Improving the Performance of Urban Waste Management Systems in the Context of a Closed-Loop Supply Chain

The saving of non-renewable energies, as well as the reduction of emissions into the environment, are two crucial objectives of industrial production. The recovery of post-consumer products associated with the use of end-of-life products is part of a context of optimization of these objectives. This recovery maximizes the use of resources from end-of-life products in a circular logic while recording the environmental footprint. This study considers a recycling strategy adapted to the need and urgency to reduce greenhouse gas emissions caused by global warming. The proposed model aims to optimize the profits of the circular manufacturing strategies while minimizing operational costs (collection, sorting, recycling), transport, GHG emissions and recycling. In this paper, a compromise between the gains of CM and the costs associated with it was studied. The robustness of the designed model was tested using a case study based on real-world scenarios. A sensitivity analysis was carried out to study the impact of the emission cost on the overall objective, considering the two options currently offered to industries. The obtained results support companies to take the ecological aspect into account and integrate sustainable development into their strategic axes for their logistics supply chains.

Solid Waste Management Challenges in Urban Areas of Ghana: A Case Study of Bawku Municipality

This study was conducted in the Bawku Municipality of the Upper East, Ghana, with the view to assessing the factors that impede the management of solid waste. Questionnaires were submitted to 150 randomly selected households, while face-to-face semi-structured interviews were conducted with the municipal Waste Management Department and a private waste management company, Zoomlion Ghana Ltd. Data collected included components of solid waste generated, waste collection, transportation and final disposal methods, the challenges confronting waste management institutions, and respondents' knowledge and perceptions of the waste management system and their attitudes towards it. Components of wastes generated were organic waste, paper waste and plastics. Factors that adversely affected waste collection and transportation systems were the inadequate supply of waste collection containers, the existence of a weak waste transportation system and a low patronage of the door-to-door collection method. The study showed that the municipal landfill did not meet the required standard. The results also revealed the lack of public awareness on issues regarding waste and lack of a participatory approach that makes the people an active stakeholder in the waste management system. This situation accounted for indiscriminate disposals of waste by most respondents who viewed the issue of waste management as the exclusive responsibility of the local government. The study further showed that the waste management institutions were faced with financial difficulties, understaffing and poor logistics and nature of roads, and social constraints. The study therefore suggests the development of a strategic plan for efficient waste management which revolves around these findings.

Current State, Shortcomings, and Strategies to Improve China’s Waste Recycling Network: Optimization of Regional Site Selection for Waste Disposal Systems Based on Supply Chain Management

Based on the basic supply chain model,the status quo of waste recycling in China is examined by analyzing and comparing the changes in the waste recycling network and the problems of siting in relation to China’s waste disposal system.

Evaluation of the efficiency of urban solid waste management in Brazil by data envelopment analysis and possible variables of influence

This article has the general objective of estimating the efficiency of urban solid waste management in 940 Brazilian munici-palities through Data Envelopment Analysis(DEA)technique and has specific objectives:(i)to estimate efficiency scores;(ii)to compare the performance between different groups of municipalities;and(ii)to analyze the profile of efficient munici-palities from the perspective of the guidelines of Law 12,305/2010 and socio-economic and environmental indicators.The technique used was DEA with output-oriented and variable scale to return modeling.The results showed higher efficiency scores in the municipalities with populations above 500,000 inhabitants.The score variation ranged from 0.5(municipalities with populations<10,000 inhabitants)to 0.9(municipalities with more than 500,000 inhabitants).Of the sample set,only 12.34%of the municipalities were considered efficient,and when analyzing the efficient group,it was found that adherence to legislation was not a major factor in achieving efficiency.

建设“无废城市”:比较经验、基本特性与政府角色优化

作为先进、创新、可持续、共建共享的城市管理与发展理念,“无废城市”旨在持续推进城市固体废弃物源头减量与资源化利用,最大限度地降低固体废弃物对城市人居环境的影响。建设“无废城市”,应以高水平的城市固体废弃物综合管理为支点。来自日本、德国与巴西的比较经验说明,城市固体废弃物综合管理具有参与主体的全民性、管理活动的回应性、管理理念的发展性、实现路径的延伸性、管理水平的适当性等显著特征。这要求政府要在城市固体废弃物综合管理改革过程中,不断优化自身角色:明确基本认知,理解治理理念与制度变迁规律;调整治理结构,变“管理对象”为“治理伙伴”;关注系统问题,实现治理系统的兼容与平衡。

循环经济视角下城市固体废物管理的创新策略

本文从循环经济的视角出发,探讨了城市固体废物管理的创新策略。首先对城市废物的多样性、规模与产生关系以及社会经济背景的影响进行了分析。接着深入剖析了废物处理效率不高、资源回收难度大以及废物处理对环境的负面影响等存在的问题。为解决这些问题,本文提出了推动技术创新、强化政策法规支持、促进社会参与和意识提升等创新策略。具体包括先进废物分类技术的研发、社区废物管理的社会参与模式、制定鼓励循环经济的废物管理政策等。通过这些创新策略,本文旨在构建更可持续的城市废物管理体系。

