13-04-2021 дата публикации
Номер: CN212954786U
The utility model discloses a stepped deeply-buried septic tank in the technical field of septic tanks, which comprises a first-stage septic tank, a sealing cover, an anti-gas-return through pipe assembly and the like, and is characterized in that when sewage needs to be input into the septic tank, an anti-gas-return bag is taken down, a sewage output pipe is connected with a first connecting pipe, and the sewage is input into the anti-gas-return through pipe assembly; sewage flows downwards along the first connecting pipe, the baffle, the transition pipe and the second connecting pipe and finally flows into the first-stage septic tank through the through pipe, the free end of the through pipe inclines upwards to prevent the phenomenon that the sewage overflows through the through pipe when the humic gas in the septic tank moves upwards to a certain extent, the sewage is subjected to solid-liquid separation in the second-stage septic tank, and a liquid part falls into the third-stage septic ...
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