连续投加微生物絮凝剂促进厌氧污泥的颗粒化

将升流式厌氧污泥床(UASB)反应器在(35±1)℃下运行102天处理低浓度废水,研究微生物絮凝剂对厌氧污泥颗粒化的影响.结果表明:投加微生物絮凝剂或阳离子PAM(聚丙烯酰胺)对厌氧污泥颗粒化具有促进作用;连续投加微生物絮凝剂的反应器1(R1)运行43天后,容积负荷达3.8 g/(L.d)(以单位容积反应器每天的化学需氧量负荷计),而投加阳离子PAM的反应器2(R2)和对照反应器3(R3)达到同样的容积负荷分别需要44和98天;R1中的颗粒污泥在沉降性能和产甲烷活性方面优于R2中的颗粒污泥;实验结束时,R1,R2和R3的COD去除率分别为94.5%,91.7%和84.0%.     

酸洗废液改性粉煤灰除磷的试验研究

利用酸洗废液改性粉煤灰进行了抗生素废水除磷的试验研究,考察了粉煤灰改性时固液比、改性粉煤灰投加量、溶液pH值等因素对除磷效果的影响。试验结果表明:粉煤灰改性时固液比对其处理效果影响不大,当溶液pH值为4~10,改性粉煤灰投加量为2.5g/L时,处理后水中磷酸盐浓度为0.1~0.26mg/L,磷酸盐的去除率为98.82%~99.59%。并对改性粉煤灰的除磷机理进行了初步探讨。     

复合絮凝剂(PAC+PAM+磁粉)处理热轧废水的试验研究

将磁粉与聚合氯化铝(PAC)、聚丙烯酰胺(PAM)联用组成复合絮凝剂来处理热轧废水。在改变絮凝剂各组分投加量的条件下进行絮凝试验,分析热轧废水的浊度和含油量变化,研究复合絮凝剂的最优投加方案。试验结果表明,当磁粉、PAC和PAM的投加量分别为5mg/L、15mg/L和1.5mg/L时,热轧废水的净化效果最佳,其浊度由82.6NTU降为10.5NTU,含油量由15.62mg/L降为7.44mg/L。     

UBF生物铁反应器处理高浓度印染废水试验研究

对用UBF生物铁反应器处理高浓度印染废水时的运行参数进行了试验研究.结果表明,当进水ρ(CODCr)为1500mg/L左右,色度为400～600倍,pH值为8 0～9 0,控制水温为28～32℃,UBF反应器的HRT>24 0h时,适宜的ρ(Fe2+)为9 0～10 0mg/L.在此情况下,UBF反应器的CODCr去除率为53 74%、色度去除率为76%～80%,与不投加铁离子时相比,CODCr去除率提高了20%～30%,同时厌氧段出水pH值为7 5;厌氧UBF生物接触氧化工艺的CODCr总去除率为79 41%、色度总去除率为84%～88%.     

改性粉煤灰去除废水中Pb(Ⅱ)的研究

通过NaOH处理粉煤灰制备了改性粉煤灰,研究了溶液pH值、改性粉煤灰投加量、Pb(Ⅱ)初始质量浓度和吸附时间对废水中Pb(Ⅱ)去除效果的影响。结果表明,改性粉煤灰对Pb(Ⅱ)的去除性能明显优于粉煤灰。在25℃,pH值为4.5,改性粉煤灰投加量10g/L,吸附30min时,对初始质量浓度为50~200mg/L的Pb(Ⅱ)去除率均可达99%以上。改性粉煤灰对Pb(Ⅱ)的吸附过程符合Langmuir吸附等温方程和准二级反应动力学特征,且是自发的吸热过程,高温有利于吸附过程的自发进行。     

混凝沉淀处理煤制甲醇废水的实验研究

为进一步提高煤制甲醇废水中SS及COD的去除效果,采用混凝沉淀工艺对煤制甲醇废水进行预处理。通过混凝搅拌实验分析混凝剂加药量、混凝时间、PAC与PAM复配投加对浊度及COD去除效果的影响。结果表明:在PAC、PAFC及PFS三种混凝剂中,最佳混凝剂为PAC;在PAC加药量为60 mg/L的情况下,最佳混凝时间为20~25 min;在PAC投加60 mg/L、非离子型PAM投加0.2 mg/L、混凝20 min的条件下,PAC与PAM复配投加可避免胶体再稳,并将浊度及COD的去除率分别提高至81.8%和12.5%。     

氯化铝改性粉煤灰对活性染料废水的处理效果

为了有效处理印染行业的废水,制备了氯化铝改性粉煤灰并用其处理活性翠兰废水,探讨了氯化铝浓度、氯化铝改性粉煤灰投加量、处理废水的搅拌时间及活性翠兰废水p H值对处理效果的影响,得到结论:制备氯化铝改性粉煤灰时,使用氯化铝的浓度为0.1mol/L时,对活性翠兰废水的处理效果最佳;用制备的氯化铝改性粉煤灰处理活性翠兰废水时,氯化铝改性粉煤灰用量为20 g/L,搅拌时间为30 min,p H值为10时,处理活性翠兰废水的脱色率为68%,COD去除率为75%,达到最佳值。     

基于磷酸盐还原过程的食品发酵废水厌氧除磷工艺研究

采用具有磷酸盐还原功能的菌株,对模拟的食品发酵废水进行厌氧除磷工艺研究。通过向厌氧反应器投加前期筛选得到的磷酸盐还原菌进行污泥驯化、正交试验和单因素实验,确定食品发酵废水厌氧除磷工艺的最佳工艺条件。研究结果表明:经过12个周期的驯化,使投加菌株的污泥具有良好的生化和除磷性能,反应器出水CODCr和总磷质量浓度分别为319.60mg/L和13.58mg/L,相应去除率分别为69.43%和20.95%。厌氧除磷工艺最佳工艺条件为培养温度30℃、pH值为7、氮源为蛋白胨+NH₄Cl+NaNO₃,总磷质量浓度为17.5mg/L,总磷去除率可达37.96%,产生的PH₃的磷含量占总磷去除量的24.61%。     

铁离子对内循环厌氧反应器运行效能的影响

内循环厌氧反应器是第三代高效厌氧反应器.Fe2 离子对反应器的颗粒污泥活性具有较明显的影响,投加Fe2 离子质量浓度在2～10 mg/L时对颗粒污泥活性都产生明显的促进作用,其最佳投放质量浓度为5 mg/L;连续流IC反应器运行结果表明,Fe2 离子可以有效地提高IC反应器的运行效能,采用5 mg/L的投加质量浓度,可使反应器的产气量由29.6 L/d增加到38 L/d,COD去除率从近80%提高到90%左右,提高幅度分别为25%和10%.     

有机改性膨润土的制备及甲基橙废水脱色工艺研究

以十八烷基三甲基氯化铵（1831）为改性剂,制得有机阳离子改性膨润土．研究了有机膨润土投加量、吸附时间、废水pH值及废水初始浓度对甲基橙废水脱色率的影响．实验结果表明,有机阳离子改性膨润土投加量为1．5g／L,吸附时间为60min,废水pH值为8．0,废水初始浓度为100mg／L时,有机阳离子改性膨润土对甲基橙废水的脱色率达到98．08％．     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with