共查询到20条相似文献,搜索用时 125 毫秒
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鼠李糖脂促进含油餐饮废水的生物降解 总被引:3,自引:1,他引:2
研究生物表面活性剂鼠李糖脂发酵液在含废油餐饮废水的好氧处理过程中的降解性能.结果表明,作为一种高效、绿色环保的生物表面活性剂,鼠李糖脂发酵液能非常迅速地促进废水中餐饮废油的生物降解.在采用活性污泥法处理实际废水的曝气池中的试验进一步表明,对油脂的生物降解能力而言,添加鼠李糖脂发酵液比未添加的处理效果要显著得多;同时,温度和糖脂发酵液的添加量对降解能力有较明显的影响.在27℃和糖脂加量为1倍CMC的最优条件下,废水中废油24 h的生物降解率高达89%. 相似文献
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采用三氯乙酸法去除光皮木瓜粗糖中的蛋白质。利用精制后的光皮木瓜多糖测得光皮木瓜多糖对葡萄糖的换算因子后,用苯酚—硫酸法对光皮木瓜中多糖含量进行了测定,研究了显色温度、显色时间、苯酚及硫酸用量对多糖含量测定的影响。确定最佳测定条件为:显色温度100℃、显色时间15 min、苯酚用量1.0 mL、硫酸用量5.0 mL,在该条件下所测得的光皮木瓜多糖的平均含量为12.16%。且实验重现性和稳定性均较好。 相似文献
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生物表面活性剂复合体系在强化采油中的应用研究 总被引:3,自引:0,他引:3
针对大庆油田小井距生物表面活性剂复合体系先导性矿场试验 ,利用自行研制并生产的6 0t鼠李糖脂发酵液 (RH)与其他表面活性剂进行复配 ,优选出了适合于大庆油田小井距的三元复合体系配方。通过对配方的综合性能评价 ,证明RH可以拓宽超低界面张力区域 ,降低表面活性剂的吸附滞留量 ,三元复合体系驱油效率比水驱提高 2 0 %以上。另外 ,在驱油效率相同的情况下 ,降低ORS41用量 5 0 % ,成本核算表明 ,生物表面活性剂三元复合体系成本比原三元复合驱矿场试验化学剂成本节省 30 %以上。 相似文献
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王艳玲 《中国石油和化工标准与质量》2012,32(4):30
利用正交试验法优化碳源、硝酸盐、磷酸盐、铁盐、微量元素5个因子对代谢糖脂类生物表面活性剂菌种(SLT01)产量的影响,确定了各因子的最佳配比为:碳源:石蜡8.0ml;硝酸盐:NaNO31.0g;磷酸盐:KH2PO48.0g、K2HPO42.4g;MgSO42.0g。以及微量元素MnSO40.015g和FeSO40.02g;酵母膏1.0g;H2O1000mL,得出最适合该菌种生长代谢的培养基。并通过苯酚——硫酸法对发酵产物进行定量检测,确定发酵液中糖脂类生物表面活性剂的含量。 相似文献
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高位阻双酚2,2'-亚甲基双(4,6-二叔丁基苯酚)的合成 总被引:4,自引:0,他引:4
以2,4-二叔丁基苯酚和甲醛为原料,乳液缩合法合成2,2′-亚甲基双(4,6-二叔丁基苯酚)(MB46)。分别考察了催化剂和表面活性剂种类及用量、水的用量及反应时间等对反应的影响,实验结果表明,表面活性剂的种类对反应有很大的影响,采用阴离子表面活性剂十二烷基硫酸钠效果较好。在2,4-二叔丁基苯酚10.3g、甲醛2.5mL的合成条件下,最佳工艺参数为:十二烷基硫酸钠0.1g,水的用量为40mL,反应时间为7h,硫酸用量为0.6mL。 相似文献
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《中国洗涤用品工业》2020,(1):85-85
2019年夏天,联合利华在智利成功推出了以“Quix”为品牌的洗洁精产品,这是鼠李糖脂在全球范围内首次被用于家用清洁产品中。赢创的鼠李糖脂是一种通过发酵制得的生物表面活性剂,具有卓越的泡沫形成性和出色的清洁效果,满足了联合利华消费者的需求。同时,由于鼠李糖脂来源于天然糖,100%可生物降解,因此具有极好的环境效益。 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