Recycling of solid waste rich in organic nitrogen from leather industry: Mineral nutrition of rice plants

• Published in: Journal of hazardous materials Vol. 186; no. 2-3; pp. 1064 - 1069
• Main Authors: Nogueira, Francisco G.E., Castro, Isabela A., Bastos, Ana R.R., Souza, Guilherme A., de Carvalho, Janice G., Oliveira, Luiz C.A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 28.02.2011; Elsevier
• Subjects: Applied sciences; Chromium; Chromium - chemistry; Collagen; Enrichment; Exact sciences and technology; Fertilizers; Formulations; greenhouses; Industrial Waste; Leather; leather industry; Leather waste; Microscopy, Electron, Scanning; Mineral nutrition; Minerals; Minerals - metabolism; nitrogen; Nitrogen - analysis; nitrogen content; nutrition; Nutritional Physiological Phenomena; Oryza - growth & development; Oryza - physiology; Oryza sativa; Phosphorus - chemistry; Plant Shoots - growth & development; Plant Shoots - physiology; Plants (organisms); Pollution; Potassium - chemistry; recycling; Recycling - methods; Refuse Disposal - methods; Rice; Rice plants; Solid wastes; Tanning; urea; Wet blue leather; Leather waste; Mineral nutrition; Rice plants; Collagen; Leather industry; Solid waste; Agriculture; Recycling; Nitrogen
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2010.11.111

The leather industry produces a large quantity of solid waste (wet blue leather), which contains a high amount of chromium. After its removal from wet blue leather, a solid collagenic material is recovered, containing high nitrogen levels, which can be used as a nitrogen source in agriculture. In order to take more advantage of the collagen, it was enriched with mineral P and K in order to produce NPK formulations. The objective was also to evaluate the efficiency of such formulations as a nutrient supply for rice plants in an Oxisoil, under greenhouse conditions. The application of PK enriched-collagen formulations resulted in N contents in the vegetative parts and grains of rice plants which were equivalent or superior to those obtained with urea and commercial NPK formulations.