关于活性污泥和厨余垃圾共消化的新见解：沼气与生物肥料。
New insights into co-digestion of activated sludge and food waste: Biogas versus biofertilizer.
机构信息
Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore.
Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
出版信息
Bioresour Technol. 2017 Oct;241:448-453. doi: 10.1016/j.biortech.2017.05.154. Epub 2017 May 29.
This study explored two holistic approaches for co-digestion of activated sludge and food waste. In Approach 1, mixed activated sludge and food waste were first hydrolyzed with fungal mash, and produced hydrolysate without separation was directly subject to anaerobic digestion. In Approach 2, solid generated after hydrolysis of food waste by fungal mash was directly converted to biofertilizer, while separated liquid with high soluble COD concentration was further co-digested with activated sludge for biomethane production. Although the potential energy produced from Approach 1 was about 1.8-time higher than that from Approach 2, the total economic revenue generated from Approach 2 was about 1.9-fold of that from Approach 1 due to high market value of biofertilizer. It is expected that this study may lead to a paradigm shift in biosolid management towards environmental and economic sustainability.
本研究探索了两种整体方法来共消化活性污泥和食物垃圾。在方法 1 中，混合的活性污泥和食物垃圾首先用真菌糊状物进行水解，产生的水解物无需分离，直接进行厌氧消化。在方法 2 中，真菌糊状物水解食物垃圾后产生的固体直接转化为生物肥料，而具有高可溶性 COD 浓度的分离液体则与活性污泥进一步共消化以生产生物甲烷。尽管方法 1 产生的潜在能量约为方法 2 的 1.8 倍，但由于生物肥料的高市场价值，方法 2 产生的总经济收入约为方法 1 的 1.9 倍。预计本研究可能会导致生物固体管理朝着环境和经济可持续性的范式转变。
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