Temperature phased anaerobic digestion with side-stream archaea enrichment for Lulu Island wastewater treatment plant digester upgrade

露露岛污水处理厂消化池升级的温度分阶段厌氧消化和侧流古菌富集

• 批准号: 530065-2018
• 负责人: Eskicioglu, Cigdem
• 金额: $ 11.83万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697655
• 关键词: Temperature; phased; anaerobic; digestion; side

Waste sludge processing at wastewater treatment plants (WWTPs) represents one of the major challenges, often costing more than the treatment and discharge of the liquid stream. Among several waste sludge treatment options, anaerobic digestion (AD) has proven to be an effective technology. AD is essentially a bioreactor that induces microorganisms to form volatile fatty acids and methane, supplied through the introduction of organic matter such as sewage sludge or manure. In addition to generating methane (which can be converted to heat/electricity), the other benefits of AD are the diversion of organic waste from landfills, reduction of solids, pathogens, production of organic fertilizer as well as reduction of GHG emissions. Lulu Island WWTP (Richmond, BC) has been operating two single-stage AD in parallel. Although the process achieves 63% solids reduction, the current configuration does not provide process redundancy when one of the digesters needs to be shut down for maintenance/repair. Moreover, the dewatered digestate qualifies as Class B biosolids with restrictions for land application. For reducing operational risks and intensifying resource recovery, Metro Vancouver is interested in developing next generation AD technologies at their WWTPs. In this project, a dual-stage AD tandem with a side-stream bioaugmentor is proposed as an advanced AD option for increasing solids reduction, upgrading biogas methane composition from the typical 60% to 90% or higher, enhancing digestate dewaterability, and upgrading biosolids from Class B to Class A. The project will also include microbial profiling combined with select multi-omic (DNA and RNA) analyses to gain insight to community structure, activity and function in both conventional and advanced AD configurations. Metro Vancouver has budgeted $1M to integrate and operationalize a pilot-scale AD at Lulu Island Water Resource Recovery Facility and $13M for a plant upgrade to feed biogas into the power grid. Lab-scale results obtained from this project will provide clear direction for the pilot-plant design/built/operation, which will enable the evaluation of advanced AD processes "offline" without risking ongoing operations.

废水处理厂（WWTPS）的废物污泥加工代表了主要挑战之一，通常比液体流的处理和排放更高。在几种废物污泥处理方案中，厌氧消化（AD）已被证明是一项有效的技术。 AD本质上是一种生物反应器，可诱导微生物形成挥发性脂肪酸和甲烷，通过引入有机物（例如污水污泥或肥料）提供。除了产生甲烷（可以转化为热/电能）外，AD的其他好处是有机废物从垃圾填埋场中转移，固体减少，病原体，有机肥料的产生以及减少温室气体排放。 Lulu Island WWTP（不列颠哥伦比亚省的里士满）并行运营两个单级广告。尽管该过程可实现63％的固体减少，但是当需要关闭其中一个消化体以进行维护/维修时，当前的配置无法提供过程冗余。此外，脱水的消化物可以作为B级生物固体和土地应用限制。为了降低运营风险并加强资源恢复，大温哥华有兴趣在其WWTPS上开发下一代广告技术。在这个项目中，提出了与侧流生物演奏者的双阶段AD串联，作为提高固体减少固体的高级AD选项，从典型的60％升级到典型的60％或更高的60％或更高的含量，将消化率降低性降低和升级为B类。为了了解传统和高级广告配置中的社区结构，活动和功能。温哥华大都会已经预算了100万美元，以在卢卢岛水资源回收设施中整合和运营一份试点广告，并为工厂升级提供1300万美元，以将沼气喂入电网。从该项目获得的实验室尺度结果将为飞行植物设计/建造/操作提供明确的方向，这将使高级广告流程“离线”评估，而无需冒险进行持续的操作。