NOVELTY - A water treatment of synchronous power generation and groundwater nitrate removal comprises oxidizing sewage in the wastewater by power generating microorganism on the anode (2) and transferring generated electron to the anode. The current of external circuit of the microorganism fuel cell flows from the anode to cathode (5).    USE - Method for water treatment of synchronous power generation and groundwater nitrate removal (claimed).    ADVANTAGE - The method provides easy operation, low process energy consumption, high production efficiency, low operation cost, and no secondary pollution. The device is simple in structure, convenient to enlarge industrial production and application.    DETAILED DESCRIPTION - Water treatment of synchronous power generation and groundwater nitrate removal involves leading sewage into anode chamber, oxidizing sewage in wastewater by power generating microorganism on the anode and transferring generated electron to the anode. The current of external circuit of the microorganism fuel cell flows from the anode to cathode. A fuel cell current from anode to cathode flow in the anode chamber is cation through cation exchange membrane into a cathode chamber. The water chamber processes the nitrate polluted underground water. Nitrate ion passes through anion exchange membrane (6) into the cathode chamber. The electron transfers to the cathode and the denitrifying microorganism (4). The nitrate ion in the denitrifying microorganism is reduced through lead and resistor (7). The nitrate ion is continuously reduced, and enters into cathode chamber of the water chamber under the drive of the ion gradient. Ground water of carbonate and bicarbonate ion passes through the anion exchange membrane into the cathode chamber as carbon source from the denitrifying microorganism. An INDEPENDENT CLAIM is included for a water treatment device of synchronous power generation and groundwater nitrate removal.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view of a water treatment device.    Anode (2)    Microorganism (4)    Cathode (5)    Anion exchange membrane (6)    Resistor (7)