Re-utilisation of biomass resources : preparation and application of an organic fertiliser based on waste cattle hair from tannery / Wang Yi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 2 (03-04/2021)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 2 (03-04/2021) . - p. 90-94 Titre : Re-utilisation of biomass resources : preparation and application of an organic fertiliser based on waste cattle hair from tannery Type de document : texte imprimé Auteurs : Wang Yi, Auteur ; Ouyang Mai, Auteur ; Luo Jianxun, Auteur ; Zhang Zhijie, Auteur ; Du Manyi, Auteur ; Wu Peijun, Auteur Année de publication : 2021 Article en page(s) : p. 90-94 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomasse Bisulfite de sodium Déchets organiques -- Recyclage Engrais organiques Fermentation Hydrolyse Hydroxyde de sodium L'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol. La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude. Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate. La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante. Recyclage (déchets, etc.) Système pileux Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to make effective use of cattle hair from a de-hairing process with hair-saving methods during the process of cleaner production in leather industry, complex oxidising materials (ammonium persulfate and hydrogen peroxide) were employed to oxidise and change the colour, structure of waste cattie hair. Then, sodium hydroxide and sodium bisulfite were employed to hydrolyse the de-coloured and de-structured cattle hair. The cattle hair hydrolysate was concentrated and was further fermented using a compound enzyme (neutral protease and pancreatin) so as to make it into an organic fertiliser. Comparing the colour and the structure of the cattle hair, the best conditions of the reaction temperature, the dosage of ammonium persulfate and hydrogen peroxide solution and reaction time for 20g dried cattle hair were confirmed to be 75°C, 4g, 9g and 60 minutes. when the dosage of sodium hydroxide, sodium bisulfite, and reaction time were 8g, 2g and 45 minutes, the hydrolysis rate of the cattle hair and the content of the cattle hair hydrolysate was 95.4% and 17.6%. The solids content of the concentrated cattle hair hydrolysate is 30.8%. when the fermenting conditions are those of 0.15% neutral protease, 0.15% pancreatin and 3 hours, the nitrogen content of the fermented liquid is 338.5mg/L and was prepared as an organic fertiliser that contributes to the growth of plants, which can realise the utilisation of waste cattle hair from the leather industry. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Oxidation of waste cattle hair from tannery - Hydrolysis of oxidised cattle hair and concentration of hydrolysate - Fermentation of the concentrated hydrolysate of waste cattle hair - Applicationof hydrolysate and fermentation liquor of waste cattle hair - RESULTS AND DISCUSSION : Analysis of oxidised waste cattle hair - Analysis of hydrolysis and concentration of waste cattle hair - Analysis of fermentation of concentrated hydrolysate of waste cattle hair - Analysis of the growth of plant using different fertilisers - Table 1 : Parameters of orthogonal experiment of oxidising waste cattie hair - Table 2 : Experimental scheme of oxidized experiment of waste cattle hair with (NH4)2S208 and F1202 - Table 3 : Parameters of orthogonal experiment of hydrolysing waste cattie hair - Table 4 : Experimental scheme of hydrolysis experiment of waste cattie hair with NaOH and NaHSO3 - Table 5 : Parameters of orthogonal experiment of fermenting the hydrolysate - Table 6 : Experimental scheme of fermentation experiment of concentrated hydrolysate - Table 7 : Results of oxidation experiment of waste cattie hair with (NH4)2S208 and H202 - Table 8 : Results of hydrolysis experiment of waste cattie hair with NaOH and NaHSO3 - Table 9 : Results of fermentation experiment of concentrated waste cattie hair hydrolysate - Fig. 1 : Appearance of waste cattle hair - Fig. 2 : Appearance of oxidised and decoloured cattle hair - Fig. 3 : SEM photograph of waste cattle hair - Fig. 4 : SEM photograph of oxidised and decoloured cattle hair - Fig. 5 : Photos of carrot growing for 30 days - Fig. 6 : Photos of lettuce growing for 20 days - Fig. 7 : Photos of pak choi groing for 15 days En ligne : https://drive.google.com/file/d/1RP9r9j4h5adBa3mNWkwzTfQloZAUlYUC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35547 [article]

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