废硅藻土回收应用于污泥深度脱水处理

硅藻土作为助滤剂被大量使用,用后废弃硅藻土液容易变质发臭并严重污染环境,桂林市某啤酒生产企业对废硅藻土液进行回收,并作为调理剂应用到卧式弹簧压榨污泥深度脱水处理系统中,增强污泥絮凝调理效果,促进污泥更好地压滤和压榨脱水,既解决废硅藻土难处理问题,又达到以废、治废变废为宝和降低污泥脱水成本的目的。     

海南4年内将形成回收拆解体系

由海南省环科院承担的《海南省废弃电器电子产品处理发展规划(2011—2015)》(以下简称《规划》)通过专家评审。《规划》提出,到2015年海南省要基本形成覆盖全省的多元化废弃电器电子产品回收体系和规范化拆解处理体系,全面提高废弃电器电子产品无害化处置和资源化利用水平。据介绍,该《规划》围绕促进海南省废弃电器电子产品处理行业健康发展的主题,全面分析了全省废弃电器电子产品回收处理现状及存在的主要问题;以主要家电社会保有量为基础,预测"十二五"期间废     

信息与动态

从废灯泡中回收稀土金属Chemical Engineering,2010,118(2):14截至目前,废弃的节能灯泡都是由综合利用公司处理,回收玻璃、金属、塑料以及汞等不同的组分。     

专利资讯

利用陶瓷抛光砖废料制备硅酸盐水泥的方法,废弃混凝土活化再生水泥技术,废弃混凝土回收方法及其装置和回收的胶凝材料的用途,铸造废砂生产混凝土砖的配方及其生产方法。     

关于发布《废弃电器电子产品拆解处理情况审核工作指南(2019年版)》的公告 发改产业[2019]967号

<正>为贯彻落实《废弃电器电子产品回收处理管理条例》和《废弃电器电子产品基金征收使用管理办法》,促进废弃电器电子产品妥善回收处理,规范和指导废弃电器电子产品拆解处理情况审核工作,保障基金使用安全,我部制定了《废弃电器电子产品拆解处理情况审核工作指南(2019年版)》(以下简称《审核指南(2019年版)》),现予公布,自2019年10月1日起施行。《废弃电器电子产品拆解处理情况审核工作指南(2015年版)》(环境保护部公告2015年第33号)同时废止。     

生活垃圾分类背景下对广州市废玻璃回收利用的思考

废玻璃是一种载能节能、低碳环保、可重复利用和再生利用的再生资源,广州市通过补贴政策、两网融合等手段,促进废玻璃回收利用,随着生活垃圾分类纵深推进,为了进一步提高废玻璃回收利用,从废玻璃回收利用现状入手,对比了北京、上海生活垃圾中废弃玻璃的占比情况,针对目前存在问题,提出废玻璃回收利用分析与建议.     

废旧家电处理基金管理办法或公布 下半年买家电可能要交回收费

据中国再生资源回收利用协会电子废弃物回收处理分会秘书长唐爱军近日透露,与《废弃电器电子产品回收处理管理条例》配套的《废弃电器电子产品处理基金的征收使用管理办法》（以下简称《管理办法》）,将于2012年4月初公布,并有望干2012年7月1日开始实施。     

中国循环经济协会赴天津市调研电废产业 推动我国废物回收和处理政策的务实变革

正中国循环经济协会高度重视电废企业的生存发展和应对疫情的工作,2020年3月初,协会公开征集了电废产业相关单位的意见和建议;在此基础上,协会向国家发改委、生态环境部、工信部、财政部提交了《关于呈送〈应对疫情实现我国电废产业高质量发展的政策报告〉的函》。根据近期国家部委相关司局的指示,为破解电废产业发展瓶颈难题,中国循环经济协会党支部书记、会长助理原庆丹率队于2020年5月13—14日,赴天津市调研电废处理企业对绩效评价制度的意见,以及鼓励和规范电废回收产业的政策建议。协会废弃电器电子产品回收处理专委会秘书长王军陪同调研。     

阴极射线管荧光粉回收利用现状及技术

我国是电视机的生产大国和废弃大国。2009年我国家电"以旧换新"政策实施后,大量废弃阴极射线管(CRT)电视机进入正规的回收拆解处理渠道,使得废弃CRT荧光粉的回收处理问题越发显现。对CRT荧光粉的化学组成、制备方法、回收处理及处置现状等进行综述,借鉴现有对废弃荧光灯中荧光粉的稀土金属回收利用技术的研究,探讨废弃CRT荧光粉处理处置的未来发展趋势。     

团体标准《废弃电器电子产品回收规范》实施指引解读

废弃电器电子产品回收体系的不完善,行业内规范的回收管理标准的缺失,制约着我国废弃电器电子产品回收处理产业的健康发展.中国再生资源回收利用协会等单位联合编制的《废弃电器电子产品回收规范》为废弃电器电子产品规范回收提供了参考依据,为废弃电器电子产品回收监管提供了技术支撑,对推动废弃电器电子产品回收处理产业规范健康发展具有指...     

