Liquid purification or separation – Processes – Treatment by living organism
Patent
1993-12-20
1996-03-05
McCarthy, Neil
Liquid purification or separation
Processes
Treatment by living organism
210150, 210247, 210617, 210903, 405 80, 405108, C02F 300
Patent
active
054964725
ABSTRACT:
This invention relates to a method and apparatus of denitrification. The apparatus includes a weir block, a denitrification vessel having a wall surface, and filter media having microorganisms on their surfaces. The weir block may have a convex outer surface which is tangentially adjacent to and preferably contiguous with the upper end of the wall, whose lower end is in contact with the water in the denitrification vessel. The method may include passing the wastewater over the convex surface of the weir block, passing the water over the second surface of the substantially vertical wall and into the denitrification vessel while preferably maintaining substantially laminar flow and limiting the dissolved oxygen in the denitrification vessel, preferably to below about 5 mg/L and more preferably to below about 4 mg/L.
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The TETRA DeepBed Denite.RTM. System.
Water Pollution Control Federation Manual Of Practice #8, "Activated Sludge".
Ellard Gregory A.
Slack David C.
Green Theodore M.
McCarthy Neil
Tetra Technologies Inc.
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