Recycling sludge in agriculture? Assessing sustainability of nutrient recovery in Italy
采用混合多区域投入产出方法，追踪意大利污泥养分回收策略的可持续足迹，并与填埋对比，发现污泥制有机肥能创造更多就业并减少温室气体排放，但填埋对经济刺激更强且减少能源载体使用更多。
Abstract Using a hybrid multi-regional input–output approach, we traced sustainability footprints of a nutrient recovery strategy from sewage sludge applied in Italy. We then compared the results with the most common landfilling practice. Overall, accounting for indirect global upstream effects, using sewage sludge for organic fertiliser production generates more jobs and reduces more greenhouse gas emissions than landfilling. By contrast, landfilling stimulates the whole economy more, generating higher indirect turnover and reduces energy carrier use more. Finally, we accounted for uncertainties in these results using an error propagation method based on Monte Carlo simulations.