NOVELTY - Comprehensive treatment of sewage generated by lutein extraction from marigold includes depositing sewage, standing, filtering, adding the filtrate with cultured aerobic activated sludge, continuously aerating, removing large granule impurities, filtering, adding culture medium, culturing at constant temperature, adding culture medium, removing suspension, taking the upper liquid layer, precipitating, standing, adding the upper liquid layer with anaerobic activated sludge, conducting anaerobic fermentation, taking the upper liquid layer, standing, depositing the liquid layer and filtering.    USE - Comprehensive treatment of sewage generated by lutein extraction from marigold.    ADVANTAGE - The method has low cost, small energy consumption, high degree of automation, and reduced labor intensity, is economical, greatly reduces chemical oxygen demand, provides biogas energy and wastewater, which reaches the standard, and combines artificial wetland ecological treatment, thus, beautifying the environment.    DETAILED DESCRIPTION - Comprehensive treatment of sewage generated by lutein extraction from marigold comprises depositing sewage, standing for 6-12 hours, filtering, adding the filtrate with 30-50 vol.% (based on the total volume of filtrate) cultured aerobic activated sludge, continuously aerating for 8-10 days, where aerobic activated sludge culture comprises taking ditch sewage sludge or sewage treatment plant sludge or marsh gas tank or bottom part sludge, removing large granule impurities, filtering, adding culture medium, culturing for 3 days at constant temperature of 35 degrees C, adding culture medium, removing suspension, keeping the culture temperature for 3 days, and repeating for 3-4 times, where culture medium comprises (based on sludge volume) 1 g/L glucose, 63.75 mg/L urea, 12.5 mg/L potassium dihydrogen phosphate (KH2PO4), 25 mg/L magnesium sulfate heptahydrate (MgSO4.7H2O), 20 mg/L calcium chloride (CaCl2), 50 mg/L sodium bicarbonate (NaHCO3), and 1 mg/L trace element solution, which comprises 0.15 g/L iron chloride heptahydrate (FeCl3.7H2O), 0.15 g/L boric acid (H3BO3), 0.03 g/L copper sulfate pentahydrate (CuSO4.5H2O), 0.03 g/L potassium iodide, 0.12 g/L magnesium chloride tetrahydrate (MnCl2.4H2O), 0.06 g/L ammonium molybdate heptahydrate ((NH4)6Mo7O24.7H2O), 0.12 g/L zinc sulfate heptahydrate (ZnSO4.7H2O), 0.15 g/L cobalt chloride hexahydrate (CoCl2.6H2O), taking the upper liquid layer, precipitating, standing for 6-12 hours, adding the upper liquid layer with 40-50% anaerobic activated sludge, conducting anaerobic fermentation for 8-20 days, where anaerobic activated sludge is taken from rural marsh gas tank or marsh gas engineering tank bottom and anaerobic fermentation generates biogas, taking the upper liquid layer, standing for 6-12 hours, depositing the liquid layer, filtering, decoloring using activated carbon at 25-35 degrees C for 3-8 hours, and flowing the decolored clear liquid into artificial wetland system for storage, where artificial wetland system comprises bottom large gravel, middle fly ash layer and upper soil layer. An INDEPENDENT CLAIM is included for integrated processing device for comprehensive treatment of sewage generated by lutein extraction from marigold comprising primary settling tank, first-stage filter tank, aeration system, anaerobic fermentation system, third sedimentation tank, second-level filter tank filled with clinker, decoloring tank filled with activated carbon and artificial wetland system.