垃圾焚烧发电厂循环流化床焚烧炉优化改造

针对垃圾焚烧发电厂循环流化床焚烧炉存在的炉膛内部受热面吸热份额较大和受返料器影响的问题,重点进行减少掺煤量的焚烧炉燃烧室优化改造,进一步控制污染排放,达到节能降耗,取得了较好的经济效益。     

城市垃圾的再生利用

介绍了城市垃圾的种类及其危害,提出了将城市垃圾进行再生利用的一般程序及各种技术措施。     

浅谈乌鲁木齐市生活垃圾处理策略

如何治理城市生活垃圾是全国迫切需要解决的焦点问题,乌鲁木齐市亦然。乌鲁木齐市现行的垃圾对策和管理模式已不适应解决这一问题,必须作根本性调整。经过调查研究,并借鉴国内外经验,提出适合乌鲁木齐市生活垃圾处理的具体对策。     

垃圾块体填埋法及其应用前景

分析了垃圾排弃的现状、危害、潜在价值及现有的垃圾处理方法,提出创新垃圾处理方法势在必行。与已有的垃圾处理方法比较,垃圾块体填埋法有自己的特点,以社区为单元的垃圾源头分类投放、收集和预处理,能使垃圾实现分类化处理;通过垃圾中可回收废物的回收利用,能使垃圾最大限度资源化;通过垃圾分类粉碎、脱水、压缩成块体,使垃圾有效地减量化;经过消毒、分类堆砌有助于垃圾填埋场地的分类管理和安全监控,使垃圾处理基本无害化;回收、堆肥、焚烧、填埋,使垃圾处理综合化;填埋场的复垦与开发利用,使垃圾处理环保化。该方法的推广应用,可使垃圾处理无害化、减量化、资源化和市场化目标得以实现。     

Urban ecological risk assessment management platform

Due to rapid socioeconomic development in recent years, the influence of human activities on the urban ecosystem and environment is becoming more pronounced, causing increases in accumulated pollutants, resource consumption, and built-up land area. At this time, cities are facing complex ecological threats. We designed a platform to classify and assess the various types of ecological risks that cities and urban agglomerations may encounter. We used PHP to develop a web-based application, with nginx as the platform server, and MySQL to manage the background database. The platform provides users with a clearly structured, visual platform to manage ecological risk. By using this platform, users can quickly identify regional risk sources, find and describe risk factors, and predict possible consequences caused by these risks based on simulation modeling. The forecasting model and database can be synchronously updated and adjusted according to the actual situation. The visual web management platform and user security login system employ the MD5 encryption algorithm. The platform is designed to provide convenient, accurate, and scientific decision-making services for urban planning, construction, environmental protection, and other related areas.     

Pesticides in stormwater runoff−A mini review

• The sources and pathways of pesticides into stormwater runoff were diverse. • Factors affecting pesticides in stormwater runoff were critically reviewed. • Pesticides mitigation strategies were included in this review. • The current knowledge gap of the pesticides in stormwater runoff was identified. Recently, scientific interest has grown in harvesting and treating stormwater for potable water use, in order to combat the serious global water scarcity issue. In this context, pesticides have been identified as the key knowledge gap as far as reusing stormwater is concerned. This paper reviewed the presence of pesticides in stormwater runoff in both rural and urban areas. Specifically, the sources of pesticide contamination and possible pathways were investigated in this review. Influential factors affecting pesticides in stormwater runoff were critically identified as: 1) characteristics of precipitation, 2) properties of pesticide, 3) patterns of pesticides use, and 4) properties of application surface. The available pesticide mitigation strategies including best management practice (BMP), low impact development (LID), green infrastructure (GI) and sponge city (SC) were also included in this paper. In the future, large-scale multi-catchment studies that directly evaluate pesticide concentrations in both urban and rural stormwater runoff will be of great importance for the development of effective pesticides treatment approaches and stormwater harvesting strategies.     

Occurrence,distribution and risk assessment of abused drugs and their metabolites in a typical urban river in north China

We developed a method for determining 11 abused drugs in water and sediment. METH and EPH were the dominant drugs in water and sediment in Beiyunhe River. Abuse drugs in Beiyunhe River were mainly from hospitals and sewage effluents. Abused drugs in the water would not impair the aquatic ecosystem biologically. This study investigated the presence of 11 abused drugs and their metabolites, including amphetamine, methamphetamine (METH), ketamine, ephedrine (EPH), cocaine, benzoylecgonine, methadone, morphine, heroin, codeine, and methcathinone in the surface water and sediment samples of Beiyunhe River, a typical urban river flowing through Beijing, Tianjin, and Hebei provinces in North China. An analytical method of determining these abused drugs and their metabolites in water and sediment was developed and validated prior to sample collection in the study area. Results showed that METH and EPH were predominant in water and sediment samples. The total drug concentrations ranged from 26.6 to 183.0 ng/L in water and from 2.6 to 32.4 ng/g dry weight in sediment, and the drugs mainly originated from hospitals and sewage treatment plants. The average field-based sediment water distribution coefficients of abused drugs were calculated between 149.3 and 1214.0 L/kg and corrected by organic carbon. Quotient method was used to assess the risks. The findings revealed that these drugs and their metabolites at determined concentrations in water samples will not impair the aquatic ecosystem biologically, but their potential harmful effect on the function of the ecosystem and human health should not be overlooked.     

Comparing urban solid waste recycling from the viewpoint of urban metabolism based on physical input-output model: A case of Suzhou in China

Investigating impacts of urban solid waste recycling on urban metabolism contributes to sustainable urban solid waste management and urban sustainability. Using a physical input-output model and scenario analysis, urban metabolism of Suzhou in 2015 is predicted and impacts of four categories of solid waste recycling on urban metabolism are illustrated: scrap tire recycling, food waste recycling, fly ash recycling and sludge recycling. Sludge recycling has positive effects on reducing all material flows. Thus, sludge recycling for biogas is regarded as an accepted method. Moreover, technical levels of scrap tire recycling and food waste recycling should be improved to produce positive effects on reducing more material flows. Fly ash recycling for cement production has negative effects on reducing all material flows except solid wastes. Thus, other fly ash utilization methods should be exploited. In addition, the utilization and treatment of secondary wastes from food waste recycling and sludge recycling should be concerned.     

利用垃圾焚烧发电技术与环境污染防控措施

大连利用生活垃圾焚烧发电,在消除污染的同时发展新能源,促进循环经济发展,具有较好的社会、环境和经济效益。简要介绍垃圾焚烧原理、工艺流程和技术特点,二恶英类污染物预防控制措施,以及焚烧灰渣无害化处理处置措施等,与国内同行交流、借鉴。     

绿色“引擎”促可持续发展之路——新天地环境服务集团“城市矿产”示范基地建设

新天地环境服务集团作为环保战略新兴产业的领跑者,被列为国家首批"城市矿产"示范基地之一。新天地集团抢抓机遇,勇于创新,不断思考和探索"城市矿产"示范基地建设的新思路和新模式,取得了积极成效。