共查询到20条相似文献,搜索用时 78 毫秒
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采用自制的中温厌氧反应器对豆制品废水进行处理,系统考察了豆制品废水COD及产甲烷量随厌氧反应时间的变化情况。结果表明,在35~37℃的中温反应条件下,经12 h连续运行,废水的COD去除率达到89.49%,产甲烷势为0.133 L.(g COD)-1。同时,还考察了向反应器中加入铁屑以形成内电解对厌氧反应参数的影响。结果发现,加入少量铁屑后反应12 h废水的COD去除率达到91.56%,比不加铁屑时提高了2.07%。可为豆制品加工企业的废水处理及反应器的工程设计提供可行的途径和有益的参考。 相似文献
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固体废弃物预处理中药制药废水的实验研究 总被引:1,自引:0,他引:1
采用固体废弃物(铁屑和炉渣)预处理中药制药废水,并以COD去除率和脱色率为指标考察其处理效果。考察了废水pH值、试剂投加量、反应时间等对COD去除率及脱色率的影响,确定了最适工艺条件。结果表明,在弱酸性条件下内电解处理效果较好;加入适量的H2O2可明显提高对COD和色度的去除效果;内电解处理后投加适量的石灰乳对废水的COD去除和脱色均有利。废水预处理的最适工艺条件为:常温下,废水的pH为5.0~6.5,铁屑加入量为60 g/L,炉渣加入量为100 g/L,H2O2加入量为20 mL/L,反应30 min后,加入石灰乳(16 mL/L)调节pH至9。在此条件下,废水COD去除率及脱色率可分别达到73%和96%以上,而且处理成本较低。 相似文献
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本试验采用UASB厌氧反应器对某工业园区食品加工废水进行处理。比较了在中温(37±2℃)和模拟原水水温(26~30℃)的条件下,不同负荷对COD去除率的影响。实验结果显示,当水力停留时间为8 h/d时,厌氧反应器容积负荷为6 kgCOD/(m3.d),在模拟原水水温条件下,COD去除率可达到75%左右;在中温条件下,COD去除率可达到80%左右,均有较好的效果;相对于中温而言,原水水温厌氧在工程应用上节省了投资,该实验结果可为该类食品废水厌氧生物处理提供设计运行依据。 相似文献
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在中温(37±2℃)条件下,采用有效容积为3 L的UASB厌氧反应器处理含高浓硫酸盐的制药废水,采用两级厌氧处理,一级主要脱除SO42-,二级主要去除COD,经过3个月的驯化,水力停留时间为24 h,一级厌氧在COD/SO42-=2.5~3条件下,COD容积负荷可达到9.5 kgCOD/(m3·d),SO42-容积负荷可达到3.6 kgCOD/(m3·d),COD去除率约20%,SO42-去除去除率能达到65%,出水COD/SO42-比值约为7~8;二级厌氧COD容积负荷可达到7.5 kgCOD/(m3·d),COD去除率能达到75%;系统COD总去除率可达到80%,SO42-总去除率可达到65%以上;本试验研究为利用UASB厌氧反应器处理制药废水提供参考依据。 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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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献