强化混凝控制有机物和残余铝的试验研究

采用强化混凝技术,研究了水力条件、混凝剂投加量和pH值等因素对混凝效果的影响。结果表明,强化混凝技术能有效地去除NOM,而且控制残余铝量不超标。TOC随Al2(SO4)3投加量的增加而显著降低,投加量大于0.2 mmol/L后,去除率基本保持稳定。在pH值为8.0时残余铝含量最低。调节pH在8.0,投加量为0.3 mmol/L,可控制水中有机物的TOC在1.4 mg/L左右,残余铝量在0.05 mg/L以下。     

复合型生物絮凝剂去除低浊水源水中铝的研究

针对传统无机铝盐絮凝剂在处理低温低浊水时残余铝过高的问题,采用中试装置,应用复合型生物絮凝荆(CBF)处理北方地区冬季低温低浊水源水,考察了在不同混凝条件下处理后水中残余铝浓度的变化.结果表明:复合型生物絮凝剂对水中残余铝有很好的效果,在与聚合氯化铝铁复配进行强化混凝的试验当中,混凝效果提高36.1%,总投药量降低了15%,并且消除了聚合氯化铝铁(PAFC)导致的残余铝升高的现象,出水残余铝浓度仅为0.016 mg/L.综合考虑处理效果与投药量,建议复合型微生物絮凝剂与聚合氯化铝铁的最佳复配比为2 mg/L:15 mg/L.     

荧光分光光度法测定水中铝

铝是一种常见的元素,近年来的研究表明,由于过量摄入铝而引起人体铝中毒的临床表现愈加明显,饮水是摄入铝的主要途径之一,因此监测水中的铝含量是医学上防病治病的重要基础工作。生活饮用水卫生标准规定其限定值为0.2mg/L,本文在十六烷基三甲基溴化铵（CTMAB）的存在下,7—碘—8羟基喹啉—5—磺酸（H2QSI）测定几种饮用水中的铝含量。结果表明,该方法灵敏、简便,其检测限为0.01mg/L,有良好的重现性。1 材料与方法1． 1仪器与主要试剂1．1．1仪器,荧光分光光度计（日立F-4OOO型）1．1． 2试剂。铝标准溶液：称取1.OOO g 光…     

MicroFA四相催化氧化技术在二级生化处理出水深度处理的应用

抗生素工业废水难处理,特别是以抗生素工业废水为主的混合工业废水经二级生化处理后的尾水.有鉴于此,本文用MicroFA四相催化氧化技术对二级生化出水进行深度处理,发现效果好,其FeSO4和H2O2控制投加量分别为6.5mg/L、5.5mg/L,对重铬酸盐指数(CODcr)、TP的平均去除效率分别为50.48%、94.71%,出水CODcr、TP能达到《污水综合排放标准》(GB8978-1996)的一级排放标准,甚至可达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准.该工艺一次性投资较高,但运营管理较简单,处理效果稳定可靠,运行成本0.92元/吨、相对合理.该工艺为难生物降解的抗生素类制药为主的混合工业废水二级出水的深度处理提供了新途径.     

滨海高新区某10000m~3/d污水处理厂工程设计及运行

为加快滨海高新区建设,改善区域水生态环境,建设滨海高新区某10000,m3/d污水处理厂。项目通过详细的调研、论证、对比,确定采用预处理A2O生化处理-深度处理-生态处理工艺,建成后利用接种方式培养活性污泥。自运行以来,工艺处理后,出水COD 31.3~40.2,mg/L、BOD 8.1~8.4,mg/L、SS 8.2~8.6,mg/L、NH3-N 3.8~4.2,mg/L、TN 9.6~10.8,mg/L、TP 0.39~0.4,mg/L,运行效果良好,稳定性高,出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A排放标准。     

不同混凝剂处理印染废水试验研究

选取了市售的聚合氯化铝铁（PAFC）、聚合硫酸铁（PFS）、聚合氯化铝（PAC）和自制聚合硫酸铁铝（PAFS）4种常用混凝剂对重庆某印染废水进行试验,探讨了混凝剂种类、废水pH值对印染废水脱色、COD去除效果的影响;考察了自制PAFS投加量、助凝剂投加量对印染废水的脱色、COD去除效果的影响;结果表明：4种混凝剂的混凝效果排序为：PAFS＞PAFC＞PFS＞PAC;在不调节原水pH的条件下,PAFS投机量为0.3 g/L时,印染废水的COD和色度分别达到最高为82.8％和86.6％;在此基础上再加入助凝剂的用量为4 mg/L时,印染废水的COD和色度最高分别达到95.8％和96.6％.     

处理印染废水聚合物的合成与应用研究

该文首先采用通用型絮凝剂聚合铝、聚合铁对印染废水进行处理，比较出聚合铝优于聚合铁．在此基础上，针对印染废水的水质特点，对聚合铝的合成条件进行系统的研究，结果表明：新合成条件制得的特定聚合铝处理印染废水，具有絮凝能力强、沉降速度快、处理效果明显等优点．     

污水深度处理投加聚合氯化铝对微生物活性的影响

分析江苏某城市污水处理厂聚合氯化铝(PAC)的投加对污水中铝离子以及微生物活性的影响。结果表明:低浓度的铝离子会增强微生物的活性,但浓度过高会对微生物产生抑制作用,当铝离子质量浓度为7.5mg/L时,对微生物的活性没有影响;当铝离子的质量浓度达到10mg/L时,对微生物活性会产生抑制作用;以微絮凝-砂滤工艺作为城市污水处理厂的深度处理工艺时,投加的聚合氯化铝质量浓度不宜超过12.5mg/L,当质量浓度达到15mg/L时,铝离子会对好氧池的微生物活性产生明显的抑制作用。     

阳离子聚合物与聚合铝处理油田采油污水研究

中原油田是一个多层系、多油藏类型的复杂断块油田，部分区块储层中黏土特别是膨胀性黏土含量高，对注入水水质的要求较高．本文对阳离子聚合物与聚合铝复配处理中原油田采油污水进行了研究，结果表明：当聚合铝浓度为50mg／L时，阳离子聚合物的分子量、加入浓度、污水的pH值、污水温度等对处理效果影响大，当阳离子聚合物的黏均分子量为120万、加入浓度3～5mg／L、污水的pH值为6．5～8．5、污水温度在45℃时，中原油田采油一厂采油污水中悬浮物、油的含量分别由处理前的165mg／L，118mg／L降低到1．2mg／L及5．0mg／L，滤膜系数达到35。     

朝阳市污水处理厂调试及运行——悬挂链式曝气活性污泥法工程应用研究

1.工程概述 朝阳市污水处理厂是服务于朝阳市城区工业、生活污水排放的唯一的污水处理设施。工程于2006年11月破土动工,至2008年6月建成并投入设备调试及试运行.其平面规划按规范进行,绿化率为47%,环形道路,污水与污泥处理兼顾,常规分析化验仪器完备,是一个完整的污水处理系统。工程设计进水水质为：COD 480mg／L,BOD 5210mg／L,SS 250mg／L,NH3-N 30mg／L。磷酸盐（以P计）4．0mg／L．设计出水水质执行《城镇污水处理厂污染物排放标准》（GB18918-2002）一级标准的B标准：COD60mg／L,BOD520mg／L,SS20mg／L,NH3-N15mg／L,磷酸盐（以P计）1．5mg/L．     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…