with the ozone oxygen mixture air is introduced by line 301 into an air separation unit 302 where oxygen is separated from air oxygen passes by line 303 into an ozone generator 304 and is converted to ozone and this oxygen ozone mixture passes through line 305 into an ozone compressor 310 where it is compressed from here it flows to a control valve 306 that automatically regulates the gas flow by gas flowmeter 307 the ozone gas mixture is introduced to the mixer 309 by an inlet line 308 and is dispersed into the low consistency pulp the pulp slurry gas mixture passes into the column 323 which is held under pressure by a back pressure valve 324 the ozone oxygen mixture dissolves and reacts with the pulp slurry before exiting through valve 324 into line 325 the pulp slurry gas mixture flows into a separator vessel 326 where gases are separated from the pulp and flow through line 327 into an ozone destruct unit 328 where the ozone is destroyed and the gases leave through line 329 the pulp slurry leaves the separator through line 330 and flows into pump 331 where it is pumped through line 332 into a mixer 334 where chlorine dioxide is added through line 333 before flowing by line 335.