共查询到20条相似文献，搜索用时 31 毫秒
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INTRODUCTIONInordertogetpliableandelegantterylenefabricjustlikesilk,terylenegreigeclothisalwayspretreatedwithalkali-decompositionprocesswh-ereinterylenegreigeclothishydrolyzedtosomeextentinNaOHsolutionatcertaintemperature(T)andpressure.Duringthisprocess,thesuperficialterylenefibreispeeledofffromtheclothanddis-solvedintosolution,inwhichteryleneacid(TA)andethyleneglycolaredischargedaspollutantsinwastewater.Theobtainedterylenefabricwithsi-lkenwrinkleandsoftfeelingiscalledartificialsilkfabr… 相似文献
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Jo Westbrook Nazneen Shah Naureen Durrani Clare Tikly Wazim Khan Máiréad Dunne 《International Journal of Educational Development》2009
This paper addresses issues related to the effectiveness of teacher education in Pakistan in the North West Frontier Province (NWFP), through a small scale collaborative research study in two state secondary schools, one girls’ and one boys’. The aim was to explore how newly qualified teachers manage their transition from student teachers to classroom teachers. In teasing out the relationship between teacher training experiences and classroom practice, we highlight the importance of greater consideration of the social and professional contexts of the school within training programmes as a means to make sustained improvements in the quality of classroom teaching and learning. 相似文献
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在次贷危机、人民币升值、劳动力和原材料价格上涨等多重压力下,中国纺织服装行业发展自2008年以来似乎陷入困境。文章利用动态可计算一般均衡(CGE)模型,首先通过对纺织服装业的发展历史,分析行业的技术变迁路径和扩张原因;然后对比了人民币升值、出口退税和工资上涨的相关影响;最后研究了次贷危机引起的国际需求下降对当下纺织服装行业的影响和未来行业发展趋势。认为MFA取消以后的资源重新配置对中国纺织服装有长期正的影响,具有资本密集倾向的纺织业在危机中可能有足够的承受能力,而服装加工行业将在长期危机中严重受损。纺织服装受到的冲击导致2009年实际GDP增速降低1.3%。虽然2009年中国经济增长保8目标最终实现,但针对未来可能出现的就业问题,建议政府短期内除出口退税外,采用工资补贴政策;在长期保持汇率稳定,避免大幅度升值。 相似文献
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Combined treatment of landfill leachate with fecal supernatant in sequencing batch reactor 总被引：2，自引：1，他引：1
A laboratory-scale sequencing batch reactor （SBR） is used to treat landfill leachate containing high concentration of ammonium nitrogen with municipal fecal supernatant. The SBR system is operated in the following sequential phases： fill period, anoxic period, aeration period, settling period, decant and idle period. The results indicated that the average removal efficiencies of COD, BOD5, TN, NH4^＋-N were 93.76%, 98.28%, 84.74% and 99.21%, respectively. The average sludge removal loading rates of COD, BOD5, TN and NH4^＋-N were 0.24 kg/（kg SS.d）, 0.08 kg/（kg SS.d）, 0.04 kg/（kg SS.d） and 0.036 kg/（kg SS.d）, respectively. Highly effective simultaneous nitrification and denitrification was achieved in the SBR system. The ratio of nitrification and denitrification was 99% and 84%, respectively. There was partial NO2^- denitrification in the system. 相似文献
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Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics parameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the moderate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (KS) were 0.0208-0.0642 L/(gMLSS)·h and 0.44-0.59 (gCOD)/L respectively at 20 ℃-35 ℃. Activation energy (Ea) was 6.05×104 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment. 相似文献
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纺织业是我国的传统制造业。金融危机下,纺织业的出口受到很大影响,整个供应链面临库存增加的问题。本文在结合纺织业供应链特点的基础上。分析金融危机下纺织业供应链面临的问题及其原因,并提出短期和长期的建议。 相似文献
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从COD测定实验的改进看分析化学实验教材的改革 总被引：1，自引：0，他引：1
邹龙生 《湖南科技学院学报》2008,29(8)
从分析化学实验教材中化学耗氧量（COD）测定实验的改进入手,阐述分析化学实验教材应增加知识点,开阔知识面的必要。 相似文献
