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Multi-Component Resource Recycling from Waste Light-Emitting Diode Under Hydrothermal Condition: Plastic

Yongliang Zhang,Lu Zhan,Zhenming Xu,

《工程（英文）》 doi: 10.1016/j.eng.2023.04.008

摘要： Light emitting diodes (LEDs) have accounted for most of the lighting market as the technology matures and costs continue to reduce. As a new type of e-waste, LED is a double-edged sword, as it contains not only precious and rare metals but also organic packaging materials. In previous studies, LED recycling focused on recovering precious and strategic metals while ignoring harmful substances such as organic packaging materials. Unlike crushing and other traditional methods, hydrothermal treatment can provide an environment-friendly process for decomposing packaging materials. This work developed a closed reaction vessel, where the degradation rate of plastic polyphthalamide (PPA) was close to 100%, with nano-TiO2 encapsulated in plastic PPA being efficiently recovered, while metals contained in LED were also recycled efficiently. Besides, the role of water in plastic PPA degradation that has been overlooked in current studies was explored and speculated in detail in this work. Environmental impact assessment revealed that the proposed recycling route for waste LED could significantly reduce the overall environmental impact compared to the currently published processes. Especially the developed method could reduce more than half the impact of global warming. Furthermore, this research provides a theoretical basis and a promising method for recycling other plastic-packaged e-waste devices, such as integrated circuits.

关键词： Waste LED     Hydrothermal treatment     Recycling     Plastic PPA degradation     Packaging materials    

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Sustainable design of sanitation system based on material and value flow analysis for urban slum in Indonesia

Ken USHIJIMA, Mitsuteru IRIE, Neni SINTAWARDANI, Jovita TRIASTUTI, Umi HAMIDAH, Tadaharu ISHIKAWA, Naoyuki FUNAMIZU

《环境科学与工程前沿（英文）》 2013年 第7卷 第1期   页码 120-126 doi: 10.1007/s11783-012-0460-5

摘要： Material flow analysis (MFA) and value flow analysis (VFA) were applied to the sanitation system in an urban slum in Indonesia. Based on the results of the MFA and VFA, garbage and excreta disposal costs were evaluated to be 0.7% and 1.1%, respectively, of per capita income. Such value flows seem reasonable in light of the recognized affordability to pay (ATP) standard. However, current excreta disposal methods create negative impacts on downstream populations. Because such disadvantages do not go back to disposers, but passed to downstream, the current value flow structure does not motivate individual toilet users to install treatment facility. Based on current material and value flow structures, a resource recycling sanitation system scenario was examined. Based on VFA, an affordable initial cost for such a system was calculated; this was found to be comparable in price to a cheaper composting toilet that is currently available in the market.

关键词： material flow     value flow     resource recycling system     sustainable design     initial cost     urban slum    

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The Building of Papermaking Enterprise’s Recycling Economy Evaluation Index System Based on Value Flow

Zhi-fang Zhou,Jing Ou,Sha-sha Wang,Xiao-hong Chen

《工程管理前沿（英文）》 2016年 第3卷 第1期   页码 9-17 doi: 10.15302/J-FEM-2016009

摘要： At present, the research on circular economy has made a lot of substantive results both at home and abroad. But for the papermaking enterprise, which is the representative of the light industry, few studies have analyzed the evaluation index system of circular economy. Since the current material flow analyses have limitations that the researchers cannot calculate materials with different units. The authors take advantage of the intrinsic correlation between the basic principle of value flow analysis and circular economy, and then analyze the dynamic changes of material flow and value flow through enterprises internal production process. Considering the resource output, the authors set up the layered structure of the evaluation index system, and then preliminarily determine the index form. Next, the authors use the frequency statistics analysis method to adjust indicators, forming a preliminary index system. After that, the principal component analysis and independent analysis are applied for screening. Finally, the authors build a circular economy evaluation index system for papermaking enterprise to provide scientific guidance for the process of circular economy.

关键词： circular economy     the papermaking enterprise     material flow analysis     value flow analysis     evaluation index system    

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Region-gridding recycling of bulk organic waste: Emerging views based on coordinated urban and rural

Wenbing Tan, Dongyu Cui, Xiaohui Zhang, Beidou Xi

《环境科学与工程前沿（英文）》 2020年 第14卷 第6期 doi: 10.1007/s11783-020-1291-4

摘要： Abstract Bulk organic waste (BOW) has a large output in China. The improper disposal of BOW will not only bring serious environmental pollution, but also cause waste of biomass resources. The viewpoint proposes a region-gridding recycling management system of BOW that highlights the coordinated development of environmental, agricultural and energy elements in urban and rural areas. The viewpoint aims to drive the upstream and downstream industrial chains of BOW treatments, avoid the repeated construction of resource facilities, guide the upgrading of resource-based technologies, promote the professionalization of farmers, and thus built the high-quality modern agricultural recycling industrial park based on system management.

