The invention discloses an environment-friendly
sewage treatment device which is characterized in that a
sewage tank, a
mixing tank, a filter pressing device, an oxidation disinfection tank, a catalytic reaction tank, an adsorption tank and a water return tank are arranged in a shell from top to bottom,
wastewater in the
sewage tank is filtered by a
barrel-shaped
sand filter screen and then enters the
mixing tank to be mixed with liquid
medicine sprayed by a spraying device, and then the
wastewater enters the filter pressing device; water is separated from precipitated impurities, then enters the oxidation disinfection tank to be disinfected by
ozone, then enters the catalytic reaction tank, is added with a catalyst to accelerate an
ozone oxidation disinfection reaction, and then enters the adsorption tank to be subjected to final adsorption treatment, so that
wastewater treatment is completed; organic pollutants are converted into harmless gas products (CO2), liquid products (water) and
solid sludge rich in organic matters; and carrying out
solid-liquid separation on the redundant
sludge in the filter pressing device under the filter pressing action, and sterilizing and killing
bacteria and viruses by using
ozone or
chlorine. Finally, residual pollutants in water are removed through an
activated carbon adsorption method and the like, and then
treated water is fed into a
reclaimed water channel to be used as circulating water.