共查询到20条相似文献,搜索用时 94 毫秒
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采用絮凝沉淀法处理生活污水中的色度,考察了复合絮凝剂APAC中铝与凹凸棒质量配比、盐基度、污水pH值及复合絮凝剂投加量对除色度效果的影响。实验结果表明:将盐基度为80%的APAC絮凝剂配成2g/L的液体,在m(铝):m(凹凸棒)为2:1、投加量为32~40mg/L、污水pH值为4~12的优化条件下,对实际生活污水中色度的去除率高于98%。同时比较了在相同试验条件下复合絮凝剂与PAC絮凝剂对实际污水的除色度效果,结果表明,APAC的净水效果明显优于PAC。 相似文献
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复合型生物絮凝剂的应用研究 总被引:3,自引:0,他引:3
在复合型生物絮凝剂(CBF)的应用过程中,单独使用CBF处理生活污水,各种污染物的去除率均>60%,其中仍以去除污水中相对个体较大的物质如SS等的能力较强.生活污水经CBF处理后能够达到国家污水排放标准.经过大量的实验,确定了几类废水处理时CBF与AlCl3、PAC的最佳复配投加量,并使絮凝率达到98.6%.结果表明,CBF与化学絮凝剂联合作用的絮凝效果比单独使用CBF的效果还要好,并且CBF的用量降低了60%~75%,化学絮凝剂的用量也大量减少.通过CBF与不同化学絮凝剂的协同作用,完全可以满足污水、给水处理的要求.所有的应用实验都证明,CBF的使用不会造成水中BOD的增加,没有二次污染现象,具有生物安全性. 相似文献
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聚合氯化铝在城市生活污水处理中的应用 总被引:1,自引:0,他引:1
以某城市生活污水处理厂的原水为实验对象,以市售液态的聚合氯化铝(PAC)为絮凝剂,对其进行混凝实验,进而得出该市售液态的PAC对城市生活污水中COD、NH3-N、TP、SS等污染物的去除效果,烧杯摸索最佳的投加条件,为城市生活污水处理厂的生产实际提供参考数据。 相似文献
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研究了天然高分子絮凝剂仙人掌对实际水样的处理效果.应用初步制成的仙人掌絮凝剂分别处理生活污水、生活水源水、高浊度海水.结果表明,仙人掌絮凝剂对生活废水浊度的去除率比较高,可达90%以上.对CODcr的去除率达到近60%. 相似文献
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通过实验对比,优选出高效复合絮凝剂,并对复合絮凝剂混合速度、反应时间及加药次序进行实验研究,提出絮凝剂合理工艺方案.经现场试验,复合絮凝剂能有效净化油田污水. 相似文献
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表面活性剂对油田污水絮凝效果的影响 总被引:1,自引:0,他引:1
采用含表面活性剂的模拟油田污水,研究了表面活性剂对絮凝剂处理效果的影响规律.对于所研究的4种无机絮凝剂,处理后污水的透光率随加剂量的变化规律相同,小分子絮凝剂硫酸铝(AS)的处理效果较聚合无机盐差,聚合氯化铝(PAC)的絮凝效果最好,最佳加剂量为1000 mg·L-1,处理后污水最高透光率为79.3%.有机絮凝剂阳离子聚丙烯酰胺(CPAM)对含表面活性剂油田污水几乎没有处理效果.随絮凝温度的升高,PAC的处理效果提高;随污水中表面活性剂浓度的增大,PAC处理效果变差,即使表面活性剂浓度很低,污水处理难度也显著增大.比较驱油剂表面活性剂和部分水解聚丙烯酰胺(HPAM)对污水处理效果的影响,表面活性剂的影响较大. 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献