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Master Thesis

Valorisation de digestat issu de biodéchets urbains comme intrant en hydroponie organique

Abstract : This report provides the potential of a liquid digestate through solid-state fermentation, as a liquid fertilizer within DECISIVE2020 project. The effect of digestate were compared with two conventional fertilizers, organic and mineral, in a hydroponic system with lettuces (Lactuca sativa). For each fertilizer, nutrients properties were analysed, and so their effect on lettuce growth and quality. Lettuces nutrient, qualitative and quantitative analyses were considered to see if liquid digestate can be used as a fertilizer, and if it is rather closer to mineral fertilizer than to organic fertilizer. Lettuce nutrients were compared to references to see excess or deficiencies for some of them. Lettuce nutrients with liquid digestate with higher electroconductivity (EC) is close to organic fertilizer in terms of excess, and the one with the lower EC is close to the mineral fertilizer in terms of deficiencies. Deficiencies and excesses affect lettuces. Indeed, the lettuce quality for digestate modalities was lower than the other treatments but the difference is not as marked, which might need further trial improvements.
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Master Thesis
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Submitted on : Friday, November 29, 2019 - 2:58:08 PM
Last modification on : Monday, July 6, 2020 - 3:38:27 PM

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Elen Lefeuvre. Valorisation de digestat issu de biodéchets urbains comme intrant en hydroponie organique. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02386866⟩

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