Abstract: The present invention relates to a manhole capable of an oil-water separation. An external air is introduced into a manhole through a inlet guide pipe and naturally and easily separate an oil-water mixture sewage into an oil sewage and the water sewage. The manhole may be installed in an area where the amount of the oil sewage and the water sewage is irregular, e.g., in an area single-family houses, multi-family houses, restaurants, roads, parking lots, gas stations are clustered. According to the present invention, an inlet guide pipe is provided in a manhole body and coupled to an inlet pipe. An oil-water mixture sewage flows in the manhole through the inlet guide pipe. The oil-water mixture sewage drops from the inlet guide pipe, causing turbulence or swirl. Due to the turbulence or swirl, the external air is also introduced through the inlet guide pipe and separates the oil-water mixture sewage into an oil sewage and a water sewage by a specific gravity difference.

Abstract: The present invention relates to a manhole capable of an oil-water separation. An external air is introduced into a manhole through a inlet guide pipe and naturally and easily separate an oil-water mixture sewage into an oil sewage and the water sewage. The manhole may be installed in an area where the amount of the oil sewage and the water sewage is irregular, e.g., in an area single-family houses, multi-family houses, restaurants, roads, parking lots, gas stations are clustered. According to the present invention, an inlet guide pipe is provided in a manhole body and coupled to an inlet pipe. An oil-water mixture sewage flows in the manhole through the inlet guide pipe. The oil-water mixture sewage drops from the inlet guide pipe, causing turbulence or swirl. Due to the turbulence or swirl, the external air is also introduced through the inlet guide pipe and separates the oil-water mixture sewage into an oil sewage and a water sewage by a specific gravity difference.