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。     

微电解—好氧组合工艺处理中药废水的研究

采用"微电解-好氧"组合工艺进行了中药生产废水(COD=600～950 mg@L-1,色度=160～240倍)处理的试验研究.研究表明微电解混凝工序的COD和色度去除率分别为60%和85%左右,同时改善了废水的可生化性能;好氧阶段的最佳有机物负荷率为1.2～1.6kgCOD@m-3@d-1,常温下COD去除率在75%～80%之间.出水符合《污水综合排放标准(GB 8978-1996)》中一级标准的要求.     

厌氧+SBR处理酱油模拟废水的研究

为考察厌氧-SBR法对酱油废水处理效果的影响因素,对废水的COD、氨氮、正磷酸盐去除效果进行研究,同时在实验后期对酱油废水进行脱色处理.研究结果表明,进水COD为2 000 mg/L左右,氨氮在80.7 mg/L左右,正磷酸盐在9.7 mg/L左右,COD去除效率为96%、氨氮的去除率为95%、磷的去除效率97%.酱油废水色度为200倍,聚合氯化铝投加10～40 mg,活性炭投加1.5～3.0g,出水色度降至50倍以下.     

好氧法处理抗生素废水对比试验研究

通过对比分析3种好氧活性污泥法的试验结果,表明用SBR运行工艺处理土霉素、庆大霉素发酵废水可实现高进水浓度、高容积负荷的工程处理效果:处理工艺在连续曝气、连续进出水(即普通曝气法)条件下,COD平均去除率为79.5%(进水COD浓度537.4～663.1mg.L-1,平均出水COD为128.6mg.L-1);在间断曝气、曝气期内连续进水连续出水(即间断曝气法)条件下,COD平均去除率为72.7%(进水COD浓度537.4～1544.0mg.L-1,平均出水COD浓度为315.5mg.L-1);在间歇曝气、定时进水出水(即SBR法)试验条件下,COD去除率可达78.7%～88.4%(进水COD浓度1600～12000mg.L-1,出水COD浓度357.3～2500mg.L-1).     

SBR工艺处理模拟酱油废水及混凝脱色研究

酱油废水中含有大量有机物,废水中COD和色度很高,本实验用SBR工艺去除模拟酱油废水中的COD和氨氮,并用混凝工艺去除色度,实验表明,在pH为7,曝气3 h时,COD的去除率达到86.9%,随着时间的延长,COD与氨氮的去除率分别达到94.9%、83.7%.SBR出水用混凝工艺去除色度,色度可降到40倍左右.     

三维电极-电Fenton法处理孔雀石绿染料废水研究

目的研究三维电极-电Fenton法降解孔雀石绿废水的处理效果及各因素对废水色度和COD去除率的影响.方法控制反应时间、初始pH值、电解质种类和质量浓度、电解电压、极板间距和曝气强度,分析色度和COD去除效果.结果单因素试验结果表明:色度为500~600倍,COD质量浓度为500~600 mg/L的孔雀石绿废水在pH为3,电解质Na2SO4质量浓度为5 g/L,电压16 V,极板间距9 cm,曝气强度为0.8 L/min的条件下反应120 min,脱色率和COD去除率分别达到了91.97%和70.61%,出水色度为40.67倍,出水COD质量浓度为149.69 mg/L.满足《纺织染整工业水污染物排放标准》(GB4287—2012)间接排放标准.结论三维电极-电Fenton法能够有效处理孔雀石绿染料废水,对废水的色度和COD均有较高的去除率.     

曝气生物滤池处理生活污水的实验研究

采用陶粒为滤料的曝气生物滤池处理生活污水,考察水力停留时间(HRT)、曝气量、pH值对处理效果的影响.实验结果表明,在水力停留时间为3~6 h时,对出水COD去除率可达83.7%~90%,对氨氮去除率可达85%以上;在曝气量为0.08~032 m3/h时,对出水COD去除率可达到83.4%~86.8%,出水氨氮最高去除率可达85.2%.pH值在6.57~8.72之间对COD、氨氮基本没有影响.曝气生物滤池处理的生活污水出水COD、氨氮均可达到国家二级出水的标准.     

高盐度化学制药废水预处理试验研究

采用"蒸馏+铁炭内电解+絮凝"工艺对某制药企业排放的废水进行预处理。经过蒸馏脱盐后,综合废水盐度(质量分数,下同)由7.4%降至0.15%;再采用"铁炭内电解+絮凝"工艺进行处理,内电解试验最佳工艺条件:进水pH值为3.0、铁炭比为4∶1(体积比)、停留时间为6 h,COD去除率达到26.5%;絮凝试验最佳pH值为9.0,COD去除率达到1.5%。废水经过预处理后,COD去除率达到28.0%,出水COD质量浓度(下同)降至20 988 mg/L,ρ(BOD)5/ρ(COD)由0.28提高至0.41。预处理出水厌氧可生化性试验表明,当进水COD质量浓度为9 000 mg/L左右时,容积负荷(COD)为1.0 kg/(m3.d),出水COD质量浓度降低至2 100 mg/L左右,COD去除率达到75.0%。说明该制药废水经过预处理后可生化性显著提高,为后续的生化处理创造了有利条件。     

水解酸化—Fenton试剂氧化处理牛仔服装洗水废水试验研究

采用水解酸化—Fenton试剂组合工艺对某牛仔制衣厂洗水废水进行处理。确定了水解酸化最佳反应时间为8h,考察了硫酸亚铁投加量、双氧水投加量、反应时间及pH值对洗水废水的色度及COD去除率的影响,通过正交实验确定了Fenton试剂处理该废水的最佳操作条件为:反应时间30min、双氧水(30%)投加量4mL/L、硫酸亚铁投加量300mg/L、pH值为4左右。在最佳条件下,色度与COD去除率分别达到95%和88%以上,出水COD值为145mg/L左右,水质澄清,符合GB 8978—1996《污水综合排放标准》中的二级标准,可达标排放。     

曝气生物滤池前置反硝化去除COD、NH4+-N和总氮研究

为了满足出水总氮的要求,采用前置反硝化工艺完成脱氮过程。本文对曝气生物滤池前置反硝化工艺脱氮、去除COD的工艺性能进行研究,结果表明,系统对COD的去除主要发生在好氧柱,好氧柱出水基本比较稳定,系统出水COD浓度始终保持在50mg/L以下,COD去除率在83%以上;系统对氨氮有较高的去除效果,出水氨氮浓度低于4mg/L,去除率在80%以上;系统对总氮的去除率在40～50%之间。系统对总氮的去除率不高。     

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.