Document Type

Report

Publisher

Utah State University

Publication Date

1-26-2021

First Page

1

Last Page

3

Abstract

Dissolved oxygen (DO) in water is essential for the metabolism of aerobic organisms in hydroponics, aquaponics, waste water treatment, and aquaculture. DO levels at or near saturation are required to prevent the development of hypoxic conditions (Wei et al., 2019). Water with saturated amounts of DO is achieved by bubbling air through a tube or air stone via an air pump. Using pure oxygen for aeration can increase the concentration of DO from 21% to 100% compared to air. Nanobubbles have diameters on the nanometer scale (10-9 m) and have extended lifetimes in suspension compared to macrobubbles (Atkinson et al., 2019). The combination of pure oxygen and nanobubbles can elevate DO levels for increased aerobic growth. In this study, we tested the dissipation rates of pure oxygen nanobubbles under circulated and uncirculated conditions with tap water and a calcined clay substrate.

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