SECTION 1 – GENERAL SPECIFICATION

1.1  SYSTEM OUTLINE

This specification covers the requirements for the design and supply, necessary modification to increase capacity of the exisiting WWTP (WT2#) from 50 m3/h to 60 m3/hr located in Astra Daihatsu Motor Plant in Sunter Jakarta.

The plant consists mainly of

  • Waste holding tank
  • Chemical treament
  • Biological treatment
  • Sludge disposal
  • Polishing filter

Assumption Taken:

Raw waste water from Booth, and other process are considered not vary in quantity.  Only waste water from Washing and ED are considered to increase by 10 m3/hour :

No Process Functional considerations
1 Waste holding system As other process waste water except for Washing and ED are not considered to change no additional pumps are added for the increase in volume.  However for Booth Process, 2 additional submersible pumps are added to provide for reliable transfer system. Washing & ED tank – 2 submersibles pump added with capacity of 20 m3/h and new line of DN 65.
2 Chemical Treatment To remove most suspended solids contain in the waste water, pH adjust, coagulation and flocculation process tank are still used.  The existing agitators shall be replaced to introduce better mixing  and better floc formation and to cope with the increase capacity. Interconnecting piping shall be added new connecting piping. Before the DAF tank , a new pre-settler/extended floculation tank (8 m3) is added to remove large and heavy flocs that is allready formed. DAF system – Recycle pump shall be replace with special fine bubble making pump.  A false bottom floor made of perforated plate shall be added in the DAF tank.
3 Biological Treatment The exisiting volume of aeration tank should be enough to cover the increase capacity.  More oxygen should be introduce by adding 2 new more blowers.  The recycle sludge rate is further increase by air lift system.  More concentration of activated sludge is maintain. To assists in separation in clarifier , lamella shall be installed (also to cope with increased flow rate)
4 Sludge Disposal More sludge are expected to be handled because of increase flow rate and higher bio –sludge production. A new Filter Press shall be installed.
5 Polishing Filter After clarifier , 20 m3/hour filtration (feed pumps, sand filter and carbon filter) system shall be  added.

The existing sand filter shall be upgrade and rehabilitate by replacing the sand (sand  and activaved carbon filter)

 

 

 

SECTION 2 – DESIGN BASIS

FEED WATER CONDITION
Flow                                                 60 m3/h
Source                                              From Washing and ED tank
FEED WATER QUALITY

PARAMETER UNIT

 

Raw waste
SS mg/L Solid 500
BOD < 600
COD < 1000

Assumed parameter based on similar WT1#  data

 

2.3  TREATED WATER CHARACTERISTICS
Flow                                                 60 m3/h
BOD                                                < 50 ppm
COD                                                 < 120 ppm

 

SECTION 3 – EQUIPMENT SPECIFICATION

3.1  BOOTH PUMP (NEW)
Quantity                                           1 set (1 duty, 0 stand by)
Type                                                 Non –clogging submersible
Make                                                EBARA or equivalentl
Flowrate                                           4 m³/hr
Discharge head                                10 m
Motor                                               0.75 kW/ 3 Phase/ 50 Hz

 

3.2  WED PUMP (NEW)
Quantity                                           1 set (1 duty, 0 stand by)
Make                                                EBARA or equivalentl
Type                                                 Non –clogging submersible
Flowrate                                           60 m³/hr
Discharge head                                15 m
Motor                                               5.5 kW/ 3 Phase/ 50 Hz

 

3.3  PROCESS TANK DOSING PUMP (NEW)
Quantity                                           3 units
Type                                                 Diaphragm Pump
Make                                                Milton Roy, USA
Capacity                                           50 ltr/h
Pressure                                            10 bar (Max)

 

3.4  PROCESS TANK AGITATOR (NEW)

pH Adjusting tank agitator
Quantity                                           1 unit
Type                                                 Turbine
Material of construction
– Impeller                                         Stainless steel
– Base Plate                                     Carbon steel
Gear Reducer Motor                     0.55 kW/3ph/50Hz/380 V
 

Coagulation tank agitator
Quantity                                           1 unit
Type                                                 Turbine
Material of construction
– Impeller                                         Stainless steel
– Base Plate                                     Carbon steel
Gear Reducer Motor                      0.55 kW/3ph/50Hz/380 V
Floculation tank agitator
Quantity                                           1 unit
Type                                                 Paddle
Material of construction
– Impeller                                         Stainless steel
– Base Plate                                     Carbon steel
Gear Reducer Motor                      0.55 kW/3ph/50Hz/380 V

 

3.5  PROCESS TANKS (EXISTING)
The existing process has sufficient contact tank.  To add new piping connection for the additional capacity.

