共查询到20条相似文献,搜索用时 109 毫秒
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以中试规模EGSB反应器为研究对象,采用处理同类废水的厌氧污泥进行接种处理废纸造纸废水,研究了快速启动过程中水力停留时间(HRT)、上流速度、反应器容积负荷、p H、VFA及污泥特性等关键因素的变化。结果表明,EGSB反应器在三周即可达到4.85 m/h的上流速度和2.9 h的HRT,COD去除率稳定在70%~90%之间。反应器运行后期,颗粒污泥的产甲烷活性是接种初期的1.63倍,VSS/TSS比值达到88%。 相似文献
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不同接种污泥启动内循环厌氧反应器处理硬质板废水的试验研究 总被引:1,自引:1,他引:0
对接种不同污泥的内循环(IC)反应器处理硬质板废水的启动情况进行了比较、讨论。启动结果表明:接种絮状污泥的1#IC反应器和接种颗粒污泥的2#IC反应器分别经140、46d完成启动,容积负荷分别达到5.20、7.10kg[COD]/(m3·d),COD去除率分别达到90%、88%,出水VFA的质量浓度分别为150~250、130~180mg/L;反应器均运行良好。采用颗粒污泥接种的IC反应器启动时间短,VFA变化幅度小,抗冲击负荷能力强,不容易发生酸败现象,但所需费用要远大于絮状污泥接种的费用。 相似文献
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厌氧氨氧化污泥启动EGSB反应器研究 总被引:1,自引:0,他引:1
通过厌氧膨胀颗粒污泥床(EGSB)反应器接种低温(4℃左右)下存放18个月的厌氧氨氧化污泥,处理模拟废水,研究如何用长时间低温保存后的厌氧氨氧化污泥启动反应器。在温度(34±1)℃、进水pH为7.40~7.64、DO的质量浓度控制在0.10 mg/L以下成功启动反应器。运行110 d后,进水TN负荷最高可达2.3 kg/(m.3d),NH4+-N、NO2--N去除率分别为90.93%、99.76%,出水pH明显高于进水,平均达到7.99;第135天在反应器中发现有红色厌氧颗粒污泥形成;经扫描电子显微镜观察,第165天厌氧颗粒污泥布满球状菌。 相似文献
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折流式厌氧反应器处理印染废水的启动试验 总被引:2,自引:1,他引:1
采用折流式厌氧反应器(ABR)处理难降解印染废水,对其启动过程进行了试验研究.接种污泥由某工业园区污水处理厂厌氧水解池内的厌氧絮状污泥和莱造纸废水处理内循环厌氧反应器的厌氧颗粒污泥按质量比4:5混合接种,采用实际印染废水与葡萄糖按一定比例混合配水作为启动进水,控制cOD的平均容积负荷为0.97kg·m-3·d-1,逐步减少葡萄糖并直至完全不加.反应器经过约60 d的连续运行,稳定运行期COD平均去除率39.5%,色度平均去除率63.4‰印染废水BOD5/COD由0.20提高到O.39,可生化性明显改善. 相似文献
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接种污泥预处理对生物制氢反应器启动的影响 总被引:1,自引:0,他引:1
采用3个相同的EGSB反应器,以糖蜜废水为底物,分别对取自污水处理车间集泥井的缺氧污泥进行曝气预处理和加热预处理,通过与不经任何预处理的接种污泥(对照反应器)的启动试验进行对比,在其他启动控制条件相同的情况下,研究了接种污泥不同预处理对EGSB生物制氢反应器启动的影响。结果表明,与对照反应器相比,经过适当预处理的活性污泥接种至生物制氢反应器有利于反应器的高效快速启动,产氢微生物得到了有效的富集,在启动末期反应器各项指标均优于对照反应器。启动末期,接种污泥经过适当预处理的反应器,酸化率较未经预处理的反应器提高了10%~30%;产氢量提高了1.69~1.82倍。考虑到降低生物制氢的工业化应用成本及提高系统可操作性,本研究推荐应用曝气预处理方法对生物制氢反应器的接种污泥进行预处理,以获得其高效快速启动。 相似文献
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采用低浓度焦化废水对EGSB反应器分别在厌氧以及微氧条件下进行启动对比试验研究。试验结果表明,微量氧的加入,能够快速驯化EGSB反应器中的颗粒污泥,缩短EGSB反应器启动的时间。在焦化废水质量浓度为548mg/L~818mg/L,进水量为1.0L/h、有机负荷为1.1kgCOD/(m3·d)~1.6kgCOD/(m3·d)、回流比为22.25∶1.00,上升流速为3.0m/h的条件下,微氧反应器对COD的去除率达到85%以上,相对厌氧反应器的去除率提高了41%。污泥性质测定结果显示,2种条件下污泥浓度、颗粒化程度、颗粒污泥内部菌群有差异。 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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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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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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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
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In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997 相似文献