关键词： Bulk organic waste     Recycling     Urban-rural coordination     Management system    

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End-of-life batteries management and material flow analysis in South Korea

Hyunhee Kim, Yong-Chul Jang, Yeonjung Hwang, Youngjae Ko, Hyunmyeong Yun

《环境科学与工程前沿（英文）》 2018年 第12卷 第3期 doi: 10.1007/s11783-018-1019-x

摘要： Consumers increasingly have worn-out batteries as electrical and electronic equipment with new technical developments are introduced into the market and quickly replace older models. As a result, large amounts of end-of-life (EOL) or waste batteries are generated. Such batteries may contain a variety of materials that includes valuable resources as well as toxic elements. Thus, the proper recycling and management of batteries is very important from the perspective of resource conservation and environmental effect. The collection and recycling of EOL batteries is relatively low in South Korea compared to other countries, although an extended producer responsibility (EPR) policy was adopted for battery recycling in 2003. In this study, the management and material flow of EOL batteries is presented to determine potential problems and quantitative flow, based on literature review, site visits to battery recycling facilities, and interviews with experts in the Korea Battery Recycling Association (KBRA), manufacturers, and regulators in government. The results show that approximately 558 tons of manganese-alkaline batteries, the largest fraction among recycling target items, was disposed in landfills or incinerators in 2015, while approximately 2,000 tons of batteries were recovered at a recycling facility by simple sorting and crushing processes. By raising environmental awareness, more diverse and effective collection systems could be established for consumers to easily dispose of EOL batteries in many places. Producers, retailers and distributors in South Korea should also play an important role in the collection of EOL batteries from consumers. Lithium-ion batteries from many electronic devices must be included in the EPR system for resource recovery.

关键词： End-of-life battery     Recycling     Material flow analysis (MFA)     Extended producer responsibility (EPR)     Resource recovery    

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Copper fractal growth during recycling from waste printed circuit boards by slurry electrolysis

《环境科学与工程前沿（英文）》 2021年 第15卷 第6期 doi: 10.1007/s11783-021-1405-7

摘要：

• Copper fractal growth was observed during WPCBs recycling by slurry electrolysis.

关键词： Dendritic copper     Fractal growth     WPCBs     Slurry electrolysis    

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EXPLORING THE RECYCLING OF MANURE FROM URBAN LIVESTOCK FARMS: A CASE STUDY IN ETHIOPIA

《农业科学与工程前沿（英文）》 2021年 第8卷 第1期

摘要：

• Livestock manure was the main organic waste in urban and peri-urban areas.

• Manure production will increase by a factor of 3–10 between 2015–2050.

• Only 13%–38% of excreted N by livestock will be recycled in croplands.

• Intensification of urban livestock production greatly increased N surpluses.

• Reducing population growth and increasing livestock productivity needed.

 

Urban population growth is driving the expansion of urban and peri-urban agriculture (UPA) in developing countries. UPA is providing nutritious food to residents but the manures produced by UPA livestock farms and other wastes are not properly recycled. This paper explores the effects of four scenarios: (1) a reference scenario (business as usual), (2) increased urbanization, (3) UPA intensification, and (4) improved technology, on food-protein self-sufficiency, manure nitrogen (N) recycling and balances for four different zones in a small city (Jimma) in Ethiopia during the period 2015-2050. An N mass flow model with data from farm surveys, field experiments and literature was used. A field experiment was conducted and N use efficiency and N fertilizer replacement values differed among the five types of composts derived from urban livestock manures and kitchen wastes. The N use efficiency and N fertilizer replacement values were used in the N mass flow model.

Livestock manures were the main organic wastes in urban areas, although only 20 to 40% of animal-sourced food consumed was produced in UPA, and only 14 to 19% of protein intake by residents was animal-based. Scenarios indicate that manure production in UPA will increase 3 to 10 times between 2015 and 2050, depending on urbanization and UPA intensification. Only 13 to 38% of manure N will be recycled in croplands. Farm-gate N balances of UPA livestock farms will increase to>1 t·ha−1 in 2050. Doubling livestock productivity and feed protein conversion to animal-sourced food will roughly halve manure N production.

