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

机译：AA级地表水：MBR处理厂设计和施工经验在混凝土，华盛顿

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The Town of Concrete, Washington, a rural community of about 950 persons located in the front range of the Cascade Mountains, has been in critical need of a new wastewater treatment plant to replace a lagoon treatment facility that is frequently out of the permit discharge limits for BOD5 and total suspended solids. The effluent is discharged to the Baker River which has the highest surface water quality classification (AA – extraordinary) because it is an important habitat for protected species of fish under the Endangered Species Act, including native Chinook salmon. Therefore, the Town’s goals for a new treatment plant include not only the need to increase treatment capacity and comply with existing permit requirements, but to provide the highest effluent quality achievable to mitigate in-stream flows and enhance fish habitat in the Baker River. The Town primary design criteria for the new wastewater treatment plant were to: 1. Meet the effluent water quality goals using MBR technology. 2. Expandable to accommodate the projected flow increases. 3. Keep the existing lagoon system in full operation during construction of the new plant. 4. Capability to operate successfully with the operator spending not more than a few hours each week on-site. The plant is currently under construction with an anticipated completion time in December 2007. The plant design flows are 160,000 gpd annual average day and a maximum day flow of 320,000 gpd. The MBR system includes two parallel trains, a thickener (small membrane unit) and two aerobic digesters for waste sludge treatment; and treatment of the recovered supernatant from the thickener. Pre-treatment consists of dual 3-mm microstrainer units; a grit collector; and soda ash feed system. The disinfection system consists of two parallel UV reactor units. If needed, the plant capacity can be expanded to provide a maximum day flow of 480,000 gpd with the addition of additional membranes in the MBR basins. The purpose of this paper is to provide and overview of the: 1. project design criteria development; 2. MBR system selection process; 3. Challenges during construction; and 4. anticipated startup and operations approach.
机译：华盛顿（华盛顿）的镇，一个大约950人位于级联山脉前方的950人，一直处于一个新的废水处理厂，以取代泻湖治疗机构，这些设施经常出于许可证排放限制对于BOD5和总悬浮固体。流出物被排放到面部水质分类（AA非凡）的贝克河上，因为它是濒危物种法案下的受保护物种的重要栖息地，包括母语的奇努克鲑鱼。因此，该镇的新治疗厂的目标不仅包括增加治疗能力并遵守现有许可要求的必要性，而且可以提供最高的污水质量，以减轻流动的流动和增强面包河的鱼栖息地。新废水处理厂的城镇主要设计标准是：1。使用MBR技术满足污水水质目标。 2.可扩展以适应投影流量增加。 3.在新工厂的建设期间保持现有的泻湖系统完全运行。 4.能够成功运营，运营商在现场每周支出不超过几个小时。该工厂目前正在建设中，预计2007年12月的完工时间。植物设计流量为160,000 GPD年平均日，最长日流量为320,000 GPD。 MBR系统包括两个平行列车，增稠剂（小膜单元）和用于废物污泥处理的两种有氧消化器;从增稠剂中回收上清液的处理。预处理由双3毫米微带器单元组成;砂砾收集器;和苏打灰饲料系统。消毒系统由两个平行的UV反应器单元组成。如果需要，可以扩展植物能力以提供480,000gPD的最大日流量，并在MBR盆地中添加额外的膜。本文的目的是提供和概述：1。项目设计标准开发; 2. MBR系统选择过程; 3.建造期间的挑战;和4.预期的启动和操作方法。

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