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首页> 外文会议>Membrane technology 2008 >CLASS AA SURFACE WATER:MBR TREATMENT PLANT DESIGN AND CONSTRUCTION EXPERIENCEAT CONCRETE, WASHINGTON
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CLASS AA SURFACE WATER:MBR TREATMENT PLANT DESIGN AND CONSTRUCTION EXPERIENCEAT CONCRETE, WASHINGTON

机译：华盛顿特区混凝土AA级地表水：MBR处理厂的设计和施工经验

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The Town of Concrete, Washington, a rural community of about 950 persons located inrnthe front range of the Cascade Mountains, has been in critical need of a new wastewaterrntreatment plant to replace a lagoon treatment facility that is frequently out of the permitrndischarge limits for BOD5 and total suspended solids. The effluent is discharged to thernBaker River which has the highest surface water quality classification (AA –rnextraordinary) because it is an important habitat for protected species of fish under thernEndangered Species Act, including native Chinook salmon. Therefore, the Town’s goalsrnfor a new treatment plant include not only the need to increase treatment capacity andrncomply with existing permit requirements, but to provide the highest effluent qualityrnachievable to mitigate in-stream flows and enhance fish habitat in the Baker River.rnThe Town primary design criteria for the new wastewater treatment plant were to:rn1. Meet the effluent water quality goals using MBR technology.rn2. Expandable to accommodate the projected flow increases.rn3. Keep the existing lagoon system in full operation during construction of the newrnplant.rn4. Capability to operate successfully with the operator spending not more than a fewrnhours each week on-site.rnThe plant is currently under construction with an anticipated completion time inrnDecember 2007. The plant design flows are 160,000 gpd annual average day and arnmaximum day flow of 320,000 gpd. The MBR system includes two parallel trains, arnthickener (small membrane unit) and two aerobic digesters for waste sludge treatment;rnand treatment of the recovered supernatant from the thickener. Pre-treatment consists ofrndual 3-mm microstrainer units; a grit collector; and soda ash feed system. Therndisinfection system consists of two parallel UV reactor units. If needed, the plantrncapacity can be expanded to provide a maximum day flow of 480,000 gpd with thernaddition of additional membranes in the MBR basins.rnThe purpose of this paper is to provide and overview of the:rn1. project design criteria development;rn2. MBR system selection process;rn3. Challenges during construction; andrn4. anticipated startup and operations approach.
机译：位于喀斯喀特山脉前段的约有950人的农村社区华盛顿镇，迫切需要一个新的废水处理厂，以取代经常超出BOD5和BOD5许可排放限值的泻湖处理设施。总悬浮固体。废水排放到地表水水质最高的贝克河（AA–非凡），因为它是《濒危物种法》所保护鱼类的重要生境，包括奇努克鲑鱼。因此，该镇建立一个新的污水处理厂的目标不仅包括增加处理能力和遵守现有许可证要求的要求，还包括提供可达到的最高污水质量，以减轻贝克河中的溪流流量并改善鱼类栖息地。新废水处理厂的标准为：rn1。使用MBR技术达到废水水质目标。可扩展以适应预计的流量增加。在newrnplant.rn4的建造过程中，应使现有的泻湖系统保持完整运转。成功运行的能力是操作员每周在现场花费的时间不超过数小时。rn该工厂目前正在建设中，预计于2007年12月完成。该工厂的设计流量为年平均日流量160,000 gpd，最大日流量为320,000 gpd 。 MBR系统包括两个平行的列，一个浓缩剂（小膜单元）和两个好氧消化池，用于废物污泥处理；对从增稠器中回收的上清液进行处理。预处理由两个3毫米微滤器单元组成；砂砾收集器；和纯碱供料系统。消毒系统由两个平行的紫外线反应器单元组成。如果需要，可以在MBR盆地中增加其他膜的情况下扩大工厂的产能，以提供最大480,000 gpd的日流量。本文的目的是提供并概述以下内容：项目设计标准制定; rn2。 MBR系统选择过程; rn3。施工过程中的挑战；安德鲁4。预期的启动和运营方法。

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