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US 10,894,732 B2Granted
Systems and methods for treating wastewater
AssigneeRegents of the University of Minnesota
InventorsPaige Novak, Santiago Romero-Vargas Castrillon, Anndee Huff, Marc A. Hillmyer, Michael Tsapatsis
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Abstract
The present disclosure relates to wastewater treatment systems for attracting and retaining anaerobic ammonia oxidizing (anammox) bacteria, methods of treating wastewater using such wastewater treatment systems, and the like.
Claims16
A wastewater treatment system for attracting and retaining anammox bacteria, the system comprising:
- a plurality of elongated air-permeable hollow fiber membranes spaced apart and assembled into an array, each having a proximal end mounted to a header and an unmounted distal end freely extending therefrom, and
- a plurality of zeolite particles tethered to, or embedded, entrapped, or grown on the surface of each of the plurality of elongated air-permeable hollow fiber membranes,
- wherein the plurality of elongated air-permeable hollow fiber membranes is adapted to controllably deliver air to bacteria that generate nitrite and the plurality of zeolite particles is selected to preferentially adsorb ammonium from wastewater, wherein the system attracts and retains anammox bacteria by concentrating, on the surface of the elongated air-permeable hollow fiber membranes, the ammonium and nitrite for use by the anammox bacteria.
A wastewater treatment system for selectively attracting and retaining anammox bacteria, the system comprising:
- a plurality of hard polymer pieces capable of being suspended in a mixed-liquid system, and
- a plurality of zeolite particles provided on the surface of each of the plurality of hard polymer pieces,
- wherein the plurality of hard polymer pieces is adapted to promote biofilm growth and retention of one or more of anammox bacteria, AOB, and AOA, and the plurality of zeolite particles is selected to preferentially adsorb ammonium from wastewater,
- wherein the system attracts and retains anammox bacteria by concentrating, on the surface of the hard polymer pieces, ammonium for use by the anammox bacteria.
1 more element
Dependencies are inferred from the claim text.