CIBR处理模拟生活污水的效果及菌群分析

实验采用连续流一体化生物反应器(CIBR)处理模拟生活污水。考察CIBR对污水的处理效果,并采用高通量测序分析取自污水处理厂的接种污泥与驯化完后CIBR中活性污泥的菌群组成结构。结果表明,CIBR能高效处理模拟生活污水,COD、NH_4~+-N、TN和TP的去除率分别达到90.9%、94.9%、83.1%和71.2%;在门级菌群中,接种污泥和CIBR活性污泥中的优势菌种均为Proteobacteria和Bacteroidetes,但在属水平上,两个生物系统中好氧菌、兼性菌、反硝化菌、氨氧化菌、亚硝氮氧化菌和聚磷菌在种类和相对丰度上存在明显差异,这可能与运行工况和进水水质不同有关。     

曝气生物滤池处理生活污水的实验研究

采用陶粒为滤料的曝气生物滤池处理生活污水,考察水力停留时间(HRT)、曝气量、pH值对处理效果的影响.实验结果表明,在水力停留时间为3~6 h时,对出水COD去除率可达83.7%~90%,对氨氮去除率可达85%以上;在曝气量为0.08~032 m3/h时,对出水COD去除率可达到83.4%~86.8%,出水氨氮最高去除率可达85.2%.pH值在6.57~8.72之间对COD、氨氮基本没有影响.曝气生物滤池处理的生活污水出水COD、氨氮均可达到国家二级出水的标准.     

生物砾间接触氧化反应器中原核生物多样性及其对剩余污泥减量化的贡献

采用分子生物学手段，通过构建16S rRNA基因文库，对新型剩余污泥减量化处理技术——生物砾间接触氧化反应器 （GCOR） 中悬浮颗粒的原核生物多样性进行了系统发育分析，并讨论了多种原核生物共存对剩余污泥减量化的贡献. 结果表明，颗粒的原核生物可分为好氧呼吸菌群与厌氧水解发酵菌群两大类. 其中，优势菌群分别是以呼吸代谢为主的假单胞菌属和以发酵为主要代谢方式的拟杆菌/噬纤维菌菌属，它们的16S rRNA序列各占文库的17%.此外，好氧菌群中还发育有α蛋白菌、β蛋白菌、γ蛋白菌、亚硝化螺菌属、土壤杆菌属、衣原体属、葡萄糖杆菌属及褐色高温单孢菌属细菌；厌氧菌群中则发育属于螺旋体属、δ蛋白菌、反硝化菌、乳杆菌属、真杆菌属的原核生物.反应系统中两大相反环境多种原核生物的共存，为在降解污水有机物的同时，达到剩余污泥减量化做出巨大贡献.     

MBR提高A/O工艺污水脱氮效果的研究

在A/O工艺系统中组合膜生物反应器(MBR)处理养猪污水,研究混合液污泥质量浓度(MLSS)、氨氮负荷(AL)、碱度、DO与HRT等因素对脱氮的影响.结果表明,通过MBR系统提升MLSS,可提高A/O工艺的脱氮效果,并可减少反应HRT及DO与碱度的消耗.     

UASB反应器在常温条件下处理生活污水的试验研究

在常温条件下,进行了升流式厌氧污泥床反应器(Upflow Anaerobic Sludge Blanket简称,UASB)处理生活污水的试验研究。试验结果表明:在温度为15℃～29.2℃,HRT为6h～24h时,UASB处理生活污水有良好的处理效果,COD的去除率为60.7%～96.6%。HRT和进水浓度是影响UASB反应器处理生活污水的因素,缩短HRT会引起COD去除率的下降,提高进水COD浓度,COD去除率增加。HRT是影响COD去除率的一个重要因素。     

两段BAF处理生活污水中试研究

采用两段曝气生物滤池处理生活污水进行了试验研究,探讨了不同的水力停留时间(HRT)对处理效果的影响.结果表明:HRT为1～4 h时,进水COD质量浓度98～154.2 mg/L 的条件下,COD的去除率平均为74.1%,SS的去除率平均为84.5%,NH3-N去除率平均为55.4%,出水COD降至18.6～50.4 mg/ L,SS降至4.8～14 mg/ L,NH3-N降至1.7～28.4 mg/ L;发现NH3-N随着HRT变化较大,COD和TSS变化不显著.同时对第二段生物滤池内生物相特征进行了深入研究,并试验出该系统处理生活污水各段最佳的反冲洗周期.     

厌氧污泥接种好氧反应器处理生活污水的启动研究

以模拟乡镇生活污水为处理对象,利用厌氧污泥接种启动好氧小试反应器,采取连续进水连续曝气的方式,进行构建好氧生物处理系统,考察驯化过程反应器中污染物的去除效率.实验结果表明:常温条件下,模拟生活污水进水量为4 L/d,HRT(水力停留时间)为12 h,进水均值COD(化学需氧量)为400 mg/L,NH~+_4-N(氨氮)为20 mg/L,TN(总氮)为25 mg/L,TP(总磷)为4 mg/L,运行12 d,实验出水COD为39.80 mg/L,NH~+_4-N为0.98 mg/L,TN为8.32 mg/L,TP为0.96 mg/L;运行29 d,COD、NH~+_4-N平均去除效率均可稳定达到90.0%,活性污泥生长良好,初步构建好氧生物处理系统.     

EM复合培养液对生活污水的净化作用

试验以EM复合培养液处理北方城市生活污水,确定了最佳工艺条件为:EM复合培养液接种量0.1‰～0.3‰;pH7.5～8.0;曝气时间为HRT/3.最终对生活污水中COD去除率可达到80%以上.     

复合菌剂处理深井聚磺钻井液废水技术研究

深井聚磺类钻井液废水中有机物含量高,可絮凝性差,降解难度大.开展了高效复合菌剂处理废水的技术研究,重点分析了复合菌剂优选、菌剂用量、曝气量等因素对处理效果的影响.结果表明:优势菌剂加量为0.5 g/L,曝气量为0.25 L/min,进水ρ(COD)<1 100 mg/L,污泥沉降比(SV)为25%～35%时,24 h后系统COD总去除率大于87%,处理后的水ρ(COD)≤150 mg/L,其他指标均达到《污水综合排放标准》的1级标准.     

简述CAST工艺的除磷及控制

本文通过对采用CAST工艺处理生活污水的驿岗污水厂运行实践中,对水质监测及控制,考察了进水水质、污泥浓度、曝气量的控制除磷效果的影响。结果表明：污泥浓度、曝气量是影响除磷效果的重要因素;控制好处理过程中的污泥浓度和曝气量,聚磷菌吸磷与释磷速率升高。     

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.     

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