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US 12,344,542 B2Granted
Wastewater treatment device and method
AssigneeAriel Scientific Innovations Ltd.
InventorsYaakov Anker, Alexander Gimburg
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Abstract
Disclosed are methods and devices that are useful for processing wastewater, such as stormwater runoff, greywater, blackwater and combinations thereof. In some embodiments of the devices, water is drawn from relatively deep in a microbial processing container, aerated with a Venturi air pump, and subsequently expelled to a relatively shallow part of the microbial processing container.
Claims20
A wastewater treatment device, comprising:
- a. a microbial processing container defining an internal volume that, when positioned for operation, has a top and a bottom at a depth of at least about 3.25 m from said top, wherein:
- a bottom-most horizontal layer of said internal volume at least 1 m deep is designated as an anaerobic layer that during operation of the device is filled with wastewater;
- a horizontal layer of said internal volume immediately above said anaerobic layer and at least 2 m deep is designated as an aerobic layer that during operation of the device is substantially filled with wastewater;
- and
- a horizontal layer of said internal volume immediately above said aerobic layer is designated as a humid layer that during operation of the device substantially contains a gas;
- b. a wastewater inlet positioned to direct influent wastewater into said aerobic layer of said internal volume;
- c. a water outlet positioned to remove water from said aerobic layer of the internal volume as effluent, said water outlet at least one meter distant from said wastewater inlet and at least 2 meters above said bottom of said internal volume;
- d. at least one water circulation pump, each such said water circulation pump having:
- a pump inlet positioned to draw water from said aerobic layer and/or said anaerobic layer at least 1 meter below said top of said internal volume, and a pump outlet positioned to expel drawn water to a portion of said internal volume corresponding to said aerobic layer at least 1.5 meter above the bottom of said internal volume, wherein said pump inlet is positioned deeper in said internal volume than said pump outlet;
- e. a Venturi air pump positioned on a water conduit between said water circulation pump and each associated said pump outlet, said Venturi air pump having a motive fluid inlet, a side inlet in fluid communication with ambient air and a Venturi outlet, so that water pumped by said water circulation pump into said motive fluid inlet and flowing towards said pump outlet via said Venturi outlet draws ambient air through said side inlet to aerate said pumped water;
- and
- f. particulate substrate at least about 3.25 m-deep filling said anaerobic layer, said aerobic layer and said humid layer of said internal volume.
9 more elements
Dependencies are inferred from the claim text.