The invention relates to a chemimechanical pulp
wastewater treatment system. The chemimechanical pulp
wastewater treatment system comprises a
wastewater regulation tank, a reinforcing floatation tank, an
ozone oxidation and
sedimentation tank, a cross-flow anoxic and
anaerobic reaction tank, a perfect mixing aerobic tank, a secondary
sedimentation tank and a
backflow biological aerated filter tank, wherein the reinforcing floatation tank sequentially comprises a mud-sand region, a mixing region and a separation region from bottom to top; the
ozone oxidation and
sedimentation tank comprises an aerated mixing region and a sedimentation region; the cross-flow anoxic and
anaerobic reaction tank comprises a
facultative aerobic section, an anoxic section and an anaerobic section which are separated by baffle plates; the perfect mixing aerobic tank is provided with a water inlet
pipe, a water distribution triangular cone and an
aeration regulation and
control system; and the
backflow biological aerated filter tank comprises a lower flow region, an upper flow region and a
sludge region. According to the chemimechanical pulp wastewater
treatment system, wastewater enters the reinforcing floatation tank through the wastewater regulation tank, scum is removed, the wastewater enters the
ozone oxidation and sedimentation tank, pollutants are oxidized and decomposed, and then the wastewater enters the cross-flow anoxic and
anaerobic reaction tank and the perfect mixing aerobic tank to be subjected to anoxic, anaerobic and aerobic reactions, reacts and is filtered in the
backflow biological aerated filter tank and is then reused.