盘锦市发展生态农业循环经济模式探讨

循环经济在发达国家已取得成功经验.我国则更多地停留在概念层次上。新世纪之后解决农业面源污染,增加农民收入面临压力更大,原因是农业生产施用的农药、化肥太多,粮食、疏莱残毒超过国际卫生、环保标准。不能走出国门,欲想解决这一问题,发展农业循环经济模式、生产无害化食品,是保持生态环境、改变农村落后面貌必然的战略选择。     

发展循环经济 保护生态环境——以洛阳生生乳业有限公司农业循环经济发展模式为例

以洛阳生生乳业开展的循环经济模式为例,进行了产业模式介绍,分析了发展循环经济与环境保护的关系,进行了经济效益、社会效益、及环境效益的分析。     

工业生态系统边界障碍问题研究

工业生态系统边界障碍问题是工业生态和循环经济研究领域的重要问题。目前学术界对这一问题尚未开展相关研究。结合我国当前循环经济发展所面临的向更大范围扩展的任务,对工业生态系统进行了定义并对工业生态系统边界的研究状况进行了归纳分析。在此基础上,提出并定义了工业生态系统的边界障碍问题,建立了工业生态系统边界障碍问题的研究框架,指出了开展工业生态系统边界障碍问题研究的内容。     

Economics analysis of food waste treatment in China and its influencing factors

• Economics of food waste treatment projects at 29 pilot cities in China was examined. • Roles of location, population size, processing technique, and income were studied. • Economic benefits were limited with a profit to cost ratio of 0.08±0.37. • Service population size affects construction economics significantly (P = 0.016). • Choice of food waste processing technique affects operating economics notably. This study examines the economic benefits of food waste treatment projects in China and factors affecting them. National-level pilot projects for food waste treatment located in 29 cities were selected as samples. The economics of food waste recycling from the investors’ perspective, in terms of investment during the construction phase and cost and benefit during the operation phase, was assessed. Results indicate that the average tonnage investment of food waste treatment projects was RMB 700.0±188.9 thousand yuan, with a profit to cost ratio of 0.08±0.37. This ratio increased to 0.95±0.57 following the application of government subsidies. It highlights the limited economic benefits of food waste treatment facilities, which rely on government subsidies to maintain their operations in China. Further analysis using a multi-factor analysis model revealed that regional location, service population size, processing techniques, and urban income exerted varying impacts on the economy of food waste treatment. Population size exerted the highest impact (P = 0.016) during the construction stage, and processing techniques notably influenced the project economy during the operation stage. The study highlights the need to prioritize service population size and processing techniques during economic decision-making and management of food waste recycling projects. The results of this study can serve as a valuable practical reference for guiding future policies regarding food waste treatment and related planning.     

Gas dispersion risk analysis of safety gap effect on the innovating FLNG vessel with a cylindrical platform

While the effect of the safety gap on explosions is well known, little has been carried out to evaluate the effect of the safety gap on dispersion of gas releases, this paper evaluates the effect of safety gap on gas dispersion for a cylindrical Floating Liquefied Natural Gas (FLNG) vessel. The realistic ship-shaped and circular FLNG platforms are established and used for the detailed CFD based analysis; rather than the structural and hydrodynamics advantages of mobility, stability and cost efficiency etc., this study aims to investigate the safety of gas dispersion on the cylindrical FLNG and compare the safety gap effects on different configurations. A series of different safety gap configurations are evaluated for gas dispersion occurring in near field for the traditional FLNG while both near field and far field gas dispersion simulations are conducted on the cylindrical one. The overall results indicate that the safety gap is effective in reducing the gas cloud size in both FLNG configurations, however, when it comes to the gas dispersion in the far field against the leakage point, the safety gap increases the gas cloud size in the cylindrical FLNG vessel on the contrary.     

Win-Win: Anthropogenic circularity for metal criticality and carbon neutrality

● Anthropogenic circularity science is an emerging interdisciplinary field. ● Anthropogenic circularity was one effective strategy against metal criticality. ● Carbon neutrality is becoming the new industry paradigm around the world. ● Growing circularity could potentially minimize the CO₂ emission. Resource depletion and environmental degradation have fueled a burgeoning discipline of anthropogenic circularity since the 2010s. It generally consists of waste reuse, remanufacturing, recycling, and recovery. Circular economy and “zero-waste” cities are sweeping the globe in their current practices to address the world’s grand concerns linked to resources, the environment, and industry. Meanwhile, metal criticality and carbon neutrality, which have become increasingly popular in recent years, denote the material's feature and state, respectively. The goal of this article is to determine how circularity, criticality, and neutrality are related. Upscale anthropogenic circularity has the potential to expand the metal supply and, as a result, reduce metal criticality. China barely accomplished 15 % of its potential emission reduction by recycling iron, copper, and aluminum. Anthropogenic circularity has a lot of room to achieve a win-win objective, which is to reduce metal criticality while also achieving carbon neutrality in a near closed-loop cycle. Major barriers or challenges for conducting anthropogenic circularity are deriving from the inadequacy of life-cycle insight governance and the emergence of anthropogenic circularity discipline. Material flow analysis and life cycle assessment are the central methodologies to identify the hidden problems. Mineral processing and smelting, as well as end-of-life management, are indicated as critical priority areas for enhancing anthropogenic circularity.     

沈阳市铁西新区装备制造业循环经济建设与研究

为了实现装备制造业的生态化发展,必须同时在企业内部实施生态设计及生态化管理,从源头减少资源消耗;以骨干企业为支撑,逐渐完善与钢铁产业群、铸锻产业群及表面处理中心间的产品代谢链条,形成稳定的产品供应关系和产业群,扩展行业间的横向耦合,构建稳定的产品代谢和产业链。     

循环经济发展评价的生态效率测算模型及应用

生态效率是基于可持续发展的思想,鉴于循环经济发展和实际环境的需求,通过构建循环经济发展评价的生态效率测算模型,针对循环经济中资源和环境2个重要方面,选择实例进行模型的应用。所选择研究对象经过测算,生态效率在"十一五"期间呈现波动上升,在5年时间增长了1.1倍,但仍处于末端治理为主的循环经济发展阶段,较为客观地反映了当地循环经济的发展轨迹。通过相关分析和说明,为循环经济发展评价提供生态效率分析这一方案选择。     

生态化改造高新技术产业区与传统产业区的方法比较

为了发展循环经济,我国积极推进生态工业园的建设。已建的高新技术产业区和传统产业区都面临生态化改造的需求。由于这两类产业区的特点不同,应根据各自的特点确定生态化改造的侧重点。本文比较分析了我国高新技术产业区与传统产业区生态化改造方法的差异。     

建立循环经济行政激励机制的探讨

循环经济作为一种根本不同于传统经济模式的新模式,对政府的调整机制提出了不同于传统模式的新要求。本文通过讨论在发展循环经济中建立行政激励机制的必要性,行政激励行为的性质以及基本原则,重点探讨合理选择激励工具、行政激励机制的程序制约和救济等问题。