Co-digestion of fat, oil, grease (FOG) with municipal wastewater sludge for enhanced biogas production in Okanagan Valley

脂肪、油、油脂 (FOG) 与城市废水污泥共同消化，以提高奥肯那根山谷的沼气产量

• 批准号: 520824-2017
• 负责人: Eskicioglu, Cigdem
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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=640341
• 关键词: Co; digestion; fat; oil; grease

In recent years, fat, oil and grease (FOG) discharged from restaurants, commercial kitchens and food serviceproviders has become a major organic waste stream in the Okanagan. Historically, the primary method fordisposal of FOG collected from grease traps installed at the point of generation was to discharge directly intothe municipal wastewater treatment plants (WWTPs) or at landfills, however many waste treatment utilities aremoving forward with restricting FOG disposal due to negative impacts on operations (e.g. pipe/manholeblockages causing overflows). In some municipalities in the Okanagan, disposal options will soon be limited tohiring a certified waste hauler from the Metro Vancouver area to collect waste for transport to Vancouver foranaerobic co-digestion at Annacis Island WWTP. This will increase GHG emissions and impacts on roadinfrastructure for transport (around 800 km round trip). Anaerobic digester is a heated/mixed bioreactor whereorganic waste (substrate) is converted to renewable energy in the form of biogas.The main objective of this experimental research is to investigate the effect of FOG as a co-substrate invarious configurations of bench-scale anaerobic digesters utilizing wastewater sludge from WWTPs in theregion. The local wastewater utilities have been considering anaerobic digestion (as an alternative to currentcomposting process) for biogas generation and improved quality of biosolids for land application as fertilizer. Itis expected that addition of FOG to wastewater treatment sludge would boost biogas production and increasecost efficiency. If laboratory scale results indicate a significant advantage over the current sludgetreatment/disposal scenario, the utilities will have the option to incorporate the use of FOG as a co-substrate inanaerobic digestion and will benefit from an increased biogas production allowing the use of a co-generationengine to significantly offset the WWTP's energy use. The project will also provide an environmentallysustainable method for FOG disposal and will train highly qualified personal in an important/desired field.

近年来，从餐馆、商业厨房和食品服务供应商排放的脂肪、油和油脂(雾)已成为奥卡纳根州的主要有机废物流。从历史上看，处理从产油点安装的隔油池收集的雾的主要方法是直接排放到市政污水处理厂(WWTP)或垃圾填埋场，然而，由于对运营的负面影响(例如，管道/沙井堵塞导致溢流)，许多废物处理设施正在推进限制雾处理。在奥卡纳根的一些城市，处置选择很快将仅限于从温哥华大都会地区雇用一名经认证的废物运输车，收集废物，运往温哥华，在安纳西斯岛污水处理厂进行厌氧共消化。这将增加温室气体排放和对道路交通基础设施的影响(往返约800公里)。厌氧消化池是一种将有机废物(底物)以沼气的形式转化为可再生能源的受热/混合生物反应器。本实验研究的主要目的是考察雾作为共基质对利用该地区污水处理厂废水污泥的小试规模厌氧消化池的影响。当地污水处理公司一直在考虑厌氧消化(作为当前堆肥过程的替代方法)来产生沼气，并改善生物固体的质量，供土地用作肥料。预计在污水处理污泥中添加雾可以提高沼气产量和成本效益。如果实验室规模的结果表明比目前的污泥处理/处置方案有显著的优势，公用事业公司将可以选择将雾气作为厌氧消化的共基质，并将受益于沼气产量的增加，从而使用热电联产发动机显著抵消污水处理厂的能源消耗。该项目还将提供一种环境可持续的雾处理方法，并将在重要/期望的领域培训高素质的人员。