单一复合反应器处理难降解焦化废水试验研究

在悬浮相污泥中投入纤维球填料形成单一复合生物反应器,用复合生物反应器处理预处理后的焦化废水,研究水力停留时间、pH值、负荷等参数对其处理效果的影响,从而确定最佳运行参数,并在此基础上研究在最佳运行条件下复合生物反应器对焦化废水中COD和NH4 —N的去除效果.结果表明,单一复合生物反应器能有效降解焦化废水中的COD及NH4 —N等难降解物质.当进水COD和NH4 —N分别小于670 mg/L和260 mg/L时,COD和NH4 —N的去除率可分别达到94.8%和91.4%.     

UASB+生物接触氧化处理中药废水的启动驯化研究

采用UASB+生物接触氧化处理中药废水,研究启动驯化过程中反应器的有机物降解特性。结果表明,启动驯化阶段好氧生物接触氧化池具有较强的抗冲击负荷能力,驯化完成后厌氧UASB具有较高容积负荷、生物接触氧化池对有机物去除率较高。并且,当UASB-生物接触氧化组合工艺HRT为24 h、进水COD稳定在1 500~3 500 mg/L时,出水COD在80 mg/L以下,COD去除率达96.24%,中药废水COD能稳定达标排放。     

包装印刷废水处理工程

本文采用混凝沉淀-水解酸化-生物接触氧化组合工艺处理包装印刷废水,取得了很好的处理效果,其对废水中COD、SS、色度等污染指标的去除率均在95%以上。     

生物接触氧化法处理富马酸废水

采用好氧生物膜接触氧化法处理富马酸废水，用盾式纤维填料作为生物的支持物，研究生物降解富马酸的原理和不同工艺条件对富马酸废水降解的影响．实验结果表明，富马酸的降解符合一级反应规律，最佳的反应气水比为16，控制水力停留时间为8h．当富马酸废水COD和BOD，分别增至l800mg／L和520mg／L时，处理后的废水的COD约为216mg／L，BOD，约为114mg／L，BOD，与COD的比值为0.53．在反应器容积负荷提高到原来的7．6倍，运行40h后，COD去除率约可恢复到70％，表明生物膜接触氧化反应器具有较大的缓冲能力，其抗冲击负荷能力较强。     

高浓度山梨酸废水生化处理

针对高浓度山梨酸废水具有有机物浓度高、难降解的特点,从优化厌氧生化处理入手,设计了厌氧-生物接触氧化法的工艺路线进行实验研究.结果表明,经5d厌氧处理后,BOD/COD值由0.17提高到0.28,再配合12h生物接触氧化处理,使COD从7.00×103mg/L左右降至1.58×103mg/L,COD平均总去除率达77.4%.并对生物接触氧化段填料进行了优选与研究.     

软性填料生物接触氧化法处理啤酒废水试验研究

试验以软性填料为载体,采用生物接触氧化法处理中高浓度啤酒废水,通过检测COD指标,研究其处理效果。实验表明,由于软性填料具有较大的理论比表面积、空隙率较高等特点,所以附着生物较多,反应器挂膜较快,处理能力较高,抗冲击负荷能力较强。生物接触氧化法处理中高浓度的啤酒废水取得了较好的效果。系统正常运行五天后,COD去除率就比较稳定,约为80％左右。处理后期,COD去除率在90％左右。     

利用01-N1~#菌强化处理焦化废水初步研究

以每升 5 g接种量接种 0 1 - N1 # 菌处理焦化废水可取得较好的效果 ,处理 96h,其中 COD初始含量在 1 2 0 0 mg/L以下 ,去除率为 90 %以上 .NH3 - N初始含量在 5 90 mg/L以下 ,去除率达到 98% .挥发酚初始含量在 1 70 mg/L以下 ,去除率达到 99% .0 1 - N1 # 菌接种量一般应在每升 5～1 0 g.焦化废水中 COD、NH3 - N和挥发酚初始含量较低时处理效果好 ,含量高时处理效果较差 .COD、NH3 - N和挥发酚含量低时处理时间一般为 2～ 3天 ,其处理效果基本能达到以上指标     

利用淡水微藻对畜禽养殖废水的实验研究

以不同浓度的畜禽养殖废水为对象,研究藻菌体系对废水中的NH4+-N、TP和COD的去除效果。结果表明:藻菌体系对不同浓度的畜禽养殖废水的处理效果不同,当废水中NH4+-N、TP和COD浓度分别小于44.4 mg/L、6.4 mg/L和500 mg/L时,藻菌微生物的生长速度快、生物量大,对废水处理效果好;当处理时间为6 d时,NH4+-N、TP和COD的去除率分别大于90%、84%和80%,该实验结果为构建高效藻类塘提供理论依据。     

一体化厌氧氨氧化-反硝化固定微生物反应器协同脱氮研究

采用厌氧氨氧化（ANAMMOX）工艺的厌氧上流式固定化微生物反应器处理含有机物的高浓度舍氮废水,考察ANAMMOX与反硝化协同脱氮效果。试验结果显示：在一定范围内,NH2-N和NO2-N进水负荷不会对ANAMMOX与反硝化协同脱氮造成明显影响,当进水负荷为301-800mg/L时,系统对NH4^＋-N、NO2-N和TN的去除率分别达到93.3％、98．6％和90.3％的较高水平;当3COD浓度为800-850m学屯时,COD对ANAMMOX与反硝化协同脱氮基本不影响,并可实现95．7％的COD去除率。同时,NO3-N浓度、N2产量、pH值和生物相存在的特征性变化,也表明ANAMMOX与反硝化协同作用良好。     

复合异养脱氮菌群脱氮性能研究

采用传统微生物分离纯化方法,从焦化废水活性污泥中筛选得到4株高效去除氨氮(NH4+-N)和总氮(TN)的异养硝化细菌C16、C17、YX1、YX2。经96h培养,4株菌的氨氧化率均在90%左右,TN去除率也达到了68%以上。组合试验研究表明,4株菌组成的复合菌在降解NH4+-N和去除TN时均比单一菌株和其他组合菌的效果好。经24h培养,四株菌组成的复合菌群的氨氧化率可达95%,TN去除率也达到了91%。     

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.     

A computer generator for randomly layered structures

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

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.