Fertiliser effect of ammonia recovered from anaerobically digested orange peel using gas-permeable membranes.

article

Monteiro, M.C.H.
Riaño, Berta
Anjos, O.
García-González, María Cruz

MDPI

Horta, M.C.; Riaño, B.; Anjos, O.; García-González, M.C. (2022) - Fertiliser effect of ammonia recovered from anaerobically digested orange peel using gas-permeable membranes. Sustainability. ISSN 2071-1050. 14, 7832 (15 p.).

2071-1050

10.3390/su14137832

Fertiliser effect of ammonia recovered from anaerobically digested orange peel using gas-permeable membranes.

Bio-based fertiliser
FT-Raman
Nitrogen fertiliser replacement value
Orange bio-waste
Plant biostimulant

2022-07-18T10:46:19Z
2022-07-18T10:46:19Z
2022

Themanufacture ofmineralNfertilisers by theHaber–Bosch process is highly energy-consuming. The nutrient recovery technologies from wastes through low-cost processes will improve the sustainability of the agricultural systems. This work aimed to assess the suitability of the gas-permeable membrane (GPM) technology to recover N from an anaerobic digestate and test the agronomic behaviour of the ammonium sulphate solution (ASS) obtained. About 62% of the total ammonia nitrogen removed from digestate using GPM was recovered, producing an ASS with 14,889 +/- 2324 mg N L-1, which was more than six-fold higher than in digestate. The ASS agronomic behaviour was evaluated by a pot experiment with triticale as a plant test for 34 days in a growth chamber. Compared with the triticale fertilised with the Hoagland solution (Hoag), the ASS provided significantly higher biomass production (+29% dry matter), N uptake (+22%), and higher N agronomic efficiency 3.80 compared with 1.81 mg DM mg-1N in Hoag, and a nitrogen fertiliser replacement value of 133%. These increases can be due to a biostimulant effect provided by the organic compounds of the ASS as assessed by the FT-Raman spectroscopy. The ASS can be considered a bio-based mineral N fertiliser with a biostimulant effect.
info:eu-repo/semantics/publishedVersion

openAccess
http://creativecommons.org/licenses/by/4.0/

eng