垃圾分类背景下广州市可回收物组分与特性研究

环境卫生工程

• • 下一篇

垃圾分类背景下广州市可回收物组分与特性研究

广州市城市管理技术研究中心

Research on the component and Characteristics of recyclables in Guangzhou City Under the Background of MSW

Guangzhou City Management Technical Research Center

摘要/Abstract

摘要：

资源回收利用是“无废城市”建设中关键一环，而可回收物的回收利用是垃圾分类工作中的短板。本文以典型区域为切入点，通过现场调研、实验分析等方式，研究居民生活垃圾中可回收物产生及分类情况，分析其组分及理化特性等情况。结果表明：近10年广州进入环卫清运系统生活源垃圾组分显示，可回收物占比（9.9%-24.5%）波动变化中逐渐降低，其中高值可回收物近10年均值为6.73%，低值可回收物波动下降。2021-2023年，G街道年生活垃圾产生量中高值占比（21.2%-33.34%）逐年升高，低值占比降低；G街道黑桶中按垃圾分类组分分析，可回收物占比由23.73%降至15.8%，其中纸、塑、金均逐年降低；按物理组分，橡塑类（28.58%-31.28%）含量较高，纸类和玻璃类略升高；6类样品理化特性显示，废纸类含水率（38.94%±3.30%）最高，塑料袋和塑胶热值高于生活垃圾均值，塑料袋和纸皮类的灰分较高，其他4类均在1.00%左右；塑料袋的Pb和Hg浓度(以干基计)含量最高，为(11.75±6.18)、(0.063±0.086) mg/kg，其次总Cr、As浓度含量也较高；织物的总Cr含量最高，塑料、织物等混入终端焚烧会加重飞灰、炉渣的重金属毒性。本研究结果可为可回收物选择合适的回收处理方式提供参考依据，提升其回收率及经济价值，助力“无废城市”建设。

关键词:

text-align:justify, 可回收物；组分；理化特性；生活垃圾；广州 ')">"> 可回收物；组分；理化特性；生活垃圾；广州

Abstract:

The recycling and utilization of renewable resources is a key link in the construction of a "waste free city", and the recycling and utilization of recyclable materials is a shortcoming in MSW. This study focuses on typical regions, investigating the generation and classification of recyclables in household waste through literature review, field surveys, and experimental analysis, with an emphasis on their composition and physicochemical properties. The results indicate that, over the past 10 years, the proportion of recyclables (9.9% to 24.5%) in the components of household waste in Guangzhou's sanitation collection system has gradually decreased, with high-value recyclables averaging 6.73% and low-value recyclables exhibiting a decreasing trend. From 2021 to 2023, the proportion of high-value domestic waste generated in G Street (21.2%-33.34%) has been increasing year by year, while the proportion of low value waste has decreased.. According to the analysis of garbage classification components in the black bins of G Street, the proportion of recyclable materials has decreased from 23.73% to 15.8%, with paper, plastic, and metal all decreasing year by year. Regarding physical composition, the content of rubber and plastic (28.58% to 31.28%) was relatively high, while the proportions of paper and glass were slightly higher.The physicochemical analysis of six waste categories showed that waste paper had the highest moisture content (38.94%±3.30%), while plastic bags and plastics is higher than the average value of household waste. The ash content of plastic bags and paper scraps was relatively high, while the other four categories remained around 1.00%.The concentrations of Pb and Hg (on a dry basis) in plastic bags were the highest, measured at (11.75±6.18) and (0.063±0.086) mg/kg, respectively, followed by elevated levels of total Cr and As. The total Cr content of fabrics is the highest, and the mixing of plastics, fabrics, etc. into terminal incineration will increase the heavy metal toxicity of fly ash and slag. The results of this study can provide reference for selecting appropriate recycling methods for recyclable, improving their recycling rate and economic value, and assisting in the construction of a "waste free city".

Key words: recyclables; component; physical and chemical properties; domestic garbage')">

recyclables; component; physical and chemical properties; domestic garbage, Guangzhou

高慧. 垃圾分类背景下广州市可回收物组分与特性研究[J]. 环境卫生工程, 0, (): 0-.

GAO Hui.

Research on the component and Characteristics of recyclables in Guangzhou City Under the Background of MSW [J]. Environmental Sanitation Engineering, 0, (): 0-.

参考文献

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed