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TJB Coal Power Plant Seawater Desalination – Granular Carbon Filtration for Wastewater Reuse

2025-07-30

Location: Central Java, Indonesia

Industry: Power Plant & Seawater Desalination

Application: RO pretreatment wastewater polishing

Product Used: Coconut shell-based granular activated carbon (iodine value ≥1000 mg/g)

Project Start: August 2024

Project Overview

The project involves the treatment of high-strength wastewater generated from the backwash cycle of a seawater reverse osmosis (SWRO) pretreatment system at a coastal coal-fired power plant. The water contains elevated levels of suspended solids and organics, including humic substances and low-molecular-weight acids. Granular activated carbon (GAC) filtration was integrated downstream of physical clarification to further reduce organic loading and improve SDI stability.

Water Quality Parameters

TSS (Total Suspended Solids): 155 mg/L (peak design)

TOC (Total Organic Carbon): up to 5 mg/L

Filtrate TOC: ≤0.75 mg/L

Organic removal (UV254 method): ≥85%

SDI (Silt Density Index): consistently ≤3, meeting SWRO feedwater specs (SDI <5)

Process Design

Carbon Type: High-iodine GAC, coconut shell origin, mesh size 8*30
Filtration Mode: Gravity-fed media filtration
Post-treatment use: Reuse within plant or discharge to marine environment

Outcome

Significant reduction in membrane fouling risks
Extended membrane cleaning cycles and improved system uptime
Stable operation during seasonal water quality fluctuations

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Company Cases about TJB Coal Power Plant Seawater Desalination – Granular Carbon Filtration for Wastewater Reuse

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TJB Coal Power Plant Seawater Desalination – Granular Carbon Filtration for Wastewater Reuse