Autoria: MIGNONI, D. S. B.; ZENATTI, A. P.; STRADIOTO, G. C.; NIVA, C. C.; MATTHIENSEN, A.; LUCHESSI, A. D.; NUNES, E. de O.

Resumo: Floating aquatic macrophytes, commonly known as “duckweeds” are the smallest monocot angiosperms and form dense populations with genetically uniform clones. The high level of nutrients, particularly nitrogen (N) and phosphorus (P), favors the development of these fast-growing plants with high biomass yield in aquatic ecosystems. In some Asian countries, they are vegetal protein source to several kinds of food for animals and humans. This study evaluated the yields (fresh and dry) and some nutritional properties from duckweeds biomass: Landoltia punctata and Wolffia brasiliensis grown (individually) for 20 days in a pilot-scale batch reactor using complex nutrient medium swine wastewater based. For acclimatization and density build-up, the biomass was maintained for 4 to 5 days in a restrict space (?10% of the reactor area), followed by gradual expansion. After 20 days of cultivation, the total biomass was collected, drained and dried. The yields in fresh weight were to Landoltia of 7,000 and to Wolffia 4,300 kg.ha -1 ; crude protein, 30 and 27%; carbohydrates, 35 and 33 %, respectively. Biomass production shows to be satisfactory, kinetic studies of growth and conversion of substrate into product will improve the yield and compositional selectivity of the biomass, in order to establish good management and cultivation practices.

Ano de publicação: 2024

Tipo de publicação: Artigo em anais e proceedings

Unidade: Embrapa Suínos e Aves

Palavras-chave: Biomassa vegetal, Biotechnological process, Macrophytes, Macrófita, Nutrition, Nutrição, Processo biotecnológico, Suinocultura, Vegetal biomass, Águas Residuais