2026-05-06T00:02:18Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/636782025-01-13T07:55:20Zcom_10324_1137com_10324_931com_10324_894col_10324_1222

00925njm 22002777a 4500 dc González García, Isabel author Riaño, Berta author Molinuevo Salces, Beatriz author García González, María Cruz author 2023 Nutrient recovery from the agri-food sector waste is an increasingly recognized option within the framework of the bioeconomy. Membrane technologies and chemical precipitation are among the best valued options for their economic and practical feasibility. In this study, the combination of gas-permeable membrane (GPM) technology for the recovery of nitrogen (N) and the chemical precipitation for phosphorous (P) recovery from anaerobically digested swine manure is evaluated. This work studies the effect of the membrane area and the addition of alkali on N and P recovery efficiencies. Specifically, two different membrane area ratios (180 and 100 g of N per m2 of membrane) with and without the addition of alkali were studied. High nutrient recovery efficiencies, of 77% for N and 80% for P, were obtained after 10 days of experiment with a ratio of 180 g N per m2 of GPM and the addition of NaOH (1.5 N), along with the precipitant agent (MgCl2) for P precipitation. Hence, a combined configuration was proposed to perform an effective simultaneous recovery of N and P with the minimum amount of membrane needed in a short time. Sustainability, 2023, Vol. 15, Nº. 5, 3909 2071-1050 https://uvadoc.uva.es/handle/10324/63678 10.3390/su15053909 3909 5 Sustainability 15 2071-1050 Vaste valorization Tratamiento de desechos Organic wastes - Recycling Residuos orgánicos - Reciclaje Agricultural wastes - Recycling Residuos agrícolas - Reciclaje Ammonia Amoniaco Phosphates Fosfatos Gas separation membranes Gases - Separation Circular economy Economía circular Sustainability Sustainable development Sostenibilidad Desarrollo sostenible Renewable energy resources Energías renovables Effect of alkali and membrane area on the simultaneous recovery of nitrogen and phosphorous from digestate by membrane technology and chemical precipitation