The invention discloses a dispersive household
sewage treatment system for high and cold areas. The
system comprises an anaerobic digester, a
biofilter and an artificial
wetland. Household
sewage enters the anaerobic digester through a water
inlet manifold, enters into the
biofilter through a water outlet tube after hydrolytic acidification, and the
sewage is uniformly distributed in a
filter material through a filter head, so that a
biofilm where the sewage is adhered to the surface of the
filter material is in full contact for purification; an
effluent enters the artificial
wetland through a porous partition plate and is further purified and discharged through a water outlet manifold; and the anaerobic digester is of a pre-buried steel concrete structure. A
biogas collecting tube and a solar top cover are arranged on the top of the digester. The
biogas collecting tube is connected to a
biogas capacity
system, the solar top cover is connected to a
solar heater, and produced heat is used for heating the anaerobic digester.
Exhaust gas discharged by the biogas capacity
system is introduced into the artificial
wetland, the raw materials are provided for
photosynthesis of planted crops while the temperature in the shed of the artificial wetland is increased by applying
greenhouse gas, and growth of the crops of the artificial wetland is promoted.