The invention discloses an energy-saving and consumption-reduction stable operation device and a method for enhancing aerobic granule
sludge. The device comprises a water inlet unit, a reactor main body, an
aeration unit, a water outlet unit and a
time control unit, wherein the
time control unit is a programmable automatic time controller, and comprises a
time control switch and a liquid level meter probe; the time
control switch controls a
cyclic process of reactor operation; and water inflow is controlled by the liquid level meter probe via electrical
signal conduction. An operation cycle is divided into water inlet, standing,
aeration,
settling and water outlet stages;
sludge is inoculated; MLSS (mixed liquor suspended
solid) is inoculated as 4-6g / L; an inlet
water matrix is town
sewage; COD (
chemical oxygen demand) concentration of inlet water is 300-800mg / L; a height-
diameter ratio of 4-8 and a drainage ratio of 30-70% are adopted; the operation cycle is 4-6h; the
settling time is 5-15min; and the
aeration time is 3-5h. According to the device and the method, the aerobic granule
sludge which is large in granule size, high in
settling velocity, stable in structure and rich in
flora can be formed, and the problems of high aeration
energy consumption, easy
sludge bulking in an operation process, unstable long-time operation of a
system and the like in the prior art are solved.