湖北省港口物流体系的空间分析

从系统论角度,以港口空间结构为切入点,采用定性与定量相结合的方法,研究了湖北省港口物流发展的集、疏、运条件。分析了湖北省港口物流腹地经济的水平与规模、港口物流体系的空间结构,提出了湖北省港口物流空间布局构想。     

解读鞭炮销售点背后的部门利益链

社会学家孙立平先生有一个论断:政府部门利益化的实质,是政府的公共权力被具有私利的主体所分解.现实生活中,我们也不时见到"政府部门利益化"的个案,看到以法律形式固定下来的部门利益.     

烷基多苷促进污泥水解产酸的研究

采用向污泥中投加生物表面活性剂烷基多苷(APG)的方法,研究了APG投加量和水解时间对剩余污泥水解产酸过程的影响.结果表明,APG显著降低污泥表面张力,强化污泥水解,在最适投加量(以TSS计,下同)0.2 g·g-1下,SCOD、蛋白质和可溶性糖的浓度均在12h内达到最大,分别由初始的4 280.2、1 122.9和246.5 mg·L-1上升到6 481.1、1 639.3和1 205.8mg·L-1,同时短链脂肪酸(SCFAs)浓度由1 309.9 mg·L-1增加为2 221.6 mg·L-1,且SCFA的组分分布随之改变,APG投加量越大,SCFAs达到最大浓度所需时间也随之延长.随着APG投加量的增大,α-葡萄糖苷酶相对活力由1.5升至2.5,而蛋白酶相对活力在低投加量下由1.4升至1.9,高投加量下降至1.5.不论APG是否存在,α-葡萄糖苷酶和蛋白酶的活力在达最高后都随着水解时间的延长而逐渐降低.整个过程中pH均呈现先减小后增大的趋势.     

Sulfur evolution in chemical looping combustion of coal with MnFe2O4 oxygen carrier

Chemical looping combustion （CLC） of coal has gained increasing attention as a novel combustion technology for its advantages in CO2 capture. Sulfur evolution from coal causes great harm from either the CLC operational or environmental perspective. In this research, a combined MnFe2O4 oxygen carrier （OC） was synthesized and its reaction with a typical Chinese high sulfur coal, Liuzhi （LZ） bituminous coal, was performed in a thermogravimetric analyzer （TGA）-Fourier transform infrared （FT-IR） spectrometer. Evolution of sulfur species during reaction of LZ coal with MnFeaO40C was systematically investigated through experimental means combined with thermodynamic simulation. TGA-FTIR analysis of the LZ reaction with MnFe2O4 indicated MnFe2O4 exhibited the desired superior reactivity compared to the single reference oxides Mn304 or Fe203, and SO2 produced was mainly related to oxidization of H2S by MnFe2O4. Experimental analysis of the LZ coal reaction with MnFe2O4, including X-ray diffraction and X-ray photoelectron spectroscopy analysis, verified that the main reduced counterparts of MnFe2O4 were Fe304 and MnO, in good agreement with the related thermodynamic simulation. The obtained MnO was beneficial to stabilize the reduced MnFe2O4 and avoid serious sintering, although the oxygen in MnO was not fully utilized. Meanwhile, most sulfur present in LZ coal was converted to solid MnS during LZ reaction with MnFe2O4, which was further oxidized to MnSO4. Finally, the formation of both MnS and such manganese silicates as Mn2SiO4 and MnSiO3 should be addressed to ensure the full regeneration of the reduced MnFe2O4.     

Determining short chain fatty acids in sewage sludge hydrolysate：A comparison of three analytical methods and investigation of sample storage effects

In anaerobic digestion, the production of short-chain fatty acids （SCFAs） can be beneficial or harmful to the overall process, depending on the concentration of accumulated acids. Therefore, the accurate determination of the SCFA concentration in both fresh and stored sludge hydrolysates is important. To select a suitable method for monitoring SCFAs during the anaerobic digestion of sewage sludge, the accuracy of three available analytical methods, including 5 pH point acid titration （TITRA5）, gas chromatography （GC）, and spectrophotometry, were compared in the present study. The results revealed that TITRA5 and GC displayed better agreement in the achieved measurements and higher precision and accuracy than the spectrophotometric assay, as supported by the application of different statistical models. TITRA5 excelled in titrating unfiltered hydrolysate while simultaneously measuring the alkalinity, whereas the GC method provided detailed information on the contribution of different fatty acids to the total acidity. In contrast, the spectrophotometric assay suffered from many forms of interference, depending on the sample＇s matrix. SCFA production followed the pattern of enzymatic reactions and fitted the Michaelis-Menten model. In addition to promoting TITRA5 as an accurate and robust analytical tool for routine SCFA analyses, this comparative study also demonstrated the possibility of storing hydrolysate samples at different temperatures and durations without altering the SCFA measurements.     

低碳经济下煤炭物流发展策略分析

经济进步与环境保护和谐发展,以低资源消耗和低环境污染,获取更大经济效益的低碳经济发展模式已经成为整个世界关注的焦点。传统的煤炭行业以“高开采、低利用和高排放”为特征,必然导致自然资源浪费及环境污染等一系列问题的出现。物流业已成为我国“十二五”期间重点规划振兴的十大产业之一。其中煤炭物流是行业物流的重要组成部分。因此实现煤炭物流的低碳与绿色发展,对于促进我国经济发展方式转变、     

循环型企业“三链”融合发展的途径与政策——以晋江东风橡胶有限公司为例

企业是发展循环经济的主体,循环型企业是建设生态文明的重要力量。从"技术链、产品链、价值链"融合发展的视角,分析循环型企业"三链"融合的概念内涵和重点工作,以福建省晋江东风橡胶有限公司为案例,研究循环型企业"三链"融合发展的实现途径,并从政府经济管理角度,提出推进循环型企业"三链"融合发展的政策体系,为解决循环型企业发展中面临的资源环境压力、技术创新不足等现实问题提供决策参考。     

大连港集团

正大连港集团是于2003年在承继原大连港务局港口业务的基础上实施公司化改制设立的国有港口物流企业,拥有集装箱、油品及液体化工品、粮食、矿石、煤炭、客货滚装、散杂货、汽车滚装等专业化码头泊位。大连港集团在多年开展针对船舶污染和装卸生产作业的污染源控制过程中,积极引进环保新技术,认真做好节能减排和港口环     

低碳物流与绿色物流的对比分析

论文通过对低碳物流和绿色物流的对比,分别从产生背景、内涵、特征、主要功能环节、发展模式五个方面进行分析,找出了二者的区别和联系,提出了各自的发展方向及发展对策,以加快我国低碳物流和绿色物流的发展进程。