Content :• Plant Operating Overview

1. Chlorination Plant2. Desalination Plant

a. Clarificationb. Filtrationc. RO Desalination

3. Demineralization Plant4. Waste Water Treatment Plant

• Plant OptimizingTanjung Jati B Unit 1&2

1. Chlorination Schematic Flow Diagram

SEAWATER INLET

PUMP

PUMP

SELF CLEANING STRAINER

MANUAL STRAINER

GENERATORTRAIN A

TR/RE

+ -

GENERATORTRAIN B

TR/REGAS RELEASE CYLINDER

+ -

GAS RELEASE CYLINDER

Desalination Plant Overview

a. Clarification

b. Filtration Section

c. Reverse Osmosis

RO Desalination Product as Feed Demineralization Plant

Cation Exchanger Anion Exchanger Mixed Bed

3. Demineralization Overview

4. Waste Water Treatment Overview

Waste Water Treatment

Chlorination Plant

Desalination Plant

Demineralization Plant

Waste Water Plant

PLANT OPTIMIZING1. Piping Connection From

Demineralization Plant To Waste Water Treatment (Implemented)

2. Sediment Pond For FGD Blow Down (Planned)

3. RO Membrane Replacement Plan (Planned)

PIPING CONNECTION FROM DEMINERALIZATION PLANT TO WASTE WATER TREATMENT

Regeneration Waste in Neutralizing Tank (DM Area)

- High pH ( 11-12 )- Direct Neutralizing by HCl until

pH 6-9- Discharge to The Sea Directly- Neutralize By Decrease pH- Environment Concern Only pH,

Because Chemical Used Only NaOH and HCl

Retention Basin Water (WWTP Area)

- Relatively Low pH at WWTP (pH 5-7)

- There is pH Neutralizing Equipment

- Accepted pH Range before discharging to The Sea 6-9

- Neutralize By Increase pH

SEA

Original Design Installing Pipeline Connection to WWTP Retention Basin

Action :

- About 1000 m Piping Connection was Implemented From Neutralizing Tank (DM Plant Area) to Retention Basin (WWTP Area)

- Pumps and Control Instrument are used existing at DM Plant

Pipeline Connection to WWTP Retention Basin Overview

Additional PipelineStarting Point

End PointPipeline Overview

BOLER TURBINE AREA

Progress

• IMPLEMENTED Agustus 2008

• Done Well !!!!

After Connection

Neutralizing Tank

(DM area)

HCl

The Sea

RETENTION BASIN (WWTP AREA)

NaOH

Current Condition

Regeneration Waste in Neutralizing Tank (DM Area)

- No pH Neutralizing Required Before discharging to WWTP

- Neutralized by Retention Basin Water

Waste Wa ter Treatment Plant Condition Retention Basin (WWTP Area)

- pH Increasing Assisted by New Waste Supply from DM Plant

- There is pH Neutralizing Equipment, but Decreasing of Operating Time

2. Sediment Pond for FGD Blow downat WWTP Area

Background• High TSS ( +10 % solid) Flue Gas Desulphurization

Blowdown to Retention Basin• Performance of WWTP is not for High Solid

Treatment• No Dredging Access for Retention Basin so, Heavy

Equipment Needed for Retention Basin Dredging Activity

• Operational of WWTP Cannot be Stopped for Long Time

DM Plant

Boiler Blow down

FGD Blow down

WWTP SYSTEM

RETENTION BASIN

Sludge FGD FGD SLUDGE

Current Condition

Planned Action

FGD Sediment Pond Required> Required Condition

– Sediment Pond consist of two Side ( A and B ) to Accommodate continuity of FGD Blowdown

– Must Be Easy Accessed By Wheel Loader, Wheel Loader In charged By Material Handling Operation

– Completed by Control System and Integrated with WWTP Operating Panel, and Operational In charged by WWTP Operator

– Will Reduce Issue for Environment, Because FGD Blow down Sludge is not Part Of Hazardous Waste

RETENTION BASIN WWTP SYSTEM

DM Plant

Boiler Blow down

FGD SEDIMENT POND

FGD Blow downPlanned Illustration

FGD Sediment Pond Technical Overview

PROGRESS

Will be Implemented ASAP!!!!

3. RO Membrane Replacement Plan

HISTORY• The existing RO Membrane is TOYOBO Product with series HB10255SI• Current condition has been in operation in average of more than 2 years without

Spare membrane replacement. (for RO B is almost 3 years / tactical time)• Manual book by Toyobo, it is advisable to replace 10-15% per year• Current RO membrane conditions, it is found defective product in the form of an

imperfect molding off "cap“ RO membrane cover.• The trend of increasing product conductivity, current average conditions is

above 300 us / cm. Estimated normal membrane operation life time that still "cover" reasonable make-Up Plant Feed is less than one year (estimation) if no RO membrane replacement.

Background of the RO membrane replacement

• Special order for existing RO Membrane [to have more competitive price]

• The warranty existing product is not valid

Technical ReviewComparison between Spiral Wound and Hollow Fiber

Spiral Wound Hollow Fiber

Technical Review

Some Problem Found : Demineralization Plant units 1 and feeds to make up: “conductivity <300us/cm” (TDS + 205 ppm)”

• RO Product as Feed Of Demineralization Plant Requirements

ITEM

TOYOBO TORAY METITO

Replacement of existing elements New trains New trains

PROCESS DESCRIPTION One Stage with Hollow FibreOne Stage with Spiral Wound

Two Stages with Spiral Wound

(existing membrane type) type type

Product Quality (Condutivity)

inlet 51 500 … 54600 uS/cm 51 500 … 54600 uS/cm 51 500 … 54600 uS/cm

outlet 1st stage < 250 uS/cm 350 max value at one stage 1st stage <750 uS/cm

outlet 2nd stage second Stage <30 uS/cm

Membrane manufacturer Toyobo Toray several manufacturers

AVAILABLE OPTION

Spiral Wound

Turbidity, NTU < 1.0 < 1.0

Silt Density Index, SDI < 3.0 < 3.0

Iron, Fe+3, ppm < 0.3 < 0.05

Strontium, ppm NS < 0.1

Barium, ppm NS < 0.1

Silica, reject, ppm 50-160 50-160

Organics, ppm NS NS

Chlorine, residual, ppm 0.1-0.5 max 0

pH Range 4-6 4-11

Feed Temperature Max, o C 35 ° 45°

Parameter Control - manufactureHollow Fibre

Base on Parameter Control

• Spiral Wound Type of Membrane can be applied by existing Condition pre-treatment before entering Membrane

• More concern only about chlorine residual because currently Residual Chlorine still 0.2 ppm feed the Membrane

• Can be solve by Anti-Chlorine Chemical Injection

PROGRESS

Will be Implemented ASAP Paper Work is Done