Constructed wetland wastewater treatment equipment for continuous operation at low temperatures

摘要

The present invention discloses a constructed wetland wastewater treatment equipment for continuous operation under low temperatures which comprises: three-section substrates filled in the constructed wetland, ventilation pipes being arranged in the substrates, a height of a bed of the constructed wetland being higher than a height of the substrates; a double wall used as a barrier at periphery of the constructed wetland, an organic substance being filled inside the double wall to perform a ferment heat generation; a water distributing pipe disposed at a top of the three-section substrates and a water collecting pipe disposed at a bottom of the three-section substrates, a water outlet of the water collecting pipe being higher than the height of the bed of the constructed wetland and two other water outlets, namely a water outlet at the same hight as the bottom of the bed and a water outlet located at a height halfway the height of the bed, also called the middle water outlet; and a water inlet pipe connected to an upper portion at one end of the three-section substrates and a water outlet pipe connected to a lower portion at the other end of the three-section substrates, a water outlet of the water outlet pipe being higher than the height of the bed of the constructed wetland, wherein, the water distributing pipe and the water inlet pipe are respectively connected to the water head tank, the water inlet pipe and the water outlet pipe can be closed when the water enters the water distributing pipe, so that the water can be discharged through the highest water outlet of the water collecting pipe, and the water can be adjusted to be discharged through the middle water outlet after the heat preservation layer composed of the ice layer and the air layer is formed; the water distributing pipe and the water collecting pipe at the bottom can be closed so that when the water enters the water inlet pipe, the water can be discharged through the highest water outlet of the water outlet pipe, and the water can be adjusted to be discharged through the middle water outlet after the heat preservation layer composed of the ice layer and the air layer is formed.