好氧法处理抗生素废水对比试验研究

通过对比分析3种好氧活性污泥法的试验结果,表明用SBR运行工艺处理土霉素、庆大霉素发酵废水可实现高进水浓度、高容积负荷的工程处理效果:处理工艺在连续曝气、连续进出水(即普通曝气法)条件下,COD平均去除率为79.5%(进水COD浓度537.4～663.1mg.L-1,平均出水COD为128.6mg.L-1);在间断曝气、曝气期内连续进水连续出水(即间断曝气法)条件下,COD平均去除率为72.7%(进水COD浓度537.4～1544.0mg.L-1,平均出水COD浓度为315.5mg.L-1);在间歇曝气、定时进水出水(即SBR法)试验条件下,COD去除率可达78.7%～88.4%(进水COD浓度1600～12000mg.L-1,出水COD浓度357.3～2500mg.L-1).     

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％.     

SBR工艺处理焦化废水的可行性研究

针对焦化废水难处理这一难题,引入 SBR工艺（反应期缺氧／好氧相结合）来处理焦化废水,试验结果表明,利用 SBR工艺处理焦化废水是可行的.在试验中还考察了 SBR工艺的运行方式、曝气时间、污泥负荷等对 COD、氨氮的去除效果.结果表明,进水 COD为 650～ 1 900 mg/L,氨氮为 150～ 330 mg/L时 ,去除率分别达到 80％和 70％以上.经技术经济分析,每吨水处理费用约为 1.3元.     

SBR法处理模拟淀粉废水的工艺研究

采用序批式活性污泥法(SBR)处理模拟淀粉废水,研究曝气时间、进水COD质量浓度对处理效果的影响.实验结果表明,进水COD为1 500～2 200 mg/L,温度为25℃,连续曝气时间为2.5 h,污泥质量浓度为2 000～3 500 mg/L,对模拟淀粉废水中的COD、NH4+-N有较好的降解能力,去除率均达85%以...     

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。     

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.     

IMBR投加活性炭处理屠宰废水实验研究

采用IMBR处理屠宰废水,考察了该工艺对CODcr、BOD5、NH3-N和浊度的去除效果.结果表明:IMBR对CODcr、BOD5和NH3-N的去除效果较好,去除率分别为95.45%、95.9%和89.97%,出水CODcr约为49.7 mg·L-1,NH3-N基本在10 mg·L-1以下,分别达到了<污水综合排放标准>(GB 8978-1996)的二级和一级标准.     

阳极等离子体电解处理高盐废水中的苯酚

采用阳极等离子体电解处理高盐废水中的苯酚.研究了阳极等离子体产生的条件,以及废水中盐的浓度、苯酚的质量浓度和处理时间对废水中COD去除率的影响.实验结果表明,在苯酚质量浓度为0.2g·L-1,NaCl浓度为0.4mol·L-1的溶液中,施加90V槽电压,处理10min,苯酚的去除率达100%;处理20min,废水的COD值从0.464g·L-1降到0.010g·L-1,COD去除率可达97.8%.探讨了阳极等离子体电解处理高盐废水中苯酚的机理.     

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.     

MBR在石化工业废水深度处理中的应用

采用膜生物反应器(MBR)处理石化工业废水,研究了MBR对CODcr、BOD5、NH3-N、TP及石油类等去除效果.结果表明:MBR对石化工业废水具有良好的稳定处理效果,平均去除率CODcr分别为:86.4%,BOD597.6%,NH3-N 99%,TP 68%,石油类86.7%.MBR出水后CODcr,BOD5,NH3-N,TP,石油类质量浓度平均值分别为35.9,2.9,0.46,0.36,1.35 mg·L-1.研究表明:处理后水质满足国家一级排放标准,MBR可以有效地处理石化工业废水.     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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