Seaweed salt from Ulva: a novel first step in a cascading biorefinery model

Magnusson, Marie, Carl, Christina, Mata, Leonardo, de Nys, Rocky, and Paul, Nicholas A. (2016) Seaweed salt from Ulva: a novel first step in a cascading biorefinery model. Algal Research, 16. pp. 308-316.

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Abstract

We compared post-harvest processing of two species of Ulva (chlorophyta) using 36 washing time-by-temperature combinations. We quantified the yield of crystallized salt after evaporation of the washing water as a target product and characterized the composition of salts and processed biomass, with the additional aim of improving the composition of the processed biomass for production of fertilizer, feed or fuel. Washing of biomass of Ulva ohnoi and Ulva tepida effectively reduced its mineral content with concomitant production of crystalline salts with Na:K ratios of 1.1-2.2 and a maximum of 19% soluble fiber (ulvan). The maximum yield of salt was 29% of the biomass for U. ohnoi and 36% for U. tepida. Salts from both species have potential for human health applications and functional foods. Washing increased the energy content of the biomass from both species by 20-50% to a maximum of 18 MJ kg⁻¹ and protein contents by 11-24% to a maximum of 27.4%. The production of seaweed salt is therefore a novel first step in a cascading biorefinery model for the utilization of macroalgal biomass which simultaneously improves the quality of the processed biomass for production of fertilizer, feed or fuel. (C) 2016 Elsevier B.V. All rights reserved.

Item ID: 45525
Item Type: Article (Research - C1)
ISSN: 2211-9264
Keywords: seaweed, Ulvan, sea salt, aimal feed, biorefinery, aquaculture
Funders: Advanced Manufacturing Cooperative Research Centre (AMCRC)
Projects and Grants: MBD Energy Research and Development program for Biological Carbon Capture and Storage, AMCRC DP109602
Date Deposited: 08 Jun 2016 07:31
FoR Codes: 10 TECHNOLOGY > 1003 Industrial Biotechnology > 100302 Bioprocessing, Bioproduction and Bioproducts @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 25%
06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060701 Phycology (incl Marine Grasses) @ 25%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830199 Fisheries - Aquaculture not elsewhere classified @ 20%
86 MANUFACTURING > 8601 Processed Food Products and Beverages (excl. Dairy Products) > 860105 Nutraceuticals and Functional Foods @ 40%
82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8203 Industrial Crops > 820399 Industrial Crops not elsewhere classified @ 40%
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