NOVELTY - A difficultly degraded organic wastewater is recycled by pumping difficultly degraded organic wastewater with chemical oxygen demand concentration of 1000-10000 mg/L, ammonia nitrogen concentration of 100-2000 mg/L, pH of 1-14, and boron (B)/carbon (C) ratio of less than or equal to 0.2 using water pump in preprocessing unit at 15-35 degrees C in which hydraulic residence time (HRT) is 12-48 hours, flowing from preprocessing unit outlet to microbial fuel cell (MFC) anode room, performing anaerobic treatment at 15-35 degrees C in which HRT is 12-48 hours, and flowing to anoxic unit at 15-35 degrees C in which HRT is 12-48 hours.    USE - Recycling of difficultly degraded organic wastewater (claimed).    ADVANTAGE - Recycling method is low energy in consumption and scientific and has high COD and ammonia nitrogen removal rate, and water quality meets sewage treatment plant pollutant discharge standard.    DETAILED DESCRIPTION - A difficultly degraded organic wastewater is recycled by pumping difficultly degraded organic wastewater with chemical oxygen demand (COD) concentration of 1000-10000 mg/L, ammonia nitrogen concentration of 100-2000 mg/L, pH of 1-14, and boron (B)/carbon (C) ratio of less than or equal to 0.2 using water pump in preprocessing unit at 15-35 degrees C in which hydraulic residence time (HRT) is 12-48 hours and preprocessing method includes pH regulation, hydrolysis acidification, Fenton oxidation, and electrolysis, flowing from preprocessing unit outlet to microbial fuel cell (MFC) anode room, performing anaerobic treatment at 15-35 degrees C in which HRT is 12-48 hours, and anode material is carbon felt, carbon cloth, graphite, or modified modification material, flowing to anoxic unit at 15-35 degrees C in which HRT is 12-48 hours and dissolve oxygen concentration is 0.1-1 mg/L, flowing from anoxic unit outlet to membrane bioreactor (MBR) aerobic unit i.e. MFC anode room at 15-35 degrees C in which HRT is 12-24 hour, dissolve oxygen concentration is 2-6 mg/L, and MBR membrane module and MFC anode material is conductive polymer-modified stainless steel net, non-woven fabric, carbon felt, or carbon cloth, and discharging and recycling wastewater from MBR water outlet using drain pump through pipeline.    DESCRIPTION OF DRAWING(S) - The drawing shows a process flow chart of difficultly degraded organic wastewater recycling. (Drawing includes non-English language text).