环境影响评价中停车场CO排放量的计算

现在的建设项目大多建设停车场,其排放的污染物中一氧化碳的浓度最大,但是,鉴于经费制约,实测比较困难.确定排放量最关键的参数为等速工况单车排放因子,本文用五种方法对其进行拟和,并通过结果的比较,认为小型车适用指数法,大中型车适用多项式法(二次),并给出了CO等速工况单车排放因子拟和公式,相关系数均在99%以上.最后给出了停车场CO排放量的计算公式,希望对广大环评工作者有所裨益.     

一维平流输送问题的欧拉-泰勒-伽辽金算法及数值试验

介绍了一维常系数平流输送问题的Euler-Taylor-Galerkin(ETG)算法?为获得精确的时间导数,该算法采用了包括二阶和三阶时间导数的前向泰勒级数展开,这些导数值可从空间控制微分方程求出?由此产生一般的时间分离方程?该方程采用标准的Bubnov-Galerkin有限元方法在空间离散化?在使用线性元(帽子函数)和Euler时间差分格式时,可获得精确的Taylor-Galerkin算法?当采用2步显示步骤时,算法为计算效率很高的显式?数值实验结果显示,ETG算法的误差很小,而相误差更可忽略不计,结果令人满意      

Overview on LFG projects in China

Since the first landfill gas (LFG) power plant in China was built in 1998, by now more than 10 years have passed. In this period the LFG utilization process has progressed greatly in China. An overall review of the process is presented in this paper, which includes the background of policies, the information about the approval procedure of LFG projects, and the theoretical methods used to estimate the amount of LFG’s generation. Detailed analysis on the project practice, such as LFG collection techniques, LFG utilization condition in China, is made. According to statistic data, before the end of 2008, 26 LFG power projects have been built and put into operation with total power capacity around 56.8 MW, and 2.234 million tons of carbon dioxide equivalent abatement has been achieved annually by all of these LFG projects. The future of LFG industry in China is expected that there is still considerable developing space for LFG utilization in the near coming years, however after 2012, the progress speed may slow down because of some adverse aspects, such as available landfill resource becomes scarce, new laws implemented in China might exclude Chinese landfills from future CDM activities, etc.     

市政污泥热解产油影响因素及产物应用特性

利用外热式固定床反应器,研究终温、反应时间、升温速率等因素对市政污泥热解产油率的影响,并对产物特性进行了讨论。结果表明,热解终温及反应时间显著影响焦油产率,500 ℃是适宜的污泥热解温度,焦油产率达24.74%,温度继续升高则半焦缩聚反应强烈,热解气产率大幅增加,焦油产率基本恒定;在10 ℃·min-1的升温速率条件下,热解终温500 ℃,维持20 min,焦油产率可达到平衡;升温速率对焦油产率的影响不显著,热解反应达到平衡时,不同升温速率条件下,焦油产率相似;污泥焦油组分与中低温煤焦油相近,具备提酚、制燃料油和特种油品的潜力;污泥半焦灰分高,固定碳含量低,具有一定热值,比表面积较发达,掺混燃烧、制备吸附剂是其重要的潜在利用方向。     

“十三五”总氮、总磷总量控制政策建议

近几年,总量减排作为环境保护的重要抓手,以COD和氨氮等主要水污染物为控制指标,不断推进,取得了显著的成效。截至2013年,中国COD和氨氮较2010年分别下降了7.81%和7.11%,水环境质量明显改善。随着总量减排工作的持续推进,COD和氨氮的排放总量基本得到有效控制,相应的环境污染问题也得到明显缓解,但总氮、总磷等新的环境污染问题开始凸显。重点分析了中国总氮、总磷总量控制的必要性和可行性,并提出相应的总量控制政策的建议。     

Does environmental responsible effect human resources management practice on firm effectiveness and green technology innovation?

Environmental Science and Pollution Research - The research uses human resources management ability and practice, opportunity and motivation (AMO) concept and CSR, environmental responsibility and...     

络合铁法脱除垃圾填埋气中的H_2S

建立了以EDTA和柠檬酸为铁盐络合剂的循环脱硫体系,采用络合铁法对垃圾填埋气中的H2S进行脱硫中试实验,结果表明实验所建立的络合铁脱硫体系运行稳定,脱硫效率高,适合应用于垃圾填埋气中硫化氢脱除.     

绿色产品及技术研究

绿色产品及技术的开发应用是实现人类的可持续发展战略关键技术。本文从产品寿命循环周期出发 ,论述了绿色产品的评价指标 ,绿色制造的体系结构以及绿色集成制造系统。     

Emission inventory evaluation using observations of regional atmospheric background stations of China

Any accurate simulation of regional air quality by numerical models entails accurate and up-to-date emissions data for that region.The INTEX-B2006 (I06),one of the newest emission inventories recently popularly used in China and East Asia,has been assessed using the Community Multiscale Air Quality model and observations from regional atmospheric background stations of China.Comparisons of the model results with the observations for the species SO2,NO 2,O 3 and CO from the three regional atmospheric background stations of Shangdianzi,Longfengshan and Linan show that the model can basically capture the temporal characteristics of observations such as the monthly,seasonal and diurnal variance trends.Compared to the other three species,the simulated CO values were grossly underestimated by about two-third or one-half of the observed values,related to the uncertainty in CO emissions.Compared to the other two stations,Shangdianzi had poorer simulations,especially for SO2 and CO,which partly resulted from the site location close to local emission sources from the Beijing area;and the regional inventory used was not capable of capturing the influencing factors of strong regional sources on stations.Generally,the fact that summer gave poor simulation,especially for SO2 and O 3,might partly relate to poor simulations of meteorological fields such as temperature and wind.