The invention relates to a sequencing batch type static
sedimentation method and a
system thereof, wherein the method comprises the following steps: at the first static
sedimentation pond
water intake and decanting stage, under the
hydraulic action, the supernatant is lifted layer by layer, is overflown and discharged by a water outlet weir of an air weir water decanting
machine; when the replacement ratio of the supernatant to earth water mixed liquid reaches the set value, and the first static
sedimentation pond
water intake and decanting stage ends; the reaction stage starts,
wastewater after pre-treatment or biochemical treatment is subjected to re-treatment, and the reaction stage ends when the preset reaction time achieves, the first static sedimentation pond enters the static sedimentation stage,
sludge is freely settled in static current, and the static sedimentation stage ends when the preset static sedimentation time achieves; and while the first static sedimentation pond enters the reaction stage, the
water intake and decanting stage of a second static sedimentation pond starts, and actions in the first static sedimentation pond are repeated. The whole
sedimentation process is completed by the sequencing batch type static sedimentation
system formed by at least two static sedimentation ponds, thereby overcoming the defects existing in the dynamic sedimentation mode and having the advantages of strong practicability, high sedimentation efficiency, convenient operation and maintenance, compact structure, high
land use rate and the like.