|Alternative Title||Resources and environmental benefits and network optimization of waste electrical and electronic equipment recycling in Beijing-Tianjin-Hebei region|
|Place of Conferral||北京|
|Keyword||电子废弃物，回收利用潜力，资源环境效益，网络特征，优化策略 E-waste（weee）, Recycling Potential Assessment, Resources And Environmental Benefits, Network Characteristics,Optimization Strategies|
Waste electrical and electronic equipment (WEEE or e-waste) has high recycling value. Currently, informal recycling has seriously restricted the improvement of regional environmental quality and the recycling of resources. The Beijing-Tianjin-Hebei region is characterized by intensive resource consumption and serious environmental pollution. E-waste recycling network of Beijing-Tianjin-Hebei needs to be improved urgently. Based on the analysis of the recycling potential of e-waste in Beijing-Tianjin-Hebei, and referring to the ecological network analysis method, this paper constructed three kinds of e-waste recycling network models. The e-waste recycling network models included the whole life cycle process of electronic products, such as ,consumption, recycling, treatment and emission According to whether the e-waste transfer between Beijing, Tianjin and Hebei, the e-waste recycling network models were divided into three types. The corresponding analysis methods of network characteristics and environment effects were proposed. Based on the survey data of e-waste qualification processing enterprises and relevant associations, taking waste air conditioning as an example, the positive effect of the regional synergism network model on e-waste recycling system is verified by comparing the characteristics of network connectivity, stability, ascendancy, recyclability, functional relationship, compartment contribution and resources and environmental benefits. Finally, under the scenario of reaching the 2025 government-planned standard recycling rate target (50%), the characteristics of the waste air conditioning recycling network in Beijing-Tianjin-Hebei from 2018 to 2025 are predicted, the network optimization regulations scheme were identified by scenario analysis, and the optimization management strategies of the e-waste recycling network were put forward. This research provided scientific basis and theoretical support for improving the recycling system of e-waste in Beijing-Tianjin-Hebei and contributing to regional cooperative management. It also provided methods references and theoretical guidances for the research on the recycling of other renewable resources. The main research results are as follows:
(1) According to different regions and product types, different scrap coefficients were set, and an improved retention coefficient method was proposed to improve the accuracy of estimation of regional e-waste production. Based on the improved estimation method, it can be found that the amount of washing machines, refrigerators, air conditioners, televisions and computers (five major e-waste waste) is increasing continuously from 2010 to 2025 in Beijing-Tianjin-Hebei. The total amount in 2025 will be 18.6×104 units, which is 2.70 times that in 2010. About 50×104 tons of common metals, precious metals and plastics can be recovered, generating economic value of 5 billion yuan. The waste air conditioner is expected to be the e-waste with the highest recycling potential in the next few years. However, the waste air conditioner’s qualified treatment capacity needs to be improved urgently.
(2) Based on the pollutant coefficient method, the maximum theoretical resource and environmental benefits produced by five major e-waste recycling in Beijing-Tianjin-Hebei region are quantified. It is concluded that they can reduce 10.36 million tons of primary ore mining and standard coal utilization, 25 million tons of "three wastes" emission, 6×104 tons of heavy metal pollutant emission and 33×104 tons of greenhouse gas emission (CO2-eq), which will effectively improve the energy saving and pollutant emission reduction capability of the region. Based on material flow analysis, the node paths of the three network models are quantified, and it is found that Tianjin qualified processing enterprises can effectively relieve the pressure of standardized recycling of waste air conditioners in Beijing and Hebei Province, and have made outstanding contributions to regional resource conservation and environmental quality.
(3) Referring to the ecological network analysis method, three kinds of electronic waste recycling network models are constructed from the perspective of life cycle and whether the electronic waste transfer between Beijing, Tianjin and Hebei is considered, and corresponding network characteristics and resource and environment benefit analysis methods are proposed. Through the analysis of network characteristics, the positive promotion effect of the regional synergism network on regional e-wastes recycling is confirmed. Based on scenario analysis, it is found that the network characteristics and resources and environment benefits are on the rise with the increase of qualified treatment capacity of regional waste air conditioners in 2018 to 2025. Increasing the market share of the formal recycling departments and the proportion of informal recycling departments that flow into qualified processing enterprises can significantly improve the resources and environmental benefits, network stability, ascendancy, recyclability and contribution of the formal recycling sectors, etc., and the network maintains good symbiotic synergy.
(4) Combined with the research conclusion, the paper put forward targeted regional e-waste recycling network efficient and synergism management strategies from relevant parties in the e-waste recycling process such as consumer departments, recycling departments, qualification processing enterprises, governments and associations.
|陈盼. 京津冀电子废弃物回收利用的资源环境效益及网络优化研究[D]. 北京. 中国科学院生态环境研究中心,2019.|
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