Development of aerobic granular in rubber industry wastewater

Abstract

Seed sludge from rubber industry wastewater treatment plant was used. Aerobic granular sludge was cultured in sequencing batch reactor (SBR) which was operated with total cycle of 4 hours. It was fed with rubber wastewater with inconsistent organic loading. After 34 days operation, settling velocity increases from 0.98 cm/s to 2.49 cm/s, the average diameter distribution of granules ranged from 2 mm to 4 mm. COD removal efficiency was at constant level of 78-98% remova