sand filter


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sand filter

[′san ‚fil·tər]
(civil engineering)
A filter consisting of graded layers of sand and aggregate for purifying domestic water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sand filter

sand filter: plan
A bed of fine sand which is laid over graded gravel; used to remove impurities from a water supply.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Turbidity removal (%) Sand filter A 95.98 [+ or -] 0.1 Sand filter B 96.10 [+ or -] 0.2 Note: Table made from bar graph.
Conventional sand filter media exhibited higher efficiency in removal of both Total solids and Total suspended solids.
The evaluation of backwash performance in pressurized sand filters used in irrigation is a complex procedure, due to the variability of the operating conditions and the number of factors intervening in the phenomenon, which still requires deepening in methodology and normatization.
Therefore, to ensure good quality of recycle water the used ablution water should be treated through sand filters [12] with sand media having effective size ranging between 0.3 and to 1.0 mm, and uniformity coefficient should be range between 1.3 and 1.7 [13].
(2) The average removal rate of DiOP in influent of the process by coagulating sedimentation unit was 6.25%; the average removal rate of DiOP in effluent of coagulating sedimentation by ozone contact column unit was 19.05%; the average removal rate of DiOP in effluent of ozone by biological sand filter column was 17.05%; the average removal rate of DiOP in effluent of biological sand filter column by active carbon column was 51.36%.
Traditional high-rate sand filters operate on the premise of "depth filtration," with soil particles being trapped in the bed of silica sand.
Sand Filter Pump Treatment Upgradient Pooled chamber unit lysimeter downgradient Mean 4.96 92.64 61.73 12.75 std 4.49 5.51 7.18 5.42 CV 0.91 0.06 0.12 0.42 n 9 10 10 28 Aerobic Treatment Unit Upgradient Upgradient Treatment Downgradient Downgradient lysimeter piezometer unit lysimiter piezometer Mean 22.52 6.31 24.30 2.98 7.57 std 5.31 4.21 7.49 1.82 1.70 CV 0.24 0.67 0.31 0.61 0.22 n 10 10 10 10 10 Unlined Pressurized Sand Filter Beds Siphon Pooled chamber downgradient Mean 63.88 45.4 std 18.24 18.7 CV 0.28 0.41 n 9 18 Shallow Pressure Trenches Upgradient Pump Downgradient Downgradient lysimeter chamber lysimeter 2 lysimeter 3 Mean 4.96 92.64 61.73 12.75 std 4.49 5.51 7.18 5.42 CV 0.91 0.06 0.12 0.42 n 9 10 10 28
Not only can a recirculating sand filter reduce the level of total nitrogen in effluent from a septic system, but the coupling of the nitrification/denitrification processes by a recirculating filter also can improve conditions for nitrification.
The diatomite filter, as opposed to the rapid sand filter, can remove cysts of E.
The first thing technicians should know about a sand filter is that it has valves which command certain jobs.
Also, the Clear Water Sand Filter comes with a 7-Position Multi-Port Valve, the filter and pump mounting bases, and an additional accessory base for chlorinator and timer.
There are three common ways of purifying drinking water: Boiling; chemical disinfectants such as chlorine, iodine or household bleach; and filtration through a ceramic or sand filter.