ABR-人工湿地组合工艺处理生活污水

研究厌氧折流板反应器(ABR)与人工湿地(constructed wetland)的组合工艺处理低浓度生活污水的运行特点及效果.结果表明:ABR的最佳停留时间(HRT)为12 h,COD的平均去除率为76%;人工湿地的最佳HRT为4 d.ABR-人工湿地组合工艺COD总去除率平均为89%,出水COD浓度为42~51 mg.L-1;对BOD5的总去除率达到95%,出水浓度低于11.2 mg.L-1;对SS的总去除率达到95%以上,出水SS浓度平均为9.1 mg.L-1;对氨氮有明显的去除效果,总去除率平均为66.8%,出水氨氮浓度低于15 mg.L-1.各项出水水质除氨氮外均满足GB18918-2002《城镇污水处理厂污染物排放标准》一级B标准.ABR-人工湿地组合工艺可作为农村生活污水的处理工艺推广使用.     

一体式膜生物反应器处理中药废水的试验研究

针对中药废水具有COD高,水质变化大等特点,采用一体式膜生物反应器(MBR)对中药废水的厌氧反应器出水进行处理,在固定水力停留时间(HRT)为5 h的条件下,考察了进水COD质量浓度及污泥质量浓度(MLSS)与COD去除之间的关系.结果表明,当HRT为5 h,进水COD质量浓度小于3 000 mg/L时,膜出水COD小于30 mg/L,满足中水回用标准;当进水COD质量浓度为3 000～6 000 mg/L时,膜出水COD大于30 mg/L而小于100 mg/L,满足污水排放标准;当进水COD质量浓度大于6 000 mg/L,膜出水COD大于100 mg/L,不能满足污水排放标准.同时污泥质量浓度(MLSS)与COD去除的关系表明,为了达到更好的COD去除率,MBR的最佳MLSS应控制在7 543 mg/L.     

混凝/水解酸化/SBR工艺处理造纸废水

采用混凝/水解酸化/SBR工艺处理造纸废水,在进水COD1300mg/L,BOD5400mg/L,SS900mg/L,出水COD70mg/L,BOD518mg/L,SS27mg/L。出水水质稳定,达到了设计的排放要求。     

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.     

一体化A/O工艺处理生活污水设计及运行效果分析

采用一体化A/O工艺处理生活污水,在进水COD:355mg/L,BOD5:223mg/L,NH3-N:38mg/L,SS:220mg/L时,出水COD:52mg/L,BOD5:18mg/L,NH3-N:10.4mg/L,SS:25mg/L,出水水质稳定,且达到国家《污水综合排放标准》(GB8978-1996)中的一级标准。     

SBR法处理模拟乳制品废水处理效果的研究

采用SBR法考察模拟乳制品废水COD、氨氮、正磷酸盐等指标处理效果.实验结果表明,进水平均COD值为1 100 mg/L,氨氮平均进水质量浓度为31 mg/L,正磷酸盐平均进水质量浓度为5 mg/L.经过处理后,出水COD、氨氮和正磷酸盐质量浓度分别为84、4、0.42 mg/L,满足国家二级排放标准.在曝气3 h后COD去除率可达92%以上,氨氮,磷酸盐等指标去除率可达到87%和91.6%.     

重污染河道水解酸化-人工湿地修复工艺技术

目的探寻适合改善我国北方地区重污染河道的一种实用技术,提出水解酸化-人工湿地处理工艺,达到改善其水质的目的.方法分析辽宁省白塔堡河流受污染状况,采用水解酸化预处理,经预曝气装置进行充氧,然后污水经人工潜流湿地进行深度处理的"水解酸化-预曝气-人工湿地"组合工艺对水体水质进行改善.结果白塔堡河污水采用水解酸化-人工湿地技术处理后,出水CODCr、BOD5、TP、TN、NH3-N和SS的质量浓度分别为20~30 mg/L、5.5~14 mg/L、0.11~0.47 mg/L、14~24 mg/L、2.3~7.6 mg/L和8~16 mg/L.系统对CODCr、BOD5、TP、TN、NH3-N和SS的去除率分别为75%~90%、90%~95%、90%~97%、50%~67%、76%~91%和79%~90%.结论水解酸化-预曝气-人工湿地技术处理白塔堡河污水能够取得良好的效果,出水水质中除ρ(TN)和ρ(NH3-N)较高外,CODCr、BOD5和TP的平均出水质量浓度均达到了《地表水环境质量标准》(GB3838—2002)中的Ⅴ类标准.     

厌氧-SBR法处理啤酒模拟废水的工艺研究

采用厌氧-SBR法处理啤酒模拟废水,考察其对啤酒废水的处理效果.实验结果表明,进水平均COD为2 174 mg/L,氨氮平均进水质量浓度为31 mg/L,正磷酸盐平均进水质量浓度为5 mg/L.经过处理后,出水COD、氨氮和正磷酸盐分别为84、4、0.42 mg/L,满足国家排放标准.厌氧-SBR方法处理啤酒废水效果明显,运行稳定,具有一定的可行性.     

氨基乙酸生产废水生化法处理的可行性研究

对经过电解预处理的氨基乙酸生产废水进一步采用UASB-SBBR工艺处理的可行性进行了试验研究。试验表明:在UASB启动阶段,接种高活性厌氧颗粒污泥后,在调节进水水质、合理控制进水COD质量浓度的条件下培养驯化,厌氧颗粒污泥能适应降解氨基乙酸废水水质,UASB的COD平均去除率达到60.8%;厌氧出水再经SBBR处理后,出水COD质量浓度可降低到150mg/L以下,COD平均去除率为96.1%;出水氨氮质量浓度低于25 mg/L。     

混凝沉淀-IC-BIOFOR处理高浓度乳酸废水

用混凝沉淀-IC-BIOFOR处理高浓度乳酸废水,当进水COD在10 000～13 000 mg/L、BOD5在4 000～5 500 mg/L、SS在5 000～8 000 mg/L时,出水COD、BOD5、SS分别小于100 mg/L、20 mg/L、70 mg/L,COD、BOD5、SS的去除率分别超过99%、99%、98%。色度由1 100倍降低到30倍;出水各项指标达到《污水综合排放标准》(GB8978-1996)一级标准要求。     

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.