NOVELTY - Pharmaceutical sludge is reduction-treated by conveying gravity concentrated sludge through inlet mud pipe (1) into mud pool (2), uniformly stirring, conveying sludge to ozone oxidation reactor through peristaltic pump, entering 50-100 mg ozone (O3)/g total solids (TS) through titanium alloy diffuser into ozone contact column, allowing oxidation to occur at pH 5-8 and 20-25 degrees C, stirring oxidized sludge into anoxic mixing tank (7), stirring anoxic sludge into anaerobic digestion reactor (10), anaerobically digesting at pH 6.5-7.5 and 33-37 degrees C, collecting biogas, and measuring methane content.    USE - Reduction treatment of pharmaceutical sludge (claimed).    ADVANTAGE - Total chemical oxygen demand (TCOD) removal rate is 65-80%, and volatile solid (VS) removal rate is 40-59%. Anaerobic digestion hydrolysis process is shortened while maximizing anaerobic digestion efficiency of the sludge, and sludge treatment cost is low.    DETAILED DESCRIPTION - Pharmaceutical sludge is reduction-treated by conveying gravity concentrated sludge through inlet mud pipe into mud pool, uniformly stirring, conveying sludge to ozone oxidation reactor through peristaltic pump in which reactor has ozone generator, ozone contact column, and tail gas collection device, ozone generator gas is air, and ozone source concentration is 10-33 mg/L, entering 50-100 mg ozone (O3)/g TS through titanium alloy diffuser into ozone contact column, allowing oxidation to occur at pH 5-8 and 20-25 degrees C, stirring oxidized sludge into anoxic mixing tank, stirring anoxic sludge into anaerobic digestion reactor, anaerobically digesting at pH 6.5-7.5 and 33-37 degrees C for 10-15 days in which biogas is produced, collecting biogas using biogas collection device (11), and measuring methane content.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the reduction treatment of pharmaceutical sludge.    Inlet mud pipe (1)    Mud pool (2)    Ozone generator (4)    Ozone contact column (5)    Tail gas collection device (6)    Anoxic mixing tank (7)    Anaerobic digestion reactor (10)    Biogas collection gas (11)