Using oil immersion to deliver a naturally-derived, stable bromoform product from the red seaweed Asparagopsis taxiformis

Magnusson, Marie, Vucko, Matthew J., Neoh, Tze Loon, and de Nys, Rocky (2020) Using oil immersion to deliver a naturally-derived, stable bromoform product from the red seaweed Asparagopsis taxiformis. Algal Research, 51. 102065.

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Abstract

Asparagopsis taxiformis (Asparagopsis) inhibits the production of enteric methane in ruminants. A next critical step in the implementation of this technology is the delivery of a naturally-derived product that maximises the concentration and longer-term retention of bromoform. This study (1) quantified the effects of solvent (water or oil), initial processing (intact or homogenised), and temperature (4 or 25 °C) on the stabilisation of bromoform over time, and (2) assessed the effects of increasing the biomass loading (g biomass mL−1 solvent) of Asparagopsis on the concentration of bromoform in a formulation. The most effective method was to homogenise freshly-collected Asparagopsis in oil, which resulted in the highest concentration of bromoform (19.2 ± 2.1 mg g−1 dw algae) in the homogeneous product in the shortest time (one day). In addition, the final product had a shelf life of at least 12 weeks, even when stored at room temperature (25 °C). Notably, there was an increase in the concentration of bromoform per mL of oil between each increment of biomass loading tested, with the highest concentration of bromoform of 4.04 ± 0.51 mg mL−1 in the maximum ratio of biomass to oil of 120 g 100 mL−1. The method described here provides a viable processing alternative to freeze-drying, resulting in the stabilisation of the bromoform from Asparagopsis, which will be critical to the success of using Asparagopsis on a larger scale to mitigate the production of methane in ruminants.

Item ID: 67525
Item Type: Article (Research - C1)
ISSN: 2211-9264
Keywords: Methanogenesis, Anti-methanogenic, Greenhouse gas emissions, Ruminant, Agriculture
Copyright Information: © 2020 Elsevier B.V. All rights reserved.
Date Deposited: 30 Mar 2021 02:37
FoR Codes: 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3005 Fisheries sciences > 300501 Aquaculture @ 100%
SEO Codes: 10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1002 Fisheries - aquaculture > 100299 Fisheries - aquaculture not elsewhere classified @ 50%
26 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 2699 Other plant production and plant primary products > 269999 Other plant production and plant primary products not elsewhere classified @ 50%
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