。这个过程涉及使用微生物去除有机物和营养物质，并需要添加氧气才能完成。该过程消耗来自化石燃料的大量电能来驱动转换。该工艺还在生活废水中存在的有机物和含氮物质的各种生物转化过程中产生大量污泥和温室气体，例如二氧化碳和一氧化二氮气体。本项目的目标是开发膜反应器生物膜反应器实现的短程脱氮工艺。该技术利用气体转移膜通过扩散选择性地将氧气转移到生物过程中。该技术已开发用于废水应用。早期的技术开发集中在通过常规硝化-反硝化工艺去除总氮。该提案评估了一种新工艺，该工艺利用该技术以显著更高的强度和更低的能量输入实现脱氮/该研究集成了创新工艺和技术以及模拟平台。这项研究的结果将有助于废水清洁技术的发展。