The invention relates to a PACT (powdered
activated carbon treatment) process and an PACT process device. The
activated carbon-microbial
zoogloea culture method comprises the following steps: selecting
activated sludge, and culturing until the
activated sludge is mature; and adding powdered
activated carbon to ensure that the powdered activated carbon serving as a core is wrapped by microorganisms to form activated carbon-microbial
zoogloea floccules, and acclimating, thus increasing the
specific gravity of the powdered activated carbon and enhancing the precipitability. In the PACT process device, a
sludge return tank is added, and the powdered activated carbon is added into the
sludge return tank, so that the powdered activated carbon and the microorganisms can form activated carbon-microbial zoogloeae in the
sludge return tank, thereby prolonging the
retention time of the powdered activated carbon in a
water treatment system; and sludge in the sludge return tank is lifted into a
sewage inlet at the front end of an aerobic tank through a lifting pump, so that the sludge and
sewage can be better mixed, thereby prolonging the
retention time of the powdered activated carbon in the aerobic tank and enhancing the
treatment effect. On the basis of prolonging the
water retention time of the aerobic tank, the invention does not need to increase the volume of the original aerobic tank, and is small in occupied area and easy to implement.