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Private Sewage TreatmentandPoints of DisposalSeptic TankSeepage PitSanitary Drain Field/Leaching FieldAnaerobic Baffled ReactorSoak PitDanilo V. Ravina NAMPAP-CEBU CHAPTER
SYSTEM DESIGNS….Danilo V. Ravina NAMPAP-CEBU CHAPTER
CONVENTIONAL PLUMBING SYSTEMDanilo V. Ravina NAMPAP-CEBU CHAPTER
SYSTEM COMPONENTS…Danilo V. Ravina NAMPAP-CEBU CHAPTER
SEPTIC TANK: PRIMARY TREATMENTPOINTS OF DISPOSAL: SEEPAGE PIT and DISPOSAL FIELDAS PROVIDED FOR IN THE 1999 REVISED NATIONAL PLUMBING CODE OF THE PHILIPPINESDanilo V. Ravina NAMPAP-CEBU CHAPTER
Septic Tank:Private Sewage Treatment SystemMost urban and suburban areas in our country do not have Public Sewage Treatment Plants. It is therefore necessary the sanitary wastes in every building be processed and neutralized by means of a Private Sewage Treatment System and Disposal Unit.The General Scheme of a Private Treatment System is relatively simple, as enumerated below:1.The sewage is retained in a submerged, tightly enclosed tank;2.Solid wastes, known as sludge, are diverted to the bottom of the tank;3.The action of bacteria present in the tank breaks up the solids and aids in purifying the fluids;4.An amount of sludge builds up at the bottom of the tank while other organic matters, known as scum, floats to the surface.5.An outlet pipe is provided so that the partially purified effluent (the liquid content of the sewage) will be disposed to a proper point of disposal.The septic tank is the primary purification unit and should be installed close to the surface of the soil, because correction of the effluent depends on oxidation and the presence of aerobic bacteria that is usually found not more than 1500mm below the surfaceDanilo V. Ravina NAMPAP-CEBU CHAPTER
Septic Tank –A watertight receptacle which receives the discharge of a sanitary plumbing system, designed and constructed to retain solids, digest organic matter through a period of detention and to allow the liquid to discharge into the public sewer or an approved private sewage disposal system.SITING OF SEPTIC TANK(Minimum Horizontal Distance)From building or structure: 1.50 metersProperty line adjoining Private property:1.50 metersWater supply Wells: 15.20 metersStreams: 15.20 metersTrees:3.00 metersSeepage pits orCesspools;1.50 metersDisposal Fields; 1.50 metersOn site Domestic WaterService line:1.50 metersPressure Public Water Main:3.00 metersDanilo V. Ravina NAMPAP-CEBU CHAPTER
Septic Tank: Design and Construction ConsiderationsSeptic Tank .A water tight receptacle which receives the discharge of a sanitary plumbing system or part thereof, designed and constructed to retain solids, digest organic matter through a period of detention and to allow the liquids to discharge into the soil outside of the tank through a system of open-jointed sub-surface pipings or a seepage pit meeting the requirements of the National Plumbing Code.
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Sewage treatment, Septic tank, DANILO V. RAVINA, Ravina NAMPAP-CEBU CHAPTER