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首页> 外文会议>Water Environment Federation annual technical exhibition and conference;WEFTEC 2003 >COLD TEMPERATURE BNR USING INTEGRATED FIXED-FILM/ACTIVATED SLUDGE (IFAS) HYBRID TECHNOLOGY
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COLD TEMPERATURE BNR USING INTEGRATED FIXED-FILM/ACTIVATED SLUDGE (IFAS) HYBRID TECHNOLOGY

机译：采用固定膜/活性污泥（IFAS）混合技术的低温BNR

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摘要

This paper presents the results of a full-scale demonstration project at the Donner SummitPublic Utility District to upgrade the plant for cold weather BNR using a Looped Cordfixed-film media known as AccuWeb. DSPUD, located in Soda Springs, CA, receiveda strict new ammonia and nitrate permit from the California Board of Water Quality. Thetwo existing circular activated sludge package plants have a design average dry weatherflow of about 520,000 gpd combined, but nitrification was unlikely due to extremely coldinfluent wastewater; as low as 4 degrees C, during the winter. A potential solutioninvolved the addition of a high surface area fixed-film media to enhance the Sludge Ageof the mixed liquor and the addition of an anoxic zone at the influent end of the aerationbasin for denitrification. The AccuWeb fabric was mounted on stainless steel frames andplaced directly into the mixed liquor of the aeration basins to create a growth site for afixed population of biomass in addition to the current suspended growth population. Thishybrid system is known in the wastewater community as Integrated Fixed-Film/ActivatedSludge (IFAS) Technology.
机译：本文介绍了在Donner SummitPublic Utility District进行的全面示范项目的结果，该项目使用称为AccuWeb的环状固定胶片介质将工厂升级为寒冷的BNR。位于加利福尼亚州苏打温泉的DSPUD已从加利福尼亚州水质局获得了严格的新氨和硝酸盐许可。现有的两个循环式活性污泥包装厂的设计平均干燥天气流量合计约为520,000 gpd，但由于极冷的废水难以硝化。冬季低至4摄氏度。一种可能的解决方案包括添加高表面积的固定膜介质，以提高混合液的污泥年龄，并在曝气池的进水端增加一个用于反硝化的缺氧区。 AccuWeb织物安装在不锈钢框架上，并直接放置在曝气池的混合液中，以创建一个固定的生物量除当前悬浮的生长种群外的生长场所。这种混合系统在废水领域被称为固定膜/活性污泥（IFAS）综合技术。

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