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Evaluate the nutritional composition, digestibility, and supplemental feeding value of microalgae grown on sewage for ruminants and swine.

August 1, 1966Journal of Animal Science

Nutritive Value of Algae Grown on Sewage2

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Evaluate the nutritional composition, digestibility, and supplemental feeding value of microalgae grown on sewage for ruminants and swine.
Harvested predominant sewage-grown algae species (Chlorella spp., Scenedesmus obliquus, and S. quadricauda) across seasons and pelleted them with feed to ensure intake.
Evaluated crude protein digestibility and digestible energy in cattle, sheep, and pigs.
Conducted comparative feeding trials evaluating algae-barley rations in growing-finishing pigs and alfalfa-algae pellets in lambs on dry summer range.
Algae contained 51% crude protein, which exhibited 73% digestibility in cattle and sheep (yielding 2.6 kcal/gm digestible energy) compared to 54% digestibility in pigs.
Two feeding trials showed that algae supplied sufficient protein to supplement barley for growing-finishing pigs.
Alfalfa-algae pellets produced higher weight gains in lambs on dry summer range than alfalfa pellets alone, though high ash content and low nonprotein digestibility limited total energy.

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Implication

Feeding trials demonstrate that sewage-grown algae provide digestible protein and improve weight gain in livestock, highlighting their potential as a sustainable supplemental feed.

Cite This Study

Hintz et al. (1966) studied this question.

synapsesocial.com/papers/6a92e21fcfe2d75514a61725 https://doi.org/10.2527/jas1966.253675x

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Implication

Feeding trials demonstrate that sewage-grown algae provide digestible protein and improve weight gain in livestock, highlighting their potential as a sustainable supplemental feed.

Nutritive Value of Algae Grown on Sewage2

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Nutritive Value of Algae Grown on Sewage2

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Implication

Cite This Study

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