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Chapter IV
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| SPISF |
Design Concept
From the Toilet chamber,
the waste is collected in a Sump and pumped into a SepticTank, where the
solidwaste is separate from the black and graywater.
The Black and gray water is filtered by pumping under low pressure ( to ensure even distribution), through a vertical graded gravel filter . The typical sand filter is a concrete or PVC-lined box filled with a specific sand material. A network of smalldiameter pipes is placed in a gravelfilled bed on top of the sand. The water is circulated about 6 or 7 times by pumping.Themedia grains of the sand filter provide a large surface area formany different organisms to live on, which results in a stable process.
The effluent leaves the pipes, trickles downward through the gravel, and is treated as it filters through the sand. A gravel under-drain collects and moves the treated wastewater to discharge (pumped or gravity). The accumulation of solids must be removed periodically.
The technology designer by TWAD board [TAMILNADU WATER SUPPLY AND
DRAINAGE BOARD] Chennai requires high energy, skilled labour and has
high recurrent costs.
SPISF has been implemented in Samanthanpettai, Nagapattinam [Case Study in CED film 'What Song Shall I SingToday?] and in Devanampattinam in Cuddalore
From the Toilet chamber,
the waste is collected in a Sump and pumped into a SepticTank, where the
solidwaste is separate from the black and graywater.
The Black and gray water is filtered by pumping under low pressure ( to ensure even distribution), through a vertical graded gravel filter . The typical sand filter is a concrete or PVC-lined box filled with a specific sand material. A network of smalldiameter pipes is placed in a gravelfilled bed on top of the sand. The water is circulated about 6 or 7 times by pumping.Themedia grains of the sand filter provide a large surface area formany different organisms to live on, which results in a stable process.
The effluent leaves the pipes, trickles downward through the gravel, and is treated as it filters through the sand. A gravel under-drain collects and moves the treated wastewater to discharge (pumped or gravity). The accumulation of solids must be removed periodically.
The technology designer by TWAD board [TAMILNADU WATER SUPPLY AND
DRAINAGE BOARD] Chennai requires high energy, skilled labour and has
high recurrent costs.
SPISF has been implemented in Samanthanpettai, Nagapattinam [Case Study in CED film 'What Song Shall I SingToday?] and in Devanampattinam in Cuddalore
| Sewage Treatment Methods byTWAD Board [R.D70d.626] |
Single Pass Sand Filter Component Manual For Private Onsite
Wastewater Treatment Systems, State Of Wisconsin Department Of
CommerceDivisionOf SafetyAnd Buildings, June 25, 1999.
http://commerce.wi.gov/SBdocs/SB-PowtsManualSinglePass.pdf [C.eldoc1/d70d/undp1_990625zzz4B.pdf] |
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