NOVELTY - Processing of nitrogenous sewage for generating power and recovering nitrogen, comprises e.g. installing a device, conveying the nitrogenous sewage into a anode chamber I through a anode chamber water inlet, oxidizing sewage by an electricity-producing microorganisms under an anaerobic environment to generate electron and transferring the electron to anode, flowing external circuit current within the electrochemical system from cathode towards anode, discharging treated sewage from anode chamber I through an anode chamber water outlet, and converting nitrogen in the sewage into ammonium ions.    USE - The method is useful for processing of nitrogenous sewage for generating power and recovering nitrogen.    ADVANTAGE - The method is simple, has high economic benefit, and comprises processing device with simple structure.    DETAILED DESCRIPTION - Processing of nitrogenous sewage for generating power and recovering nitrogen, comprises: (i) installing a device; (ii) conveying the nitrogenous sewage into a anode chamber I through a anode chamber water inlet, oxidizing the sewage by an electricity-producing microorganisms under an anaerobic environment to generate electron and transferring the electron to the anode, flowing the external circuit current in the electrochemical system from the cathode towards anode, and discharging the treated sewage from anode chamber I through an anode chamber water outlet; (iii) converting the nitrogen in the sewage into ammonium ions, flowing the external circuit current within the electrochemical system from the anode into cathode, passing the ammonium ions and other cations through a cation exchange membrane into the recovering chamber under the ion gradient by the driven electric potential difference; (iv) conveying the nitrogenous sewage into a cathode chamber III through a cathode chamber outlet, passing air into the cathode chamber III through a aeration pipeline, oxidizing the organic matter in sewage by aerobic microorganisms on the cathode under aerobic condition to convert ammonium ion into nitrate ion, passing nitrate ions and other anions through anion exchange membrane into the recovering chamber under the ion gradient by the driven electric potential difference, transferring the electrons through wire and external resistor into the cathode, and conveying the aerobic microorganisms for reducing the oxygen to complete the process of generating electricity; and (v) passing the solution containing ammonium ions and nitrate ions by a recovery room outlet of the recovering chamber II into a membrane distillation system IV through a membrane distillation system inlet, collecting the concentrated through a membrane distillation concentrate outlet, percolating the exudates of low ionic concentration into the recovering chamber II through a recovery rooms inlet, and at the same time supplying small amount of purified water. An INDEPENDENT CLAIM is also included for a nitrogenous sewage processing device for generating power and recovering nitrogen comprises cation exchange membrane (3) and anion exchange membrane (4). The processing device is divided into anode chamber, recovery rooms II, and cathode chamber III. The anode chamber is provided with an anode (2). The cathode chamber is provided with a cathode (6). The anode and cathode are domesticated. The electricity generating microorganism (1) and aerobic microorganisms are gathered together. The anode and cathode are connected through wire and external resistor. The nitrogenous sewage is passed into anode chamber and cathode chamber III through the anode chamber water inlet and cathode chamber inlet and processed through the anode chamber outlet and the cathode chamber outlet respectively, the recovering chamber II collects the solution of nitrogen and passes into membrane distillation system through a recovery room outlet, the condensed nitrogen containing solution is collected from membrane distillation concentrate outlet, the exudates of low ionic concentration is percolated into the recovery chamber II through a recovery chamber inlet, at the same time small amount of water is added into the recovery chamber II through a recovering chamber water inlet.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the nitrogenous sewage treatment device for generating power and recovering nitrogen.    Electricity generating microorganism (1)    Anode (2)    Cation exchange membrane (3)    Anion exchange membrane (4)    Cathode (6)