英国废弃烹调油再生利用现状分析

以英国废弃烹调油的回收、处理和再生利用的产品为主线,结合与其相关的政策、法规及有效激励方法在废弃烹调油再生利用管理过程中的作用,详细介绍了英国废弃烹调油再生利用的管理现状,以期对我国废弃烹调油及其他废弃物的循环经济实践提供具体的参考案例。     

废弃混凝土的开发利用

混凝土仍将是21世纪一种应用最广泛的建筑材料,但越来越多的拆除建筑物会产生大量的废弃混凝土块,既带来环境污染,又造成资源浪费.搞好废旧混凝土的开发利用,具有明显的环境效益和经济效益.     

我国废弃电子线路板资源化再生利用技术现状与展望

随着电子行业的迅猛发展,废弃电子线路板的处理和利用成为各方关注的热点。废弃电子线路板处理不好将成为一大环境污染问题,而利用好了又可变废为宝,产生巨大的价值。阐述我国进行废弃电子线路板资源化再生利用的重要性和紧迫性,介绍废弃电子线路板处理利用技术的研究现状,并时其研究重点和发展趋势做出展望。     

我国废弃木材综合利用初步产业化

<正>2010年1月15日,在广东佛山召开了"‘十一五’国家重大科技支撑项目课题‘农林剩余物制造绿色建材新产品开发’年度总结暨‘废弃木质材料循环利用与低碳经济’高层论坛",经过专家多年联合攻关,我国废弃木质材料综合利用研     

煤矿废弃资源化利用的试验研究

近年来，煤矸石和矿井水资源化已经成为综合利用的研究焦点，是煤矿迫切需要再生利用的两大自然资源。煤矸石和矿井水不再仅仅被视为一种工业废弃物，而是可供利用的资源，其中煤矸石以Al2O3和SiO2为主，含有丰富的铝、硅资源和大量可供利用的其它矿物；矿井水是宝贵的水资源，对于一些山区或北方缺水的治理过程中，普遍存在资源利用不充分，还存在严重的二次污染，制约了煤矸石和矿井水的资源化再生利用。     

循环经济视阈下兰州市家庭废弃药品回收模式创新研究

结合对兰州市居民参与家庭废弃药品回收情况进行的调研结果,分析了兰州市居民处理家庭废弃药品和参与回收活动的现状,从中找到在循环经济视阈下兰州市居民参与家庭废弃药品回收中存在的问题,并基于此提出适合兰州市家庭废弃药品回收的有效模式,如"政府机构+社区卫生服务中心回收+激励机制"和"政府机构+固定药店+激励机制"的模式等,进...     

电子废弃物的再生利用必须走产业化之路

在介绍目前我国电子废弃物再生利用的现状和存在问题的基础上,阐述其走产业化之路的必然性和发展方向,最后提出了实现产业化应注意的几个问题.     

废旧混凝土资源化再生利用技术

试验研究了再生混凝土的基本性质,讨论了废旧混凝土资源化再生利用技术的可行性和有效途径.     

抓好废弃电器电子产品回收管理推进资源再生利用产业化

为了贯彻落实党的十七届五中全会精神,加快建设资源节约型和环境友好型社会,大力发展循环经济,完善再生资源回收体系,推进资源再生利用的产业化,配合国务院颁布的<废弃电器电子产品回收处理管理条例>的实施,商务部在深入调查研究的基础上,广泛征求各方面的意见,并与有关部门充分协商,制定了<废弃电器电子产品回收管理办法>(以下简称<办法>).下面我就<办法>谈3点个人意见,供大家参考.     

大连实施垃圾分类回收积极推进垃圾资源再生利用产业化

大连在全国率先创建新型垃圾分类回收体系,实现废旧物资回收与垃圾分类回收在同一个垃圾分类回收站内完成,有利于各类废物资源集中收集、分类回收、资源化利用或处理,彻底改革了我国传统落后的废旧物资回收与垃圾收集处理方式,为废旧物资与垃圾资源再生与循环利用提供了保障条件,也为垃圾处理产业化奠定了坚实的基础。     

Innovative process routes for a high-quality concrete recycling

This study presents alternative methods for the processing of concrete waste. The mechanical stresses needed for the embrittlement of the mortar matrix and further selective crushing of concrete were generated by either electric impulses or microwaves heating. Tests were carried out on lab-made concrete samples representative of concrete waste from concrete mixer trucks and on concrete waste collected on a French demolition site. The results obtained so far show that both techniques can be used to weaken concrete samples and to enhance aggregate selective liberation (that is the production of cement paste-free aggregates) during crushing and grinding. Electric pulses treatment seems to appear more efficient, more robust and less energy consuming (1–3 kW h t^?1) than microwave treatment (10–40 kW h t^?1) but it can only be applied on samples in water leading to a major drawback for recycling aggregates or cement paste in the cement production process.     

