SECTION 1 – GENERAL SPECIFICATION

1.1          SYSTEM OUTLINE

This specification covers the requirements for the design and supply of 1 m3 Sewage Treatment Plant.

The plant consists mainly of

  • Biofilter Tank system
  • Blower
  • Pump
  • Panel

The black and grey water from septic tank is pumped and fed to the biofilter system by submersible pump (automatic operation). In the Biofilter tank, black and grey water that contains BOD and COD is processed by bacteria and the BOD and COD level become lower and can fulfill the requirement of government.

Effluent that goes to the environment inject by oxidizing biocide to kill E- coli (pathogenic bacteria).

 

SECTION 2 – DESIGN BASIS

INFLUENT (SEPTIC) WATER QUALITY
NO PARAMETER UNIT RESULT
Physical
1 Temperature oC 31
2 TDS (Total  Dissolved Solid) mg/l 627
3 SS (Suspended Solid) mg/l 237
4 Colour Scale Pt.Co 1544
Chemical
5 pH 6,0-9,0
6 Iron mg/l 1,95
7  Manganese mg/l 0,747
8 Copper mg/l 0,21
9 Zinc mg/l 0
10 Hexachorome mg/l 0,158
11 Nickel mg/l 0,031
12 Sulfide mg/l 0,337
13 Fluoride mg/l 0,74
14 Chlorine Gas mg/l 0,21
15 Free Ammonia mg/l 0,034
16 Nitrate mg/l 10,4
17 Nitrite mg/l 0,028
18 COD cr mg/l 439
19 BOD 5 mg/l 221

 

 EFFLUENT WATER QUALITY
PARAMETER UNIT COMMON
PRACTISE
BOD mg/L 300
COD mg/L 500

 

 

SECTION 3 – EQUIPMENT SPECIFICATION

3.1  SUBMERSIBLE PUMP

Quantity                                            1 set (1 duty, 0 standby)
Make                                                 Showfou ss 232 N
Flowrate                                            0.6 m3/min
Motor                                                1.5 kW, 380V/3ph/50Hz
Operation                                          Automatic

  

3.2  GROUND TANK

Quantity                                            1 set
Capacity                                           1 m3
Material                                            Concrete
Tank Size                                          1000x1000x1500 mm

 

3.3  EQUALIZATION TANK

Quantity                                            1 set
Capacity                                           3 m3
Material                                            Concrete
Tank Size                                          1000x1000x1500 mm

 

3.4  AERATION TANK

Quantity                                            1 set
Capacity                                           6 m3
Material                                            Concrete
Tank Size                                          2000x1000x1500 mm

 

3.5  PRIMARY CLARIFIER TANK

Quantity                                            1 set
Capacity                                           4.5 m3
Material                                            Concrete
Tank Size                                          2000x1500x1500 mm

 

3.6  SECONDARY CLARIFIER TANK

Quantity                                            1 set
Capacity                                           4.5 m3
Material                                            Concrete
Tank Size                                          2000x1500x1500 mm

 

3.7  SAND FILTER

Quantity                                            1 set
Material                                            FRP Pentair
Tank Size                                          ø13”x54”

 

3.8   SAND FILTER PUMP

Quantity                                            1 set
Make                                                 Grundfos
Flowrate                                            1 m3/h
Motor                                                0.46 kW, 380V/3ph/50Hz

 

3.9  CHEMICAL DOSING UNIT

Quantity                                           3 sets
Chemical                                          PAC
Polymer
Caustic Soda

 

DOSING TANK (Per set)
Quantity                                           1 no
Type                                                 Vertical, cylindrical
Capacity                                           150 litres
Material                                            PE-Profil Tank

 

DOSING PUMP (Per set)
Quantity                                           1 no
Type                                                 Solenoid drive diaphragm, manual adjustment
Make                                                grundfos or equal
Flowrate                                           5 l/h (max)
Head                                                60 m
Material                                            PP

 

3.10  pH ADJUSMENT TANK

Quantity                                            1 set
Material                                            Concrete
Tank Size                                          1000 x 1000 x 1500 mm

 

3.11  PIPING AND VALVE

Quantity                                           1 lot
Material                                            PVC Wavin
Carbon Steel
Main Size                                         2”

 

3.12   CONTROL PANEL

Quantity                                               1 no
Type                                                    Outdoor
Access                                                 Front
Material                                               Mild steel with oven baked epoxy finish
Supply voltage                                     220V/50Hz/1ph/2 wire

The control panel shall comprise of  following

  • One (1) no main circuit breaker with indicating light
  • One (1) lot motor starter, each consist of isolating switch, contactor, thermal overload relay, selector switch, and indicating lamps