Istanbul Technical University, Environmental Engineering Department, Maslak, 34469, Istanbul, Turkey.
Istanbul Technical University, Environmental Engineering Department, Maslak, 34469, Istanbul, Turkey; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak 34469, Istanbul, Turkey.
Bioresour Technol. 2024 Feb;394:130198. doi: 10.1016/j.biortech.2023.130198. Epub 2023 Dec 15.
Anaerobic co-digestion of fat-oil-grease (FOG) and food waste (FW) with sewage sludge (SS) in wastewater treatment plants is a method used to increase biogas production. In this study, digestion scenarios were compared using plant-wide modeling and life cycle assessment: Scenario-0 (mono-digestion of waste-activated sludge (WAS)), Scenario-1 (co-digestion of WAS with FOG), and Scenario-2 (co-digestion of WAS with FW). Scenario-0, with the highest energy use and landfilling of FOG/FW, has the worst environmental impact. Scenario-1 and Scenario-2 minimize the environmental load by energy recovery and avoiding landfilling of organic waste. Scenario-wise, the change in greenhouse gas (GHG) emissions from treatment was negligible. However, due to the impact of landfilling, GHG emissions in Scenario-0 were 21% and 30% higher than in Scenario-1 and 2, respectively. The environmental benefit of anaerobic co-digestion of FOG/FW with SS is not only in the contribution to energy production but also in the recycling of organic waste.
在污水处理厂中，利用脂肪油油脂（FOG）和食物垃圾（FW）与污水污泥（SS）进行厌氧共消化是一种增加沼气产量的方法。在这项研究中，使用全厂建模和生命周期评估对消化方案进行了比较：方案 0（单独消化废活性污泥（WAS））、方案 1（WAS 与 FOG 共消化）和方案 2（WAS 与 FW 共消化）。方案 0 具有最高的能源使用和 FOG/FW 的填埋，对环境的影响最差。方案 1 和方案 2 通过能源回收和避免有机废物填埋来最小化环境负荷。从方案来看，处理过程中的温室气体（GHG）排放变化可以忽略不计。然而，由于填埋的影响，方案 0 中的 GHG 排放量比方案 1 和 2 分别高 21%和 30%。SS 与 FOG/FW 的厌氧共消化的环境效益不仅在于对能源生产的贡献，还在于有机废物的回收利用。
