The utility model discloses a
carbon dioxide gas field
sewage treatment device which comprises a three-phase separator, a
sewage buried tank is arranged at the downstream of the three-phase separator, a first electric
ball valve is arranged at the downstream of the
sewage buried tank, a first combined
pool is arranged at the downstream of the first electric
ball valve, and a second combined
pool is arranged at the downstream of the second electric
ball valve. The first combined tank comprises a water collecting tank, an adjusting tank and a
sludge tank, the downstream of the first combined tank is provided with a second combined tank, the second combined tank comprises a first
settling tank and a homogenizing tank, the downstream of the second combined tank is provided with a third combined tank, and the third combined tank comprises a second
settling tank and a homogenizing tank. The third combined tank comprises a
hydrolysis tank, an aerobic tank, a second
sedimentation tank and a coagulative
precipitation tank, and a first dosing device, a blast unit and a buffer unit are arranged at the downstream of the third combined tank. The
carbon dioxide gas field
sewage treatment device combines physical treatment and
chemical treatment, effectively treats sewage and
sludge, and is high in efficiency, especially suitable for
oil field sewage treatment and high in practicability.