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PLANT
AND SECTION VIEW OF RESINTECH SEPTIC TANK
(MODEL - RST5)
NB: Septic Tank Outlet Discharge Pipe to Manhole
Shall Be According to Local Authority Approval
NB : For Cases of Shallow Type of Drain Using
of Pump Sump Required
SECTION A - A
PLAN [SEPTIC TANK RST
5]
| (Lulus
Olih Jpp Pada 06/11/1998) |
| Design Parameters |
RST 5 |
| Separation Chamber Volume
[Litres] |
5,083 |
| Filteration Chamber Volume [Litres] |
950 |
| Height [MM] |
1,900 |
| Width Diameter [MM] |
1,840 |
| Length [M] |
2,550 |
| Weight [KG] |
268 |
| Thickness [MM] |
8-10 |
| Inlet & Outlet Pipe Diameter [MM] |
150 |
| Ventilation Pipe Diameter
[MM] |
25 |
| Hydraulic Retention Time [[HR.] |
28 |
| Filter Volume [Litres] |
215 |
| Hydraulic Loading M3/M2/D |
1.85 |
| Organic Loading Kg.Bod/D |
0.25 |
| Daily Load Kg.Bod/D |
1.4 |
| Filter Media |
PVC Rings |
| Filter Surface To Volume Ratio M2/M3 |
>50 |
| Population Equivalent |
22 |
Efficiency of Treatment
The RESINTECH Individual Septic Tanks Model RST
5 are designed to be used for Residential and Commercial Buildings with
a population equivalent of 22 people.
The Standard to satisfy is the Malaysia Environmental
Quality Regulation, 1979 Standard B.
STANDARD DESIGN CALCULATION
Design Data :
System : Resintech Individual Septic Tank Model RST 5
Type of Sewage : Residential / Commercial
Design Flow : 5.6m3/day
Population Equivalent : 22pc
EFFICIENCY OF SUSPENDED
SOLID REMOVAL
Resintech Individual Septic Tank Model RST 5 80% of the Suspended Solids
are considered to be removed in the sedimentation process.
Design Influent x (100 -80) %
300 mg/l x (100 - 80) %
= 60 mg/l.
EFFICIENCY OF BOD
REMOVAL
Resintech Individual Septic Tanks Model RST 5 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 5.6m3/d |
| 5.63m3/d |
|
=
|
0.25kg/m3.d. |
HYDRAULIC RETENTION TIME (HRT)
HRT = Chamber volume / design flow
= 5.63m3/5.6 m3/d
=1.01 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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