 

3.6  PRE-SETTLER/EXTENDED FLOCULATOR TANK (NEW)

Tank
Quantity                                           1 set
Type                                                 Vertical, Rectangular
Capacity                                           8000 litres
Material                                            Stainless Steel grade 304
Sludge Valves
Quantity                                           2 units
Type                                                 Butterfly valves, Stainless steel disc
Size                                                  DN 80
Actuator                                           Pneumatic Actuator NC

 

3.7  DAF SYSTEM (NEW)
Quantity                                           1 set
Type                                                 Vertical, Rectangular
Flowrate                                           15 m3/h
Material                                            SS 304

DAF RECYCLE PUMP (NEW)
Quantity                                           3 sets (2 duty, 1 stand by)
Type                                                 Regenerative turbine pump
Make                                                NIKUNI japan
Flowrate                                           5 m³/hr
Discharge head                                30 m
Motor                                               3.7 kW/3 Phase/50 Hz

 

3.8  AERATION TANK (EXISTING)
Quantity                                           1 Unit
Type                                                 Concrete, Rectangular

ACTIVATED SLUDGE RECYCLE SYSTEM (NEW)
Quantity                                           1 set
Type                                                 Airlift
Capacity                                           30 m3/hr
Material                                            PVC/Galvanized pipe

ROOT BLOWER (NEW)
Quantity                                           2 sets (1 duty, 1 standby)
Brand                                               Longtech or equal
Capacity                                           2 m3/min
Head                                                6000 mmAq
Motor                                               5.5 kW/ 3 phase/ 50 Hz

MEMBRANE BIO REACTOR (MBR, NEW)
Quantity                                           1 set
Capacity                                           30 m3/hr
Manufactured                                  GE
 

3.9  CLARIFIER TANK (Existing)
Quantity                                           1 Unit
Type                                                 Concrete, Rectangular
LAMELA  (NEW)
Quantity                                           to cover area diameter 9 m
Type                                                 honeycomb
Material                                            PVC/P

 

3.10 SLUDGE TANK (Existing)
Quantity                                           1 Unit
Type                                                 Concrete, Rectangular

SLUDGE TRANSFER PUMP (NEW)
Quantity                                           1 set
Type                                                 Peristaltic Pump
Capacity                                           8 m3
Head                                                10 mtr

SLUDGE THICKENER TANK (NEW)
Quantity                                           1 set
Type                                                 Vertical cylindrical
Capacity                                           10 m3
Material                                            Steel-FRP line

FILTER PRESS (NEW)
Quantity                                           1 set
Type                                                 Manual Pneumatic  (Semi auto)
Capacity                                           555 l/hr
Material                                            PP-Carbon Steel
Filter Press Pump                          Wilden Pump, 3”

 

3.11  POLISHING FILTER (EXISTING)

SAND FILTER
Quantity                                           1 set
Type                                                 Vertical, Cylindrical
Capacity                                           60 m3/hour
Material                                            Carbon steel / FRP /epoxy lined
Propose Modification                    Change Media Filter

ACTIVATED CARBON FILTER
Quantity                                           1 set
Type                                                  Vertical, Cylindrical
Capacity                                           60 m3/hour
Material                                            Carbon steel / FRP /epoxy lined
Propose Modification                    Change Media Filter
 

3.12  PIPING AND VALVE
Quantity                                           1 lot
Material  1                                         PVC Rucika (Concrete tank interconnection) & Galvanize (steel tank interconnetion)
Main Size                                         4”

 

3.13  CONTROL PANEL (NEW)
Quantity                                              1 no
Type                                                    Indoor
Access                                                 Front
Material                                               Mild steel with oven baked epoxy finish
Supply voltage                                    380V/50Hz/3ph/4 wire
PLC                                                     Omron or Mitsubishi
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.