超大型固废综合处理园区资源循环利用体系的构建与应用——以上海老港生态环保基地为例

固废综合处理园区的设立是实现城市固体废弃物“减量化、无害化、资源化”的重要途径。本文以亚洲最大的固废综合处置园区-上海老港生态环保基地为例,对基地内固废末端处置设施以及物质和能量的利用现状进行分析总结,并对未来资源循环利用体系的发展提出设想,以期对其它园区的建设、运营提供参考。

构建城市固废管理的可持续生态设计

本文对城市固废管理作为构建可持续城市环境的核心要素等内容进行了详细探讨。着重分析了城市固废管理在生态设计中的关键作用,并深入探究其对可持续城市环境建设的重要影响。通过对相关文献的综合梳理和对实际案例的深入分析,本文揭示了生态设计在城市固废管理中的多方位应用方法和策略。这些策略旨在促进城市固废管理的可持续发展,从而为城市环境质量的改善和资源的有效利用提供切实可行的途径。这些方法的综合应用将为城市环境未来的可持续发展奠定坚实基础,为居民提供更加清洁、健康的生活空间。

A qualitative assessment of solid waste management in Peleng township in Lobatse,Botswana considering spatial aspects

Even though solid waste management is widely researched,there is scanty literature addressing the influence of physical environmental attributes on solid waste management service provision in informal settlements.The aim of this study was to investigate the nexus between physical infrastructural planning and waste management service.To obtain relevant results,this study used the case study of Peleng township in Botswana.The study relied on empirical data collected from 91 ran-domly selected households.ArcGIS was used for mapping 550 purposively selected households,and for visualization of the physical infrastructure.This study concluded that the community is at the forefront of dealing with waste problems in their settlement.However,their interventions have fallen short of becoming profitable and sustainable due to a failure of the government to integrate solid waste management into mainstream urban development planning.The findings revealed that there is minimal government intervention for improved solid waste management in the area.It recommends that adequate attention must be given to road infrastructure and physical developments in order solid waste management in Peleng,Lobatse.

城市生活垃圾生命周期管理

生命周期评价（ＬＣＡ）是一种全面的环境管理工具，具有潜在的发展前景。它通过对产品、产品系统、工艺活动整个生命周期（包括从原材料的获取、产品制造、使用及废弃物的最终处理）的环境影响及环境改善的机会进行评价。根据国际环境毒理与化学学会（ＳＥＴＡＣ）１９９３年和ＩＳＯ１４０００环境管理体系中关于生命周期评价的技术框架，本文就生命周期评价（ＬＣＡ）在城市生活垃圾管理系统中的作用及管理系统的清单分析、影响评价和改善评价进行研究。

绿色供应链管理:企业经营管理的趋势

在供应链的各个阶段中从原材料获取到产品的制造、运输、使用过程都会产生废弃物 ,对环境造成严重的污染 ,威胁人类的健康和生态系统。为此 ,本文提出了绿色供应链管理的概念 ,并讨论了它的主要内容以及实施绿色供应链管理的应用前景。

南京市城镇化进程中的固废环境管理

在城镇化不断推进的同时环境问题也不断升级,其中"垃圾围城"已成为很多城市土地资源开发与保护的掣肘因素之一。在此以南京市为例,在研究城市化程度与固废污染关系的基础上,分析了南京市固废环境管理存在的问题,并据此提出了城镇化推进过程中关于固体废弃物环境管理的建议。

绿色供应链视角下的物质流过程厨余垃圾减量研究

餐厨垃圾是城市生活垃圾的重要组分,其末端为主的处理方式造成占用土地、环境污染、资源浪费等环境负荷日益严重,其外部性令政府不堪重负。文章基于绿色供应链生命周期管理的思想,对城市垃圾减量过程管理的研究系统进行重新界定并研究食品垃圾减量管理模式。构建了以食品物质流过程环节及其主体感知和行为的影响因素构成的垃圾减量分析和管理框架模型,提出并定义了行为主体对垃圾减量管理的绿色感知强度指数和减量行为绿色强度指数,以北京市餐厨垃圾现状调研数据为例,实证分析垃圾减量绿色感知强度和主体绿色行为之间的互动关系及规律,以此揭示在食品物质流过程从外部管理、基础设施等手段内化为主体的资源减量认知、态度和行为的内在规律,为垃圾减物质化管理及其模式的形成提供科学依据。研究发现:(1)食品物质流垃圾减量管理系统呈现两端环节的净菜和分类行为减量管理薄弱的特点,其中社区居民垃圾分类问题尤为严重,需探讨完善系统化的过程资源减量化管理模式;(2)深层次的环境认知和环保自觉意识以及垃圾减量化行为约束的外部机制薄弱,因此呈现出较高的垃圾分类认识与较低下绿色自觉行为之间存在显著缺口的现象,深化普及绿色价值观和规范行为是推动垃圾减量管理的重点举措;(3)厨余垃圾减量系统是消费、排放、回收以及管理模式协同联动的有机整体,需促进消费、经营、管理模式协同的绿色转变,并建立资源和垃圾减量化管理的短期、长期激励关联机制,逐步建立城市垃圾减量化管理模式。

