NOVELTY - A wastewater treatment equipment comprises acceptance part which receives organic refuse pulverized into waste liquid, solid-liquid separation tank (2) which carries out precipitation-separation of waste liquid, liquid phase anaerobic fermentation part (5) which biogasifies organic substance contained in liquid phase by which solid-liquid separation is carried out, deposit anaerobic fermenter (3) which receives and biogasifies the deposit (26c) by which precipitation-separation is carried out, advection part (26) which carries out advection of the deposit, and aperture part (26a).    USE - A wastewater treatment equipment for home-use purification tank.    ADVANTAGE - The wastewater treatment equipment achieves size reduction and can contribute to volume reduction of garbage, effective usage of renewable energy, and carbon-dioxide-gas generation amount reduction.    DETAILED DESCRIPTION - A wastewater treatment equipment comprises acceptance part which receives organic refuse pulverized into waste liquid, solid-liquid separation tank (2) which carries out precipitation-separation of waste liquid, liquid phase anaerobic fermentation part (5) which biogasifies organic substance contained in liquid phase by which solid-liquid separation is carried out, deposit anaerobic fermenter (3) which receives and biogasifies the deposit (26c) by which precipitation-separation is carried out, advection part (26) which carries out advection of the deposit, aperture part (26a) which occludes between solid-liquid separation tank and deposit anaerobic fermenter with the deposit and prevents back flow to the solid-liquid separation tank from the deposit anaerobic fermenter of a solid component in the advection part, deposit advection mechanism which enables return of the excessive liquid phase of the deposit anaerobic fermenter to the solid-liquid separation tank through the aperture part, and biogas extraction path which takes out the generated biogas outside the liquid phase anaerobic fermentation part and the deposit anaerobic fermenter. An INDEPENDENT CLAIM is included for operation method of wastewater treatment equipment which involves supplying gas by gas supply apparatus in response to the decrease in the biogas of the deposit in the deposit anaerobic fermenter.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the vertical side view of the wastewater treatment equipment in line V-V. (Drawing includes non-English language text).    Solid-liquid separation tank (2)    Deposit anaerobic fermenter (3)    Liquid phase anaerobic fermentation part (5)    Advection part (26)    Aperture part (26a)    Deposit (26c)