4. Filtration
This is the fourth stop on the Tour
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4. Filtration This is the fourth stop on the Tour |
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There are eight filters. The filters are 40-feet wide, 40-feet long, and 17-feet deep with a total filter area of 1,530 square feet. The water is filtered through 52 inches of anthracite coal. Each piece of coal is less than 1/8-inch in diameter. One filter can process more than 700,000 gallons of water every hour. |
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When all the filters are working at the same time, a total of 120 million gallons of water can be filtered in a single day. This picture shows an empty filter. You can see the right and left bays with a concrete trough running down the middle. |
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Separate filter beds allow the operators to clean one bed while the others are still filtering. This is done by forcing water up through the filters to dislodge the particles that have been caught in the coal. This water runs down the center trough and on to the Washwater Pond. The filter sides are cleaned with a high pressure hose. |
Anthricite Coal
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Pipe Gallery - Each pipe is color-coded to correspond with the type of water flowing through it. The pipes are also labeled with a large black number to show which filter they are connected to. Click on the photo to see more pictures and learn more about the Pipe Gallery.
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Next Stop - Disinfection
To continue on the tour click NEXT or you can move to any stop on the tour by clicking stops listed below.
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Filtration |