多重恶臭污染源对环境的影响评估分析

本项研究以某焦化厂及周围的垃圾堆放场、排污河等多重污染源对附近的居住区的影响为例，根据各污染源与居住区的位置关系在不同风向条件下进行采样分析，并对污染源排放废气的特征污染物进行监测，评估了各污染源对环境的影响程度。     

农户兼业特征及其行为的影响研究——基于三峡库区715户农户的实证调查

运用Logistic模型分析三峡库区农户的兼业特征及其行为的影响因素。结果表明,家庭劳动力数量、家庭成员是否有专业技能、承包地是否流转、家庭总收入和家庭非农收入对三峡库区农户的兼业程度有显著的正影响;户主年龄、人均耕地面积和承包地距离公路的远近对三峡库区农户的兼业程度有显著的负影响。据此,提出加强对农户成员教育和非农职业技能培训,大力开展土地整理和加快农村公路建设,培育合理科学的土地流转市场等建议。     

我国城市垃圾填埋场降解速率的分析

对北京海淀区若干典型填埋场中城市垃圾的降解速率进行了实测〔1〕,指出当前垃圾堆放场的稳定周期在 1 0年左右。通过模拟实验以及理论分析 ,指出促进降解的原因在于垃圾自身组分和若干填埋条件的差异。文章并对我国未来填埋场中垃圾的降解速率提出了预测见解。     

三峡库区旅游资源评价及可持续发展研究

通过对三峡库区旅游资源的定性、定量评价，本文论述了把三峡库区建成全国最大旅游中心的可能性，提出了促进三峡库区旅游业可持续发展的对策和建议     

垃圾填埋场渗滤液回流技术研究进展

垃圾填埋场渗滤液回流能有效降低渗滤液中污染物的浓度，提高填埋场稳定化程度，具有广泛的应用前景。本文综述了国内外学者对该技术的研究情况，包括技术特点及相关机理、渗滤液特性研究及回流效果的影响因素，指出了该技术现存的不足之处和尚待解决的理论和技术问题。     

破解城市垃圾焚烧厂“选址难”的良方

<正>我国每年产生近1.5亿吨城市垃圾,目前国内已有2/3的大中城市陷入"垃圾围城"的困境。以北京、上海、深圳为例,北京每天产生约1.8万吨生活垃圾,面积过千平米的垃圾堆放场和处理厂约500多个;上海每天产生的垃圾量超过北京,达2.2万吨;深圳日产垃圾逾1.78万吨。垃圾围城问题,需要系统研究,形成解决方案。目前,各地陆续在建垃圾焚烧厂,但均遇到选址难的问题,亟需破解。城市规模不断扩张,城市     

论我国中小城市的生活垃圾优化管理

根据我国中小城市生活垃圾特点，提出适宜于我国中小城市生活垃圾管理的区域优化、长期优化和综合优化处理基本原则，并以此确定我国中小城市生活垃圾优化管理程序，为我国中小城市生活垃圾管理提供科学方法。     

城市垃圾分类与居民地方认同研究

垃圾无害化处理是环境治理不可或缺的一个环节，它不仅关系城市居民生存环境的健康程度，更直接影响公众对政府环境治理政策和治理效果的认知与评价。本文运用环境心理学理论，对折射出居民环境认知、个人偏好、预期目标和情感联系的地方认同进行问卷调查，发现社区居民对城市垃圾治理成效的评价及其对政府垃圾治理能力的评价与其地方认同呈正相关关系，同时，居民对政府关于垃圾治理法律法规的认同也能增强其地方认同感。本文建议，未来关于地方认同的研究需要聚焦于城市环境治理政策的传播效果，总结和归纳城市居民对环境治理成效的归因模式与其地方认同之间的交叉关系。     

论三峡库区城市污水、垃圾处理市场化

论述了用市场化模式解决三峡库区城市污水处理场和垃圾处理场的建设和运营问题，并提出了市场化的总体架构。     

深圳下坪填埋场渗滤液产生量预测研究

对垃圾填埋渗滤液产生量预测模型进行了比较，选择经验－合理式模型作为填埋场渗滤液产生量的预测模型。综合下坪垃圾填埋场不同汇水面积、降雨量和渗滤液量的现场实测数据，采用线性回归确定了模型参数，通过模型预测渗滤液产生量与现场实测渗滤液产生量的对比分析了本模型的精度和可靠性，从而为填埋场渗滤液产生量的预测及收集处理系统的设计、管理提供科学依据。     

Economic comparison of recycling over-ordered fresh concrete: A case study approach

