三级接触曝气用于深度污水处理的组合净化工艺

提供了一种使用三级接触曝气用于深度污水处理的组合净化工艺，该工艺能够通过吹洗控制，处理含有N和P的污水。该系统无沉淀槽，在每个接触曝气槽中通过活化杆菌、单胞菌属、假单胞菌属等大量的减少污泥的产生和减少各种污染物。该深度污水处理系统由一个筛网、一个磨料室、一个厌氧接触槽、一个流量控制槽、一个接触曝气槽、一个缺氧接触槽、     

你准备好了与安全同行吗？

安全的重要性，安全生产的话题，我们每天在电视、网络、报纸上都能看到。人的生命只有一次，人身安全是同一个人、一个家庭、一个企业、一个国家乃至整个社会联系在一起。如果一个人的人身安全都没有保障，他还有心情去看蓝天白云吗？如果一个家庭中人员的人身安全都没有保障，这个家庭会幸福吗？     

食品工业清洗标准亟待完善

<正>工业与公共设施清洗,是一个非常大的行业领域,食品工业清洗仅仅是工业清洗的一部分。但是,食品工业是一个涉猎广泛的行业,它包括农业、畜牧业、渔业、林业、化工、机械制造以及包装等行业。食品安全现状堪忧由于食品行业与人们的日常生活密切相关,并且中国有一个全世界最好的物流基础(如去年光棍节,国内物流体系可以在一个周的时间把几个亿的订单发到每一个消费者的家里去),同时又有一个庞大的消费人口基数,以及多样化的饮食习惯,还有这些年持续的经济增     

创新是企业的生存之本

江泽民同志在党的十六大报告中指出：“创新是一个民族进步的灵魂，是一个国家兴旺发达的不竭动力，也是一个政党永葆生机的源泉”。为人们指明了创新对一个国家、一个民族、一个政党、乃至任何一个组织的重要性。     

胶粘剂新专利

内窥镜和涂布密封剂、胶粘剂的工具以及减少食物吸收的肠内衬层 本发明仪器的第1部分包含一个插管和一个类似内窥镜的移动装置,它能通过口腔、咽喉、食道、胃直达小肠。内窥镜的腔内有2个可伸展的工具,其中一个的末端是可以膨胀和收缩的球形头：另一个含有可引发密封剂、胶粘剂光固化的光学纤维。本仪器的第2部分含有一个筒状内衬膜,它将被安置在小肠内壁上,以防止食物被纤毛吸收。     

网络安全风险评估在企业中的应用

信息安全不是一个孤立静止的概念,而是一个多层面、多因素、综合、动态的过程。信息安全建设是从体系建设过程、运行及改进过程、风险评估过程再到体系建设过程的一个循环往复的过程。面向企业网络的安全体系建设,是一个需要在不断考察企业自身发展环境和安全需求的基础上,通过对现有系统的风险评估,不断改进的过程。     

会放电的“眼睛”

正Yi Mei拱手作揖为礼,手工作物为美。揖美,是一个发现、传播美好手作的特色栏目,也是一个享玩手工、音乐、时尚的创意活动场域,更是一个展卖原创设计、手工作品、特色好物的生活美学空间。     

“官庄”之谜

在景德镇市西郊、昌江北岸，有一个叫“官庄”的自然村。但凡一个域名、一个村名，总与当地的历史渊源或者重大事件、主要特产等文化积淀有关联。景德镇的官庄，又有什么鲜为人知的谜情呢？     

三、开阔视野 多角度思雏

1、婚姻的成功取决于两点：找个好人；自己做个好人。2、一个人需要技巧和智慧。但最不能少的．是原则和信念。3、教育了一个女孩就是教育了一个家庭、一个民族、一个国家。     

论紫砂“线圆提梁套壶”的线条艺术

"圆"是中国传统文化中一个意义颇为丰富的词汇。"圆"不仅是一个字、一道曲线,它还是一个景象、一个寓言、一个哲理、一个故事。本文试从紫砂"线圆提梁套壶"的圆器造型与线条,谈谈壶器的造型艺术特征及其审美价值。     

过碳酸钠洗涤性能和稳定性能影响因素的研究

过碳酸钠 (PC)是一种碳酸钠与过氧化氢的络合物 ,其特点是对环境无污染。作者以洗涤剂中含有过碳酸钠为前提 ,从洗涤剂最常见的原料对PC的活性与稳定性能的影响方面进行了研究 ,通过实验证明Na2 CO3 、Na2 SO4 、十二烷基苯磺酸钠 (LAS)、三聚磷酸钠 (STPP)、MgSO4 、Na2 SiO3 、四乙酰乙二胺 (TAED)对PC的活性和稳定性都有影响。发现Na2 CO3 对过碳酸钠漂白的促进作用在过碳酸钠质量浓度低的时候尤其明显 ;随着Na2 SO4 、LAS用量的增加 ,白度值上升 ,在达到一定值后白度下降 ;而STPP恰恰相反 ,质量浓度增大 ,白度增大 ,当STPP质量浓度达到一定值时 ,作用反而更显著 ;MgSO4 很敏感 ,在窄区间有一峰值 ;Na2 SiO3 的用量在 2 5 %以内时 ,白度升高的趋势很强 ;TAED对PC起活化作用且和温度有关。最后设计出一个配方与标准粉比较去污比值是 2 2 1。     

