The invention relates to a dispersive
sewage multilayer soil ecological treatment device which comprises a
raw water tank, a first
sedimentation tank, a contact oxidation tank, a
biological filter tank, a second
sedimentation tank, a flow regulating tank, a
soil treatment tank and a
water collection tank which are connected in sequence,, wherein the
raw water tank, the contact oxidation tank, the
biological filter tank, and the
soil treatment tank are respectively connected to an
air blower, and the
soil treatment tank comprises a tank body, a water distributing
pipe, a water passing layer, a soil layer, a ventilation layer, an
air layer, a
quartz sand layer, a cobblestone layer and a water collecting
pipe. A treatment method comprises the following steps of: (1) lifting
sewage to the first
sedimentation tank for anaerobic sedimentation after collecting the
sewage by using the
raw water tank; (2) entering the contact oxidation tank, and then making discharged water pass through the
biological filter tank; (3) after passing through the second sedimentation tank, making the discharged water enter the flow regulation tank, and then delivering the discharged water to the soil treatment tank; and (4) intermittently performing
water intake and ventilation on the soil treatment tank. The invention effectively improves the
osmotic coefficient of a soil layer, the hydraulic loading is up to above 2.0-8.0m and is increased by dozens of times higher than the traditional soil treatment method, and the treatment efficiency is obviously improved.