Invention Application
- Patent Title: Process for direct filtration of wastewater
- Patent Title (中): 废水直接过滤工艺
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Application No.: US09805866Application Date: 2001-03-14
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Publication No.: US20020079267A1Publication Date: 2002-06-27
- Inventor: E. Stuart Savage , David C. Slack
- Main IPC: B01D024/46
- IPC: B01D024/46

Abstract:
A process for removing BOD and suspended solids from wastewater without passing through a primary clarifier or secondary aeration tank, the process. During the process, raw sewage wastewater, comprising soluble BOD, insoluble BOD and suspended solids, is piped directly to a deep bed granular filter. The bed depths of deep bed filter are within a range of approximately 2.0 ft to approximately 10.0 ft. The raw sewage wastewater is filtered by filtration through the deep bed filter in which the filter media is a granular media with a size range between approximately 2.0 mm to 10.0 mm. Backwashing the deep bed filter occurs at least once every 48 hours.
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