▎ 摘　　要

NOVELTY - Direct-discharging treatment method of high salinity fracturing flow-back liquid involves orderly performing primary electro-catalysis oxidation treatment and secondary electro-catalysis oxidation treatment to fracturing backflow liquid to obtain fracturing backflow liquid after electro-catalysis oxidation treatment, performing biological electron sulfur integration (BESI) biological treatment to obtain fracturing backflow liquid after BESI biological treatment, adding pressurized cracking liquid digestion agent in fracturing backflow liquid after BESI biological treatment, reacting for 20-50 minutes to obtain fracturing backflow liquid after adding medicine treatment, catalytically oxidizing fracturing backflow liquid after adding medicine for 20-40 minutes to obtain fracturing backflow liquid after ozone catalytic oxidation, carrier ozone catalytic packing when ozone catalyzed oxidation, hydrogen peroxide and silicon aluminum are added, and two stage filtering. USE - The method is used for direct-discharging treating high salinity fracturing flow-back liquid. DETAILED DESCRIPTION - Direct-discharging treatment method of high salinity fracturing flow-back liquid involves orderly performing primary electro-catalysis oxidation treatment and secondary electro-catalysis oxidation treatment to fracturing backflow liquid to obtain fracturing backflow liquid after electro-catalysis oxidation treatment, performing BESI biological treatment to obtain fracturing backflow liquid after BESI biological treatment, adding pressurized cracking liquid digestion agent in fracturing backflow liquid after BESI biological treatment, reacting for 20-50 minutes to obtain fracturing backflow liquid after adding medicine treatment, catalytically oxidizing fracturing backflow liquid after adding medicine for 20-40 minutes to obtain fracturing backflow liquid after ozone catalytic oxidation, carrier ozone catalytic packing when ozone catalyzed oxidation, hydrogen peroxide and silicon aluminum are added, and carrying out two stage filtration to fracturing backflow liquid after ozone catalytic oxidation. The BESI biological treatment involves adding fracturing backflow liquid after electro-catalysis oxidation treatment into bioreactor composed of anaerobic zone, anoxic zone and aerobic zone, and adding sulfur electron acceptor for biological treatment. The BESI biological treatment involves adding nano zinc oxide, nano graphene or nano lignocellulose in anaerobic sludge at adding amount of 0.1 g/kg.