Device and method for purifying wastewater
AssigneeNxo Engineering
InventorCesar NARVAEZ
Life of this patent
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Abstract
The device (100) for purifying wastewater comprises: a vacuum anaerobic digester (105) comprising: in the lower part (110), an inlet (115) for wastewater, in the upper part (120): a weir (125) for treated water comprising a water outlet (130) positioned at a first height (131) starting from the lower part and a biogas outlet (135) positioned at a second height (136) higher than the first height, a riser column (140) for raising water by suction of the biogas from the lower part to the upper part, a downer column (141) for bringing down untreated wastewater from the upper part to the lower part and a vacuum pump (145) connected to the biogas outlet, and a buffer column (190) configured to receive wastewater.
Claims19
A device for purifying wastewater, comprising a vacuum anaerobic digester comprising:
- in the lower part, an inlet for wastewater, the lower part being configured to receive a bed of microorganisms, the microorganisms comprising bacteria;
- in the upper part:
- a weir for treated water comprising a water outlet positioned at a first height starting from the lower part;
- and
- a biogas outlet positioned at a second height higher than the first height;
- a riser column for raising water by suction of the biogas from the lower part to the upper part;
- a downer column for bringing down untreated wastewater from the upper part to the lower part;
- and
- a vacuum pump connected to the biogas outlet and configured to cause, when said pump is actuated, the flow of water from the lower part to the upper part;
- a buffer column configured to receive wastewater, the column comprising:
- a wastewater inlet;
- and
- an atmospheric air intake;
- the inlet for wastewater from the digester being connected to the buffer column and configured to supply wastewater by means of a vacuum.
A method for purifying wastewater, comprising a step of anaerobic digestion under vacuum, in a digester, comprising:
- a step of inputting wastewater into the lower part of the digester;
- a step of generating a bed of microorganisms in the lower part of the digester, the microorganisms comprising bacteria;
- a step of raising water, in the riser column of the digester, from the lower part to an upper part of the digester;
- a step of the outflowing of treated water, by a weir in the upper part of the digester, comprising a step of outputting water in a water outlet of the weir for water positioned at a first height;
- a step of outputting biogas, through a biogas outlet positioned at a second height higher than the first height;
- a step of bringing down wastewater, in a downer column, from the upper part to the lower part of the digester;
- and
- a step of vacuum pumping connected to the biogas outlet and configured to cause, when said pump is actuated, the flow of water from the lower part to the upper part;
- a step of inputting wastewater into a buffer column;
- a step of intaking atmospheric air into the buffer column;
- and
- a step of supplying, by means of a vacuum, wastewater in the buffer column to the digester, the digester being connected to the buffer column.
Dependencies are inferred from the claim text.