不同决策偏好下的供应链收益共享契约研究

收益共享契约是实现供应链系统绩效改善或完美协调的一种机制。考虑到零售商与供应商分别具有浪费与缺货厌恶决策偏好,在缺货与浪费厌恶决策偏好的情况下,建立随机需求下由单供应商和单零售商组成的二级供应链的收益共享契约模型,并对模型进行了分析,揭示出供应商和零售商的决策偏好对最优订购量与供应链协作的影响。结果表明:在零售商与供应商具有不同的决策偏好时,只有双方的决策偏好系数满足一定函数关系时,收益共享契约才有可能使得供应链协调,且契约中的参数是双方决策偏好系数的增(减)函数。

重庆工业园区废弃物物流发展问题及政策措施建议

从理论上分析了工业园区废弃物物流系统结构,以典型工业园区为例阐述了重庆工业园区废弃物物流发展现状,分析了固废总量大、产业链培育程度低、再生资源业落后、废弃物处理企业积极性差等发展问题。最后提出推进园区废弃物物流联盟建设、提高园区绿色供应链管理水平、建设园区废弃物耦合系统、加深产业链培育、推进企业固废综合利用、加快再生资源工业园建设等政策措施建议,供园区和企业管理者参考。

具有浪费厌恶决策偏好的供应链收益共享契约模型

收益共享契约是实现供应链系统绩效改善或完美协调的一种机制。考虑了销售商与供应商分别具有浪费厌恶决策偏好情况下,建立了随机需求下由单供应商和单销售商组成的二级供应链的收益共享契约模型,并对模型进行了分析,揭示了供应商和销售商的浪费厌恶决策偏好对最优订购量、收益分享比例及供应链协作的影响。结果表明:在销售商具有浪费厌恶决策偏好时,供应商所提供的批发价格、所获得的收益份额都将随着销售商浪费厌恶则增加而增加;在供应商具有浪费厌恶决策偏好时,供应商所提供的批发价格、所获得的收益份额都将随着自己的浪费厌恶则增加而减小。

城市防灾设施建设供应链管理模式与战略

城市防灾设施建设是一项复杂的系统工程,是典型的上下游供应链长、协调关系多、投资周期长、不确定性和风险程度高的项目。应用供应链管理的理论,结合我国城市防灾设施建设项目的特点,分析了城市防灾设施建设供应链管理的概念与意义,提出了城市防灾设施建设供应链管理的基本模式和特征,并针对我国城市防灾设施建设管理的现状,阐述了我国城市防灾设施建设中政府、有关企业与社会机构等方面实施供应链管理的战略任务。

京津冀工农城固废跨产业跨区域协同利用解决方案研究

京津冀地区人口密度大,重化工业发达,固废产量大,资源环境问题突出。区域内固体废物处理处置存在统计数据信息口径不一、固废资源利用率低、固废种类多且协同不足等问题,极大阻碍了京津冀协同一体化建设进程的推进。本文依据固废无害化、减量化、资源化的原则与目标,分析了京津冀地区涉及工业、农业、城市等多产业固体废物协同利用的可行性,提出了固废跨产业跨区域协同利用的整体思路和解决方案。分析研究认为,应以京津冀地区固废数据库建立为基础,依托固废大比例协同利用、高附加值产品开发、工业材料化应用、烟气超低排放等工艺技术和装置开发,形成固废协同处置集成示范基地,优化其经济运行指标参数,研究新的商业运行模式,加速产业推进。另外,社会各界还应立足于京津冀一体化的宏观视角,积极制定并推行新的标准规范,形成统筹管理体系,实现京津冀工农城固废跨产业跨区域协同利用,解决京津冀地区多产业、多区域的固废处理处置难题。

论城市固体废弃物的物流化管理

首先,摈弃传统的城市固体废弃物终端处理模式,改为从源头做主动处理。其次,建立统一协调的城市固体废弃物回收处理物流体系。政府在城市废弃物物流管理中应发挥更为主动的作用。

基于建筑供应链的全面建筑废物管理

在分析我国建筑废物管理的现状、存在的问题,和借鉴国外建筑废物管理经验的基础上,从建筑供应链上各个节点出发,结合建筑生产工业化的趋势,提出全面建筑废物管理的方法。既保护环境、促进可持续发展又提高了建筑业的经济效益。