NOVELTY - A photosynthetic microbial fuel cell comprises a cathode chamber (10) and anode chamber (9) connected to each other with proton exchange membrane (6), and vacuum pad (5) clamped among proton exchange membrane and two electrode chambers to maintain the sealing. Both cathode and anode chambers are designed with venting holes, feeding ports (7) and sampling ports (8). Upper parts of cathode and anode chambers are opened and vented in the air to form an aerobiotic state. The cathode chamber is equipped with an air inlet used for taking hydrogen and methane.    USE - A photosynthetic microbial fuel cell for production of hydrogen and methane (claimed).    ADVANTAGE - The fuel cell has simple structure, and improves oxygen content on cathode surface without adding an electron transfer medium and external power. The wastewater added to anode can improve the generation of electric energy, thus saving cost and reducing pollution.    DETAILED DESCRIPTION - A photosynthetic microbial fuel cell comprises a cathode chamber (10) and anode chamber (9) connected to each other with proton exchange membrane (6), and vacuum pad (5) clamped among proton exchange membrane and two electrode chambers to maintain the sealing. Both cathode and anode chambers are designed with venting holes, feeding ports (7) and sampling ports (8). Upper parts of cathode and anode chambers are opened and vented in the air to form an aerobiotic state. The cathode chamber is equipped with an air inlet used for taking hydrogen and methane. A graphite electrode in cathode chamber, and another graphite electrode in anode chamber are connected with an external loading resistor through a lead. The cathode chamber is filled with cathode buffering solution. The anode chamber is filled with anode buffering solution and culture medium. The graphite electrode is placed into a culture dish to enrich photosynthetic microbes. A mature biomembrane is formed to absorb photosynthetic microbes. An anode with mature biomembrane is inserted into anode chamber. An organic waste and heavy metal wastewater are added to feeding port at anode chamber. A potassium ferricyanide is added at feeding port of cathode.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of a photosynthetic microbial fuel cell.    Vacuum pad (5)    Proton exchange membrane (6)    Feeding port (7)    Sampling port (8)    Anode chamber and cathode chamber (9, 10)