CWSBR工艺处理市政污水工程的设计与运行

大连夏家河污水处理厂引用德国CWSBR工艺处理市政污水,通过改变生化池运行周期的进水次数和控制溶解氧浓度,提高了工艺脱氮除磷的性能,处理后水质达到<城镇污水处理厂污染物排放标准>(GB 18918-2002)的一级A标准.     

合肥市朱砖井污水处理厂提标改造设计与研究

随着巢湖水体污染的加重,国家对包括巢湖在内的"三河三湖"治理高度重视,对巢湖流域内的污水处理厂提出了更高的出水标准,2012年9月开始实施了合肥市朱砖井污水处理厂提标改造工程,设计出水水质要求达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。通过对实际进水水质和原有工艺充分的调查和分析,提出了针对进水"低碳高氮磷"特点的"CASS反应池改造和活性砂滤池深度处理方案",并增加碳源投加装置,提高污水中总氮的去除率。2014年3月完成环保验收以来,出水水质优于一级A标准。详细介绍了该工程的提标改造方案、应对低碳高氮磷进水的处理措施、主要构筑物的设计参数及工艺特点。     

CASS工艺在中小城镇污水处理厂的应用

成都某城镇污水处理厂建设规模为4×104 m3/d,分两期建成,一期建设规模为2×104 m3/d,采用CASS工艺,设计进水水质依据城市中等污染物浓度水质确定,出水水质执行<城镇污水处理厂污染物排放标准>(GB 18918-2002)的一级A标准.     

山东省某工业园污水处理厂改扩建工程设计

山东省某工业园污水处理厂原设计采用厌氧滤池+氧化沟工艺,出水水质执行《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。由于该污水厂已超负荷运行,且进水水质不稳定、原设计存在不合理处等原因,导致污水处理厂出水水质不能稳定达标,需进行改扩建。改扩建工程采用了初沉池+A~2O+二沉池+混凝沉淀+纤维转盘滤池工艺,出水水质稳定达标。     

城市污水处理厂设计进水水质的确定方法

城市污水处理厂进水水质是工程设计的基本参数，进水水质的测定分析对污水处理厂的设计具有重要意义。对西安市2座城市污水处理厂的进水水质进行了调查和分析，提出按照水质指标浓度出现的频率（85％的保证率）确定污水处理厂设计进水水质的方法。     

高淳污水处理厂二期工程工艺设计

高淳污水处理厂二期工程采用多点进水倒置A2/O氧化沟工艺,其处理规模为2×104m3/d,出水水质稳定达到《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准。介绍了其工艺流程、设计特点及设计参数,以供设计人员参考。     

在线水质仪表在城市污水厂节能中的应用

随着经济的发展以及环保要求的不断提高,需要建设越来越多的污水处理厂,对污水处理厂的排放标准也日益严格,污水处理厂的优化运行显得尤其重要。目前大部分污水处理厂只有当出水水质超标时才会改变运行方式,只要出水水质达到排放标准就维持保守的运行方式。当进水负荷变化时,出水指标就会产生波动。而且,当进水负荷偏低时,会造成浪费。在线水质仪表在污水处理厂的应用,使得实时监测进水负荷成为可能,也为污水处理工艺的优化控制奠定了基础。实践证明,通过实时监测进水负荷,利用各种数学模型,结合现代控制理论,对污水处理厂进行优化运行,能够提高处理效率、节能降耗、减少运行成本和碳排放。通过对进水负荷的快速响应,能够增强系统的稳定性,抵抗冲击负荷。     

青岛市某污水处理站设计运行及合理化建议

青岛市某污水处理站进水主要为生活污水,设计出水水质达到GB 18918—2002《城镇污水处理厂污染物排放标准》中的一级A标准。论文结合工程案例,介绍了污水处理站的工艺设计,并提出合理化建议。     

ABAF/OBAF工艺用于提标改造工程的调试与运行

太湖流域污水处理厂出水水质需达到<城镇污水处理厂污染物排放标准>(GB18918-2002)的一级A标准,为此浙江省湖州碧浪污水处理厂提标改造工程采用ABAF/OBAF前置生物膜脱氮污水处理工艺对生活污水进行深度处理.实际进水浓度低于设计值,通过调整运行工况和参数,使出水水质达标.提标工程的运行费用为0.17元/m3.此外,还对该工艺运行中存在的几点关键问题进行了分析并提出相应的对策.     

