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.

sand filter

sand filter: plan
A bed of fine sand which is laid over graded gravel; used to remove impurities from a water supply.
References in periodicals archive ?
Other than sand filter, the turbidity is removed 73% in the combined filter, with 49% BOD removal efficiency, also with the removal efficiencies of 53% and 66% for total solids and total suspended solids.
2011) point out that the incorrect definition of intervals and durations of backwash processes in sand filters is the main cause of low performance in successive filtrations.
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.
High-rate sand filters may remove particles in the 8 to 10 micron range when operating at peak performance.
Initially, in an attempt to maximize fecal-coliform removal, the final sand filter used sand that had an effective size of 0.
Sand filters use one of two types of valves to accomplish this: a multivalve (which can be top or side mounted) and a side-mounted slide valve (sometimes known as a push-pull valve).
The GAC is installed in contactors that are arranged somewhat like rapid sand filters complete with underdrains for collecting the process flow and distributing the backwash flow, overflow troughs for backwash, and a controlled flow inlet.
In addition to the StormFilter, BPO approved practices include ponds, wetlands, swales, sand filters and rain gardens.
The ozone plant / construction project itself consists of: - factory building (31 x 15 m), - gas-tight contact basins (vkb = 850 m 3 ) with cascades (baffles) and built-in diffusers (aerators) or injectors, Ozone production (evaporator, Ozone generator, Cooling), - ozone residual killers, - measuring and control technology, - power supply, - pure oxygen tank (v ~ 50 m 3 ), - connection channels for connection to, - sand filter system, - secondary clarifier.
These systems, each of which consist of an aerated lagoon followed by an intermittent sand filter, were designed for flow rates of 0.
Tenders are invited for Supply Of Sand For Gyro Sand Filter Eligibility Criteria : The prospective bidders should have the following
One of the deciding factors in choosing the slow sand filter was the plant's hillside location.