NOVELTY - Semi-coke wastewater treatment includes taking semi-coke wastewater, coarse filtering using grid or mesh, and removing large particles of debris; adding acidic solution, adjusting pH to 2-6, filtering, concentrating, and removing tar dialysate at concentration ratio of 3-10 times; sedimenting with gravity or centrifugally separating, recovering coal tar and removing tar; mixing second step and third step products, adding acidic solution, adjusting pH to 2-5, extracting, separating, and removing phenol; adding alkali solution, adjusting pH, heating, and evaporating to remove ammonia.    USE - Method for treating semi-coke wastewater (claimed).    ADVANTAGE - The method can recycle coal tar, phenol, ammonia and other resources and has reduced cost.    DETAILED DESCRIPTION - Semi-coke wastewater treatment comprises:    (A) taking semi-coke wastewater having 10000-75000 mg/L chemical oxygen demand (COD), 500-5000 mg/L ammonia, 1000-6000 mg/L total phenol, 10000-30000 times chromaticity and pH of 8-10, coarse filtering using grid or mesh, and removing large particles of debris;    (B) adding acidic solution, adjusting pH to 2-6, filtering, concentrating, and removing tar dialysate at concentration ratio of 3-10 times;    (C) sedimenting with gravity or centrifugally separating, recovering coal tar and removing tar;    (D) mixing second step and third step products, adding acidic solution, adjusting pH to 2-5, extracting, separating, and removing phenol;    (E) adding alkali solution, adjusting pH to 9-11, heating, evaporating to remove ammonia, absorbing with ammonium sulfate, and cooling liquefied ammonia;    (F) adding alkali solution, adjusting pH to 6-9, pumping into anaerobic tank, anaerobically fermenting with methanogenic bacteria, decomposing organic acid into methane and carbon dioxide, improving B/C value, removing most of COD, and improving biodegradability of wastewater;    (G) pumping into aeration basin, putting into sedimentation tank, reacting, recycling to aerobic tank, aerobically processing, oxidative decomposing organic matter, and depth removing COD and biochemical oxygen demand (BOD); stirring, controlling dissolved oxygen at 2-4 mg/L, adding with water, backwash agitating with gas and water, surface growing biofilm aging erosion, and upgrading biofilm;    (H) electrolyzing at 2-12 V and density of 10-320 mA/cm2, decolorizing, deodorizing, improving B/C value, and subsequently biological treating;    (I) pumping into secondary anaerobic tank, anaerobically fermenting with methanogenic bacteria, decomposing organic acid into methane and carbon dioxide, improving B/C value, removing most of COD, and improving biodegradability of wastewater;    (J) introducing into wastewater membrane treatment plant or batch annealing furnace (BAF), introducing into desalination plant, oxidative degrading, purifying, and removing COD, suspended solids and ammonia nitrogen; and    (K) introducing into wastewater membrane treatment or BAF, introducing into desalination plant, dialyzing, separating, adding into recycled water tank, discharging concentrated water, evaporating, and crystallizing.    The desalination plant is reverse osmosis system, nanofiltration system, electrodialysis system or ion capacitor adsorption system.