寿阳县污水处理工程设计

针对寿阳县污水状况及城市规模,对该县污水处理厂污水工程设计进行了探讨,结合进水水质、出水标准,并综合考虑运行、管理等因素,对A/A/O工艺的可行性作了具体分析,经分析论证该工艺可用于该县污水处理工程。     

水利水电工程及其周缘地区诱发地震危险性小区划研究

针对水利水电工程及其周缘地区诱发地震危险性的空间非均匀性，提出了诱发地震小区划的基本思想，初步探索了一种适合于水利水电工程及其周缘地区诱发地震危险性小区划研究的理论模型和方法，并以长江三峡工程库首及其周缘地区为例，对其诱发地震危险性进行了小区划试验研究。     

基于三峡工程背景下鄱阳湖地区防洪策略分析

从三峡工程防洪调度出发,对鄱阳湖区当前的防洪形势、存在的问题以及新的治水思路、三峡工程、流域水利工程等对湖区防洪格局的影响进行了探讨,并提出了相应防洪减灾对策,旨在为今后鄱阳湖的综合整治奠定基础。     

Antecedents of trust in intra-organizational relationships within three Singapore public sector construction project management agencies

This paper examines the role and nature of trust in construction project management performance. Three causes, or antecedents, of trust are identified: results, integrity and concern. A questionnaire survey of construction project team members employed by three public sector infrastructure organizations in Singapore is described. The results confirm the expected correlations. Concluding remarks suggest that enlightened management is needed to keep the three antecedents in reasonable balance.     

Web‐based integrated project control system

This paper presents a system that supports project time and cost control in an integrated manner. The system utilizes object‐oriented modelling to represent the process of project delivery. A set of control objects is designed to map the process of project control. Eighteen key indicators are considered to represent the resources utilized in each control object and serve as sensors to highlight problematic areas associated with unfavourable performance. A Three‐Tier Client/Sever computer system is designed to implement the developed system. Daily, weekly, monthly and/or yearly, period‐by‐period, and cumulative to‐date project performance reports are generated to provide the status at project, control object and resource levels. An example drawn from the literature is analysed to allow for comparison with the results obtained using the proposed methodology. The example also serves the purpose of demonstrating the use of the proposed system and illustrating its essential features.     

房地产开发项目实施阶段应用PMC模式关键问题研究

目前在部分房地产开发项目实施阶段中出现了PMC这一新的项目管理模式。文章以部分项目为背景,分析了该种模式出现的原因及后续普及的可能性。重点针对工程建设过程中可能制约该种模式应用的关键问题,分析了房地产公司与PMC承包商之间合作关系及合同责任的确定、项目管理部的组织结构设计和项目中其他参建方合同关系设计3个方面。文章在PMC承包商的管理范围与责任、项目管理部的组织与人员配备、项目中各参建方合同与组织关系方面形成了结论,期望对采用此类方式运作的项目给予理论上的支持。     

Parametric analysis of the financing cost in a building project

A parametric model is presented for the evaluation of financing cost in a construction project. The cost can be assessed at a very early stage of the project's design. The main parameters that are examined are the duration of the project, its pattern of cost and sales distribution, the cost of owner's equity capital and of external debt. Three financing options are examined and their effect on the financing cost is evaluated. The influence on the cost of financing of the main decision variables, such as the construction duration or the profit margin, is also examined.     

Linking project health to project performance indicators: Multiple case studies of construction projects in Saudi Arabia

This research presents an empirical study of the relationship between project health and project performance in the project delivery context. Based on an existing Project Health Check (PHC) framework, the relationship has been tested in terms of a set of predefined indicators through the use of case study approach. The Swiss Cheese model was employed as a guiding principle to represent the links between PHC indicators and project Key Performance Indicators (KPIs). Three cases of construction projects in Saudi Arabia were investigated through a comprehensive review of the project performance history, using current performance indicators to establish the first slice of the Swiss Cheese model. PHC assessments were then conducted to shape the second slice of the model, which represent the maturity level of the project management. The relationships between the two slices were obtained from semi-structured interviews with the project managers. These relationships were analysed qualitatively by tracking patterns across the three cases. The result was used to develop the Swiss Cheese Performance Management Framework, which can potentially serve to help project managers identify the root causes of any shortcomings at the early stage in the project delivery process. This in turn can assist project managers in managing the overall project performance more effectively.     

三峡工程库区淹没工业项目投资决策模型研究

结合三峡工程库区淹没工业项目拆迁，应用层次分析法，将各种影响项目的因素用定量方式表示，并考虑资源有限性的制约，建立拆迁项目投资优化决策模型，为三峡工程的迁建工作提供一项有效、全面、实用的决策方法。     

标志性与生活化的长江走廊——重庆万州北滨路景观设计

对万州北滨路景观设计的理念与创新进行了介绍。项目通过对"城市、人、滨江走廊、长江"四者关系的梳理,打造"江在城中游,人在江岸行,岸随江潮落"三环紧扣的立体景观。项目的成功实施,为三峡库区城市滨水公共开放空间设计提供了一个可持续发展的范例。     

大空间三维扭曲石膏板墙体施工技术

2010年上海世博会西班牙馆内装饰工程,采用大空间三维扭曲石膏板墙体,施工工艺复杂且无现成的工程实例可供参考,在实际施工中,通过对早期方案中的问题进行总结、分析,并结合具体工况不断地改进和创新,保证了3200m<'2>大空间三维扭曲石膏板墙体施工的顺利完成,取得了明显的技术效果和良好的经济、社会效益.