Added Value of Ascophyllum nodosum Side Stream Utilization during Seaweed Meal Processing

Abstract

Ascophyllum nodosum contains many valuable compounds, including polyphenols, peptides, and carotenoids that have been shown to exhibit biological activities. These compounds are not a priority ingredient in seaweed meal products for the current users. Hence, the aim of the study was to investigate the chemical and bioactive characteristics of A. nodosum as affected by seasonal variation and evaluate the potential benefits of alternative processing and the utilization of side streams for product development. The analysis of raw materials, press liquid, and press cake from alternative processing and the commercial seaweed meal at different harvesting periods indicated that the chemical composition is linked to the reproductive state of the algae. Phenolic content and ORAC activity increased following the seaweed’s fertile period, making alternative processing more promising in July and October compared to June. Several valuable ingredients were obtained in the press liquid, including polyphenols, which can be used in the development of new high-value bioactive products. The suggested alternative processing does not have a negative effect on the composition and quality of the current seaweed meal products. Hence, the extraction of valuable ingredients from the fresh biomass during the processing of seaweed meal could be a feasible option to increase the value and sustainability of seaweed processing.

Different Responses to Adventitious Rhizogenesis under Indole-3-Butyric Acid and Seaweed Extracts in Ornamental’s Cuttings: First Results in Photinia x fraseri ‘Red Robin’

“…Seaweed-extract based biostimulants [28], particularly from the brown alga Ascophyllum nodosum (L.) Le Jolis [29,30], commonly used in the agriculture industry, have been observed to be beneficial for plants because of the cell signaling activity of some molecules, such as polysaccharides [24,31,32], polyphenols, peptides, carotenoids [33], betaines [34], and macro-and micronutrients. Moreover, phytohormones (e.g., auxins, gibberellins and cytokinins), found in seaweed extracts, accelerate metabolism and development [35,36], as well as other hormone-like substances [37][38][39].…”

Ascophyllum nodosum (Linnaeus) Le Jolis from Arctic: Its Biochemical Composition, Antiradical Potential, and Human Health Risk

“…During summer and autumn, brown seaweed is known to accumulate carbohydrates and mannitol, with levels decreasing in winter [46,47]. A study conducted on fresh seaweed samples from Thorverk (Iceland) found that the mannitol content was significantly lower in June (7.1 ± 0.3% DW) compared to July and October [48].…”

“…Laminaran is the principal reserve polysaccharide and is composed of β-glucan [46]. Algae produce more laminaran during winter to survive when photosynthesis is limited [47,48]. The amount of laminaran present in algae depends on various factors such as the species of algae, growth phases, and the method of extraction used.…”

Nutritional and Antioxidative Benefits of Dietary Macroalgae Supplementation in Weaned Piglets

“…Macroalgae, commonly referred to as seaweed, are plant-like organisms divided into three primary groups based on pigmentation: brown seaweed (Phaeophyceae), red seaweed (Rhodophyceae), and green seaweed (Chlorophyceae) [1]. Seaweed, with its extensive taxonomic diversity, is a significant source of bioactive substances.…”

“…Notably, the chemical compounds in macroalgae with anti-inflammatory potential do not exhibit the side effects often associated with non-steroidal anti-inflammatory drugs [2]. Macroalgae are also valued as food additives due to their rich content of carbohydrates, polyphenols, peptides, carotenoids, vitamins, minerals, and a balanced presence of n-3 and n-6 polyunsaturated fatty acids (PUFA) [1]. The brown hue of Ascophyllum nodosum is primarily due to its high carotenoid fucoxanthin content, which overshadows other pigments like β-carotene, violaxanthin, diatoxanthin, and chlorophyll.…”