一体式膜生物反应器处理中药废水的试验研究

针对中药废水具有COD高,水质变化大等特点,采用一体式膜生物反应器(MBR)对中药废水的厌氧反应器出水进行处理,在固定水力停留时间(HRT)为5 h的条件下,考察了进水COD质量浓度及污泥质量浓度(MLSS)与COD去除之间的关系.结果表明,当HRT为5 h,进水COD质量浓度小于3 000 mg/L时,膜出水COD小于30 mg/L,满足中水回用标准;当进水COD质量浓度为3 000～6 000 mg/L时,膜出水COD大于30 mg/L而小于100 mg/L,满足污水排放标准;当进水COD质量浓度大于6 000 mg/L,膜出水COD大于100 mg/L,不能满足污水排放标准.同时污泥质量浓度(MLSS)与COD去除的关系表明,为了达到更好的COD去除率,MBR的最佳MLSS应控制在7 543 mg/L.     

膜-好氧组合工艺处理餐饮废水的研究

采用无机膜－好氧组合工艺对高浓度餐饮废水（COD15000mg/L)进行处理，考察进水COD浓度，溶解氧浓度，水力停留时间对好氧反应器处理效果的影响，结果表明，当水力停留时间大于5．6h时，废水的COD去除率高于90％，温度对处理效果影响不大。对好氧出水用无机膜进行分离，最终出水COD小于25mg/L，浊度小于1NTU。     

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。     

UBF-砂滤工艺处理城市污水实验研究

采用UBF-砂滤工艺处理城市污水,成功地进行污泥颗粒化.在进水COD为150-600mg L,自然室温为26-30℃,水力停留时间为8h时,UBF-砂滤系统出水COD浓度小于60mg L,pH值接近7.     

红霉素生产废水处理试验研究

利用UASB反应器处理红霉素废水试验运行结果表明:通过控制进水中COD浓度和对厌氧污泥有效的培养驯化,红霉素生产废水可以被有效处理,进水COD为6700-7500mg/L,出水COD为820-1000mg/L,反应器水力停留时间25h,容积负荷达到3-4.5kgCOD/(m3.d),COD去除率达到88%.     

ABR-生物接触氧化工艺处理低碳氮比污水的碳源调配

低碳氮比生活污水由于碳源不足,采用传统A/O工艺处理难以出水达标.采用改进的ABR-生物接触氧化工艺对低碳氮比污水进行实验,通过优化运行参数,合理调配碳源,提高碳源利用率,确定了不同m(COD)/m(N)条件下该工艺对污水的处理效果.研究结果表明:改进的ABR-生物接触氧化工艺能有效提高碳源利用率和脱氮效率;在水力停留时间为10h,混合液回流比为2.5,温度为30℃时,系统碳源利用率和TN去除率达到最高;在不同m(COD)/m(N)条件下,TN去除率随着m(COD)/m(N)的减小而迅速降低.当进水m(COD)/m(N)为2～4时,TN去除率低于60％,处理效果不理想:当进水m(COD)/m(N)约为5时,TN去除率达到71.3％,出水TN质量浓度小于20 mg/L,满足排放标准要求;当m(COD)/m(N)为6～7时,TN去除率大于80％,出水TN质量浓度小于15 mg/L.     

高pH值条件下ABR工艺处理印染废水中试试验研究

对厌氧折流板反应器(ABR)处理难降解印染废水进行中试研究.结果表明,ABR反应器可以控制的水力停留时间(HRT)较短(11~12 h),承受的pH值范围较广(6.5~10.3).在进水COD、BOD质量浓度波动较大(700~1 500 mg/L,300~700 mg/L),高进水pH值,低HRT的情况下,ABR对COD、BOD的平均去除率分别为30%和15%,印染废水的BOD/COD由0.52提高到0.65,废水可生化性明显改善.     

好氧颗粒污泥膜生物反应器处理畜禽废水

采用好氧颗粒污泥膜生物反应器处理畜禽废水,分别对COD、NH4 -N、NO2--N、NO3--N的去除效果和对膜通量的影响进行了研究。结果表明:在水力停留时间(HRT)为8h,进水COD浓度为600mg/L,NH4 -N浓度为40mg/L的条件下,出水COD、NH4 -N的浓度分别为46.6和4.8mg/L。NO2--N和NO3--N的去除率也可达90%以上。并且好氧颗粒污泥的加入减缓了膜的污染。     

海绵铁微电解法去除生活污水中COD的研究

采用单因素法对海绵铁微电解法去除生活污水中COD过程中5个工艺参数(水力停留时间、进水COD浓度、进水pH值、海绵铁投加量)的影响进行了研究;在此基础上,进行了5水平、6因素的正交试验,得到最佳反应条件为:反应时间5min、pH值2、海绵铁投加量5g/L、进水COD浓度200mg/L时,COD去除率为45.3%,达到城市污水作为预处理阶段的目的。     

复合式折流板厌氧反应器处理城市污水

采用弹性立体填料的复合式折流板厌氧反应器处理城市污水 .研究结果表明 ,该装置处理城市污水效果显著 .当进水COD在 87- 32 0mg L范围内 (平均 2 2 7mg L)变化 ,水力停留时间大于 5 .2h ,反应系统的容积负荷小于 0 .86kgCOD (m3·d)时 ,常温下COD去除率大于 6 0 % ,出水COD平均为 81mg L ,SS去除率大于77.8% ,出水SS小于 30mg L ;反应系统在试验条件下温度与溶解性COD去除率成正相关 .试验还得出了系统处理城市污水溶解性BOD去除率随HRT变化的降解动力学模式 .     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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.     

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.     

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。     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that