Enhanced biogas production and high-end valorization of digestate from anaerobic digestion of organic residuals

提高沼气产量并实现有机残渣厌氧消化消化物的高端增值

• 批准号: 531209-2018
• 负责人: Brar, SatinderKaur
• 金额: $ 7.33万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719687
• 关键词: Enhanced; biogas; production; end; valorization

According to Quebec Province's Climate Change Action Plan 2013-2020, all the organic residuals must be diverted from landfills and valorized. Hence, anaerobic digestion of the organic residuals has been adopted as one of the sustainable strategies to do so. The key organic residuals comprise municipal sludge and source-sorted organic waste (SSOW). Currently, the municipal sludge in Quebec City is handled by incineration and landfilling. Likewise, the SSOW derived from the food and beverages of municipal and industrial, commercial and institutional sectors is composted. However, these management options do not lead to efficient resource recovery causing greenhouse gas emissions. Moreover, municipal sludge and/or SSOW are a complex lignocellulosic matrix and it is difficult to use it directly for the anaerobic digestion. The anaerobic digestion entails soluble organic matter for efficient digestion to produce safe digestate and high biogas yield. To increase the solubility of sludge solids, pre-treatment techniques, such as ultrasonication, enzymatic treatment, addition of biochar and novel biochar enzyme microsystems and co-digestion with SSOW are proposed in this project. These pre-treatments can increase the solubility and/or decrease the inhibitors of the sludge/SSOW which can enhance the anaerobic digestion with corresponding increase in biogas yield. Further, addition of growth promoting microorganisms and biocontrol agents in a suitable proportion to the digestate might help the phosphorus, nitrogen and other nutrients fixation by plants and protection against agricultural pests, which can increase the market value of the digestate by 5-10 folds and can reduce the use of chemical fertilizers. Overall, use of anaerobic digestion technology is a sustainable method for reducing greenhouse gas emissions, odor, nutrient imbalance and carbon recycling making a clean, green, secure and sustainable environment for Canadians, strengthening the resilience to climate change. Further, the HQP will be trained in different disciplines of applied microbiology, wastewater engineering, environmental engineering, biochemical engineering and biochemistry.

根据魁北克省2013-2020年气候变化行动计划，所有的有机残留物必须从垃圾填埋场转移出来，并进行价格调整。因此，有机残留物的厌氧消化已被采用作为这样做的可持续策略之一。主要的有机残留物包括城市污泥和源头分类的有机废物（SSOW）。目前，魁北克市的城市污泥处理是通过焚烧和填埋。 同样，来自市政和工业、商业和机构部门的食品和饮料的SSOW也被堆肥。 然而，这些管理办法并没有导致有效的资源回收，造成温室气体排放。此外，城市污泥和/或SSOW是复杂的木质纤维素基质，并且难以将其直接用于厌氧消化。厌氧消化需要可溶性有机物进行有效消化，以产生安全的厌氧状态和高的沼气产量。为了提高污泥固体的溶解性，本项目提出了预处理技术，如超声处理、酶处理、添加生物炭和新型生物炭酶微系统以及与SSOW共消化。这些预处理可以增加溶解度和/或减少污泥/SSOW的抑制剂，这可以增强厌氧消化，同时相应地增加生物气产量。此外，以适当比例添加促进生长的微生物和生物控制剂到植物中可以帮助植物固定磷、氮和其他营养素并防止农业害虫，这可以使植物的市场价值增加5-10倍，并且可以减少化学肥料的使用。总的来说，厌氧消化技术的使用是一种可持续的方法，可以减少温室气体排放，气味，营养失衡和碳循环，为加拿大人创造一个清洁，绿色，安全和可持续的环境，加强对气候变化的适应能力。此外，HQP将接受应用微生物学、废水工程、环境工程、生物化学工程和生物化学等不同学科的培训。