Recycling of construction material helps save the limited landfill space. Among various types of materials, concrete waste accounts of about 50% of the total waste generation. Current off-site practices for ready mixed concrete batching plant generate a significant quantity of fresh concrete waste through over-order from construction sites. The use of concrete reclaimer is one of the methods to reclaim these concrete wastes, which separates coarse aggregate, sand and cement from fresh concrete. Although there are some concrete producers in Hong Kong providing concrete reclaimers in their plants, they are only used to flush and dilute the cement slurry from the concrete, which will still be ultimately send all to dumping areas. The reluctance of most concrete producers in reclaiming aggregate from the concrete waste is due to its high cost of treatment and lack of space around the plant. Therefore, this paper puts forth a scheme of economical considerations in recycling over-ordered concrete by concrete reclaimer. A comparative study on costs and benefits between the current practices and the proposed recycling plan is examined. The study shows that the costs of the current practices in dumping over-ordered fresh concrete waste to landfill areas are double that of the proposed aggregate recycling plan. Therefore, the adoption of concrete reclaimer in recycling the over-ordered fresh concrete can provide a cost-effective method for the construction industry and help saving the environment.     

A fuzzy analytic network process for multi-criteria evaluation of contaminated site remedial countermeasures

The Analytic Network Process (ANP) has been proposed to incorporate interdependence and feedback effect in the prioritization of remedial countermeasures using a hierarchical network decision model, but this approach seems to be incapable of capturing the vagueness and fuzziness during value judgment elicitation. The aim of this paper is to present an evaluation method using a fuzzy ANP (FANP) approach to address this shortcoming. Triangular fuzzy numbers (TFN) and their degree of fuzziness are used in the semantic scale as human judgment expressed in natural language is most often vague and fuzzy. The method employs the alpha-cuts, interval arithmetic and optimism index to transform the fuzzy comparative judgment matrix into set of crisp matrices, and then calculates the desired priorities using the eigenvector method. A numerical example, which was drawn from a real-life case study of an uncontrolled landfill in Japan, is presented to demonstrate the process. Results from the sensitivity analysis describe how the fuzziness in judgment could affect the solution robustness of the prioritization method. The proposed FANP approach therefore could effectively deal with the uncertain judgment inherent in the decision making process and derive the meaningful priorities explicitly from a complex decision structure in the evaluation of contaminated site remedial countermeasures.     

Spatial and temporal distribution of illegal dumping sites in the nature protected area: the Ojców National Park,Poland

The existence of illegal dumping continues to be a worldwide problem, even in nature protected areas, and its distribution is not random. An understanding of the distribution of illegal dumping sites is crucial for the enhancement of effective waste management systems. Therefore, this study aims at a better understanding of spatial and temporal changes to illegal dumping sites in a nature protected area (the Ojców National Park) from 1994 to 2016. The most important spatial factors that control the distribution of illegal dumping sites were the distance from roads and from the field-forest edge. In the last two decades, the number of small dumping sites has increased, whereas the number of large illegal dumping sites has decreased. Moreover, this study presents a model of the potential occurrence of illegal dumping sites, which indicates places that should be under the control of the national park and of local authorities.     

回灌型准好氧填埋场渗滤液中COD浓度的预测模型探讨

基于进行的室内模拟试验，推导了回灌型准好氧填埋场COD浓度计算模型，并通过模拟试验结果确定了模型参数。结果表明，模型的相关系数为0．91，该模型可用于该类填埋场COD浓度的预测。本研究可为回灌型准好氧填埋场的设计提供依据。     

Odour-impact assessment around a landfill site from weather-type classification, complaint inventory and numerical simulation

Gases released from landfill sites into the atmosphere have the potential to cause olfactory nuisances within the surrounding communities. Landfill sites are often located over complex topography for convenience mainly related to waste disposal and environmental masking. Dispersion of odours is strongly conditioned by local atmospheric dynamics. Assessment of odour impacts needs to take into account the variability of local atmospheric dynamics. In this study, we discuss a method to assess odour impacts around a landfill site located over complex terrain in order to provide information to be used subsequently to identify management strategies to reduce olfactory nuisances in the residential neighbourhoods. A weather-type classification is defined in order to identify meteorological conditions under which olfactory nuisances are to be expected. A non-steady state Gaussian model and a full-physics meteorological model are used to predict olfactory nuisances, for both the winter and summer scenarios that lead to the majority of complaints in neighbourhoods surrounding the landfill site. Simulating representative scenarios rather than full years make a high resolution simulation of local atmospheric dynamics in space and time possible. Results underline the key role of local atmospheric dynamics in driving the dispersion of odours. The odour concentration simulated by the full-physics meteorological model is combined with the density of the population in order to calculate an average population exposure for the two scenarios. Results of this study are expected to provide helpful information to develop technical solutions for an effective management of landfill operations, which would reduce odour impacts within the surrounding communities.     

