The application relates to the
sewage treatment technical field and discloses a circulating treatment and utilization device for rural domestic
sewage, which comprises multiple purification units and a
treatment center. Each purification unit is connected with a
sewage discharge end of each household, multiple adjacent purification units share one
treatment center, the purification unit comprises a pretreatment bin and a purification bin, the bin bodies of the two are provided with circulating heating cavities, sewage first enters the pretreatment bin, is subjected to preliminary
anaerobic decomposition and homogenization, then enters the purification bin for further degradation and purification, each purification unit is provided with a heating
assembly, heat is generated by burning
marsh gas to keep the
environmental temperature in the purification unit within a temperature range suitable for the survival of
bacteria. The
treatment center centrally collects the
marsh gas generated by each household purification unit, and distributes the use of the
marsh gas according to actual conditions, which not only avoids the problem that the purification unit is damaged by low temperature, but also guarantees the activity of the
bacteria in the purification unit, and further improves the treatment efficiency of the sewage.