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7. Review on the design and construction of a large wastewater treatment plant Abstract: The largest municipal wastewater treatment plant (WWIP) in the Netherlands is the WWTP Houtrust in The Hague. This plant with a capacity of 1 100 000 population equivalents will occupy an area of merely five ha. Due to the limited area the plant is built in three successive phases as an extension of the existing primary sedimentation plant. This paper focuses on the design and construction of the secondary wastewater treatment and sludge handling. The UNOX system, developed by Union Carbide and later by Linde, one of the advanced treatment systems with adequate full scale experience, was chosen. This system uses pure oxygen to aerate and therefore operates on activated sludge with extremely good settling properties. Construction of the extensions of the existing sedimentation plant with the UNOX system started in 1986 and was expected to be completed at the end of 1988. 8. Foundation construction within wastewater-treatment plant Abstract: The entire foundation design and construction histories of a project built inside an existing wastewater-treatment plant are described. The foundation type decision process, based on the subsurface conditions, the existing structure's performance, and the proposed facility's constraints are outlined. In addition, the foundation construction histories, including foundation specifications, construction dewatering and monitoring, pile-load-test results and production pile driving records, are summarized. Weak soils existed to significant depths over the entire site as did a high ground-water table. Since the elevations of the bases of the structures varied significantly, it was also cost effective to vary foundation type depending upon the estimated load-carrying capacity of the soil at the base of the proposed foundations. Consideration also had to be given to the possibility of detrimental total and differential settlements as a result of dewatering as well as differences in foundation type between existing and proposed structures. This project demonstrated that a properly designed and adequately executed foundation construction program can effectively eliminate the need for expensive underpinning of nearby existing facilities. And, pile load test is a reliable tool to establish the driving criteria, to confirm the design assumptions, and to economize the required pile length. (3 refs.) 9. Yannawa wastewater treatment plant (Bangkok, Thailand): Design, construction and operation Abstract: Yannawa. Wastewater Treatment plant (Phase 1) serves a population equivalent of 500,000 and is located on a restricted site within the city of Bangkok, Thailand. Secondary treatment is based on the CASS? sequencing batch reactor (SBR) process and the plant is one of the largest multi-storey SBRs in the world. The limitation of available site area, the ground conditions and the characteristics of the wastewater to be treated set a series of challenges for the designers, contractors and commissioning and operational staff. This paper briefly describes the collection system, the process selection and the treatment streams of the wastewater treatment plant. The SBR secondary treatment plant is described in more detail. The problems that arose during commissioning and operation and the solutions made possible by the use of an SBR type of process are discussed. Details of plant performance during performance testing and during the first three years of plant operation are provided. ? Earth Tech Engineering Ltd 2004. (6 refs.) 真的很着急 那位高手能帮帮忙啊 谢谢了 [ Last edited by 十一月臭盆 on 2012-4-14 at 11:20 ] |
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银虫 (正式写手)
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Mally89: 金币+1, 感谢应助！~欢迎常来！~好运！~\(^o^)/~ 2012-04-14 12:50:42
Mally89: 金币+1, 感谢应助！~欢迎常来！~好运！~\(^o^)/~ 2012-04-14 12:50:42
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7.《污水处理厂的设计结构研究进展》 摘要：荷兰最大的城市污水处理厂是位于海牙的WWTP Houtrust.该厂具有处理相当于100000人口排放废水的能力，占地仅5公顷。受地域限制，该厂仅建有三级连续的处理设施，用作现存的污水初期沉降处理厂的后续处理设施。本文主要叙述2级污水及淤泥处理设施的设计与构造。使用Union Carbide及后来的Linde公司开发的一种经过了充分实践的先进处理系统——UNOX系统。该系统通过加入纯氧，使活性污泥具有相当不错的沉淀性质。1986年开始建造使用该UNOX系统的污水沉降处理厂后续处理设施，并预计到1988年底完成。 |
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8.《污水处理厂的基础结构》 摘要：本文总结了现存污水处理厂建造工程中全部的基础设计及构造的历史。概述了基于地表条件、现存结构性能以及相关设施局限性的污水处理设施结构类型的设计方案。同时也概述了包括基础规格、施工脱水与监测、试桩结果以及生产桩记录的相关基础构造历史。整个厂区一定深度的软土壤存在常常说明该区域地下水位高。由于建筑结构的基底高度的显著改变，使得依赖于土壤负载能力的拟定基础结构基底的结构类型需要改变，这种改变是相当耗财耗力的。由于脱水以及现存与拟定的基础结构类型的不同，不得不考虑潜在的各种危害和差异沉降。通过对基础结构合理地设计及恰当地实施，可证明该工程能有效地避免使用昂贵的支柱去支撑现存设备。此外，试桩是建立此类运行标准的一种切实可行的方法，可以用于判断相关设计设想的可行性，且节省所需桩的长度。（参考3） |
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十一月臭盆: 金币+7, 翻译EPI+1, ★有帮助, 谢谢 2012-04-14 15:52:21
十一月臭盆: 金币+7, 翻译EPI+1, ★有帮助, 谢谢 2012-04-14 15:52:21
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9. .Yannawa 污水处理厂（曼谷，泰国）的设计、结构及运行 摘要：Yannawa 污水处理厂是一家能处理相当于500000人口排放污水的污水处理厂，该厂坐落在泰国曼谷城一个有限的区域。2级污水处理建于CASS序列组反应器（SBR）程序基础上，Yannawa 污水处理厂是世界最大的多层序列组反应器（SBRs）的污水处理厂之一。受区域内可用面积的局限，以及地面条件和所处理的污水特性，该厂设计人员、承建商以及试车和操作人员都曾面临着各种各样的挑战。本文概括性叙述了该污水处理厂的收集系统、选择程序及污水处理机组，详细地介绍SBR 2级处理设备，对试运转和运转以及使用SBR类型的程序待解决的问题进行了讨论。提供了设备测试及运转的开始3年中的详细性能参数。Earth Tech Engineering Ltd（全球工程技术有限公司） 2004. (参考6.) |
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