NOVELTY - A microbial electrochemical system comprises bipolar membrane (7) arranged in an electrolytic cell (1) to divide the cell into anode chamber (6) and cathode chamber (5); an anode composed of power generating microorganism and a metallic cathode. The anode and cathode are connected with resistor (3) in the anode and cathode chamber. The anode chamber contains sewage containing organic pollutants, and cathode chamber contains strong acid solution.    USE - As microorganism electrochemical system for generating power, for producing hydrogen and for treating sewage containing organic pollutant such as carboxylate, glucose, starch, protein or ammonia nitrogen of the biochemical degradation of organic waste water, synchronously (claimed).    ADVANTAGE - The microorganism electrochemical system has simple structure; provides convenient operation; and provides high efficiency of generating electricity and sewage treatment at the same time.    DETAILED DESCRIPTION - A microorganism electrochemical system for generating power, producing hydrogen and treating sewage synchronously, comprises electrolytic cell (1) and a bipolar membrane (7) arranged in the electrolytic cell to divide the cell into anode chamber (6) and cathode chamber (5), where the bipolar membrane is formed by compounding the anion exchange membrane (8) and a cation exchange membrane (9). The cationic exchange membrane is located in the cathode chamber, and the anion exchange membrane is located in the anode chamber are respectively set with an anode (2) and a cathode (4). The anode and cathode is connected with the resistor (3) in the anode chamber and a cathode chamber. The anode is composed of power generating microorganism and the anode substrate. The cathode is made of metal titanium, molybdenum or carbon material electrochemically inert, the anode chamber contains with organic pollutant in sewage, and a cathode chamber contains strong acid solution.    DESCRIPTION OF DRAWING(S) - The figure shows integral structure of the microorganism electrochemical system.    Electrolytic cell (1)    Anode (2)    Resistor (3)    Cathode (4)    Cathode chamber (5)    Anode chamber (6)    Bipolar membrane (7)    Anion exchange membrane (8)    Cation exchange membrane (9)