A Cloud-Based Disassembly Planning Approach towards Sustainable Management of WEEE

This paper investigates the regulations, recycling and treatment of WEEE (waste electrical and electronic equipment) in China. An online survey about Chinese households’ treatment of WEEE is conducted. Optimization models are used to compare the performances of WEEE treatment in two different recycling networks. In the first network, WEEE is collected and sent by recycling stations to licensed WEEE recycling and treatment centers for testing and dismantling. In the second network, WEEE are tested and dismantled at small recycling workshops in residential districts, and then parts/components that require further processing are sent to licensed WEEE recycling and treatment centers. The performances of the two networks are analyzed with linear programming models. The results indicate that the second model is more effective with lower cost and higher recycling efficiency.

WEEE recycling in Zhejiang Province, China: generation, treatment, and public awareness

Global E-waste management: Can WEEE make a difference? A review of e-waste trends, legislation, contemporary issues and future challenges

Waste electrical and electronic equipment (WEEE) which contains various valuable and harmful materials is an inevitable waste in modern society. In order to resolve the pollution problems associated with WEEE treatment, a WEEE management system has been established in China. The main role of importers and manufacturers of electrical and electronic equipment (EEE) is to pay the treatment fees to facilitate the WEEE recycling in China. The announced treatment and subsidy fee is given by set, not by the weight of WEEE. There is no lesser green treatment fee for the producers which can produce environmentally friendly EEE in China. Also, the recovery of refrigerants from the foaming agent of refrigerators is not required in China. In total, 45 million sets of recycled WEEE were certified in 2020, a year that contains the most updated data. Among them, 48%, 14%, 20%, 10% and 8% are for TV, refrigerator, washing machine, computer and air conditioners, respectively. The spatial analysis indicates that the WEEE recycling activities are mainly concentrated on the mid-east and east regions of China. It also can be concluded that the certified amount of each province has higher positive correlation with provincial population than provincial GDP per capita and green recovery rate. It also clearly notes that the amount of recycled air conditioner is the lowest for each province. Thus, more effort should be conducted to increase the recycling of scrapped air conditioner in China.

How are WEEE doing? A global review of the management of electrical and electronic wastes

Toxic metals in WEEE: Characterization and substance flow analysis in waste treatment processes

While significant focus has been placed on the environmental and health impacts of waste electrical and electronic equipment (WEEE) treatment, a gap exists with respect to job creation in WEEE treatment. The creation of employment opportunities, and especially of decent work, is an important factor in the growing green and circular economies. This research investigates potential job creation in the Irish WEEE pre-treatment sector by examining the labour requirements at a certified e-recycling facility which conducts all necessary pre-treatment processes, as detailed in the WEEE Directive, and is currently treating 75% of Ireland's WEEE. The study developed and executed a method of estimating the mass of WEEE associated with full-time job equivalencies per category treated. Through observation and measurement of the methods and time required for each of the pre-treatment steps and using categorisations of WEEE established by United Nations University to assign weights per unit, it was determined that between 338 and 1,967 tonnes were required to equate with one full-time job for the categories large household appliances (LHA), CRT/LCD/LED screens, microwave ovens, and mixed waste. Subsequently, the results were applied in order to estimate the foregone jobs due to untreated WEEE arising in scrap metal collections. It was found that diversion of this waste to a WEEE pre-treatment facility would result in the creation of more than 12 jobs. This research opens doors to further investigate job creation across European Union (EU) member states and globally using the straightforward and consistently applicable and adaptable methods developed here.

Improper collection and processing of waste electrical and electronic equipment (WEEE) pose a serious threat to the environment and prevent the recovery of valuable materials. Due to the decreasing availability of resources and production materials, the relevance of WEEE recycling has increased. WEEE should be seen as an important source of raw materials for European economies. Moreover, e-waste recycling has a positive impact on the environment by limiting energy use and CO2 emissions during ore processing. The objective of this study was the analysis of the product use times, the reasons for purchasing new devices, and the consumers’ behavior, knowledge, and awareness concerning WEEE collection and treatment. This study discusses these issues based on a survey on electronic waste management in Wroclaw (Poland). The results from 495 questionnaire respondents indicated a shortening use time of many types of electronic and electric equipment (EEE). The “failure of the device” was the primary reason respondents replaced their products. It was indicated by 90% of the respondents. In many cases, the repair of devices was unprofitable. The most important factor determining the purchase of new devices was their price. The environmental factors, mainly those giving economic benefits, were also considered. Despite the implementation of the extended producer responsibility, the functioning model of WEEE collection has proven to be ineffective. A significant amount of small WEEE ended up in waste bins. For this reason, the willingness of residents to pay an additional fee for WEEE collection was also estimated. The results indicated that campaigns to increase residents’ awareness of WEEE management should continue.