Cross-cultural comparison of concrete recycling decision-making and implementation in construction industry

Waste management is pressing very hard with alarming signals in construction industry. Concrete waste constituents major proportions of construction and demolition waste of 81% in Australia. To minimize concrete waste generated from construction activities, recycling concrete waste is one of the best methods to conserve the environment. This paper investigates concrete recycling implementation in construction. Japan is a leading country in recycling concrete waste, which has been implementing 98% recycling and using it for structural concrete applications. Hong Kong is developing concrete recycling programs for high-grade applications. Australia is making relatively slow progress in implementing concrete recycling in construction. Therefore, empirical studies in Australia, Hong Kong, and Japan were selected in this paper. A questionnaire survey and structured interviews were conducted. Power spectrum was used for analysis. It was found that “increasing overall business competitiveness and strategic business opportunities” was considered as the major benefit for concrete recycling from Hong Kong and Japanese respondents, while “rising concrete recycling awareness such as selecting suitable resources, techniques and training and compliance with regulations” was considered as the major benefit from Australian respondents. However, “lack of clients’ support”, “increase in management cost” and “increase in documentation workload, such as working documents, procedures and tools” were the major difficulties encountered from Australian, Hong Kong, and Japanese respondents, respectively. To improve the existing implementation, “inclusion of concrete recycling evaluation in tender appraisal” and “defining clear legal evaluation of concrete recycling” were major recommendations for Australian and Hong Kong, and Japanese respondents, respectively.     

中国失效镍钴资源再循环的战略研究

以全球战略资源的镍钴金属再循环作为研究重点,特别是在再生资源领域里的失效镍钴资源,它好比一座潜伏的城市矿山.从资源品位、技术路线、环境控制等多个角度对其进行分析研究后发现,从战略角度调整宏观政策,将失效镍钴资源作为一种战略储备资源,尽快推动国内外二次开采的科学发展和再循环步伐十分必要.     

Sustainability of recycling plastic waste as fibers for concrete: a review

Journal of Material Cycles and Waste Management - Plastic waste management is of global concern while construction industry keeps searching for innovations to become more sustainable. In this...     

多功能再生混凝土球型路障试验研究

针对现行交通路障存在的问题,在前期试验研究的基础上,研究开发了多功能再生混凝土球型路障,不但可有效利用废弃混凝土、节约天然石材资源,还具备防撞击、夜间可视性好等安全功能,具有良好的社会效益、环境效益和经济效益。     

再生资源产业回收模式比较

回收网络与回收模式的选择对再生资源企业非常关键。在实践中,存在分散型、层级管理、柔性管理、点对点及承包协议等多种不同的回收模式,而且各自具备不同的特点。基于对不同回收模式的比较分析,针对每种模式分别提出以下建议:以政策规范分散回收行为、以宣传推广柔性管理模式、以共生提高层级网络效率、以信息平台扩大点对点模式、以市场运行承包协议模式。     

北京废旧资源回收利用产业发展实践研究

废旧资源回收利用具有显著的资源节约和环境友好特性,发展废旧资源回收利用产业已成为实践循环经济,促进节能减排的重要举措.通过多种途径调研了北京市废旧资源回收利用产业若干重点企业,凝练了近年来北京市废旧资源回收利用产业在产业发展规模、科技支撑水平、政府支持强度以及节能减排效益等多方面取得的发展成效,结合首都北京自身特点和发展要求,分析了发展中存在的若干不足,提出需要在提高产业集聚、完善回收体系以及加强系统激励等方面有针对性地采取相应对策,以促进其可持续发展.     

Assessment of the recycling potential of fresh concrete waste using a factorial design of experiments

Recycling of industrial wastes and by-products can help reduce the cost of waste treatment prior to disposal and eventually preserve natural resources and energy. To assess the recycling potential of a given waste, it is important to select a tool capable of giving clear indications either way, with the least time and work consumption, as is the case of modelling the system properties using the results obtained from statistical design of experiments. In this work, the aggregate reclaimed from the mud that results from washout and cleaning operations of fresh concrete mixer trucks (fresh concrete waste, FCW) was recycled into new concrete with various water/cement ratios, as replacement of natural fine aggregates. A 3² factorial design of experiments was used to model fresh concrete consistency index and hardened concrete water absorption and 7- and 28-day compressive strength, as functions of FCW content and water/cement ratio, and the resulting regression equations and contour plots were validated with confirmation experiments. The results showed that the fresh concrete workability worsened with the increase in FCW content but the water absorption (5–10 wt.%), 7-day compressive strength (26–36 MPa) and 28-day compressive strength (32–44 MPa) remained within the specified ranges, thus demonstrating that the aggregate reclaimed from FCW can be recycled into new concrete mixtures with lower natural aggregate content.