共查询到20条相似文献,搜索用时 125 毫秒
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复合菌剂用于膜生物反应器的污泥减量试验研究 总被引:1,自引:0,他引:1
将复合菌技术与膜生物反应器结合处理校园生活废水,考察其污泥减量的效果.试验结果表明,反应器内MLSS的质量浓度由投加微生物前的9 000 mg·L~(-1)降到了投加后的5 000 mg·L~(-1),MLSS降低了44.4%,MLVSS同MLSS的变化基本一致;m(MLVSS)/m(MLSS)的变化不是很大,投加微生物后的m(MLVSS)/m(MLSS)较没投加前的平均0.83略有提高;而对COD、NH_4~+-N、TP的平均去除率分别由未投加时的93.78%,78.38%、75.56%增大到96.03%、88.25%、84.79%,所有指标都有所提高.研究表明,利用膜生物反应器(MBR)对泥水高效分离的特点,通过投加复合菌剂,抑制了不利菌和"无用菌"的生长,改善污泥性能和代谢活性,可以在实现MBR污泥零排放的同时,提高系统的去污能力. 相似文献
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《水处理技术》2017,(11)
采用3组动态膜生物反应器(DMBR)分别投加不同量的粉末活性炭(PAC)同时运行平行实验的方法,考察投加PAC对长期运行的PAC-DMBR复合工艺处理生活污水的效果及对污泥混合液特性的影响。结果表明,投加PAC后强化了PAC-DMBR对污染物的处理效果,COD、氨氮、TP、UV_(254)和色度的去除率均有提升。PAC投加量为3g/L时运行效果最好,稳定通量增加且运行周期延长,浊度在30 min内即降至1 NTU以内,且出水水质更好。投加PAC后改善了污泥混合液特性,促进了动态膜的形成过程及结构改变,主要表现为投加PAC后污泥粒径均有增大,污泥混合液沉降性能更好,EPS含量降低且比好氧速率有轻微提升。 相似文献
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《应用化工》2016,(1):35-39
将动态膜技术与悬浮填料相结合构建HDMBR(复合式动态膜生物反应器),采用HDMBR工艺处理印染废水,比较了投加粉末活性炭(PAC)对印染废水处理效能的影响。结果表明,投加PAC的反应器复合式动态膜性能、对污染物去除效果更好。系统稳定运行时,投加和未投加PAC反应器分别标为反应器A和B。A反应器对COD、UV_(254)、色度和浊度的去除率分别为96.20%,88.92%,92.12%,94.81%,分别比B反应器高2.16%,4.66%,5.65%,3.04%。三维荧光光谱解析表明印染废水经HDMBR处理,废水中溶解性有机物(DOM)的荧光峰强度沿程逐渐减弱,投加PAC可强化对DOM的去除。 相似文献
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The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion. 相似文献
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A. S. Stankevich R. R. Gilyazetdinov N. K. Popova D. A. Koshkarov 《Coke and Chemistry》2008,51(9):357-363
A model is developed for predicting the postreactive strength CSR and reactivity CRI of coke. The model adequately reflects the dependence of these characteristics on the chemical and petrographic parameters of the coal batch, taking account of the batch preparation and coking period, as well as the slaking method. 相似文献
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从离子膜法烧碱整流装置的保护原理出发,通过对某工厂在2005年整流装置跳闸原因的统计和技术分析,发现电网波动和雷击是整流装置跳闸的两个重要原因,并提出了采取修改整定值、增加防晃电交流接触器以及在低压交流侧增加三级防雷措施的整改对策。整改后,整流装置跳闸次数明显减少。 相似文献
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我近两年花了很多时间喝茶,我想梳理出两个对象,一个是中国茶,一个是中国漆。茶和漆在某种层面上是完全一样的,这是我的心得。从这两个对象延伸到美术教育范畴,那就是关于“中国物质”的唤醒,这将是中国美术学院中国漆艺术专业要作的重要工作甚至是历史使命。“中国物质”这个话题比较严重,也比较复杂,我为什么会讲到那么复杂的一个话题,或者看上去那么崇高的话题,是因为我们现在面临一个很重要的国际化背景,就是中国制造,或者中国设计,中国设计和中国制造没有对称关系,制造和设计是对立的关系,或者二元的关系,所以我想这问题比较麻烦。我们现在中国制造的潜台词就是垃圾货,或者便宜货不安全的,所以我会在这个话题上跟漆引发话题。假设中国制造确实存在负面价值的话,那什么东西可能是正面的呢?假设有一种形态可以跟中国制造来匹配的话,我想有两个东西可以和它对接,那就是“中国文化”和“中国物质”,可能有很多的东西中国人已经遗忘了,而这些东西在当代生活中可能具有很强的应用价值,我指的是产品及其使用方法,它可能不具备中国制造的负面,比如说低级、廉价、不安全,中国有这样一大批的东西具有价值,其中包括中国漆、中国茶,这是物质。假设我们从物质出发,我们会进一步引... 相似文献
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Thermal Decomposition of the Oxynitride of Germanium and the Heat Capacity of the Oxynitrides of Silicon and Germanium 总被引:1,自引:0,他引:1
Using the mass spectrometry-effusion cell technique, Ge2 N2 O has been found to decompose under equilibrium conditions according to Between 850 and 1000 K, the free energy change for this reaction is given by The heat capacities of Gez N2 O and its silicon homolog between 296 and 738 K have been determined using differential scanning calorimetry. From these results it has been found that 相似文献