Performance of intermittent sand filters : effects of hydraulic loading rate, dosing frequency, media effective size, and uniform coefficient
Title
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Performance of intermittent sand filters : effects of hydraulic loading rate, dosing frequency, media effective size, and uniform coefficient
Personal Author
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Mohd. Asri Md. Nor
Publication Information
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Davis, CA : University of California, 1991
Physical Description
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vi, 79 p. : ill. : 30 cm.
General Note
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Loan in microfilm form only : MFL 7807 ra
Abstract
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Twelve small-scale intermittent sand filters were loaded with primary effluent under field conditions. The depth of sand used was 381 mm, shallower than typical. The effects of hydraulic loading rate, dosing frequency, media size, and uniformity coefficient on the performance of the filters were observed for 86 days. Hydraulic loading rates ranged from 41 to 652 L/m2-d and dosing frequencies were 4, 12 and 24 times/day. The effective size of the media ranged from 0.29 to 0.93 mm. Uniformity coefficients of 4.52 and 1.42 were used. Removal of turbidity, total suspended solids, 5-day biochemical oxygen demand, chemical oxygen demand, organic nitrogen, and ammonia were used as a measure of performance. More than 90 percent removal of all parameters except chemical oxygen demand was achieved in the shallow sand filters at a hydraulic loading rate of 163 L/m2-d when dosed at 12 or 24 times/day regardless of media size.
Subject Term
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Filters and filtration
Water -- Purification -- Filtration
Sewage -- Purification -- Filtration
Added Corporate Author
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University of California, Davis
Thesis (M.Sc in Civil Engineering) - University of California, 1991
Library | Item Barcode | Call Number | Material Type | Item Category 1 |
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Perpustakaan Raja Zarith Sofiah | 30000001828049 | TD445 M27 1991 raf | Closed Access Thesis | UTM Master Thesis (Closed Access) |