The invention discloses a
sewage treatment unit with good practicality. The
sewage treatment unit comprises a
settling box, a purifying box and a disinfection box, wherein the top end of one side of the
settling box is provided with a chemical
reagent tank; the top of the
settling box is provided with a stirring motor; a
sludge discharge outlet is formed in the bottom end of the settling box; the interior of the purifying box is provided with, from top to bottom, a
magnet adsorption screen, a biomembrane filter screen and an
active carbon filter screen; the sidewall of the disinfection box is provided with an
ozone generator; and gas-distributing pipes are arranged in the disinfection box. The
sewage treatment unit provided by the invention can effectively eliminate
heavy metals, microbes, organic harmful substances, particulate matters and other impurities in water, is capable of removing pigments and peculiar smell in water, and has improved
sewage treatment effect; and since the
ozone generator is mounted on the sidewall of the disinfection box,
ozone generated by the
ozone generator can be used for sterilization and disinfection of purified clear water after purification of sewage, so sewage is allowed to reach
discharge standard.