题目:Recycling phosphorus from waste in China: Recycling methods and their environmental and resource consequences


作者:Xuewei Liu, You Zhang , Mingjin Cheng , Songyan Jiang, Zengwei Yuan


期刊名:Resources, Conservation and Recycling


关键词:Phosphorus cycle;Waste recycling;Phosphorus loss;Feedback model;Scenario analysis;Phosphate reserve


主要内容


为了缓解大量开采使用磷矿石而造成的资源和环境压力,从废物中回收磷是一个有效途径。为了更好地了解废物回收方式与磷循环过程之间的反馈,本研究建立了磷废物反馈模型,并用于预测几种管理情景下中国磷废物的产生、回收、损失和磷矿石消耗。


针对每种情况分析了三种循环方式,即“废物循环作肥料”、“废物作饲料”和“废物作工业材料”。结果表明,居民选择更均衡的饮食会大大增加磷的环境流失和磷矿石的消耗。综合采用各种可持续措施可以抵消这些环境与资源影响,磷损失和磷矿石消耗将分别较 2015年下降50%和 62%。“废物作肥料”循环方式将人均磷矿石消耗量从 10 kg P y-1 减少到 2.6 kg P y-1,“废物作饲料”方式则将人均磷损失量从 6.2 kg P y-1 减少到 2.2 kg P y-1。在这三种循环方式中,“废物作工业材料”的环境与资源效益较差。“废物作肥料”会将磷储量耗竭的压力降到最低,但中国的经济可采磷矿石储量仍将在 2053 年前后枯竭。


                                 

 Graphical abstract



Fig. 1. The sources of fertilizer P and feed P by 2060 under scenarios. The size of the pie chart stands for the feed or fertilizer P demand. Suffix ‘-FT’: waste as fertilizer, ‘-FD’: waste as feed, ‘-M’: waste as material.


Fig. 2. P waste generation (a), recycling (b) and P loss (c and d) in 2060 under different scenarios and in 2015. BAU: business as usual, RPI: reducing P input of crop farming, DC: dietary change, IR: improving recycling rate, IT: increasing trade (import) of P products, IM: integrating all the measures.