Developing seaweed/macroalgae as feed for pigs

Mapping Intimacies ◽

10.19103/as.2021.0091.15 ◽

2021 ◽

pp. 229-254

Author(s):

Marta López-Alonso ◽

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Marco García-Vaquero ◽

Marta Miranda ◽

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...

Keyword(s):

Future Trends ◽

Animal Feeds ◽

Feed Production ◽

Macro And Micronutrients ◽

Promising Source

Macroalgae are a promising source of nutritional ingredients including proteins, polysaccharides and minerals. The need to increase animal and feed production has increased interest in macroalgae as underutilised resources with promising applications as alternative animal feeds. This chapter summarizes the nutritional attributes of macroalgae in terms of macro and micronutrients as a source of protein and other compounds in pig nutrition. The benefits of macroalgae or macroalgal derived extracts in feed are discussed together with future trends and challenges in the development of effective feed formulations.

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The formation of microbiots in the body of primates and the provision of their diets with a balanced ratio of macro- and micronutrients

E3S Web of Conferences ◽

10.1051/e3sconf/202128204015 ◽

2021 ◽

Vol 282 ◽

pp. 04015

Author(s):

N.V. Gaponov ◽

O.G. Loretts

Keyword(s):

Intestinal Microflora ◽

Economic Feasibility ◽

Point Of View ◽

The Body ◽

Feed Production ◽

Long Time ◽

Macro And Micronutrients ◽

Hematological And Biochemical Parameters ◽

The Cost ◽

Endogenous Synthesis

This article presents studies of the formation of symbiotic primitive microbionts and the balancing of macro- and micronutrients of their feeds. To date, more than 20 thousand diverse physiologically active macro- and micronutrients have been isolated and characterized from feed and food products. For a long time, it was believed that the only source of a large number of nutrients is only feed and food. However, experiments convincingly showed that the symbiotic intestinal microflora also takes an active part in the endogenous synthesis and recycling of many macro- and micronutrients. At the same time, the use of the probiotic complex Bactistatin and fish meal did not adversely affect the hematological and biochemical parameters of the blood of experimental monkeys, all indicators were within the physiological norm. And testing the experiment on a larger population, under conditions of enclosure, allowed to establish a reduction in the cost of feed and nutrients in experimental primates and to prove the economic feasibility of using the studied ingredients from the point of view of profitability of feed production and primate content.

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Waste Is the New Wealth – Recovering Resources From Poultry Wastewater for Multifunctional Microalgae Feedstock

Frontiers in Environmental Science ◽

10.3389/fenvs.2021.679917 ◽

2021 ◽

Vol 9 ◽

Author(s):

Eli S. J. Thoré ◽

Floris Schoeters ◽

Audrey De Cuyper ◽

Rut Vleugels ◽

Isabelle Noyens ◽

...

Keyword(s):

Animal Feed ◽

Tap Water ◽

Critical Role ◽

Sustainable Use ◽

Algal Growth ◽

Microalgal Biomass ◽

Feed Production ◽

Microalgae Biomass ◽

Poultry Wastewater ◽

Promising Source

To meet the increasing demands of the growing population and to cope with the challenges of global change, both the production of biological feedstock and the recovery of recyclable natural resources play a critical role. Microalgal biomass is a promising source of renewable multifunctional feedstock, but the production is costly and requires large amounts of water. Here, we explored the potential of using wastewater as culture medium to lower the economic and environmental costs of microalgae biomass production and evaluated its valorization opportunities for animal feed production. As a proof of principle, we show that Chlorella sorokiniana can be cultivated on poultry wastewater, with a 83 and 113% increase in productivity when wastewater was first 50% diluted with tap water or standard growth medium, respectively. Wastewater sterilization before use enhanced algal growth with 36–118%, but only when wastewater was 25–50% diluted with standard medium. In contrast, it offered no additional benefits when dilutions were made with tap water or when wastewater was not diluted. At the end of the 22-days experiment, a maximum biomass of 0.8–1.9 g L−1 was reached for algae grown on wastewater. The produced biomass had a high macronutrient content, and the heavy metal content was below maximum limits for use in animal feed. Likewise, the tested pathogen groups were reduced until below safety norms for feed production after algal growth in unsterilized 50% wastewater (diluted with tap water). Overall, these findings add to our growing knowledge on the cultivation of microalgae on wastewater and its valorization opportunities, paving the way for a more sustainable use and reuse of resources.

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