Costs of waste recycling were high and indicate the need for government incentives. Results of these senarios are wake-up calls for all stakeholders and indicate alternative pathways.

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Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

《环境科学与工程前沿（英文）》 2014年 第8卷 第4期   页码 570-579 doi: 10.1007/s11783-013-0604-2

摘要： Crop residues are an important biomass, and are significant in the sustainable development of China. This paper uses the Grey-Markov modeling approach, the cost-benefit analysis method, and the constraint optimization method to establish the potential of crop residue recycling in China (CRRC) using a bottom-up analysis. Taking 2010 as the baseline year, the CRRC model is used to determine the quantity trends of crop residue resources, simulating the recycling potential and selecting key crop residue recycling technologies for operation between 2010 and 2030. The results illustrate that the total residue output from different crops will gradually increase to 1062 million tons in 2030. The proportion of crop residue for field burning is expected to decrease as a result of guidance and support from the government. Market mechanisms are also improving the development of the crop residue recycling industry. The economic benefit of crop residue recycling is expected to be worth 132 billion CNY in 2030 according to technology structure options. Key crop residue recycling technologies preferred such as liquefaction, amination, silo, co-firing straw power and composting will account for more than 85% of the total benefits.

关键词： China     crop residue     recycling potential     technology options    

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舰船综合保障系统设计

祝 泓,张 平

《中国工程科学》 2015年 第17卷 第5期   页码 44-50

摘要：

本文在分析国外综合保障系统的基础上，提出了适用于我国舰船的保障系统顶层设计方案，给出了系统组成、主要功能和主要技术指标，将综合保障系统划分为保障资源系统、装备综合保障管理信息系统、装备故障诊断与健康管理系统三个分系统，并对各分系统的系统功能和组成进行了阐述，为舰船装备开展综合保障系统集成和管理提供了参考。

关键词： 舰船     综合保障系统     系统设计     保障资源    

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Dynamic simulation based optimized design method of concrete production system for RCC dam

ZHAO Chunju, ZHOU Yihong

《结构与土木工程前沿（英文）》 2007年 第1卷 第4期   页码 405-410 doi: 10.1007/s11709-007-0055-6

摘要： The construction system of roller compacted concrete (RCC) dam is running according to a series of connected procedures which are highly impacted and interacted consisting with the resource level. Therefore, a dynamic simulation mode

关键词： interacted     dynamic simulation     construction     resource     RCC    

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资源循环

邱定蕃

《中国工程科学》 2002年 第4卷 第10期   页码 31-35

摘要：

资源是一个国家可持续发展的基础。人类不能无限制地开发自然资源（矿物），而应该尽可能反复利用,逐步建立起资源循环。资源循环学，就是研究如何利用这些产物建立循环系统的科学。资源循环是一个规律，是人类与自然和谐共处、可持续发展的必由之路。资源开发又与环境污染密切相关。尽早建立资源循环型社会，有可能从根本上解决资源短缺和环境污染问题。建立资源循环型社会是一个系统工程，需要政府重视，制定相应法律，科技、教育先行和全社会的共同努力。

关键词： 资源     资源循环     资源开发     资源型社会    

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加快我国新能源汽车动力电池回收利用的建议

赵世佳,徐楠,乔英俊,杨波

《中国工程科学》 2018年 第20卷 第1期   页码 144-148 doi: 10.15302/J-SSCAE-2018.01.021

摘要：

在国家政策引导和支持下，我国新能源汽车产业发展迅猛，预计到2020年新能源汽车保有量将超过500万辆。随之而来的新能源汽车动力电池回收利用问题成为行业内的重大议题。动力电池如不进行有效回收处理，将造成严重的环境污染及资源浪费。美、德、日等发达国家均已提前布局动力电池回收领域。本文对我国新能源汽车动力电池回收利用存在的问题开展深入分析，为我国加快动力电池发展提出具体的建议。

关键词： 新能源汽车     动力电池     回收    

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Optimal Timing and Recycling Operation Mode for Electro-Mechanical Products Active Remanufacturing

Wang Gao,Tao Li,Shi-tong Peng,Liang Wang,Hong-chao Zhang

《工程管理前沿（英文）》 2016年 第3卷 第2期   页码 115-122 doi: 10.15302/J-FEM-2016019

摘要： The uncertainties of remanufactured products in multi-life cycle service, such as injury and restoration process route, are comprehensively analyzed in the present study from perspectives of cost and the environment. Based on life cycle assessment method and the life cycle cost analysis, the optimal timing model of active remanufacturing for electro-mechanical products is established considering these uncertainties. In addition, regarding the active remanufacturing as its guidance, this study explores the economic efficiency and corresponding operation mode of electro-mechanical products when recycling in the optimal timing. To validate the optimal timing model for electro-mechanical products active remanufacturing, a specific type of product is taken as a case study with mathematical statistics method and Monte Carlo simulation.

