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PLANT
AND SECTION VIEW OF RESINTECH SEPTIC TANK
(MODEL - RST2 and RST 3)
NB: Septic Tank Outlet Discharge Pipe to Manhole
Shall Be According to Local Authority Approval
NB : For Shallow Type of Drain Using of Pump
Sump Required
SECTION A - A
PLAN [SEPTIC TANK RST 2]
SECTION B-B
PLAN [SEPTIC TANK RST
3]
| (Lulus Olih
Jpp Pada 06/11/1998) |
| Design Parameters |
RST 2 |
RST 3 |
| Separation Chamber Volume [Litres] |
2,075 |
3,030 |
| Filteration Chamber Volume [Litres] |
185 |
360 |
| Height [MM] |
1,955 |
1,650 |
| Width Diameter [MM] |
1,560 |
1,620 |
| Length [M] |
|
2,000 |
| Weight [KG] |
85 |
130 |
| Thickness [MM] |
5.5 |
6.5 |
| Inlet & Outlet Pipe Diameter [MM] |
150 |
150 |
| Ventilation Pipe Diameter [MM] |
25 |
25 |
| Hydraulic Retention Time [[HR.] |
30 |
30 |
| Filter Volume [Litres] |
121 |
121 |
| Hydraulic Loading M3/M2/D |
1.44 |
0.87 |
| Organic Loading Kg.Bod/D |
0.25 |
0.25 |
| Daily Load Kg.Bod/D |
0.45 |
0.675 |
| Filter Media |
PVC Rings |
PVC Rings |
| Filter Surface To Volume Ratio M2/M3 |
>50 |
>50 |
| Population Equivalent |
6-8 |
9-12 |
Efficiency of Treatment
The RESINTECH Individual Septic Tanks Model RST2 and RST3 are
designed to be used for Residential and Commercial Buildings with a population equivalent
of 8 people and 12 people respectively.
The Standard to satisfy is the Malaysia Environmental Quality
Regulation, 1979 Standard B.
STANDARD DESIGN CALCULATION
Design Data :
System : Resintech Individual Septic Tank Model RST2
Type of Sewage : Residential / Commercial
Design Flow : 225 litres/pe/day
Total Flow : 2.7m3/day
Population Equivalent : 8 P.E.
Design Data :
System : Resintech Individual Septic Tank Model RST3
Type of Sewage : Residential / Commercial
Design Flow : 225 litres/pe/day
Total Flow : 2.7m3/day
Population Equivalent : 12P.E.
EFFICIENCY OF SUSPENDED SOLID
REMOVAL
Resintech Individual Septic Tank Model RST2 and RST3 80% of the Suspended Solids are
considered to be removed in the sedimentation process.
Design Influent x (100 -80) %
250 mg/l x (100 - 80) %
= 50 mg/l.
EFFICIENCY OF BOD REMOVAL
Resintech Individual Septic Tanks Model RST2 and RST3, 60% of the BOD are considered to be
removed in the Anaerobic System.
Design Influent x (100 - 60) %
250 mg/l x (100 - 60) %
= 100 mg/l.
Further in the Filteration Chamber, BOD is further reduced
with an efficiency of 75%.
Final BOD = 100 mg/l x (100 - 75) % =25 mg/l.
ORGANIC LOADING (OLR)
OLR |
Average BOD x Design Flow
(kg/m3.d) |
| Volume of Septic Tank |
= |
0.25 kg/m3 x 1.8m3/d |
| 1.8m3/d |
= |
0.25kg/m3.d. |
HYDRAULIC RETENTION TIME (HRT)
HRT = Chamber volume / Design flow
= 2.0m3/1.8m3/Day
=1.11 day > 24 hours (good for settling of organics)
SLUDGE GENERATION
The design sludge production rate = 0.04 m3/pe/yr. Assuming
the settled sludge can accommodate 40% of the chamber.
Estimated desludging period = |
Volume of sludge accumulated |
| Sludge produced |
= |
0.4 x 5.63m3 |
| 0.04 x 25m3/yr. |
= |
2.25years |
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