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长期以来，我国的纺织工业一直受到高进口关税税率的保护。加入WTO后，关税的大幅降低，对进口依赖较强的纺织行业将带来较大冲击。现阶段，纺织机械、面料、化学纤维行业受到的冲击尤为明显。 相似文献
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李晓莉 《宁波职业技术学院学报》2009,13(4):56-60
通过对十大振兴产业的多角度分析,以扩大内需发挥稳定作用的纺织工业、轻工业和通过振兴实现战略性重组的钢铁、船舶工业、石化、有色金属等产业存在中短期交易性机会,而在未来经济发展中起引领作用的电子信息、装备制造业、汽车、物流业等产业则存在中长期战略性投资机会. 相似文献
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Haimanot Habte Lemji Hartmut Eckstädt 《Journal of Zhejiang University. Science. B》2013,14(10):924-933
Evaluating the performance of a biotrickling filter for the treatment of wastewaters produced by a company manufacturing beer was the aim of this study. A pilot scale trickling filter filled with gravel was used as the experimental biofilter. Pilot scale plant experiments were made to evaluate the performance of the trickling filter aerobic and anaerobic biofilm systems for removal of chemical oxygen demand (COD) and nutrients from synthetic brewery wastewater. Performance evaluation data of the trickling filter were generated under different experimental conditions. The trickling filter had an average efficiency of (86.81±6.95)% as the hydraulic loading rate increased from 4.0 to 6.4 m3/(m2·d). Various COD concentrations were used to adjust organic loading rates from 1.5 to 4.5 kg COD/(m3·d). An average COD removal efficiency of (85.10±6.40)% was achieved in all wastewater concentrations at a hydraulic loading of 6.4 m3/(m2·d). The results lead to a design organic load of 1.5 kg COD/(m3·d) to reach an effluent COD in the range of 50–120 mg/L. As can be concluded from the results of this study, organic substances in brewery wastewater can be handled in a cost-effective and environmentally friendly manner using the gravel-filled trickling filter. 相似文献
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施刚 《商丘职业技术学院学报》2010,9(4):43-45
产业结构调整中,由于产业所处的生命周期不同,产业中的企业所面临的外部环境就存在差异,企业所选择的战略相应也有所不同。本文在识别南通纺织行业生命周期的基础上,对南通纺织企业战略选择进行了分析。 相似文献
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为探索EM菌在淡水水质净化处理中的作用,以不同的EM菌液浓度（VEM/V污水为0‰、0.1‰、0.5‰、1‰、5‰）在有氧通风、常温条件下处理天心湖水样,通过测定湖水样处理前后的pH、SS、色度、COD和氨氨水平变化,评价EM菌对淡水水质的处理效果,研究结果表明：浓度为0.1‰的EM菌液处理对天心湖水的COD去除效果最佳;浓度为1‰的EM菌液对天心湖水的氨氮去除效果最佳;浓度为5‰的EM菌液处理使湖水COD、氨氮水平升高,水质反而受到污染.通过选择EM浓度、处理时间、处理温度三个影响因素,按L9（34）正交表进行正交实验,结果表明EM处理天心湖水的最佳工艺条件是：处理时间7d、处理温度30℃、EM浓度0.2‰,对COD的去除率达到36.52％;按上述正交实验最佳工艺条件进行验证实验,结果表明,对天心湖水中COD的去除率可达到35.47％,对生活污水处理COD去除率可达41.18％.本实验可为进一步研究EM在水质处理上的应用提供参考. 相似文献
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区域主导产业选择和发展对于区域经济发展具有重要意义。采用比较优势、需求收入弹性系数和产值增长率定量指标,结合相关数据,对六安市各产业进行综合分析。结果显示：汽车零部件制造业、铁矿开采与钢铁工业、机电与家电制造业等为六安市的主导产业,并且提出了促进主导产业发展的对策。 相似文献
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王福君 《鞍山师范学院学报》2008,10(3):18-21
鞍山是沈大黄金经济轴带上的重要支点,其产业结构升级和产业空间布局是沈大黄金经济带中部隆起的关键因素。本丈分析了鞍山地区产业结构呈现的二元性、单一性、资源型、产业关联性弱、空间布局不合理的特点,提出了鞍山地区产业结构升级要建立以钢铁产业为主导产业体系链和以产业互补为基础的产业集群、壮大现代装备制造业集群、做强矿产品精深加工业集群的思路,并提出了鞍山地区产业空间布局要以中部鞍海经济带为轴线进行轴带集聚,合理布局钢铁工业、装备制造业、轻纺工业、矿产品加工业、高新技术产业、现代服务业和现代农业。 相似文献
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钟远清 《中山大学学报论丛》1990,(1)
同时采用高锰酸钾法和重铬酸钾法测定河水水样的化学需氧量(COD),结果表明,用重铬酸钾法所测得的COD值较高,因此,不能把两种方法所测定的结果互相混用。 相似文献
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改革开放后，台商投资大陆经历了20世纪80年代的试探性扩张时期、20世纪90年代的第一次高潮时期以及进入21世纪后的第二次高潮时期三个阶段。在不同时期，台商投资的产业选择都存在较大的区别，经历了由最初的以纺织为代表的劳动力密集型产业。到20世纪90年代的以机电、石化为代表的资本密集型产业，再到最近几年以电子为代表的技术密集型产业的变化过程。在未来的一段时期内，台商投资热潮，特别是对电子信息等高新技术产业的投资还将持续，不过，投资的产业也将由制造业逐渐向服务业特别是金融保险业等高端服务业转移。 相似文献
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殷国手 《兰州石化职业技术学院学报》2001,1(2):50-54
结合甘肃轻纺工业实际 ,指出规模经济的相对性和有效性 ,分析了甘肃轻重工业结构长期失衡对甘肃经济发展的制约 ,提出了治理对策和相关的政策建议 相似文献