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(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。     

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.     

复合式折流板厌氧反应器处理城市污水

采用弹性立体填料的复合式折流板厌氧反应器处理城市污水 .研究结果表明 ,该装置处理城市污水效果显著 .当进水COD在 87- 32 0mg L范围内 (平均 2 2 7mg L)变化 ,水力停留时间大于 5 .2h ,反应系统的容积负荷小于 0 .86kgCOD (m3·d)时 ,常温下COD去除率大于 6 0 % ,出水COD平均为 81mg L ,SS去除率大于77.8% ,出水SS小于 30mg L ;反应系统在试验条件下温度与溶解性COD去除率成正相关 .试验还得出了系统处理城市污水溶解性BOD去除率随HRT变化的降解动力学模式 .     

UBF厌氧反应器处理高pH值退浆废水的启动试验研究

重点研究采用UBF厌氧反应器难降解退浆废水的启动,试验结果表明,在中温(35±3 ℃)、进水COD为2000 mg/L左右、HTR为24 h、OLR为2.0 kgCOD/m3·d、pH7.6左右情况下2个月迅速启动,COD去除率稳定,并培养出适应水质要求厌氧颗粒污泥;经过YDT弹性填料和组合填料的挂膜比较发现:组合填料经YDT弹性填料挂膜快、三相分离效果好、COD处理效果组合填料经YDT填料高2%～8%.     

UBF-混凝沉淀法处理啤酒废水

以青岛啤酒 (福州 )厂的啤酒废水为原水进行试验研究 .结果表明 ,当试验温度为 2 0 - 2 5℃ ,停留时间为 13h ,平均容积负荷为 3 .5kg(CODcr) m3·d时 ,UBF反应器对COD去除率平均为 75 % ,其中反应器上部弹性立体填料滤层对COD的去除率为 2 0 %左右 ,再加上混凝沉淀后处理可使整个工艺对COD的去除率达到90 %以上 .     

UBF厌氧反应器处理高pH值退浆废水的启动试验研究

重点研究采用UBF厌氧反应器难降解退浆废水的启动,试验结果表明,在中温(35±3℃)、进水COD为2000 mg/L左右、HTR为24 h、OLR为2.0 kgCOD/m3.d、pH7.6左右情况下2个月迅速启动,COD去除率稳定,并培养出适应水质要求厌氧颗粒污泥;经过YDT弹性填料和组合填料的挂膜比较发现:组合填料经YDT弹性填料挂膜快、三相分离效果好、COD处理效果组合填料经YDT填料高2%~8%。     

曝气生物滤池及其填料性能

为提高曝气生物滤池(BAF)处理废水的效率,以沸石、活性炭、建筑陶粒、工程陶粒作为填料测试气体流速、水力停留时间(HRT)、进水有机负荷对生物滤池的化学需氧量(COD)、NH3—N的去除效果及出水浊度的影响。结果表明:在水力停留时间为1.5h、进水COD为150mg/L、有机负荷为2.41kgCOD/(m3·d)时,两种陶粒出水COD均小于25mg/L;当进水有机负荷为0.74kgCOD/(m3·d)时,工程陶粒出水COD小于10mg/L;工程陶粒是曝气生物滤池填料的最佳选择。     

影响MBR处理高盐废水效果的因素研究

本文采用MBR工艺对高盐度废水处理的影响因素进行研究。试验条件如下:污水中海水比例为50%,COD为700～800mg/L,氨氮为80～100mg/L。分别研究了DO、HRT、MLSS对COD和氨氮去除率的影响。试验结果表明:在高盐度条件下,控制DO为1～2mg/L、HRT为12h、MLSS为7～8g/L时,COD和氨氮的平均去除率可分别达到91.91%和91.44%。     

一体化两相厌氧反应器处理猪场废水的启动研究

采用自行设计的一体化两相厌氧反应器处理猪场废水,对启动过程进行研究.在37 ℃下,通过交替增加进水化学需氧量(COD)浓度和缩短水力停留时间(HRT)来提高系统的COD容积负荷(VLR),采用动力学控制与pH值调节相结合的方法对产酸相和产甲烷相进行分相.经过68天的运行,系统的VLR达到8.84 kg/(m3·d),HRT为20.95 h,产酸相的COD去除率基本维持在20.00%～30.00%,系统的COD去除率稳定在80.00%以上.其中产酸相的VLR和HRT分别为31.11 kg/(m3·d) 和5.95 h,产甲烷相的VLR和HRT分别为9.39 kg/(m3·d)和15.00 h.出水悬浮固体(SS)含量均在400 mg/L以下,去除率最高可达92.80%,沼气的容积产气率达到2.57 m3/(m3·d).     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.