School of Economics and Management, North China Electric Power University, Hui Long Guan, Chang Ping District, Beijing, 102206, China.
Beijing Key Laboratory of New Energy and Low-Carbon Development, North China Electric Power University, Hui Long Guan, Chang Ping District, Beijing, 102206, China.
Environ Sci Pollut Res Int. 2019 Apr;26(10):10374-10386. doi: 10.1007/s11356-019-04454-1. Epub 2019 Feb 14.
The disposal of food waste has attracted worldwide attention. Each year, the amount of wasted food accounts for an estimated one third of annual food production globally. This large amount of food waste has caused serious land, water, and air pollution. In the past, most research on food waste was focused solely on food waste disposal processing. Only a few studies analysed the flow of materials in food waste treatment processes. Therefore, this paper focused on the process of food waste anaerobic treatment in Beijing and investigated the treatment. According to a life cycle theory, the food waste treatment process is divided into three processes: "collection and transportation, disposal, and resource utilization." This paper analysed the input and output of food waste treatment in different processes and evaluated the economic and environmental costs and benefits of food waste treatment. The study found that 200 t of food waste anaerobic treatment can obtain benefits 66,888 Chinese yuan, generate electricity energy 43,350 kW⋅h, and reduce carbon dioxide emissions 16,087 kg. Generally, the economic and environmental benefits of the food waste anaerobic treatment project are considerable. However, the economic benefits are mainly from government subsidies. There are many impurities in food waste, which indicates some problems in food waste treatment. Thus, the proposals to strengthen waste classification, optimize the layout of garbage collection and transportation, and accelerate the development of waste treatment plants have been put forward.
食物浪费的处理已引起全球关注。每年，全球估计有三分之一的食物被浪费，这造成了严重的土地、水和空气污染。过去，大多数关于食物浪费的研究仅集中在食物浪费处理加工上。只有少数研究分析了食物废物处理过程中的物质流。因此，本文重点研究了北京的食物废物厌氧处理过程，并对其进行了处理。根据生命周期理论，食物废物处理过程分为“收集和运输、处理和资源利用”三个过程。本文分析了不同过程中食物废物处理的投入和产出，并评估了食物废物处理的经济和环境成本与效益。研究发现，200 吨食物废物厌氧处理可获得 66,888 元收益，产生 43,350kW·h 电量，并减少二氧化碳排放 16,087kg。总的来说，食物废物厌氧处理项目的经济效益和环境效益相当可观。然而，经济效益主要来自政府补贴。食物废物中含有许多杂质，这表明食物废物处理存在一些问题。因此，提出了加强垃圾分类、优化垃圾收集和运输布局以及加快废物处理厂发展的建议。
