NOVELTY - A micro-oxygenation treatment device includes a micro-oxygenation reactor (6) having a mud bed (5) at lower part and a settling zone (7) at upper part. An oxygen pipe (11) connects an oxygen pot (12) to an oxygen aeration head (8) which is inserted into the settling zone. Oxygen flow meter (10) and magnet valve (24) are provided at middle part of oxygen pipe. The magnet valve is controlled by an oxidation-reduction potential online control instrument (23) having a detector (20) inserted into the settling zone. Effluent water backflow device and biogas backflow device are set in the reactor.    USE - Device for micro-oxygenation treatment of molasses alcohol wastewater.    ADVANTAGE - The device has simple structure, low running cost, large organic volume load of the system and high removal rate of chemical oxygen demand. The device removes sulfate radical without affecting the activity of methanogen and without producing second pollution. The device makes full use of the useful component in wastewater, transforms organic polluting substances into methane scientifically and reasonably, and realizes source recycling.    DETAILED DESCRIPTION - A micro-oxygenation treatment device includes an influent water pump (3) connected with a micro-oxygenation reactor (6) by an influent water pipe (4). An adjusting pool is connected with the influent water pump. The micro-oxygenation reactor includes a mud bed (5) at lower part, a settling zone (7) at upper part, and an effluent water pipe (9) at one side of the upper part. The effluent water pipe is connected with an effluent water backflow pump (14) by an effluent water backflow pipe (13) and stretches into the mud bed at the bottom of reactor. A three-phase separator is provided at the top of reactor and is linked with an air-vent pipe (16) toward an air-collecting pot (17) which is connected with a biogas backflow pump (18) through a biogas backflow pipe (15). The biogas backflow pump is connected with a biogas backflow aeration head (19) by the biogas back flow pipe. The biogas backflow aeration head is inserted into the micro-oxygenation reactor settling zone. An oxygen pipe (11) connects an oxygen pot (12) to an oxygen aeration head (8) which is inserted into the micro-oxygenation reactor settling zone. An oxygen flow meter (10) and a magnet valve (24) are provided at middle part of oxygen pipe. The magnet valve is controlled by an oxidation-reduction potential online control instrument (23) through a wire (22). A detector (20) is inserted into the micro-oxygenation reactor settling zone and is connected with the oxidation-reduction potential online control instrument through the wire.    DESCRIPTION OF DRAWING(S) - The figure is a schematic side view of a micro-oxygenation treatment device.    Influent water pump (3)    Influent water pipe (4)    Mud bed (5)    Micro-oxygenation reactor (6)    Settling zone (7)    Oxygen aeration head (8)    Effluent water pipe (9)    Oxygen flow meter (10)    Oxygen pipe (11)    Oxygen pot (12)    Effluent water backflow pipe (13)    Effluent water backflow pump (14)    Biogas backflow pipe (15)    Air-vent pipe (16)    Air-collecting pot (17)    Biogas backflow pump (18)    Biogas backflow aeration head (19)    Detector (20)    Wire (22)    Oxidation-reduction potential online control instrument (23)    Magnet valve (24)