UASB is an upflow anaerobic sludge bed, which belongs to anaerobic activated sludge treatment process. SBR is a sequencing batch activated sludge process, which belongs to aerobic activated sludge treatment process. UASB+SBR is a combination of the two, generally aerobic first and then anaerobic. The combination of the two mainly depends on the specific components. This treatment method is also very common in China, and is generally used for the treatment of food and printing and dyeing wastewater. It belongs to the classic biochemical treatment.