A/O-MBBR工艺处理制革废水的研究

介绍了A/O-MBBR工艺对制革废水的进一步处理,考察了废水的有机物处理效果及氨氮(NH3-N)的处理效果。实验结果表明,当填料填充比例为60%时,有机物的处理效果:随着水力停留时间(HRT)的延长,COD去除率增加,当HRT达12 h时COD去除率达到92%;在HRT为12h时,随着进水COD质量浓度增加,COD去除率增加,在400 mg.L-1时达到95%,之后随COD质量浓度的继续增大其去除率有所下降。氨氮的处理效果:随着HRT的逐渐增大,氨氮质量浓度不断降低,在HRT为12 h时,出水氨氮质量浓度小于1.5 mg.L-1;氨氮去除率随进水COD质量浓度变大呈上升趋势,COD质量浓度在400 mg.L-1时氨氮去除率达到98%。     

ABR-BAF组合工艺处理大蒜切片废水

研究了厌氧折流板反应器(anaerobic baffled reactor, ABR)与曝气生物滤池(biological aerated filter,BAF)的组合工艺处理大蒜切片废水的运行特点。结果表明：ABR的最佳水力停留时间（HRT）为24?h,有机负荷(COD)小于6?kg/m3·d为宜,COD的平均去除率可达87%;BAF的最佳HRT为16?h,最佳气水比为10∶1,进水有机负荷(COD)宜保持在1.1～1.4?kg/m3·d,COD的平均去除率为82.0%。ABR BAF组合工艺COD总去除率保持在98.4%～98.7%之间,出水的COD质量浓度为79～94?mg/L,出水水质满足GB8978 1996《污水综合排放标准》一级标准。     

大蒜切片废水处理的组合工艺实验研究

研究填料厌氧折流板反应器(ABR)—活性污泥—水生植物的组合工艺处理大蒜切片加工废水的运行特点.结果表明:填料ABR单元的最佳HRT为20 h,有机负荷小于COD 7.8 kg/(m3.d)为宜,在此工况下,COD的平均去除率可达92.5%;活性污泥法单元的最佳HRT为12 h,进水有机负荷宜保持在COD 0.8~1.2 kg/(m3.d)之间,在此工况下,COD的平均去除率为81.0%;水生植物单元的最佳HRT为3.5 d,在此最佳HRT下,COD的去除率为42.6%.该组合工艺COD总去除率保持在99.37%~99.42%之间,出水的COD浓度为38~41 mg/L,出水水质能稳定达到国家一级A排放标准.     

ABR—BAF组合工艺处理大蒜切片废水

研究了厌氧折流板反应器（almerobic baffled reactor,ABR）与曝气生物滤池（biological aerated filter,BAF）的组合工艺处理大蒜切片废水的运行特点。结果表明：ABR的最佳水力停留时间（HRT）为24h,有机负荷（COD）小于6ks／m^3·d为宜,COD的平均去除率可达87％;BAF的最佳HRT为16h,最佳气水比为10：1,进水有机负荷（COD）宜保持在1．1～1．4kg／m^3·d,COD的平均去除率为82．0％。ABR-BAF组合工艺COD总去除率保持在98．4％～98．7％之间,出水的COD质量浓度为79～94mg／L,出水水质满足GB8978—1996《污水综合排放标准》一级标准。     

ICEAS反应器处理城市污水的试验研究

对ICEAS工艺的处理效果进行了研究,结果表明,ICEAS既能去除污水中的有机物,还能达到脱氮除磷的效果,出水COD浓度为15 2～42 2mg·L-1,COD总去除率可达80%～88%;出水BOD5浓度为5 12～16 90mg·L-1,总去除率可达85%～93%;出水氨氮浓度为4 5～7 5mg·L-1,总去除率为60%～70%,磷的去除率为60%～75%.     

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.     

人工湿地深度处理造纸污水尾水的工程应用

采用人工湿地工艺处理造纸污水二级生化处理厂出水(尾水),工程结果表明:COD平均进水质量浓度为150 mg/L,SS平均进水质量浓度为50 mg/L,经过处理后,出水COD、SS分别为90、20 mg/L,满足《制浆造纸工业水污染物排放标准》(GB3544-2008).人工湿地深度处理造纸污水尾水,运行费用低,充分利用当地闲置的土地资源,具有一定的可行性.     

农村小城镇生活污水的ASBR和微氧SBR处理研究

考察了厌氧序批式反应器(ASBR)和微氧SBR处理农村小城镇生活污水的可行性。结果表明,ASBR具有对农村小城镇污水预处理,减轻后续工艺负担,或者单独处理氨氮含量较低的污水的可行性;微氧SBR具有单独处理农村小城镇污水的可行性。ASBR运行温度10~15℃,间歇搅拌频率1 min/30 min,进水COD在100~400 mg/L,SS在10~180 mg/L,HRT分别为24,36,48,96 h,对应的CODt平均去除率为59.8%,62.7%,64.5%,68.8%;对应的SS平均去除率为62.1%,71.3%,81.6%,82.2%。微氧SBR反应器35℃运行,间歇曝气频率1 min/60 min,进水COD在100~400 mg/L,SS在10~180 mg/L,氨氮在20~30 mg/L,HRT分别为24 h,36h,48 h,96 h时,对应的SS平均去除率为73.2%,78.9%,85.3%,88.2%;对应的氨氮平均去除率为65.1%,70.0%,77.1%,83.5%。     

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).     

两种制革废水生化处理组合工艺的效能比较

 借助于实际工程的运行,比较了水解酸化与序批式活性污泥法(SBR)组合工艺(H-SBR)和接触氧化与SBR组合工艺(O-SBR)两套设施处理制革废水的效能。结果表明,接触氧化与SBR组合工艺能有效处理制革废水,在接触氧化HRT 24h、SBR曝气5-7h的条件下,COD和氨氮平均去除率可分别达到83%和74%,出水平均浓度分别为273和42mg/L。采用水解酸化与SBR的组合工艺对预处理后的制革废水进行处理,在水解酸化HRT 24h、SBR曝气5-7h的条件下,COD和氨氮平均去除率分别仅为70%和5%,虽然COD可降低到500mg/L以下,但氨氮高达163mg/L左右,且需配套臭气处理设施。     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has