粘性土填筑路堤的试验与施工措施

根据福州二环三期A7项目路基土工试验和施工现场压实试验结果,对粘性土路基施工产生裂缝的成因进行了综合分析,提出了施工中具体处理的技术措施,可供粘性土路基施工和监理人员参照应用     

掺粉煤灰、早强减水剂砼在桥梁立柱施工的应用效果

本文介绍了掺粉煤灰、高效早强减水剂混凝土在鸿尾大桥下部结构中的应用,阐述利用粉煤灰、高效早强减水剂优化混凝土配合比试验,以及在泵送施工技术和改善立柱表观质量方面的应用效果。     

某食品废水厌氧处理技术节能效果与经济效益评估

以某食品厂为实例,对比在厌氧+好氧MBR与单独好氧MBR工艺中,厌氧技术的节能效果和经济效益。结果表明,单独好氧MBR和厌氧+好氧MBR对于食品废水中有机污染物的降解效果均较好,COD去除率分别达到98.02%和98.93%;单独好氧MBR吨水运行能耗为7.33k Wh/m³,而厌氧+好氧MBR吨水运行能耗为3.64kWh/m³,约节50.34%的运行能耗。单独好氧MBR吨水处理费用约为7.244元/m³;厌氧+好氧MBR不计沼气的收益,吨水处理费用为3.262元/m³,计入沼气收益吨水运行费用为0.291元/m³,经济效益显著。     

Surface reactive species on MnOx（0.4）-CeO2 catalysts towards soot oxidation assisted with pulse dielectric barrier discharge

MnOx(0.4)-CeO2 was investigated for soot oxidation assisted with a pulse dielectric barrier discharge(DBD).The catalysts were evaluated and characterized with TPO(temperature programmed oxidation),X-ray diffraction(XRD),Raman and X-ray photoelectron spectroscopy(XPS).The ignition temperature Ti for soot oxidation decreased from 240.8 to 216.4 oC with the increase of the pulse DBD frequencies from 50 to 400 Hz,lower than that of the case without pulse DBD present(253.4 oC).The results of XRD,Raman and XPS agreed well with the TPO activities of MnOx(0.4)-CeO2 towards soot oxidation.More solid solution of ceria and manganese,and surface reactive species including O2–,O– and Mn4+ were responsible for the enhancement of soot oxidation due to pulse DBD injection in the present study.For solid solution favors to the activation and transformation of those species,which are believed to be involved in the soot oxidation in a hybrid catalysis-plasma.