Alga microbe photosynthetic reaction system

An alga microbe photosynthetic reaction system, comprising:

• a photosynthetic reaction unit being a light permeable pipeline;
• a communicating unit connected to an outlet of the photosynthetic reaction unit;
• a pressure liquid infusion unit having an entrance connected to an outlet of the communicating unit;
• an injection and oxygen discharge device, wherein the injection and oxygen discharge device is a hollow pipe, and comprises an oxygen discharge can and a liquid collection can that are joined to each other, the oxygen discharge can is provided with a liquid entrance, a top exhaust, and a hollow pipe wall, and the liquid entrance leads to an exit of the pressure liquid infusion unit, the top exhaust is located at a top of the oxygen discharge can, and the hollow pipe wall extends from the top exhaust downwards, the injection and oxygen discharge device including an exhaust pipe connected to the oxygen discharge can, a middle section of the oxygen discharge can being provided with a necking portion and a side exhaust, the side exhaust being located below the necking portion, and a top end of the exhaust pipe pierces through the hollow pipe wall;
• and
• a regulation area leading to the liquid collection can and the photosynthetic reaction unit, respectively.