SYSTEM OUTLINE

This specification covers the requirements for the design and supply of recycle water plant.
The plant consists mainly of

  • Pre treatment system comprising of multi media filter, carbon filter, and chemical treatment
  • Reverse osmosis system complete with cleaning facilities

After the effluent water tank (existing), multi media filter, and carbon filter, the water is injected the following chemicals :

Sodium Hypo            : To kill microorganism that can create fouling in the RO membrane
Metabisulfite             : To remove Cl2 residual that can make RO membrane damage
Antiscalant                : 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.

The two pass RO is designed to meet the product water quality requirement. Each RO vessel consists of 5 membranes with 5:3 configuration and contain total 40 membranes.

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. The fouling/scaling on membrane surface manifests itself in the decline of RO performance, that is, lower permeate flow and/or higher salt passage

 

FEED WATER CONDITION

Flow                                                1 x 50 m³/h
Pressure                                         3 kg/cm2 minimum

 

FEED WATER QUALITY

 

TREATED WATER CHARACTERISTICS

Flow                                                1 x  30 m³/h

TREATED WATER QUALITY

Conductivity                                       < 300 micro S

 

EQUIPMENT SPECIFICATION

1. FEED PUMP

Quantity                                          1 sets
Type                                                Horizontal end suction
Make                                               Grundfos CR64-2-2
Flowrate                                          50 m³/hr
Discharge head                             30 m
Motor                                               7.5 kW, 380V/3ph/50Hz

 

2. AMIAD FILTER

Quantity                                          1 sets
Service flowrate                            65 m3/h
Max Flow                                        200 mikrom

 

3. MULTI MEDIA FILTER

Quantity                                          1 sets
Service flowrate                            50 m3/h
Vessel                                             2100 dia x 2600 H
Material                                           Carbon steel with epoxy inside
Media type                                      Sand, Antracite
Media quantity                               7000 kg
Accessories                                   – Butterfly valve 4” x 6 nos each
– Pressure gauge x 2 nos each
– BFV 2” x 1 nos
Operation                                       Full automatic

 

4. ACTIVATED CARBON FILTER

Quantity                                          1 sets
Service flowrate                            50 m3/h
Vessel                                             2100 dia x 2200 H
Material                                           Carbon steel with epoxy inside
Media type                                      Carbon Active
Media quantity                               4200 liter
Accessories                                   – Butterfly valve 4” x 6 nos each
– Pressure gauge x 2 nos each
– BFV 2” x 1 nos
   Operation                                       Full automatic
 

5. REVERSE OSMOSIS MODULE

PRE FILTER
Quantity                                          1 set
Type                                                Vertical housing , Cartridge 5 micron
Service flowrate                            50 m³/hr
Material of construction               SS304 Housing
Cartridge                                         5 micron nominal

 

HIGH PRESSURE PUMP
Quantity                                          1 set
Type                                                Horizontal end suction
Make                                               Grundfos CRN 64-5
Flowrate                                          50 m³/hr
Discharge head                             120 m
Motor                                               30 kW, 380V/3ph/50Hz

 

REVERSE OSMOSIS MODULE

Quantity                                          1 set
Recovery                                        60%
Permeate                                        30 m³/hr
Array configuration                       5 : 3
Housing                                          FRP
Housing make                               Codeline or equal
Pressure rating                              300 psi
Housing quantity                           40 pcs of 8” housing
Membrane quantity                       5 membranes each vessel, 40 membranes total
Membrane specification
Make                                             Filmtec BW30-400
Size                                               8” x 40”
Type                                               Spiral wound
Permeate flow                              30 m3/hr
Salt Rejection                               99.6% minimum
Maximum applied pressure       600 psig (4.16 Mpa)
Maximum chlorine concentration         < 0.1 ppm
Maximum operating temperature          45oC
Maximum feed water turbidity   1 NTU
Maximum feed water SDI           3
Feed water pH range                  3 – 10
Accessories                                   – Flowmeter  x 2

– Pressure gauge x 2 (WIKA)
– Pressure switch x 1 (Saginomiya)
– Conductivity meter x 2 (Purotec)
– Valves x 1 lot (SS)
– Panel x 1 set (PLC OMRON)

 

6. RO CHEMICAL DOSING UNIT

Quantity                                          3 set
Chemical                                        Antiscalant, NaOCl, and Sodium
metabisulfit
Each set consist of :
DOSING TANK
Quantity                                          1 no
Type                                                Vertical, cylindrical
Capacity                                         100  litres
Material                                           PE

 

DOSING PUMP
Quantity                                          1 no
Type                                                Solenoid drive diaphragm, manual adjustment
Make                                               Grundfos / Prominent
Flowrate                                          6 l/h (max)
Head                                               60 m
Material                                           PP

  

3.7    RO CLEANING UNIT

Pump
Quantity                                          1 sets
Type                                                Horizontal end suction
Make                                               Estampinox/Grundfos
Flowrate                                          30 m³/hr
Head                                               20 m
Tank                                                1 m3

 

3.8     PIPING AND VALVE RO UNIT

Quantity                                          1 lot
Material                                           PVC (Low Pressure)
Stainless Steel 306 (High Pressure)
Main Size                                       4”

 

3.9       CONTROL PANEL

Quantity                                             1
Type                                                   Indoor
Access                                               Front
Material                                              Mild steel with oven baked epoxy finish
Supply voltage                                  380V/50Hz/3ph/4 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