Optimization of an On-site Aerobic Digester for the Treatment of Commercial Organic Food Waste

有机垃圾约占加拿大生活垃圾的40%。来源分离有机物(SSO)如果不被转移和处理，最常见的是被丢弃在垃圾填埋场。餐厨垃圾具有高含水率和高可生物降解性有机化合物。如果储存时间过长或处理不当，这些食物垃圾的分解可能会产生有害的渗滤液、难闻的气味、招致害虫和有毒气体排放。就地处理有机食物垃圾的一种替代方法是使用好氧消化器。ORCA(有机垃圾转化替代品)是一种好氧消化器，通过使用天然微生物溶液，在24小时内将有机食物垃圾转化为营养丰富的废水。由于ORCA不能显著降低脂肪、油和油脂(FOG)，其处理能力有限，在排放到下水道系统之前需要连接到隔油器。这一应用研究项目将在ORCA消化池中添加YDRO系列微生物®(YDRO-MS)，这是一种细菌培养的鸡尾酒，以改善其性能，减少由此产生的脂肪、油和油脂(雾)的数量，进而降低其运营成本。将YDRO-MS与ORCA技术相结合以前从未尝试过。该项目将确定需要对ORCA消化池进行哪些修改，以允许YDRO-MS细菌的整合。这些结果将使ORCA的表现能够处理有问题的食物垃圾，特别是FOG，安大略省和加拿大对FOG有巨大的需求。

Organic waste makes up about 40% of the residential waste in Canada. Source-separated organics (SSO), if not diverted and treated, are most commonly disposed of in landfills. Food waste has a high moisture content and high biodegradable organic compounds. When stored too long or not properly handled the decomposition of these food wastes can result in the generation of harmful leachate, unpleasant odours, vermin attraction and toxic gas emissions. One alternative for onsite processing of organic food waste is the use of an aerobic digester. The ORCA (Organic Refuse Conversion Alternative) is an aerobic digester that converts organic food waste into a nutrient-rich wastewater within 24-hous by using a natural microorganism solution. Due to its inability to significantly reduce fats, oils and grease (FOGs) the ORCA is limited in its treatment ability and required connection to a grease trap prior to discharging into the sewer system. This applied research project will dose the ORCA digester with the YDRO Series Microorganisms® (YDRO-MS), a cocktail of bacterial cultures, to improve its performance, reduce the amount of fats, oils and grease (FOG) generated from it, and in turn reduce its operating costs. Incorporating the YDRO-MS with ORCA technology has never been attempted before. This project will determine what modifications are needed to the ORCA digester in order to allow for the integration of the YDRO-MS bacteria. These results will allow the ORCA's performance to treat problematic food waste, particularly FOGs, for which there is a tremendous need in Ontario and Canada.