23 - WEEE management in China

Comprehensive knowledge of built-in batteries in waste electrical and electronic equipment (WEEE) is required for sound and save WEEE management. However, representative sampling is challenging due to the constantly changing composition of WEEE flows and battery systems. Necessary knowledge, such as methodologically uniform procedures and recommendations for the determination of minimum sample sizes (MSS) for representative results, is missing. The direct consequences are increased sampling efforts, lack of quality-assured data, gaps in the monitoring of battery losses in complementary flows, and impeded quality control of depollution during WEEE treatment. In this study, we provide detailed data sets on built-in batteries in WEEE and propose a non-parametric approach (NPA) to determine MSS. For the pilot dataset, more than 23 Mg WEEE (6500 devices) were sampled, examined for built-in batteries, and classified according to product-specific keys (UNUkeys and BATTkeys). The results show that 21% of the devices had battery compartments, distributed over almost all UNUkeys considered and that only about every third battery was removed prior to treatment. Moreover, the characterization of battery masses (BM) and battery mass shares (BMS) using descriptive statistical analysis showed that neither product- nor battery-specific characteristics are given and that the assumption of (log-)normally distributed data is not generally applicable. Consequently, parametric approaches (PA) to determine the MSS for representative sampling are prone to be biased. The presented NPA for MSS using data-driven simulation (bootstrapping) shows its applicability despite small sample sizes and inconclusive data distribution. If consistently applied, the method presented can be used to optimize future sampling and thus reduce sampling costs and efforts while increasing data quality.

Process simulator and environmental assessment of the innovative WEEE treatment process

WEEE flow and mitigating measures in China

Challenges in legislation, recycling system and technical system of waste electrical and electronic equipment in China

Waste electrical and electronic equipment (WEEE) is a rapidly growing category of solid waste. China is now facing WEEE problems from both growing domestic generation and illegal imports. Currently, the amount of WEEE formally treated has increased steadily in China. The layout of the formal sector has been basically completed. Meanwhile, by controlling illegal disassembly activities, the informal sector has been gradually transformed to formal one. Beginning with the overview of the WEEE recycling industry in China, this paper first lists the latest progress in WEEE management from such aspects as the new edition of China RoHS Directive (Restriction of Hazardous Substances Directive), the updated WEEE Treatment List, the updated WEEE fund standard, the revised National Hazardous Waste List, and a brand-new plan on extended producer responsibility. In so doing, we elucidate the current challenges on WEEE management in detail: the imbalance between fund levies and subsidies, the gap in the supervision scope, the homogenization of recycling industry and the lack of life cycle approaches. Finally, a conceptual framework for integrated management of WEEE is proposed from a life cycle perspective. Overall, the life cycle management of WEEE includes three aspects: developing life cycle information for decision-making, implementing life cycle engineering with life cycle tools, and improving WEEE legislation based on life cycle thinking. By providing specific operating strategies, this life cycle framework should help to optimize WEEE management in developing countries where legislation is imperfect and the recycling system is relatively immature.

Introduction: The production of Waste Electrical and Electronic Equipment (WEEE) has grown rapidly in recent years. It is necessary to determine the amount of them for its effective management. The aim of this study was to determine the amount of WEEE stored in the houses of Yazd citizens and the level of Knowledge, Attitude and Practice (KAP) of citizens regarding WEEE management. Materials and Methods: This descriptive, cross-sectional study was carried out using random sampling on 300 Yazdian citizens. To determine the amount of WEEE stored in houses and the level of KAP of people regarding WEEE, was used a researcher-made questionnaire whose validity and reliability were confirmed and data analysis was performed using nonparametric tests in SPSS. Results: The amount of WEEE in the study population was 21.8 metric tons was obtained. Of these, the highest amount of waste was related to the refrigerator with 3.9 metric tons and the highest number of used equipment stored was related to cell phone, with 285 units. The levels of knowledge (with a mean score of 5.06 ± 2.5), attitude (with a mean score of 43.37 ± 5.21), and practice (with a mean score of 10.71 ± 2.95) were respectively in moderate, good and moderate conditions. Conclusion: Given planning by the Waste Organization leads to job creation, access to valuable raw materials, and environmental protection. With increasing knowledge about the proper use of electronic and electrical equipment, their useful life can be increased and the process of their conversion to waste can be extended.