奥贝尔氧化沟处理城市污水工程实例分析

氧化沟工艺是传统活性污泥工艺的一种变形,综合了推流式和完全混合式优点,因此又被称为连续循环曝气池,奥贝尔氧化沟是其中之一。该工艺起源于南非发展于美国,我国上世纪80年代引进了这门技术,随着采用该工艺的污水处理厂的日益增多。其优越性得到了充分的展现和认可。本文对奥贝尔氧化沟处理城市污水工程实例进行了分析。     

氧化沟工艺在污水处理中的应用与研究新进展

本文介绍了氧化沟工艺在我国污水处理中的应用和新进展-借鉴于卡鲁塞尔氧化沟、一体化氧化沟和奥贝尔氧化沟等工艺优势而集成的改良型氧化沟,并对该工艺优化进行了理论分析.     

奥贝尔氧化沟工艺调试与运行参数探讨

文章介绍了奥贝尔氧化沟工艺技术在太原市北郊污水净化厂改扩建工程中的工艺调试过程与运行参数控制.     

氧化沟工艺处理城市污水及中水回用

结合南昌象湖污水处理厂工程,介绍了在城市污水处理厂中氧化沟工艺结构、原理及运行特点,分析了其运行情况和效果,并分析了城市污水中水回用的工艺及运行效果。     

氧化沟处理城市污水的同时硝化反硝化研究

采用有效容积为330L的氧化沟模型,以城市污水为研究对象,研究了Orbal氧化沟中的同时硝化反硝化生物脱氮现象.实验结果表明,在不投加外碳源和不设硝化液内回流的条件下,通过控制氧化沟溶解氧浓度及分布,可以实现氧化沟外沟道内的同时硝化反硝化生物脱氮,TN去除率最高可达86％.分析认为,溶解氧浓度及分布是氧化沟同时硝化反硝...     

太原市北郊污水净化厂运行经验探讨

太原市北郊污水净化厂采用奥贝尔氧化沟工艺,总结了整个工艺的主要运行经验,确定了主要构筑物的运行情况,探讨了活性污泥的培养方法和污泥的处理方法,提出了在运行中应注意的事项。     

氧化沟膜生物反应器处理城市污水试验研究

通过小试,研究了氧化沟膜生物反应器对城市污水的处理效果与运行特性．结果表明,在水力停留时间(HRT)为4h,曝气/停曝时间为90min／30min等试验条件下,氧化沟膜生物反应器对城市污水中的DOC,CODc,,NH4-N,T—N和T—P等的平均去除率分别达到75％,90％,95％,80％和50％;氧化沟膜生物反应器具有较强的抗冲击负荷能力,当进水CODCr由265mg／L增加到1000mg／L时,出水CODCr仍能维持在100mg／L以下;在停运30d后,这种膜生物反应器去除有机物的性能在2d内可恢复,去除氨氮的性能在8d内可恢复;在3种膜清洗方法中,化学清洗效果最好,水力清洗效果次之,曝气清洗效果最差．     

酸化水解+氧化沟在污水厂提标改造中的应用

采用酸化水解+改良型卡式氧化沟工艺提标改造处理了某城市污水,主要介绍了该工艺的设计方案和工艺的运行结果.通过一年的跟踪运营,结果表明城市生活废水经酸化水解+改良型卡式氧化沟工艺处理后出水中的CODCr, BOD5, SS, NH_4~+-N, TN, TP六项指标均达到《城镇污水处理厂污染物排放标准》(GB18918-2002)的一级A的排放标准,并且该工艺处理效果稳定可靠,运行成本较低.     

低负荷氧化沟工艺丝状菌膨胀的成因与控制

氧化沟处理城市污水或生活污水工艺运行中存在丝状菌膨胀问题。通过分析活性污泥中菌胶团细菌和丝状细菌的生理特性及动力学特征,探讨了导致低负荷氧化沟工艺中丝状菌膨胀的主要限制因子。提出低负荷氧化沟控制丝状菌过度生长的改进工艺,介绍了氯氧化剂抑活丝状菌的方法     

几种城市污水处理工艺的特点及其应用

水资源短缺和水环境污染的程度日益加剧,使得城市污水的有效回收利用成为一项紧迫的任务。文章主要介绍了氧化沟、SBR法、厌氧生物处理及其天然净化系统几个污水处理工艺的特点,及其它们在当前城市污水处理中的应用。     

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