Landfill site selection using spatial information technologies and AHP: A case study in Beijing,China

Site selection is an important and necessary issue for waste management in fast-growing regions. Because of the complexity of waste management systems, the selection of the appropriate solid waste landfill site requires consideration of multiple alternative solutions and evaluation criteria. Based on actual conditions of the study area, we considered economic factors, calculated criteria weights using the analytical hierarchy process (AHP), and built a hierarchy model for solving the solid waste landfill site-selection problem in Beijing, China. A geographic information system (GIS) was used to manipulate and present spatial data. All maps are graded from 1 (lowest suitability) to 5 (highest suitability) using spatial information technologies. The candidate sites were determined by aggregation based on the criteria weights. The candidate sites are divided by ‘best’, ‘good’ and ‘unsuitable’ landfill areas. Best landfill areas represent optimal sites; good landfill areas can be used as back-up candidate sites. Our work offers a siting methodology and provides essential support for decision-makers in the assessment of waste management problems in Beijing and other rapidly developing cities in developing countries.     

填埋场内水分运移过程双场耦合模型的探讨

基于多孔介质渗流力学和热力学理论，从填埋场内非等温的角度，理论上分析了场内垃圾含水率的分布与温度变化之间相互作用的机理，建立了垃圾填埋场内水分运移过程的双场耦合模型（三维），并提出模型的求解方法。为研究填埋场内水分的时空分布规律提供理论依据。     

基于碟管式反渗透处理垃圾渗滤液的应用分析

为了在达标排放的基础上降低建设规模为Ⅲ类、Ⅳ类型(中小型)垃圾填埋场处理垃圾渗滤液的人工及成本投入,提高系统稳定性,分析了泗县垃圾填埋场2018年3~12月渗滤液处理的运行状况。通过采用“预处理+两级碟管式反渗透+吹脱”的高度自动化工艺对垃圾渗滤液进行处理。结果表明:使用该系统处理后出水COD_Cr浓度低于26mg/L,NH3-N浓度低于15mg/L,各项出水指标均满足排放标准的要求,系统自动化程度高、稳定性好、且工程总投入834万元、运行期间处理每吨渗滤液花费为56.18元,成本较低适用性好。     

A model for cost-benefit analysis of construction and demolition waste management throughout the waste chain

Economic instrument is indubitably perceived as effective for encouraging or forcing contractors to conduct environmentally friendly construction practices. Previous studies in relation to this topic mainly put emphasis on economic analysis of construction and demolition (C&D) waste management from a static point of view, which failed to consider its dynamics nature by integrating all essential activities throughout the waste chain. This paper is thus intended to highlight the dynamics and interrelationships of C&D waste management practices and analyze the cost-benefit of this process using a system dynamics approach. Data related to concrete and aggregate of a construction project in Shenzhen was collected for the application of the proposed model. The findings reveal that net benefits from conducting C&D waste management will occur, but a higher landfill charge will lead to a higher net benefit, as well as an earlier realization of the net benefit. In addition, the general public under a higher landfill charge will suffer from a higher environmental cost caused by illegal dumping. The simulation results also suggest that current regulation in Shenzhen should be promoted to facilitate a dramatic increase in net benefit from the implementation of C&D waste management. This research is of value in facilitating better understanding on the dynamics of C&D waste management activities throughout the waste chain, as well as providing a tool for simulating the cost-benefit of C&D waste management practices over the project duration.     

A generic comparison of the airborne risks to human health from landfill and incinerator disposal of municipal solid waste

A comparison of the potential risks to human health from municipal solid waste (MSW) incineration and landfill on a generic basis is attempted. For this purpose a 'worst case' approach is adopted and a number of assumptions regarding the size and activities of each waste disposal method are made. The airborne pollutants measured for an incinerator are different from those for a landfill with or without gas collection. However, based on the available information it appears that as far as airborne pollution is concerned, landfill sites without gas collection pose a potentially higher generic risk to human health than MSW incinerators performing to Environmental Agency (UK) standards. This analysis cannot be used to replace specific evaluations for a particular incinerator or a landfill site because local conditions can have a very large impact on the magnitude of risks involved.