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1.
为了有效解决生活污水所造成的环境污染问题,设计了智能化AOS生物增强装置,在进水温度为23~28℃、水力停留时间为6~8 h、处理水量为1.0 m~3/h的条件下,考察了该装置对生活污水的处理效能.试验结果表明,当进水COD_(Cr)为273.99~428.07 mg/L,氨氮为7.21~8.18 mg/L,总氮为33.06~37.58 mg/L,总磷为3.36~4.34 mg/L时,装置对COD_(Cr)、氨氮、总氮和总磷的平均去除率分别为87.23%,39.27%,57.93%和88.57%,出水水质指标符合《城镇污水处理厂污染物排放标准》(GB18918—2002)中一级A的排放标准.该装置具有占地面积小、自动化程度高、处理效果好等优点,是一种适用于生活污水的处理装置.  相似文献   

2.
根据厌氧-好氧活性污泥法(A/O)工艺原理,设计A/O一体化污水处理装置,并利用它进行处理生活污水的中试试验。在进水流量为1 m3/h,污泥回流比为200%,总停留时间为5~8 h,水温为4~14℃的条件下,考察该装置对生活污水的处理效果。试验结果表明,装置在启动2周后开始稳定运行;当进水总磷质量浓度为4.2~12.9 mg/L,总氮质量浓度为40.0~80.0 mg/L,氨氮质量浓度为5.4~30.7 mg/L,化学需氧量(CODcr)为161.3~441.4 mg/L,五日生化需氧量(BOD5)为43.0~196.0 mg/L时,装置对总磷、总氮、氨氮、CODcr和BOD5平均去除效率分别为86.7%,69.5%,80.0%,84.7%和84.9%,出水可达《城镇污水处理厂污染物排放标准》(GB 18918—2002)二级标准。与传统污水处理工艺相比,该工艺具有占地少、耐冲击负荷能力强、运行管理简便等优点。  相似文献   

3.
以模拟乡镇生活污水为处理对象,利用厌氧污泥接种启动好氧小试反应器,采取连续进水连续曝气的方式,进行构建好氧生物处理系统,考察驯化过程反应器中污染物的去除效率.实验结果表明:常温条件下,模拟生活污水进水量为4 L/d,HRT(水力停留时间)为12 h,进水均值COD(化学需氧量)为400 mg/L,NH~+_4-N(氨氮)为20 mg/L,TN(总氮)为25 mg/L,TP(总磷)为4 mg/L,运行12 d,实验出水COD为39.80 mg/L,NH~+_4-N为0.98 mg/L,TN为8.32 mg/L,TP为0.96 mg/L;运行29 d,COD、NH~+_4-N平均去除效率均可稳定达到90.0%,活性污泥生长良好,初步构建好氧生物处理系统.  相似文献   

4.
水解酸化—好氧生物处理焦化废水的试验研究   总被引:2,自引:0,他引:2  
对处理焦化废水的两种工艺的试验研究表明,采用水解酸化-好氧生物处理较单一好氧生物处理可取得良好的效果。水解酸化作为焦化废水的预处理比较适宜。当实际焦化废水进水CODcr浓度为2214mg/L,水解酸化停留时间12h,好氧曝气时间18h,间歇动态试验出水CODcr浓度为172mg/L时,CODcr的去除率达92.23%,满足污水综合排放标准(GB8978-95)的排放要求。  相似文献   

5.
膜-好氧组合工艺处理餐饮废水的研究   总被引:9,自引:0,他引:9  
采用无机膜-好氧组合工艺对高浓度餐饮废水(COD15000mg/L)进行处理,考察进水COD浓度,溶解氧浓度,水力停留时间对好氧反应器处理效果的影响,结果表明,当水力停留时间大于5.6h时,废水的COD去除率高于90%,温度对处理效果影响不大。对好氧出水用无机膜进行分离,最终出水COD小于25mg/L,浊度小于1NTU。  相似文献   

6.
A2/O生物膜系统处理焦化废水工艺参数研究   总被引:3,自引:0,他引:3  
试验采用A2/O生物膜工艺处理焦化废水,对A2/O处理焦化废水的工艺参数进行了优化研究。结果表明,在水力停留时间为39 h(其中:厌氧酸化6 h,缺氧反硝化10 h,好氧23 h),控制好氧段溶解氧质量浓度为3~6 mg/L,出水pH为6.8~8.0,混合液回流比R=3的情况下,可以得到良好的脱氮和除碳效果。  相似文献   

7.
固定化微生物工艺处理印染废水   总被引:3,自引:0,他引:3  
采用固定化微生物工艺,对混凝沉淀后退浆工序的印染废水进行了现场中试处理研究.试验结果表明,在水力停留时间(HRT)为20 h的条件下,对于进水化学需氧量(CODCr)为1.0-1.2 g/L的退浆废水,经过两级水解酸化、两级好氧处理后,其出水CODCr<100 mg/L,达到国家一级排放标准.其中,水解酸化阶段的HRT为10 h,CODCr负荷1.7 kg/(d·m3),去除率为44%;好氧阶段HRT为10 h,CODCr负荷1.9 kg/(d·m3),去除率为83%.在此基础上,建立了好氧反应器内大孔载体固定化微生物降解基质的动力学模型.  相似文献   

8.
对初沉+Fenton+絮凝沉淀+水解酸化+SBR的组合工艺处理紫胶树脂深加工废水影响因素进行了考察,对运行参数进行优化.H2O2投加量1 000mg/L,PAC投加量300mg/L,阴离子PAM投加量6mg/L,水解酸化停留时间48h,好氧停留时间6d时,出水COD 112mg/L,去除率为96%.废水中含有一些不能被水解酸化菌和羟基自由基氧化的物质,更高效有针对性的氧化技术有待研究.  相似文献   

9.
为提高污水脱氮除磷的效率,降低运行成本,对SBR脱氮除磷工艺进行了研究.采用"进水-搅拌-曝气-沉淀-排泥-闲置"的SBR运行模式,在运行工况下通过对COD、氨氮、总磷去除效果的考察来探讨污泥质量浓度、缺氧/好氧时间、p H、溶解氧与脱氮除磷和有机物去除之间的关系,并确定最佳运行条件.实验结果表明,当污泥质量浓度为3 255 mg/L,脱氮除磷效果最好,COD、总磷、氨氮的去除率分别为73.33%、98.90%、85.90%;缺氧阶段p H先快速下降后缓慢下降,聚磷菌大量释磷,在厌氧2.5 h释磷效果达到最佳;在好氧阶段,溶解氧控制在1.05~1.09 mg/L,结合实际情况确定最佳好氧时间为4.0 h.  相似文献   

10.
为进一步解决高含盐化工废水的达标排放问题,以适应更高要求的排放标准,本文采用"厌氧水解-好氧活性污泥-接触氧化"工艺对某化工厂排出的高含盐废水进行处理,并对各处理阶段不同水力停留时间的处理效果进行研究,确定最佳的工艺运行条件.实验结果表明:当进水盐度为1%~2%、COD为300~700,mg/L时,厌氧水解池、好氧活性污泥池和接触氧化池的水力停留时间(HRT)分别为8,h、16,h和15,h,工艺出水COD低于100,mg/L,COD去除率维持在72%~92%,为高含盐化工废水处理厂的升级改造提供了一条可行的途径.  相似文献   

11.
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.  相似文献   

12.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

13.
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。  相似文献   

14.
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  相似文献   

15.
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  相似文献   

16.
17.
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.  相似文献   

18.
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).  相似文献   

19.
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.  相似文献   

20.
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.  相似文献   

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