Sewerage System Proposal

Sewerage System Proposal1. Upflow sand filter

Using gravity technology of sand, the direction of flow of the rawwateris upwards through the filter bed. Backwashing is done by abrupt reversal of the flow direction. The effect of the filter depends on the type of the filter medium, the filtration rate, and possible preceding aeration or addition of a coagulant. For coarse organic and inorganic substances, the filter may act as a simple screen. Or else it may retain precipitated iron compounds.~At low filtration rates and sufficient oxygen content of the rawwater, biological activity can be observed.

advantagesCan be shared per 2 houseStainless steelPerformance duration longer lasting Is protected and hold by a carriage and safeStrong and can withstand high tidal wave

expensive cost (but sharing makes less)Required integral pipe created togetherneed to install carriage box extra construction renovations for pipes High maintenances

disadvantage

Raw water enters near the bottom of the tank by means of a stainless steel water distributor.Suspended solids are filtered out as the raw water flows up through the media bed.As the filtrate reaches the top of the filter, it passes over the effluent weir and is discharged. A portion of the filtrate is diverted through the sand washer and used for cleaning and transferring the waste solids.The Sand filter employs a backwash rinse that is performed continually while the tank is processing water.An air lift pump, located at the centre of the module, draws the media from the bottom of the filter up into the wash box. As the media is released into the wash box, it falls into the sand scrubber where the filtered solids are separated from the sand. From there, the filtrate carries the solids out as waste (backwash).The washed sand falls down onto the media bed for continued use.

PROCESSDue to the impact dense of stilts of the house, we purposed to install the air flown system at the edge or corner of each house instead of beneath the house.

LAYOUT

LAYOUT PURPOSEDSPECIFICATION OF SYSTEM DimensionsA - Filter Height: 64"B - Width: 30"C - Diameter: 20"D - Inlet: 35-1/4"E - Outlet: 12"Pipe Size: 3" FlangeDrain Size: 1-1/2" NPTFloor Space: 3.7 ft2Service Height: 98-1/2SUPPLIER : Harmsco Hurricane Filtration Systems (USA)

COSTING$9,022.61 DESCRIPTIONCOSTINGSYSTEM $9,022.61 PIPING (2S, 3S, 4S)10.000 m x 50 $/m= $500.000 CARRIAGE BOX$4000 x 9 = $36,000PER HOUSEHOLD SHARING (X2) Collection chambers:Vacuum station:$9,022.61 x9 = $81203.49130 CC x 2.000$=$260.000 = $200.000 TOTAL$ 586726.1 = MYR 2053,541.352. VACUUM SEPTIC TANKA septic tank is designed to provide what is known as primary treatment to crude wastewater produced in a normal domestic environment. It retains solids and allows them to settle out, where they can be partially broken down by biological action so that only the remaining liquor is left to flow down the outlet drain. This liquor (normally called effluent) is then sufficiently treated to soak into the ground in an underground soak away system.

SUPPLIER: Balmoral Tanks Direct ( UK)

TANK SPECIFICATIONS

Population served: 11-14Max hydraulic load (l/day): 2800Organic load (g BOD5/day): n/aNH3 (g/per day): n/aTotal capacity (litres): 4500Length (mm): 2165Width (mm): 2165Height (mm): 2770Energy usage (kWh/day): 0Inlet invert (mm): 770Outlet invert (mm): 890Pipework fitting (mm): 110Lid size (mm): 760Desludging interval: 12 monthsEmpty plant weight (kg): 275Accreditation: CE (BSEN 12566-1)

ADVANTAGESEasy to installImpact resistant body moulded in one-piece polyethyleneWide base and lifting eyesAdjustable invert depthFully sized, two stage separation treatment chambersIntegral venting pipe-workWide range to suit population requirements

DISADVANTAGESNeed to apply extra construction for setting up the basement (concrete backfill and slab)ExpensiveLess resistance to vibrationRequired precaution step and method with proper procedure and handling by engineering technique skill

HOW TO INSTALL IN WET LAND?

LAYOUT

A site is defined as being wet when ground water rises above the base of the tank. At no time shouldwater table/ground water conditions result in water levels above the base of the turret of the tank. Excavation should allow for a minimum of 200mm space all round the tank and 150mm below the tank. Where difficult ground conditions are encountered, ie in unstable ground or shrinking clay etc, it will also be necessary to allow for an additional depth (as much as deemed necessary by the supervising) engineer) to be excavated below the tank to allowfor hardcore and sand blinding to provide a firm base for the concrete bed.In poor soil conditions it is essential to make substantial provision for planking and strutting and temporary shuttering and to provide for adequatepumps to keep the excavation free from ground water at all times during the course of the work.

LAYOUT PURPOSEDCOSTINGDESCRIPTION COSTINGExcavation works34590 x 5 = 172,9508" Gravity Sewer Pipe (8-10 feet deep) 10.000 m x 100 /m= 1.000,000 Manholes:200 x 300 =60.000 SYSTEM TANK1,637.50 x 5 = 8187.5

Pump station:

4 x 50.000 =2000.000 concrete basement/slab5 x 50.000 = 250.000TOTAL343387.5 = MYR 1,885197.375