In light of the environmental problems raised by textile industry wastewater and of the limitations of the treatment processes currently used, there is an urgent need for effective, environmentally friendly and economically attractive technologies for textile wastewater treatment. In this context, the novel aerobic granular sludge (AGS) technology is a promising bioprocess for textile wastewater treatment. The formation and use of AGS began tobe reported in the late 1990s [10] and has recently been applied with success in domestic full-scale wastewater treatment plants(WWTP) with significant reductions in footprint and energy consumption, being pointed as the next generation of wastewater treatment technologies [11,12].