Using aerobic granular sludge to treat urban wastewater on SBR technology = Sử dụng bùn hạt hiếu khí để xử lý nước thải đô thị bằng công nghệ xử lý theo mẻ SBR

Abstract

Currently, in Vietnam only 10% - 15% of urban wastewater is collected and treated [18]. Wastewater collection systems in urban areas of Vietnam are mostly public drainage systems. Therefore, the operative parameters of water quality parameters such as COD, BOD5, T-P are much lower than those of the design [18]. Therefore, most wastewater treatment plants in Vietnam do not work as efficiently as designed. In Vietnam, many wastewater treatment technologies have been applied, but in regard to capacity, SBR technology accounts for the largest amount with 43.8% [1]. Aerobic granular sludge has been applied in batch reactors SBR since the 1970s and it has been extensively studied with different substances in the following years [2[3]. Compared with activated sludge, aerobic granular sludge has a good granular structure, high biomass retention capacity, and ability to remove more toxic compounds in wastewater [4]. Therefore, it is applied to treat domestic wastewater, wastewater from food processing plants, livestocks, industrial areas, leather processing factories, slaughter halls, breweries... [5]. It is a reliable guarantee for the studies on applying aerobic granular sludge on SBR technology to treat urban wastewater.