The IntensiCarb Digester: An Innovative Anaerobic Digestion Technology for Process Intensification and Resource Recovery from Municipal Wastewater Biosolids

IntensiCarb 消化器：一种创新的厌氧消化技术，用于城市废水生物固体的工艺强化和资源回收

• 批准号: 561772-2021
• 负责人: Nakhla, GeorgeGF
• 金额: $ 7.92万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 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=746674
• 关键词: IntensiCarb; Digester; Innovative; Anaerobic; Digestion

The challenges facing the water and wastewater industry include aging infrastructure, land constraints, energy demands, and financial limitations. Furthermore, there is a strong paradigm shift towards resource and energy recovery from wastewater contaminants. The aforementioned challenges could only be overcome by developing intensified treatment processes - processes that achieve the desired treatment objectives in reduced time and/or space and/or with less energy requirement. Wastewater treatment generates biosolids, the processing of which through thickening, stabilization, and dewatering accounts for over 50% of the total treatment costs. One of the most widely used biosolids stabilization is anaerobic digestion, which is operated at 37oC and atmospheric pressure generates methane energy and liquid streams that are rich in volatile fatty acids (that are beneficial for enhanced biological nitrogen and phosphorous removal from municipal wastewaters), and ammonia which can be used for fertilizers. This project aims to develop a disruptive anaerobic digestion technology, the IntensiCarb Digester (ID) that not only integrates the three aforementioned biosolids processes in one but also facilitates separate recovery of bioenergy, VFA, and ammonia. The operational conditions of the ID such as the vacuum pressure, duration, application mode (continuous/intermittent), hydraulic and solids retention times (HRT, SRT) will be optimized for resource recovery from various wastewater biosolids i.e. primary and thickened waste activated sludge. The study will also develop both a biological process model for the ID and a hydrodynamic model to enable scale-up of the optimized technology and minimize its energy consumption. The conceptual process design for a full-scale system at the municipal partner facilities will be completed and a comprehensive economic study will be conducted. The economic study will benchmark the ID against commercial current state-of-the-art technologies, identify market niches with respect to both new greenfield applications and retrofits, and potential end users for full-scale implementation.

水和废水行业面临的挑战包括老化的基础设施，土地限制，能源需求和财务限制。此外，从废水污染物中朝着资源和能源回收的范围有很大的范式转变。上述挑战只能通过开发加强的治疗过程来克服 - 在减少时间和/或空间和/或能量需求较少的情况下实现所需的治疗目标的过程。废水处理会产生生物固体，通过增厚，稳定和脱水的加工占总治疗成本的50％以上。使用最广泛的生物固体稳定性之一是厌氧消化，在37oC和大气压下运行，产生富含挥发性脂肪酸的甲烷能量和液体流（有益于增强生物氮和磷酸化的磷酸化，可用于从市政废物中使用），以及用于使用CANCERSERSERSERSERSERSERSERSERSERSERSERSERSERSERILIZERSERILIZERILIZERIZERIZERIZERIZERS的甲烷脂肪酸。该项目旨在开发一种破坏性的厌氧消化技术，即IntensiCarb消化器（ID），不仅将上述三个生物固体过程整合在一起，而且还可以促进生物能源，VFA和Ammonia的单独恢复。 ID的操作条件，例如真空压力，持续时间，应用模式（连续/间歇性），液压和固体保留时间（HRT，SRT），以从各种废水生物固体中的资源回收（即初级和浓厚的废物活性污泥中）进行优化。该研究还将开发ID的生物过程模型，也将开发一个流体动力模型，以实现优化技术的扩展并最大程度地减少其能耗。 市政合作伙伴设施的全尺度系统的概念过程设计将完成，并将进行全面的经济研究。这项经济研究将基准针对商业当前最新技术的ID，确定有关新的Greenfield应用程序和改造的市场壁ni，以及用于全面实施的潜在最终用户。