SYSTEM OUTLINE

This specification covers the requirements for the design and supply of 50 m3/h reverse osmosis for PT. Surya Cipta Perkasa.

The plant consists mainly of

  • Multimedia Filter
  • Activated Carbon Filter
  • Reverse osmosis system complete with cleaning facilities
  • Storage Water Tanks

Feed water from the river flow trough the multimedia filter and activated carbon filter and then the water is injected with chemical treatment as follow :

No Chemical Function
1 NaOH To adjust the pH
2 Hypochlorite To kill microorganism and hence protect the RO membrane from biological fouling, also act to oxidize solube iron to protect RO membrane from iron fouling.
3 Bisulfite To act as an chlorine scavenger that will remove any oxidants in the water, to protect RO membranes against any attack by the oxidants
4 Anti Scalant To hinder salt crystallization in RO concentrate stream and thus prevent scaling on RO membrane

 

The conditioning water is boosted and fed to the reverse osmosis modules. Under high pressure, the water is forced through the RO membranes. Salts are not permeable and are thus retained on the membrane surface. As such, the water is separated into two streams. One stream will be the water passing through the RO membranes, this stream contains small amount of salts and is termed as the permeate (or product water). The other stream contains the salts and is termed as the concentrate (or reject water)

RO cleaning unit is incorporated in the package. Even though the pretreatment is well designed and incorporated, the RO membrane is still subject to fouling and scaling.

 

FEED WATER CONDITION

Flow                                                 100 m3/h

Source                                              River

 

FEED WATER QUALITY

PARAMETER UNIT RESULT
Treated Water
TDS mg/L Solid 270
SDI < 3
pH 7.06

 

PERMEATE WATER CHARACTERISTICS

Flow                                                 50 m3/h

 

PERMEATE WATER QUALITY

TDS        mg/L Solid                                       Max 15

 

A. PRETREATMENT EQUIPMENT

RO BOOSTER/FEED PUMP

Quantity                                          2 sets (1 duty, 1 stand by)
Complete with                                Pipes, Fittings, and Valves
Type                                                 Horizontal end suction
Make                                                Grundfos or equal
Flowrate                                          100 m³/hr
Discharge head                              20 m
Motor                                               11 kW, 380V/3ph/50Hz

 

AIR BLOWER

Quantity                                          1 set
Complete with                                Pipes, Fittings, and Valves
Make                                                Showfou or equal
Capacity                                           100 cfm@ 0.3 bar

 

MULTIMEDIA FILTER

Quantity                                           1 set (1 duty, 0 stand by)
Complete with                                 Front Pipes. Fittings, and Valves
Operation                                         Manual
Vessel                                               2400 mm dia x 2500 mm H
Material                                            Mild steel with epoxy painting
Media type                                       Anthracite, Silica Sand
Volume Media                                 6000 liters

 

ACTIVATED CARBON FILTER

Quantity                                           2 set (1 duty, 1 stand by)
Complete with                                 Front Pipes, Fittings, and Valves
Operation                                         Manual
Vessel                                               2400 mm dia x 1850 mm H
Material                                            Mild steel with epoxy painting
Media type                                       Activated Carbon
Volume Media                                 9000 liters

 

FILTER BACKWASH DISCHARGE TRANSFER PUMP

Quantity                                           1 set
Complete with                                 Pipes, Fittings, and Valves
Type                                                  Horizontal end suction
Make                                                Grundfos or equal
Flowrate                                           80 m³/hr
Discharge head                                20 m
Motor                                               7.5 kW, 380V/3ph/50Hz

 

B. RO SYSTEM

REVERSE OSMOSIS UNIT

PRE FILTER/CARTRIDGE FILTER

Quantity                                           1 set
Type                                                  Cartridge 5 micron
Service flowrate                              72 m³/hr
Material of construction
– Housing                                         Stainless steel (SS 316)
– Cartridge                                       5 micron nominal x 40” Length
Cartridge quantity                         18 pcs

 

HIGH PRESSURE PUMP

Quantity                                           1 set (1 duty, 0 standby)
Type                                                  Centrifugal multistage
Make                                                 Grundfos CRN 64-5 or equal
Flowrate                                           72 m³/hr
Discharge head                               100 m
Material                                            Stainless Steel
Motor                                                30 kW, 380V/3ph/50Hz

 

REVERSE OSMOSIS MODULE

Quantity                                           1 set
Configuration                                  2 stage
Array                                                 6 : 3
Recovery                                          75%
Permeate                                          50 m³/hr
Housing                                            FRP
Make                                                 Codeline
Pressure rating                               300 psi
Housing quantity                           9 pcs
Membrane quantity                       54 pcs
Membrane specification
Make                                                 Dow Filmtec BW30-400
Size                                                    8” x 40”
Type                                                  Polyamide Thin-Film Composite
Accessories                                      – Rota meter x 2 nos
– Pressure gauge x 5 nos
– Pressure switch x 2 nos
– Conductivity meter  x 2 no
– Valves x 1 lot

 

CLEANING IN PLACE (CIP)

Tank
Quantity                                           1 set
Type                                                  Vertical, cylindrical
Capacity                                           3 m3
Material                                            PE-Profil Tank

 

Pump
Quantity                                           1 set
Type                                                 Centrifugal multistage
Make                                                Grundfos CRN 45-2 or equal
Flowrate                                           50 m3/h
Head                                                 30 m
Material                                           Stainless Steel
Motor                                               7.5 kW, 380V/3ph/50Hz

 

CHEMICAL DOSING UNIT
Quantity                                           2 sets
Chemical                                          Bisulfite
Anti Scalant

 

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, Prominent, or Milton Roy
Flowrate                                           0.7 Ltr/h
Pressure                                            16 bar
Material                                            PP

 

PIPING AND VALVE
Quantity                                           1 lot
Material                                            PVC Rucika (Low Pressure)
Stainless Steel SS 304 (High Pressure)
Main Size                                         4”

RO PERMEATE/PRODUCT TANK

Quantity                                           1 set
Complete with                                 Pipes, Fitting, Valves and Acessories
Capacity                                           15 m3 x 2
Vessel                                               2900 mm dia x 2423 mm H
Material                                            HDPE

 

RO PERMAETE/PRODUCT WATER PUMP

Quantity                                           2 sets (1 duty, 1 stand by)
Complete with                                 Pipes, Fitting, Valves and Acessories
Type                                                 Horizontal end suction
Make                                                Grundfos 45-2-2 or equal
Flowrate                                           50 m³/hr
Discharge head                                24 m
Motor                                               5.5 kW, 380V/3ph/50Hz

 

HDPE PIPE PRODUCT WATER DELIVERY to BOILER FEED TANK

Quantity                                           1 lot
Complete with                                 Fittings, Valves, Support
Length                                              100 meters
Size                                                  110 mm OD
Material                                            HDPE

 

RO CONCENTRATE STORAGE TANK

Quantity                                           1 set
Capacity                                           60 m3
Vessel                                               Tank with Coated, Support Structure, Platform
Tower Height                                   12681 mm
Material                                            Carbon Steel

 

C. INTERCONNECTING PIPE

Quantity                                           1 lot
Complete with                                 Pipeworks, Fittings, Valves, Support
Material                                            PVC Rucika Class 7
Galvanized Iron B
  

D. CONTROL PANEL AND ELECTRICAL WIRING

Quantity                                              1 no
Type                                                    Indoor
Access                                                 Front
Material                                              Mild steel with oven baked epoxy finish
Supply voltage                                   380V/50Hz/3ph/4 wire
PLC                                                      Merlin Gerlin

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