注塑机拉杆三角螺纹端卸载槽的多目标优化

针对注塑机拉杆三角螺纹在近卸载槽处发生早期断裂的问题，在用ANSYS软件对近卸载槽处三角螺纹进行有限元分析的基础上，就拉杆三角螺纹端卸载槽的几何特性建立参数优化模型，以控制三角螺纹在近卸载槽附近的最大应力、卸载槽的最大应力以及卸载槽加工量最小化为统一的目标函数。通过对拉杆在单向拉伸力作用下的多目标优化，可使拉杆三角螺纹牙根在卸载槽处的最大应力降低55％，在偏载作用下，其最大应力降低21．4％。在单向拉伸力作用下，拉杆卸载槽的最大应力比平均单向拉伸应力提高26．5％，使卸载槽能够较好地发挥其卸载的作用。     

Effect of the mechanical failure of catalyst pellets on the pressure drop of a reactor

The effect of the mechanical failure of catalyst pellets on the pressure drop across a laboratory-scale catalyst packing has been examined by experiment. Results reveal that, along with the mechanical failure of the pellets, there exists a point of maximum curvature around which the slope of pressure drop increases rapidly. This rapid increase is attributed to a mutation of the packing structure, occurring as the amount of failed pellets reaches a certain critical value. The secondary breakage of the pellets contributes much to the mutation of the packing and to the pressure drop. It has been observed that a trilobite catalyst is more susceptible to a mechanical stress than a cylindrical catalyst, and that a catalyst with a smaller diameter is much easier to result in an increase in the pressure drop. The measurement of the pressure drop across a laboratory-scale catalyst packing as the failure of pellets under a mechanical stress has a satisfactory reproducibility, and has a close meaning to the mechanical reliability of a fixed bed converter, and hence is recommended as a method for catalyst assessment. The multi-scale and multi-disciplinary nature of catalyst mechanical reliability is also discussed.     

A Self-Delamination Method of Measuring the Surface Energy of Adhesion of Coatings

A self-delamination technique is presented to assess the surface energy of adhesion of coatings. By measuring the debond area resulting from a circular hole cut in a film adhered onto a substrate, the surface energy may be determined if the tensile modulus, Poisson's ratio and residual stress level of the film are known. This method is useful for coating thicknesses greater than a critical thickness for self-peeling. Using this technique, the surface energy for a polyimide film (cured up to 220°C) on a glass plate was determined to 3.2 Nm^-1.     

转子挤压组合凹模的应力分析

组合凹模的应力分析是一个非常复杂的问题，对其进行精确分析是解决模具寿命的关键。本文采用有限元分析软件Ansys对转子的组合凹模进行了分析，为转子组合凹模的优化设计提供了依据。     

三种芦荟胶的保湿功能评价

利用一种操作简便和科学性较强的化妆品原料及人体皮肤保湿功能评价方法,运用Corneometer在1组共30名健康受试者中对3种试验物（芦荟胶）进行检测,并将结果分析研究,对这3种芦荟胶保湿试验物进行了保湿功能评价。提出用Corneometer来评价保湿功能是一种具有较高敏感性、重复性和适用性的客观评价方法。     

Measurement of foaming of frying oil and effect of the composition of TG on foaming

We describe a method developed to quantify the amount of foam in frying oils. In this method the foam was quantified by digitizing photographic images that were taken continuously at 1-s intervals; spots showing more than a certain luminance were considered as foam. The ratio of total foaming area to the whole oil surface was integrated to obtain the intergration of foam (IF) index as a parameter of the extent of foaming. There was a good correlation between this method and the visual evaluation done by a group of panelists. Furthermore, the foaming tendency correlated with the distribution of TG by M.W. when the IF was plotted against the foam index of TG (FIT), which reflects the M.W. distribution. A correlation was found between the FIT value of oil and foaming on frying, indicating that when the FIT value is small, the oil foams less. Based on the results of this investigation, we have designed a method to obtain edible oils consisting of medium-chain FA that not only are nutritious but also have good cooking properties.     

Kinetics of thermal liquefaction of coal

A model is presented for the kinetic study of the thermal liquefaction of Belle Ayr subbituminous and Burning Star bituminous coals with anthracene oil, hydrogenated anthracene oil and hydrogenated phenanthrene. All experiments were performed in a continuous-feed, stirred tank reactor, at a temperature of 450 °C and a space time of approximately 5 to 55 min. A kinetic model which includes a reaction: coal + oil→more reactive coal, correlates the data reasonably well. This reaction explains the net consumption of anthracene oil during the initial stages of liquefaction. Such a reaction may account for a portion of the swelling of coal at low space times and the sizable increase of viscosity of reaction slurry during these initial stages of liquefaction. It is also observed that the yield of oil increases when solvents of increasing hydrogen donor capacity are used.     

木质素氧化降解制备酚类化合物研究进展

木质素作为可再生资源被认为是最具有潜力的苯酚替代物用于制备酚醛树脂,作为制浆造纸工业副产品,木质素来源丰富且低毒,但是木质素具有三维空间网状结构,分子量大,反应活性低。到目前为止,很多方法(如热化学转化、热裂解、液化、超临界水处理、氧化、还原和水解等)用于将大分子木质素降解为小分子物质,得到的小分子物质中含有重要的化工中间体可以用来制备多种产品。本论文综述了木质素氧化降解得到酚类物质的研究现状,并展望了木质素工业化的应用前景。     

Evaluating the performance of a cascade of two bioreactors

We investigate a reactor network consisting of two chemostats in series. Previous researchers have compared the performance of a two-reactor system against a single reactor having the same total residence time. In this paper, we suggest that it is more natural to compare the performance of a cascade against the optimal performance a single-reactor system having the same, or smaller, residence time.We consider a biological system in which the growth rate is given by a Monod expression with a variable yield coefficient. We find that it is possible for this model to obtain a significant increase in performance by using a two-reactor system. However for the two-reactor system the performance enhancements are achieved when the system reaches a time-invariant steady-state rather than under conditions which produce self-generated oscillations, which was the focus of interest of earlier researchers.