Synthesis and Characterization of Polyols and Polyurethane Foams from PET Waste and Crude Glycerol

In this study, polyethylene terephthalate (PET) waste from post-consumer soft-drink bottles and crude glycerol from the biodiesel industry were used for the preparation of polyols and polyurethane foams. PET waste was firstly depolymerized by the glycolysis of diethylene glycol. The glycolyzed PET oligomers were then reacted with crude glycerol at different weight ratios to produce polyols via a series of reactions, such as esterification, transesterification, condensation, and polycondensation. The polyols were characterized by titration, viscometry, gel permeation chromatography (GPC), and differential scanning calorimetry. Subsequently, polyurethane (PU) foams were made via the reaction between the produced polyols and polymeric methylene-4,4′-diphenyl diisocyanate and were characterized by mechanical testing, scanning electron microscopy, and thermogravimetric analysis. Polyols from crude glycerol and their PU foams were also prepared to compare properties with those of polyols and PU foams from PET and crude glycerol. The influence of aromatic segments existing in glycolyzed PET and glycerol content on the properties of the polyols and PU foams was investigated. It was found that aromatic segments of polyols from glycolyzed PET helped increase their molecular weights and improve thermal stability of PU foams, while high glycerol content in polyols increased the hydroxyl number of polyols and the density and compressive strength of PU foams.     

电厂建设运行中的水土流失预测与水土保持设计

在燃煤电厂建设运行的同时,将引起一系列的水土流失问题.以四川国电金堂电厂二期扩建工程为例,简要说明项目区水土流失预测的内容和方法,并在其基础上对可能产生的水土流失和危害进行了分析,同时介绍了建设期和运行期采取的综合防治措施,为类似工程的水土保持提供借鉴.     

磷对环境的污染及防治对策

我国水体富营养化严重，其主要控制因子是磷。在分析磷污染的污染状况，污染源的基础上，介绍了防治对策，采用低磷循环冷却水处理剂，减少磷排放，是防止工业磷污染的有效方法。     

Pyrolysis of virgin and waste polypropylene and its mixtures with waste polyethylene and polystyrene

A comparison of waste and virgin polypropylene (PP) plastics under slow pyrolysis conditions is presented. Moreover, mixtures of waste PP with wastes of polyethylene (PE) and polystyrene (PS) were pyrolyzed under the same operating conditions. Not only the impact of waste on degradation products but also impacts of the variations in the mixing ratio were investigated. The thermogravimetric weight loss curves and their derivatives of virgin and waste PP showed differences due to the impurities which are dirt and food residues. The liquid yield distribution concerning the aliphatic, mono-aromatic and poly-aromatic compounds varies as the ratio of PP waste increases in the waste plastic mixtures. In addition to this, the alkene/alkane ratio of gas products shows variations depending on the mixing ratio of wastes.     

北京市居民衣服消费处置及对其回收利用认识调查与分析

首先对北京市居民每年购买新衣服的数量、支出、穿着时间、淘汰原因,以及闲置衣服的处理方式、数量等进行了调查与分析,然后对北京市居民对旧衣物回收利用的认识、回收形式及其处理方式,对旧衣物如何处理回收、再利用的担忧,对希望旧衣物回收箱摆放的场所等进行了调查与分析。其研究结果对废旧纺织品回收体系建设、制度及政策制定具有一定的参考价值。     

Photo-oxidation and Photo-toxicity of Crude and Refined Oils

The fate and effects of an oil spill are effected by solar radiation through the action of photo-oxidation and photo-toxicity. Photo-oxidation, an important process in the weathering of oil, produces a variety of oxidized compounds, including aliphatic and aromatic ketones, aldehydes, carboxylic acids, fatty acids, esters, epoxides, sulfoxides, sulfones, phenols, anhydrides, quinones and aliphatic and aromatic alcohols. Some of these compounds contribute to the marine biota toxicity observed after an oil spill. Photo-toxicity occurs when uptake of certain petroleum compounds, e.g. certain polycyclic aromatic hydrocarbons and benzothiophenes, is followed by solar exposure which results in much greater toxicity than after dark uptake. The mechanism of PAH photo-toxicity includes absorbance of solar radiation by the PAH which produces a free radical and this free radical in turn reacts with oxygen to produce reactive oxygen species that can damage DNA and other cellular macromolecules. While most studies on photo-toxicity have been carried out in the laboratory, there are studies showing that water from an oil spill is photo-toxic to bivalve embryos for at least a few days after the spill. Other studies have found that oil contaminated sediments are photo-toxic to several marine invertebrates. More studies are required to determine if marine fauna at an oil spill site are effected by the action of photo-toxicity and photo-oxidation.     

Novel and innovative pyrolysis and gasification technologies for energy efficient and environmentally sound MSW disposal

Within the context of European Union (EU) energy policy and sustainibility in waste management, recent EU regulations demand energy efficient and environmentally sound disposal methods of Municipal Solid Waste (MSW). Currently, landfill with its many drawbacks is the preferred option in the EU and many other industrialised countries. Within the waste management hierarchy thermal disposal especially incineration is a viable and proven alternative. But, the dominating method, mass-burn grate incineration has drawbacks as well particularly hazardous emissions and harmful process residues. In recent years, pyrolysis and gasification technologies have emerged to address these issues and improve the energy output. To keep the many players in the field comprehensively informed and up-to-date, novel and innovative technology approaches emphasising European developments are reviewed.     

高校环境管理和废弃物处理处置

高校是社会的一个特殊群体,承载着人才培养、科学研究、社会服务和文化传承创新等重任.解决好广大师生在日常工作、学习和生活中所产生的各类废弃物的处理处置问题,以及大学校园的环境规划和环境管理问题,是办好现代大学的重要工作.就高校面临的环境问题、高校环境管理的特殊性和高校废弃物处理处置中应该注意的问题等进行探讨.     

微生物絮凝剂及其在水处理中的应用

近年来对微生物絮凝剂的研究不断深入，新的高效菌种不断被发现。简要介绍了微生物絮凝剂的絮凝机理、分关、絮凝效果及影响因素，重点介绍了新型微生物絮凝剂在水处理中的应用。