查询词典 flocculation

Its rule of change was obtained. On the basis of other studies, the flocculation kinetics and flocs structure was studied. By making some assumptions, collision frequency were presented. Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict flocs number and size during flocculation of Yellow River's loess particles without using empirical parameters. The TEM and SEM were used to obsever flocs in the study of floc structure. The flocculation was divided as flocculi, floc and floc aggregate. The flocs structure model was established by assumption that particles position in floc accords with tetrahedron. The fractal dimension of model and experimental flocs was found to be coincident. So the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent.

最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能眵反映高分子絮凝黄河泥沙生成的絮体结构。

Its rule of change was obtained.On the basis of other studies,the flocculation kinetics and floes structure was studied. By making some assumptions, collision frequency were presented.Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict floes number and size during flocculation of Yellow River's loess particles without using empirical parameters.The TEM and SEM were used to obsever floes in the study of floe structure.The flocculation was divided as flocculi,floc and floe aggregate.The floes structure model was established by assumption that particles position in floe accords with tetrahedron.The fractal dimension of model and experimental floes was found to be coincidentSo the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent

最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符西安建筑科技大学博士学位论文合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能够反映高分子絮凝黄河泥沙生成的絮体结构。

The flocculation has a very important role in water treatment process,and the extent of perfect of flocculation process directly affect the treatment effect of the following treatment. Traditional flocculation theory was based on the hypothesis that colloid was spherical in water, but in fact the characteristic of shape of colloid and Floc. in water has a great influence on the flocculation effect.

絮凝过程在水处理领域具有重要的地位，絮凝过程的完善程度影响着后续工艺的处理效果，传统絮凝理论都是在假设絮体球形的基础上开展的，事实上水中颗粒物和絮凝体的形状特征对絮凝效果有很大的影响，研究这些形体特征对絮凝过程的影响有助于更加准确的了解絮凝过程。

The thesis is researched from the three following aspects: the evaluation of quantitative method of flocculation, malt or barley on the effect of premature yeast flocculation, laser and chloridize lithium mutated and selected yeast with appropriate flocculation.

本课题主要从以下3方面进行研究：酵母絮凝性测量方法的评价、麦芽或大麦等原料对酵母絮凝性的影响、激光-氯化锂复合诱变筛选絮凝性适中的酵母。

The flocculation reaction could be evidently devided into two stages:the flocculation of leaf protein and the precipi-tation of flocculate.

利用乳酸发酵酸作叶蛋白的沉淀剂，其聚沉反应可明显分为叶蛋白聚凝和聚凝物沉降两个阶段。

In order to investigate the effect of flocculation modes on sludge discharge period and sludge static settleability, three types of flocculation equipments including grids, folded plates and me-chanical flocculator were studied at different PAC dosages.

摘 要：在不同的聚合氯化铝投量下，考察了网格、折板和机械搅拌三种絮凝方式对沉淀池排泥周期和污泥静沉性能的影响。

Moreover,the flocculation settlement curves of the lignin locution were determined at deferent temperatures under the condition of the polyaluminum ferric chloride flocculation,the sense of the inflexion point of the curve was discussed,and the acaivation energy of the colloid solution flocculatiov was eltimated,which corresponds to the potential-energy between sol particles accordin.

用传统的化学动力学方法讨论了温度对絮凝过程的影响，测定了木质素溶液在不同温度时被聚氯化铝铁絮凝的絮凝沉降曲线，讨论了曲线上拐点的意义，并估算出该胶体溶液絮凝时的活化能，它相当于DLVO理论为胶体粒子间的势能能垒φm，实验得出φm≈16.5k

The flocculation mixer is flocculation pool mechanical rabble device , it is used for the waste water treatment mixing process mainly.

絮凝搅拌机是絮凝池机械搅拌的装置，它主要用于废水处理的搅拌过程。

A new procedure for virus concentration from water samples has been developed. This method called calcium flocculation-citrate buffer method involves virus flocculation formed by 1 mol/L Ca2+ solution and its flocculating agent, virus release with sodium citrate dissolution (0.3 mol/L, pH5.0), and virus reconcentration by ultrafiltration.

研究建立了一种从水体中浓缩病毒的新方法，即钙离子絮凝-柠檬酸缓冲液洗溶法，该方法的要点是先用一定量的钙离子溶液和钙离子絮凝剂絮凝水体中的病毒，再用pH 5.0的0.3 mol/L的柠檬酸缓冲液洗溶，然后再进一步超滤浓缩。

6Mm, width is about 0.15mm; When the sludge begin to acclimate to the nitrous nitrifying conditions, bacillar flocculation gradually dwindle and decomposition, still disperse into little flocculation.

6高浓度氨氮废水亚硝化稳定期的特征污泥相为：杆状絮体，长度约0.25～1.6mm，宽约0.15mm；当污泥开始对亚硝化产生适应后杆状絮体逐渐变小、解体，直至分散成为很细碎的絮体。

An enzyme that catalyzes the oxidation of many body compounds e.g., epinephrine and ''.

对体内化合物的氧化有催化作用的酶（如：肾上腺素、降肾上腺素、五羟色胺）。

For oneiromancy, I should go to go on a pilgrimage for Buddhist scriptures in ten million 2007 the Spring Festival, experienced a few times find new job often the Kuang Yu of experience already was in half an year stayed in the home, work before earn the money that come to be spent almost a single cent or penny not

为了圆梦，千万里我要去取经2007年春节，经历了几次频繁跳槽经历的旷郁已在家里呆了半年了，之前打工挣来的钱几乎花得分文不