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to reduce the water content of sludge generated in wastewater treatment. The electrodewatering system, by incorporat-ing an electric field as an additional driving force to the conventional pressure dewatering, has been evaluated as a func-tion of an electrode material, applied voltage and filtration time. Experiments were carried out using sewage sludgewith a presure up to 392.4 kPa and applied electrical field ranging up to 120 V/cm. Mas median diameter of the sewagesludge by the effect of electrocoagulation increases from 34.7m to the 41.3m. The final water content of sewagesludge in the combination of both electrocoagulation and electrodewatering system can be reduced to 55 wt% pared to 78 wt% achieved with pressure dewatering alone. The combination of electrocoagulation and electrodewa-tering system shows a potential to be an effective method for reducing the water content in sludge.