共查询到19条相似文献,搜索用时 93 毫秒
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采用自制的蚯蚓培养床,考察了不同比例污泥、秸秆、水果和饼干组成的混合基质经培养床处理后,其基质总磷(TP)、总氮(TN)及有机质含量变化。在保持污泥占主体的情况下,按照污泥:秸秆:水果:饼干的质量比顺序,共设5个基质配比组,经过63 d的培养,结果表明:经蚯蚓培养床处理后,各培养床基质中TP、TN及有机质含量均显著降低,各培养床对基质TP、TN和有机质的平均去除率分别在68.7%~76%,76.8%~80.6%,51.3%~61.6%。添加不同介质对基质中TP、TN及有机质的去除效果影响不明显;各培养床中蚯蚓平均质量增加量为0.022~0.067 g,蚯蚓增殖量为340~422条,纯污泥培养床中蚯蚓的增重和增殖最多;与纯污泥培养床相比,添加其他介质可减少培养床中基质板结,提高基质处理率0.45%~2.7%。 相似文献
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选取炉灰渣、砾石、沸石3种单一基质及组合基质,选取美人蕉、黄菖蒲、芦苇、香蒲、凤眼莲5种水生植物,通过生态盆栽实验模拟小型人工湿地,研究了不同水生植物和基质对城市生活污水中的COD、TP、TN的去除效果,其中香蒲净化污水效果最佳,COD去除率为86.3%,TP去除率为82.4%、TN去除率为82.3%。而基质中的炉灰渣净化效果最佳,其COD去除率为71.0%,TP去除率为75.5%,TN去除率为69.5%。 相似文献
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考察了不同布水条件下蚯蚓生态滤池对生活污水中COD、NH3-N、TN和TP的去除效果。结果表明,各布水方式下COD、NH3-N、TN和TP均有较高的去除,总出水去除率分别为84.1%~94.1%、94.2%~98.3%、70.3%~84.1%和96.9%~98.6%,土壤是污染物去除的主要介质层,尤其是上层土壤(0~25 cm)作用明显,经上反应层后COD、NH3-N、TN和TP去除率已达82.3%~93.1%、86.2%~88.9%、72.2%~79.0%和63.2%~68.2%,后续黄沙层对NH3-N和TP有一定去除效果,碎青石层对有机物和营养物去除基本无作用。研究还发现土壤下层二次布水方式下总出水中COD和TN去除率显著高于其它布水方式,与传统布水方式相比,下层土壤二次布水总出水COD和TN平均去除率分别提高了7.3和5.7个百分点;布水方式对NH3-N和TP去除无显著影响。 相似文献
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An experimental and analytical study was performed to evaluate the adhesion between concrete and overlays using five different substrate surfaces and six different mixtures of self-compacting concrete and mortar. Saw cut surfaces of high strength concrete slabs were used as substrate. After the application of self-compacting concrete or mortar layers to dry, saturated surface dry, saturated surface wet, dry with bonding grout, and saturated with bonding grout surfaces of concrete slabs, they were covered with wet hessian and polythene sheets for curing. At the age of 28 days, friction-transfer tests were performed to evaluate the adhesion. The results indicate that while dry and saturated wet surfaces produced the lowest bond strength, the application of cement bonding grout improved the bond strength significantly. The results also showed that despite the noticeable correlations between the adhesion and the results of different flow tests, aggregate/cement ratio, fly ash/cement ratio, compressive strength, and water/powder ratio, the effect of the other constituents of the employed self-compacting overlays on their adhesion were not so significant. In order to predict the adhesion of self-compacting mixtures applied to concrete substrates, a fuzzy logic model was also devised. The results obtained from the fuzzy logic prediction model were compared with the average results of the friction-transfer method and found to be in very close agreement. The results show that fuzzy logic can be used to predict adhesion of self-compacting overlays. 相似文献
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室温下,采用射频磁控溅射法在玻璃和聚对苯二甲酸乙二醇酯(polyethylene terephthalate,PET)上沉积了掺铝的氧化锌(ZnO:Al,AZO)透明导电薄膜。通过X射线衍射仪分析不同衬底上AZO薄膜的结构,采用四探针测试仪及紫外可见光分光光度计测试薄膜的光电性能。结果表明:沉积在两种衬底上的AZO薄膜都具有六方纤锌矿结构,最佳取向均为[002]方向;玻璃衬底和PET衬底上制备的AZO薄膜的方阻分别为19/sq和45/sq,薄膜透光率均高于90%。实验表明,柔性衬底透明导电氧化物薄膜可以代替硬质衬底透明导电薄膜使电子器件向小型化、轻便化方向发展。 相似文献
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采用脉冲电流沉积法制备了负载于氧化锡铟(ITO)导电玻璃、不锈钢板、镍板和铜板等不同基材上的Co掺杂CdSe薄膜电极,利用紫外可见漫反射和交流阻抗实验测试了Co掺杂CdSe薄膜电极的性能,并以对硝基苯酚降解来评价该薄膜的光电催化性能.结果表明:基材的种类对Co掺杂CdSe薄膜电极的性能影响较大,其催化降解对硝基苯酚的活... 相似文献
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为了了解不同纸张对数字输出阶调特性的影响,采用CorelDraw软件制作单色色阶测试版,选择常用的普通打印纸、一般照片纸和光泽照片纸在Epson Stylus Photo R250彩色喷墨打印机上进行输出,用DS分光光度仪对输出色阶进行CIEL*a*b*色度值的测量,用色彩管理软件为不同纸张制作特性文件,对不同纸张所能达到的数字输出阶调特性进行定量分析。针对选用的纸张进行测量后得出结论,输出色彩丰富的图像优选的纸张应是光泽照片纸,输出灰度层次丰富的图像可以选择普通打印纸。 相似文献