filter bed


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Words related to filter bed

filter consisting of a layer of sand or gravel for filtering water

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Poorly performed backwash reduces filter bed porosity because it does not fully remove the obstruction of pores by already adhered particles, causing increase in the pressure differential of the device and reduction of removal efficiency in the subsequent filtration process (Staden & Haarhoff, 2011).
To evaluate backwash performance, it was necessary to dirty the filter bed of the analyzed filters (F1, F2 and F3) by applying four filtration rates (TF20-20 [m.sup.3] [m.sup.-2] [h.sup.-1], TF40-40 [m.sup.3] [m.sup.-2] [h.sup.-1], TF60-60 [m.sup.3] [m.sup.-2] [h.sup.-1] and TF75-75 [m.sup.3] [m.sup.-2] [h.sup.-1]) in three silica sand granulometries (G1, G2 and G3), with a 4-h filtration in each experimental combination.
The tree planting, reed planting for the filter bed system and the measures to improve the local habitat will also be completed by the end of this month.
Name of project: labour charges for laying of 150 mm di agi pipe line from air shaft to sk filter bed ,at bpa
Name of project: replacement of damaged sluice valves at deshaipet filter bed
Tender notice number : 1249/JKV/RENOVATION OF FILTER BED
Tenders are invited for procurement of anthracite filter media for pre-treatment plant gravity filter beds of stage-iv
High raw water turbidity (greater than 10 ntu - nephelometric turbidity unit) will create problems for rapid-sand filters as well, by frequently clogging the filter beds and producing turbid water, if filter beds are not frequently cleaned and they never will, considering the attitude of Hyderabad's civic authorities.
Consists of two filter beds of carbon molecular sieve.
The city's engineering department planned to install a networked automation system to operate the valves that send 26 million gallons of water per day into the plant's filter beds. Engineers decided to use an Allen-Bradley PLC-5, containing a ProSoft 3100-LTQ interface module, to preside over a Limitorque DDC-100 redundant loop network.
Tenders are invited for Providing 600mm raw water controlling butterfly valve, Raw water by pass channel arranging filter media in filter beds at 12 mld wtp at siddardhanagar in ward no.
Tenders are invited for Manning and operations of filter beds for a period of one (1) year under af beds section, sub-division no.ii,o&m division no.xvii, bhojagutta
Tenders are invited for Repairs and servicing of model valves of filter beds inlet & outlet of various sizes of all the filter beds and repairs and servicing settling valves and de-sludge valves of settling tanks at mir-alam filter beds retification of strucked valves on 750mm dia ci sluice valve (2 nos) repairing and replacement of damaged spare parts and complete overhauling of sluice valves at 13 ml glsr outlet ( compartment i&ii) at mir-alam filter beds section, sub-division no.i, o&m division no.xvii, bhojagutta
Tenders are invited for Supply of graded sand (size: 0.5mm to 1mm) for gravity filter beds at pre-treatment plant/stg-iv
Tenders are invited for Repairs and servicing of model valves of filter beds inlet & outlet of various sizes of all the filter beds and repairs and servicing settling valves and desludge valves of settling tanks at mir-alam filter beds retification of strucked valves on 750mm dia ci sluice valve (2 nos) repairing and replacement of damaged spare parts and complete overhauling of sluice valves at 13 ml glsr outlet ( compartment i&ii) at mir-alam filter beds section, sub-division no.i, o&m division no.xvii, bhojagutta