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.     

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%.     

“二级SBR+物化”组合工艺处理调味食品生产废水

某调味食品企业生产废水采用"二级SBR+物化"组合工艺处理,运行结果表明,该组合工艺对CODcr、BOD5、NH3-N、色度的去处效率均稳定在90%,出水水质达到广东省地方标准《水污染物排放限值》(DB44/26-2001)(第二时段)一级标准。     

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.     

屠宰废水预处理后的SBR工艺处理工程

于2006年7～10月,在广西贵港南山食品有限公司设计屠宰废水预处理后的SBR工艺处理工程.处理工程用三道隔网和隔油沉渣池预先去除毛皮等固体杂物以及油脂等细小悬浮物,然后经调节池进入SBR工艺处理废水.预处理能够容易地去除废水中的油脂,COD、BOD5、SS的最高去除率达47.0%,48.3%,62.0%.工程处理废水的最佳曝气时间7h,COD、BOD5、NH3-N去除率分别是95.3%,97.5%,97.3%,出水水质达到国家一级排放标准.工程处理屠宰废水的工艺流程简单,操作运行稳定、投资少,对水量和水质的变化有较强的抗冲击能力,特别适宜废水排放量在500m3/d以下的小型屠宰厂推广应用.     

EMBR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49．7mg&#183;L^-1,NH3-N基本在10mg&#183;L^-1以下,分别达到了《污水综合排放标准》（GB8978-1996）的二级和一级标准。     

填埋方式对生活垃圾填埋处理产物及稳定性的影响

为研究填埋方式对生活垃圾填埋处理产物及稳定性的影响,采用模拟试验方法研究好氧生物反应器、厌氧生物反应器、准好氧填埋和传统厌氧填埋等工况下垃圾固相(挥发性固体质量百分比VS、生物可降解度BDM、纤维素质量百分比、纤维素与木质素质量比C/L)、渗滤液(化学需氧量CODcr质量浓度、生物需氧量BOD5质量浓度、BOD5与CODcr质量浓度比B/C、总氮质量浓度TN、氨氮质量浓度NH3-N)和填埋气(甲烷CH4、二氧化碳CO2)等参数随时间变化。结果表明:生物反应器填埋(好氧或厌氧)能提高垃圾降解速率、加速垃圾稳定化。好氧生物反应器填埋对垃圾固相VS、BDM、纤维素的降解率分别达到57.5%、71.4%和93%,稳定化时间较厌氧生物反应器填埋缩短60%以上;渗滤液回灌加速降解渗滤液中小分子有机物:好氧生物反应器(189d)和厌氧生物反应器(596d)中CODcr和BOD5的降解率分别达到96%和99%,而且好氧生物反应器中TN和NH3-N的去除率分别达到96%和99%;厌氧生物反应器填埋利于甲烷气体集中产生和提高甲烷产率,好氧生物反应器和准好氧填埋能大大削减温室气体排放。     

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%．     

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.     

微电解厌氧SBR组合工艺处理化学制药废水

化学制药废水难以生化处理.采用微电解厌氧水解酸化可以使BOD/COD由0.125提高到0.644,可生化性能得到显著提高;同时考察了SBR工艺对预处理后废水的降解.结果表明：Fe/C比为30为最佳.SBR生化处理中,污泥负荷控制在0.5 kgCOD/kgMLSS·d左右,曝气6 h时COD去除率达85%,达到排放标准.     

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