两级SBR工艺处理小城镇生活污水研究

采用两级 SBR (sequence batch reactor)工艺处理小城镇生活污水 ,试验结果表明 ,先通过 SBR1反应器对污水起到了平衡、均化作用 ,再通过 SBR2反应器实现了污水的脱氮除磷 .试验出水 ρCOD(铬法 )浓度为 2 1～ 43 mg· L-1,去除率达到 85 %～ 93 % ;出水ρ(N) (N为氨态氮 )为 3 .3～ 9.5 mg· L-1,去除率达到 65 %～ 81 % ;出水ρt(P)为 0 .3 2～ 0 .63 mg· L-1,去除率达到 87%～ 95 % .     

厌氧消化-化学混凝-SNAD联合工艺处理海产品加工废水

设计厌氧消化-化学混凝-SNAD联合工艺对海产品加工中的高浓泡药间废水进行处理．厌氧消化对废水中COD去除率最高可达94.37%,平均可达89.77%,有机氮与聚合磷转化为NH+4-N、PO3-4-P,浓度分别达总氮、总磷浓度的85%~90%;20 g·L-1的聚合氯化铝可实现总磷浓度1 000 mg·L-1废水的总磷去除率99.83%,出水磷浓度为1.70 mg·L-1．SNAD系统中控制温度为32~35 ℃,以空气流量10~15 mL·min-1间歇曝气(ton/toff=10 min/5 min)控制DO为0.1 mg·L-1左右,pH为7.5~8.0,HRT为24 h,运行稳定时最高可处理总氮浓度为655 mg·L-1的废水,总氮、COD去除率分别为72.71%、56.70%．高通量测序结果表明反应器内形成了SNAD系统,AOB、AnAOB和DNB含量分别为2.72%、2.09%、1.46%．     

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).     

不同化学方法对印染、造纸废水的深度处理研究

采用Fenton试剂氧化法、NaClO氧化法、KAl(SO4)2混凝沉淀法分别对新乡市某印染厂和某造纸厂的二级生化出水进行深度处理.考察了废水初始pH,3种试剂投加量对废水COD和色度的影响.研究结果表明:室温下,反应时间30min,3种方法对印染废水、造纸废水的深度处理均具有明显效果.Fenton试剂氧化法对两种废水的处理效果明显优于另外两种方法,其对印染废水深度处理的最适条件为:pH 4,H2O20.8mg·L-1、FeSO4150mg·L-1,COD、色度去除率分别达到81.5%、75.0%,COD和色度分别从243mg·L-1、128降至45mg·L-1、32;其对造纸废水深度处理的最适条件为pH 4,H2O20.6mL·L-1、FeSO4200mg·L-1,COD、色度去除率分别达到73.8%、75.0%,COD和色度分别从351mg·L-1、128降至92mg·L-1、32.两种废水经过Fenton试剂氧化法处理后完全可以达到地方工业行业废水排放标准.     

ABR-人工湿地组合工艺处理生活污水

研究厌氧折流板反应器(ABR)与人工湿地(constructed wetland)的组合工艺处理低浓度生活污水的运行特点及效果.结果表明:ABR的最佳停留时间(HRT)为12 h,COD的平均去除率为76%;人工湿地的最佳HRT为4 d.ABR-人工湿地组合工艺COD总去除率平均为89%,出水COD浓度为42~51 mg.L-1;对BOD5的总去除率达到95%,出水浓度低于11.2 mg.L-1;对SS的总去除率达到95%以上,出水SS浓度平均为9.1 mg.L-1;对氨氮有明显的去除效果,总去除率平均为66.8%,出水氨氮浓度低于15 mg.L-1.各项出水水质除氨氮外均满足GB18918-2002《城镇污水处理厂污染物排放标准》一级B标准.ABR-人工湿地组合工艺可作为农村生活污水的处理工艺推广使用.     

厌氧消化与两级串联SNAD-IFAS组合工艺处理垃圾渗滤液研究

利用厌氧反应器(UASB)与固定生物膜-活性污泥(IFAS)反应器探究厌氧消化、同时亚硝化-厌氧氨氧化-反硝化(SNAD)工艺对垃圾渗滤液的处理效果.控制UASB的温度为32℃,pH 为8.0~8.3,在水力停留时间(HRT)为24h时COD去除率为44.9%,出水碳氮比在1.3∶1左右,完全可以满足后续SNAD工艺需求.两级串联SNAD-IFAS反应器共运行96d,UASB 出水稀释后作为SNAD 工艺的进水.独立调控两池的温度、DO 浓度、pH,SNAD1池分别为32 ℃、0.1~0.2mg·L-1、7.8~8.0,SNAD2池分别为32 ℃、0.08~0.14mg·L-1、7.5~7.8.在进水TN和COD浓度分别为602.3mg·L-1和878.1mg·L-1时,SNAD工艺对TN和COD的去除率分别达到83.3%和39.4%.高通量测序结果表明反应器内具有典型的SNAD工艺微生物群落结构,亚硝化菌(AOB)主要存在于活性污泥中,厌氧氨氧化细菌(AnAOB)和反硝化菌(DNB)主要富集在生物膜上.SNAD1池与SNAD2池的生物膜均以AnAOB作为优势菌种,其丰度分别达到26.21%和30.82%.     

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%。     

间歇式活性污泥处理工艺及应用

阐述了间歇式活性污泥处理(SBR)工艺的基本原理、工艺特点。应用间歇式循环延时曝气活性污泥法(ICEAS)对某污水处理厂城市污水进行处理,处理结果为COD质量浓度去除率为89.1%,BOD5质量浓度去除率为96.5%,总氮质量浓度去除率为60.2%,总磷质量浓度去除率为84.3%,达到出水水质要求。     

一种新型二氧化氯消毒剂的杀菌性能研究

研究了新型固体粉末状二氧化氯消毒剂的杀菌效果 .结果为 :将本产品稀释至有效浓度 0 .17mg·L- 1 作用 5min ,对大肠杆菌和橙黄八叠球菌的杀灭率为 10 0 % .40 0mg·L- 1 消毒剂溶液作用 15min ,对枯草杆菌黑色变种芽胞杀灭率达 10 0 % .消毒剂浓度为 60 0 0mg·L- 1 可 10 0 %破坏乙肝表面抗原 .     

光助类Fenton降解结晶紫染料废水

研究阳离子染料结晶紫在UV/Fe3+/H2O2体系下的均相降解,考察pH值、H2O2和Fe3+用量等条件对脱色率及COD去除率的影响.结果表明,紫外光能促进染料的脱色与矿化.当pH=2.70,H2O2=340mg·L-1,Fe3+=28mg·L-1时,结晶紫废水在80min下的脱色率大于99%,COD去除率达到60.1%.H2O2分次投加时,COD去除率可提高到70.6%,反应表观活化能测定为79.0kJ·mol-1.反应20min后,水样的紫外-可见光谱表明,染料分子共轭结构被破化,但仍以小分子化合物存在.水样中的BOD5/COD由0.034提高到0.320,可生化性大大改善.     

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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