4.8 Article

Sustainable aquaculture and animal feed from microalgae-Nutritive value and techno-functional components

Journal

RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume 150, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.rser.2021.111549

Keywords

Microalgae; Animal feed; Aquaculture feed; Astaxanthin; Antioxidant; Prebiotic

Funding

  1. Taiwan's Ministry of Science and Technology (MOST) [109-2811-E-002-532, 109-3116-F-006-016-CC1, 109-2218-E-006-015, 107-2221-E-006-112-MY3]

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Microalgae are promoted as a sustainable feed option with high nutritional quality, utilized in biofuel production and bioremediation. They offer advantages of protein, carbohydrates, fats, vitamins, and minerals, but quality assessments such as digestibility, bioavailability, and toxicity must be considered. Their utilization in animal husbandry and aquaculture sectors, along with potential future research prospects, are highlighted.
Microalgae are being promoted as a superior alternative feedstock for sustainable biofuel production and recently they are also being increasingly recognized as phytoremediation agents in bioremediation. Other than these, microalgae have been utilized as a sustainable feed in aquaculture for many years. The success of microalgae as a feed is based on the nutritional quality of microalgae, which are rich in protein, carbohydrates, fats, vitamins, minerals, and other beneficial biologically active components such as carotenoids and polyunsaturated fatty acids. Standards for the evaluation of microalgae include the assessment of various qualities such as digestibility, bioavailability, and toxicity analysis. This review provides comprehensive information regarding the current status and desirable characteristics of microalgae as a feed ingredient. Feed quality assessments such as protein quality, toxicological and microbiological analysis for microalgae are discussed. The techno-functional components of microalgae are presented in the feed perspective. The utilization of microalgae in various animal husbandry sectors and aquaculture are summarized. The advantages - disadvantages of microalgae as a feed is also presented, along with future research prospects. In short, this review will provide an overall view of the nutritional quality of microalgae and its beneficial application as a sustainable feed ingredient.

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