The invention discloses an 
airlift type internal circulation intermittent aerobic granular 
sludge reactor, which comprises an 
organic glass column, a temperature controller, a water inlet tank, an 
aeration pump, a water 
feed pump, a draining pump, a flow meter, a programmable logical controller, etc. The main body of the reactor is the 
organic glass column and can be divided into an inner sleeve and an outer sleeve, and the inner one is an upspout, while the outer one is a downcast 
pipe; the ratio of height to 
diameter is 15. The exterior of the downcast 
pipe is provided with a water bath heating casing for controlling 
reaction temperature. Mixed liquor in the reactor flows between the upspout and the downcast 
pipe in internal circulation to endow granular 
sludge with a self-balanced micro-
ecosystem, the property of the micro-
ecosystem is suitable for an up-flow type 
wastewater treatment system. The reactor adopts the sequence 
batch operation mode and can realize 
automatic control by the programmable logical controller. The reactor of the invention has the advantages of flexible operation, compact structure, little 
sludge remained, good 
treatment effect, and the like, and can bear high 
volume load and 
impact load; furthermore, the reactor has small occupying space and can reduce pork 
barrel due to relatively large H / D.