The invention relates to a split-level superimposed biological
filtration and
oxygenation device. The split-level superimposed biological
filtration and
oxygenation device comprises circulating water containers, as well as porous drip water plates and micro-particle medium
layers, which are arranged in cavities of the circulating water containers, and the split-level superimposed biological
filtration and
oxygenation device is composed of a plurality of the circulating water containers with the same structure which are superimposed and connected in sequence; and a
pure oxygen flow area is arranged in the cavity of each circulating water container, the split-level superimposed biological filtration and oxygenation device further has a
pure oxygen and water mixed container, and the mixed container is connected in series with all the circulating water containers. The split-level superimposed biological filtration and oxygenation device provided by the invention adopts the plurality of the split-level superimposed circulating water containers, after the
pure oxygen flow areas and an automatic cleaning
water spray pipe are increased, a certain number of modular circulating water containers can be selected according to requirements of cultivation scale, and when the flow rate of
water flow is equivalent, the biological filtration efficiency is doubled; under the action of a tortuous
oxygen flow channel formed by a plurality of
oxygen diversion plates, pure
oxygen and water can be fully mixed and realize
contact reaction, and the oxygenation effect becomes very ideal; and the
water spray pipe can realize automatic
pollution discharge and high time-saving and labor-saving efficiency.