关键词： electro-mechanical products     active remanufacturing     optimal timing     reverse logistics     recycling mode    

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Recycling Materials from Waste Electrical and Electronic Equipment

Jinhui Li

《环境科学与工程前沿（英文）》 2017年 第11卷 第5期 doi: 10.1007/s11783-017-1001-z

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矿产资源安全巨系统理论方法与实践

陈其慎,张艳飞,邢佳韵,龙涛,郑国栋,王琨,任鑫,李振清,李强

《中国工程科学》 2023年 第25卷 第6期   页码 191-201 doi: 10.15302/J-SSCAE-2023.10.001

摘要：

矿产资源的自然属性、经济属性和社会属性，决定了矿产资源安全涉及众多资源类型、宏大空间分布、超长产业链条、巨大产业规模、跨越时空配置、复杂因素影响、层次纷繁多样。矿产资源安全规模之大、层次之多、影响因素之复杂难以穷尽，是一个复杂巨系统。使矿产资源安全巨系统高效运转以服务经济社会发展，是一项复杂性科学难题。本文引入系统科学的研究思路，提出了矿产资源安全巨系统概念，刻画了矿产资源安全巨系统的结构和组成，揭示了自然资源、经济、社会等因素对矿产资源安全巨系统的驱动机理，形成了矿产资源安全巨系统理论。在此基础上，建立了涵盖以系统思维研究构建矿产资源安全保障的理论知识模型、构建基于大数据平台的仿真实验系统、积极推动政府决策与反馈三大环节的矿产资源安全系统工程学研究新方向，提出了建立矿产资源安全的总体设计部战略思想。研究成果已应用于国家资源安全保障工作实践，有效支撑了国家矿产资源安全保障工作。

关键词： 矿产资源安全；巨系统；系统工程学；大数据平台    

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标题 作者 时间 类型 操作

Multi-Component Resource Recycling from Waste Light-Emitting Diode Under Hydrothermal Condition: Plastic

Yongliang Zhang,Lu Zhan,Zhenming Xu,

期刊论文

Sustainable design of sanitation system based on material and value flow analysis for urban slum in Indonesia

Ken USHIJIMA, Mitsuteru IRIE, Neni SINTAWARDANI, Jovita TRIASTUTI, Umi HAMIDAH, Tadaharu ISHIKAWA, Naoyuki FUNAMIZU

期刊论文

The Building of Papermaking Enterprise’s Recycling Economy Evaluation Index System Based on Value Flow

Zhi-fang Zhou,Jing Ou,Sha-sha Wang,Xiao-hong Chen

期刊论文

Region-gridding recycling of bulk organic waste: Emerging views based on coordinated urban and rural

Wenbing Tan, Dongyu Cui, Xiaohui Zhang, Beidou Xi

期刊论文

End-of-life batteries management and material flow analysis in South Korea

Hyunhee Kim, Yong-Chul Jang, Yeonjung Hwang, Youngjae Ko, Hyunmyeong Yun

期刊论文

Copper fractal growth during recycling from waste printed circuit boards by slurry electrolysis

期刊论文

EXPLORING THE RECYCLING OF MANURE FROM URBAN LIVESTOCK FARMS: A CASE STUDY IN ETHIOPIA

期刊论文

Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

期刊论文

舰船综合保障系统设计

祝 泓,张 平

期刊论文

Dynamic simulation based optimized design method of concrete production system for RCC dam

ZHAO Chunju, ZHOU Yihong

期刊论文

资源循环

邱定蕃

期刊论文

加快我国新能源汽车动力电池回收利用的建议

赵世佳,徐楠,乔英俊,杨波

期刊论文

Optimal Timing and Recycling Operation Mode for Electro-Mechanical Products Active Remanufacturing

Wang Gao,Tao Li,Shi-tong Peng,Liang Wang,Hong-chao Zhang

期刊论文

Recycling Materials from Waste Electrical and Electronic Equipment

Jinhui Li

期刊论文

矿产资源安全巨系统理论方法与实践

陈其慎,张艳飞,邢佳韵,龙涛,郑国栋,王琨,任鑫,李振清,李强

期刊论文