五峰垃圾填埋场渗滤液污染特征及处理系统

系统分析了五峰垃圾填埋场渗滤液中ＣＯＤ，ＢＯＤ＿５的季节变化特征，并对该填埋场的污水处理系统进行了研究和评价。     

五峰垃圾填埋场渗滤流污染特征及处理系统

系统分析了五峰垃圾填埋场渗滤液中ＣＯＤ，ＢＯＤ５的季节变化特征，并对该填埋场的污水处理系统进行了研究和评价。     

序批式活性污泥法处理城市垃圾填埋场渗滤液的试验研究

采用单池ＳＢＲ法对城市垃圾填埋场渗滤液处理进行了试验研究，对亚硝化型硝化的可能性作了探讨。采用ＳＢＲ法的最佳运行模式，对ＣＯＤＣｒ，ＢＯＤ５，ＮＨ３－Ｎ分别为４２０￣４２１６ｍｇ／Ｌ，４０￣９９０ｍｇ／Ｌ，１２０￣４０８ｍｇ／Ｌ的渗滤液进行处理，其去除率分别达到８７．３２￣９６．５６％，９５．２２￣９９．３３％，９０．６９￣９９．３４％，并提出了三池运行模式。     

生活垃圾渗滤液中镉的测定及分析

采用湿法消解对垃圾渗滤液样品进行预处理,通过火焰原子吸收分光光度法对生活垃圾填埋场渗滤液试样中的离子进行测定,对镉污染程度进行分析,以了解垃圾填埋场中垃圾渗滤液的镉质量浓度,为发展中城市的环境污染治理问题提供可参考的信息.采用此方法测定的垃圾渗滤液中镉质量浓度为0.011 88mg/L,远低于国家限定标准0.10mg/L.     

填埋层空气状况对渗滤液中氮成分变化的影响

渗滤液回灌厌氧填埋层可以有效降解渗滤液中的有机物 ,但却对氨氮去除无效 ;而且由于有机物降解的加速 ,使回灌后渗滤液中氨氮的质量浓度比常规垃圾填埋场更高 ,从而导致渗滤液必须再经过复杂的物化处理后才能达标排放 .为此 ,通过实验室模拟 ,研究了垃圾层中空气状况对回灌渗滤液出水中氮成分变化的影响 .结果表明 :只要向填埋层供给少量空气 ,就可有效降低渗滤液中氨氮的质量浓度 ,从而减轻渗滤液后续处理的压力     

交变电絮凝处理某垃圾填埋场渗滤液的试验研究

以镇江某垃圾填埋场垃圾渗滤液为研究对象,利用试验分析影响交变电絮凝处理垃圾渗滤液的主要因素:处理时间、电流密度、电极距离、初始pH值、氯离子初始浓度等;并通过正交实验法计算影响因素对COD去除效果影响大小的顺序为:电流密度>处理时间>pH值>氯离子初始浓度;且得到交变电絮凝处理高COD浓度的最佳处理方案。     

回灌条件下垃圾渗滤液水头动态变化规律

建立了回灌条件下垃圾渗滤液水头动态变化的模型，并用分离变量法对该模型进行了解析求解，对解进行了分析讨论，分析结果表明：水头的变化趋势大致为一抛物线，在抛物线顶点处达到最大，在一定的时间范围内，时间越长，其压力水头变化越明显。压力水头动态变化表明了通过填埋场回灌渗滤液水头的动态变化，可以短时间内使垃圾渗滤液中的有机污染物得到有效去除。其解可为垃圾填埋场渗滤液控制系统的设计和管理提供科学的理论依据和技术支持，对于城市垃圾填埋场渗滤液的处理具有一定的指导作用和工程实用价值。     

桐庐县垃圾填埋场渗滤液处理工程设计

城市生活垃圾渗滤液成分复杂,污染物质量浓度大,处理难度较大。结合工程实例,包括工艺选择,设计参数的确定。简要介绍了垃圾填埋场渗滤液的处理方法,特别采用物理与生化处理相结合的处理技术能有效去除氨氮和有机物。     

浅谈一种适合我国北方地区垃圾渗滤液处理工艺

城市垃圾填埋场渗滤液的处理一直是填埋场设计、运行和管理中非常棘手的问题。它成分复杂,浓度非常高,而且水质变化范围很大,在现阶段国内填埋场对渗滤液的处理大多数采用生化处理、土地处理、物化处理等工艺或几种工艺的组合。本文介绍一种适合我国北方地区的、物化法处理生活垃圾填埋场渗滤液的工艺―MVC（Mechanical Vapor Compression）蒸发浓缩工艺法。     

垃圾填埋汤渗滤水回灌技术的研究：Ⅰ.垃圾渗滤水填埋场回灌的…

对垃圾填埋场的覆盖土及其填埋层的微生物对渗滤水的回灌处理的影响进行探索，研究结果表明，为改善覆盖土层的透水性和透气性，在试验所用的亚粘土中必须加入一定比例的细砂，土砂比以７：１为佳。土砂比为７：１的土柱对进水ＣＯＤ负荷为６．６￣１１５ｇｍ＾－２·ｄ＾－１的渗滤水在运行两个月的时间内，ＣＯＤ去除率可达９８％左右，对渗滤水回灌填埋场前后的填埋堆层的微生物镜检结果表明，经回灌处理后的填埋场相当于一个生物     

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).     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.