生物接触氧化法处理羽绒洗涤废水

介绍了生物接触法处理工艺在处理羽绒洗涤废水中的应用,通过福建长乐某羽绒厂的运行情况为例,经过调试,确定了用生物接触法处理羽绒洗涤废水,最佳曝气时间为5.5h,最佳沉淀时间为1.5h.经过实践,该工艺合理,处理后的出水水质达到<污水综合排放标准>(GB8978-1996)中的一级排放标准,取得了显著的环境效益.     

无机膜——厌氧水解——SBR好氧工艺在油脂洗涤废水中的应用

介绍一种新的处理油脂洗涤废水的工艺流程－－无机膜－－厌氧水解－－SBR好氧工艺。通过无机膜在油脂洗涤废水处理中的应用，有效降低了废水的进水浓度，同时结合运用改进的生化处理方法－－SBR法，确保废水排放稳定达标，解决了油脂废水处理中的难题。     

无机膜——厌氧水解——SBR好氧工艺在油脂洗涤废水中的应用

介绍一种新的处理油脂洗涤废水的工艺流程———无机膜———厌氧水解———SBR好氧工艺。通过无机膜在油脂洗涤废水处理中的应用 ,有效降低了废水的进水浓度 ,同时结合运用改进的生化处理方法———SBR法 ,确保废水排放稳定达标 ,解决了油脂废水处理中的难题     

SBR工艺处理腈纶混合废水试验研究

本文研究了SBR法处理腈纶混合废水工艺条件,考察了腈纶混合废水先经超声波处理,再经SBR处理的效果。试验结果表明:COD去除率为73.3%,BOD去除率为46.4%。采用超声波对腈纶混合废水作预处理,可有效降低腈纶混合废水的COD,NH+4-N,增加腈纶混合废水的可生化性。再经间歇式活性污泥法(SBR)处理后,各项水质指标均符合GB8978-88《污水综合排放标准》中的一级标准。     

SBR法间歇式活性污泥系统处理有机废水的实验研究

采用实验室规模的序批式活性污泥曝气反应器(SBR)工艺处理有机废水.通过实验分析了不同曝气量、曝气时间、进水浓度、沉淀时间、闲置时间与SBR法处理效果之间的关系,确定了SBR法处理中低浓度的有机废水的最佳运行参数.实验结果表明,在SBR的曝气时间为4h、沉淀时间为1h、闲置1h的条件下,该工艺对COD、NH3 -N等均有很好的去除效果,经处理的有机废水COD、氨氮最高去除率分为89.74％、82.13％.     

超声氧化-SBR法处理拟除虫菊酯类农药化工废水

采用超声氧化-间歇式活性污泥(sequencing batch reactor activated sludge process,SBR)法处理拟除虫菊酯类农药化工废水,分析了超声氧化工序中不同因素对废水化学需氧量(chemical oxygen demand,COD)去除率的影响以及SBR工序的最佳处理时间.结果表明:当进水COD值为613.5 mg·L-1、超声反应时间为40 min、H2O2(30%)加入量为6 mL·L-1时,超声氧化工序的废水COD去除率最高,达到45.7%;经超声氧化最佳工艺条件预处理的废水进入SBR反应器反应4 h,出水COD值为52.64 mg·L-1,达到GB 8978—1996《污水综合排放标准》中一级标准的要求.     

水解酸化-SBR处理乳品废水中试试验研究

采用水解酸化-SBR工艺处理乳品废水的试验研究.分析研究了水解酸化池内pH值与VFA,BOD与CODcr比值与CODcr去除率及氨氮随时间变化的相互关系;SBR池内CODcr与氨氮去除率和SBR池内溶解氧随时间变化的相互关系,以及水解酸化和SBR池内降解速率常数变化情况.试验结果表明,当进水CODcr质量浓度为1 250-1 830 mg/L,水解酸化池的最佳水力停留时间为6 h,SBR在排出比为1∶2,最佳的反应时间为4 h,出水可以达到国家污水综合排放标准(GB 8978—1996)二级排放标准.SBR池内溶解氧的递变规律,得出SBR池供氧方式宜采用渐减曝气的方式.     

造纸废水处理工程设计

采用沉淀＋水解酸化＋SBR污水处理工艺处理某造纸厂的废水,并介绍了各处理构筑物,及其运行参数及经济技术指标。运行结果表明：用该工艺处理造纸废水,其出水水质达到《造纸工业水污染物排放标准（》GB3544-2001）中的要求。     

某造纸厂废水处理工艺设计及运行效果分析

采用水解酸化+SBR工艺处理某造纸废水.运行结果表明,该工艺级有效去除废水中的主要污染物,处理出水水质稳定,并达到要求排放标准.     

SBR活性污泥法处理味精废水的工艺研究

本文对SBR(序列间歇式反应器)活性污泥法处理味精废水的工艺作了初步探讨。提出了必要的设计参数和运行要点。在SBR活性污泥法中控制充水时间和曝气方式是防止反应受抑制,最大限度地提高反应速度,缩短反应周期的重要手段。试验提出SBR活性污泥法处理味精废水的最佳工艺参数;充水时间:2h,同时进行搅拌保持缺氧状态;曝气方式;限制曝气;污泥负荷:0.2～0.4kgCODcr/kgMLSS·d(混合液悬浮固体浓度);溶解氧:搅拌时0.3mg/l,曝气时2.3mg/l;水温:(23±2)℃。在此运行条件下,当进水CODcr为2750mg/l、NH_3-N为275mg/1时,出水CODcr及NH_3-N均能达到轻工部颁发的味精工业废水污染物排放标准。     

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