改性沸石作为BAF填料处理生活污水的研究

沸石分子筛因其特殊的结构特性对氨氮具有较高的吸附性能.将天然斜发沸石在250℃下高温改性,并用于含氨氮溶液的等温吸附处理,获得了在不同氨氮初始质量浓度下的改性沸石等温吸附曲线.根据朗格缪尔吸附理论拟合得到改性沸石的等温吸附方程1/qe=7.589 86/Ce+0.137 39,并求得其对氨氮的理论最大吸附量qm为7.278 6 mg/g.通过对沸石曝气生物滤池系统在不同水力负荷和气水比条件下的运行研究,总结出改性斜发沸石作为曝气生物滤池工艺的最佳水力负荷为0.15～0.25m3/(m2.h),气水比为20∶1.     

A/O两段式曝气生物滤池处理高盐度富营养化水体试验研究

针对常规生化工艺对富营养化高盐度水体处理效果不佳的现状,设计研发出一种新型A/O两段式曝气生物滤池工艺,通过筛选驯化耐盐高效菌和滤料改性等措施,并对相关工艺参数进行优化,提高工艺对高盐度富营养化水体处理效果。试验结果表明,该工艺对于盐度范围为5 000~20 000 mg/L的富营养化水体具有良好的处理效果,当回流比100%、水力负荷4 m3/(m2·d)、曝气强度0.4 m3/h、温度15~35℃、pH=7~8的条件下,可实现对COD、NH3-N、TN、TP的去除率分别达到90%、95%、80%、80%以上。     

二级曝气生物滤池处理城市污水的研究

以球形陶粒为曝气生物滤池的生物载体,进行城市污水处理的半工业试验,考察了滤速、气水比、冲击负荷、反冲洗等因素对曝气生物滤池工作性能的影响。结果表明：在装置规模为12m^3／d,水温为(20-23．5)℃,滤速为(6．09～8．21)m／h,碳化柱和硝化柱气水比分别为1：1和2：1,进水COD为(120-338)mg／L,NH4^ -N为(30．0～53．6)mg／L的条件下,出水达到生活杂用水的标准;冲击负荷和反冲洗对滤池出水水质没有显著的影响。     

曝气生物滤池在校园生活污水处理中的试验研究

气水比是影响曝气生物滤池处理效果的一个重要因素,试验通过改变气水比的值,比较CODCr、NH3-N和浊度的处理效果。研究结果表明:在以活性炭作填料的曝气生物滤池中,其最佳处理效果的气水比为4∶1,此气水比下的CODCr去除率为94.51%,NH3-N去除率为90.75%,浊度值为1.11NTU(Nephelometric Turbidity Unit,NTU)。出水中CODCr的浓度为13.44mg/L,NH3-N的浓度为3.12mg/L,出水效果较好。     

曝气生物滤池及其填料性能

为提高曝气生物滤池(BAF)处理废水的效率,以沸石、活性炭、建筑陶粒、工程陶粒作为填料测试气体流速、水力停留时间(HRT)、进水有机负荷对生物滤池的化学需氧量(COD)、NH3—N的去除效果及出水浊度的影响。结果表明:在水力停留时间为1.5h、进水COD为150mg/L、有机负荷为2.41kgCOD/(m3·d)时,两种陶粒出水COD均小于25mg/L;当进水有机负荷为0.74kgCOD/(m3·d)时,工程陶粒出水COD小于10mg/L;工程陶粒是曝气生物滤池填料的最佳选择。     

上流式曝气生物滤池脱氮性能研究

文章对单级上流式曝气生物滤池的脱氮性能进行了初步研究。研究结果表明,在进水有机负荷为4～12kgCOD/(m3·d)、水力负荷1～4m3/(m2·h)及气水比1∶1～5∶1的工艺条件下,COD和NH3-N的去除率达到70%～86%和53%～79%。在水力负荷较低时,控制气水比可以实现同步硝化反硝化。     

曝停组合对ABIR处理城市污水性能的影响

对连续流间歇曝气技术在活性污泥-生物滤池一体化反应器(AB IR)处理城市污水性能进行了研究,考察了在活性污泥段稳定运行条件下,生物滤池段在不同曝气-停曝时间组合下的整个反应器处理城市污水的性能.研究表明,反应器温度为20℃,活性污泥段负荷为0.4 mgCOD/mgMLSS.d,滤池段C/N为1.32、DO控制在1.0 mg/L、曝气-停曝时间为2 h/1 h时,反应器出水COD、SS、NH4+-N以及TN值均能达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级标准的B标准.     

BAF单系统处理玉米青贮渗出液主要影响因素分析

采用单级曝气生物滤池系统处理玉米青贮渗出液,考察水力负荷、气水比、有机负荷和滤床高度对BAF系统运行的影响.研究结果表明:当水力负荷从0.5 m3/(m2·h)升高到3.0 m3/(m2·h)过程中,COD和NH3-N的去除率先升高后降低,当水力负荷为1.5 m3/(m2·h)时,COD和NH3-N的去除率达到最大,分别为83.5％和74.9％;增加气水比使得系统中溶解氧充足,可明显提高COD和NH3-N去除率,当气水比为3.5∶1时,COD和NH3-N的去除率达到最大,分别为87.5％和75.2％;低有机负荷不利于COD和NH3-N的去除,当有机负荷(以COD计)为2.4kg/(m3.d)时,COD和NH3-N去除率分别为49.6％和58.5％,但过高的有机负荷对NH3-N去除率影响较大,当有机负荷为7.2 kg/(m3·d)时,NH3-N去除率为61.7％;滤床高度对硝化反应去除NH3-N影响较大,NH3-N生物硝化反应去除行为主要发生在0.6～1.0 m区域,因此,适当增加滤床高度可以提高NH3-N去除率;采用BAF系统处理玉米青贮渗出液是可行的,为同类废水处理和控制农村水环境质量提供借鉴.     

高炉瓦斯灰曝气生物滤池填料的制备及其性能研究

以高炉瓦斯灰为主要原料、粘土和硅酸钠作为添加剂制备曝气生物滤池填料.通过正交试验得出高炉瓦斯灰曝气生物滤池填料的最佳制备工艺条件为：高炉瓦斯灰、粘土、硅酸钠质量分数分别为79%，15%，6%，烧制温度为600℃. 该曝气生物滤池填料具有密度较小、强度较大、比表面较大等特点，将其应用于曝气生物滤池处理酱油废水，在水力停留时间为4h、气水比6∶1、滤层高度为100cm的情况下，COD的去除率达到70.3%，NH3-N的去除率达到74%，色度的去除率达到60%，取得了较好的处理效果. 利用高炉瓦斯灰制备曝气生物滤池填料，为高炉瓦斯灰的资源化利用探索了一条新途径.     

凹凸棒滤料曝气生物滤池对微污染原水的处理研究

利用具有典型分形特征的凹凸棒滤料作为填料,进行曝气生物滤池（BAF）处理微污染原水实验,根据滤料的挂膜性能,分析曝气生物滤池对微污染水的处理效果。结果表明：孔隙率3388 %,分形维数314的凹凸棒滤料曝气生物滤池,在水力负荷17 m3/ (m2·h)、水力停留时间90 min、气水比1〖DK〗∶1～12〖DK〗∶1、水温216～327 ℃条件下,20 d左右即可完成挂膜过程,自然挂膜容易,时间短,说明分形维数314的凹凸棒滤料表面较为粗糙,有利于微生物附着。正常运行阶段,曝气生物滤池对CODMn、NH3-N和浊度的平均去除率分别可达1466 %、8581 %和5300 %。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.