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31.
文章结合某造纸厂废水中水回用工程,介绍一种新型先进的过滤技术——纤维转盘滤池,在造纸废水中水回用中的应用。同时对纤维转盘滤池做详细说明。 相似文献
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Karin Sundberg MD Steen Smidt-Jensen Claes Lundsteen Kirsten Agerbæk John Philip 《黑龙江环境通报》1993,13(12):1101-1110
Due to the low cell concentration, cultures from early amniotic fluid specimens usually require 2–3 weeks in culture prior to karyotyping. The purpose of this study was to evaluate the culture quality of amniotic fluid cells from early pregnancy, obtained by a new filter technique. The hypothetical advantage of the technique was that the increased cell yield might reduce the culture time before karyotyping. Culture quality was assessed by the number of colonies, the percentage of colonies containing mitoses in filter and control cultures, and the culture time. The setting was a consecutive clinical trial. One hundred samples were obtained from ongoing pregnancies at 11–14 weeks of gestation (mean 12·8 weeks). By circulating a mean of 26 ml of amniotic fluid through a cell filter system leading the cell-free fluid back to the amniotic cavity, the cell yield was increased in the sample of 7 ml corresponding to the dead space of the filter system. The culture results were compared with control cultures from 5 ml samples drawn from the same pregnancies prior to recirculation. The cultures from the first flushing of the filter system yielded 2·6 times more colonies and in total 4·2 times more colonies were found in the three cultures grown from each filter sample when compared with the control cultures. Moreover, the filter cultures showed significantly more colonies with mitoses. The mean culture time was 8·0 days for the filter cultures, from which the karyotypes were analysed. The controls would have needed more time in culture to fulfil the diagnostic criteria for karyotyping. One case of 47,XY, + 21 was found; the rest had normal karyotypes. We conclude that the filter technique improves the culture quality of early amniotic fluid samples and allows early arrest of the cultures. 相似文献
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铁屑过滤—SBR工艺处理棉纺印染废水 总被引:5,自引:0,他引:5
采用铁屑过滤-SBR工艺处理棉纺印染废水,结果表明,当进水COD为500-1300mg/L,色度为100-200倍,BOD51120-300mg/L,时,COD去除率可达85%,BOD5去除率和脱色率均在90%以上,出水达到了排放标准,该工艺较适合于中小型印染厂废水处理。 相似文献
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石化废水资源化中采用膜分离技术探讨 总被引:1,自引:0,他引:1
苏志远 《石油化工环境保护》2005,28(2):15-17
根据锦西石化污水深度处理回用于循环水补充水、锅炉水补充水的中试试验。讨论了石油化工行业污水深度处理回用的技术路线。结果表明,纳滤、超滤、反渗透技术应用于污染物成份相对复杂的石化行业污水深度处理,是一种能够保证回用水质量的有效途径。 相似文献
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过滤—厌氧—好氧工艺处理酒精废水 总被引:7,自引:0,他引:7
介绍了酒精废水的高效低耗处理工艺,即首先用转鼓滤机去除60%左右的悬浮物并回收作粗饲料;其次,借助原水高温特点,用完全混合式高温厌氧池使废水充分消化;再次,用沉淀池和气浮池实现废水和厌氧污泥的完全分离,使废水的COD降解了92%-94%;最后为好氧处理工段,整个工艺对COD和SS的去除率分别高达99%和99.8%,不仅处理率高,而且能耗很低,还可以回收粗饲料和沼气能源。 相似文献
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应用微絮凝过滤的污水深度处理研究 总被引:1,自引:0,他引:1
张俊贞 《城市环境与城市生态》1991,4(4):3-7
本文就微絮凝过滤用于污水深度处理进行了研究.该工艺选用了陶粒一砂双层滤料滤池,絮凝剂选用了无机高分子絮凝剂PFC(投量20mg/L)和有机高分子絮凝剂(投量0.2mg/L);滤池的反冲洗用气一水·气一水三阶段反洗,效果良好.过滤实验的研究进行了直接过滤,单投PFC及PFC与PDM复配投加的微絮凝过滤三种方式.PFC与PDM复配对色度、COD、T—P有显著的去除效果. 相似文献
39.
As an efficient method for ammonium (NH4+) removal, contact catalytic oxidation technology has drawn much attention recently, due to its good low temperature resistance and short start-up period. Two identical filters were employed to compare the process for ammonium removal during the start-up period for ammonium removal in groundwater (Filter-N) and surface water (Filter-S) treatment. Two types of source water (groundwater and surface water) were used as the feed waters for the filtration trials. Although the same initiating method was used, Filter-N exhibited much better ammonium removal performance than Filter-S. The differences in catalytic activity among these two filters were probed using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and compositional analysis. XRD results indicated that different manganese oxide species were formed in Filter-N and Filter-S. Furthermore, the Mn3p XPS spectra taken on the surface of the filter films revealed that the average manganese valence of the inactive manganese oxide film collected from Filter-S (FS-MnOx) was higher than in the film collected from Filter-N (FN-MnOx). Mn(IV) was identified as the predominant oxidation state in FS-MnOx and Mn(III) was identified as the predominant oxidation state in FN-MnOx. The results of compositional analyses suggested that polyaluminum ferric chloride (PAFC) used during the surface water treatment was an important factor in the mineralogy and reactivity of MnOx. This study provides the theoretical basis for promoting the wide application of the technology and has great practical significance. 相似文献
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