Bio-organic fertilizer production from industrial waste and insightful analysis on release kinetics

• Published in: Journal of environmental management 2023-01, Vol.325, p.116378-116378, Article 116378
• Main Authors: Majee, Subhasish, Sarkar, Kalyan Kumar, Sarkhel, Rwiddhi, Halder, Gopinath, Mandal, Dalia Dasgupta, Rathinam, Navanietha Krishnaraj, Mandal, Tamal
• Format: Article
• Language: English
• Subjects: Chicken meat-bone meal; Collagenic material; NPK bio-Organic fertilizer; Rice husk ash; Wet blue leather
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2022.116378

The present study has been designed to utilize industrial and agricultural solid waste for NPK (Nitrogen–Phosphorus–Potassium) bio-organic fertilizer production and its optimized use. The collagenic material of wet blue leather (WBL) from leather industry was used as nitrogen source, after H3PO4 acid-mediated chromium removal. Chicken meat-bone meal (CMBM) and rice husk ash (RHA) are abundantly available locally, had used as P, K, and Ca sources. The presence of N, P, K, Ca in the produced bio-organic NPK fertilizer were 10.76, 11.03, 3.41, 13.64, respectively as per mixing ratio of ingredients. In this study it was effect on the chili plant (Capsicum annuum L.) growth and revealed 1.15 and 1.03 fold higher plant growth, 1.40 and 1.18 fold higher total chlorophyll content than untreated soil (control), and chemical fertilizer. The liberation of fertilizers components from their source, transport of fertilizer components in the soil, and absorption in plant roots have been studied using mathematical models indicating the optimum fertilizer use for better productivity and to reduce loss of extra fertilizer and eutrophication. The formulation showed excellent water retention capability (3.2 L/kg), which might increase soil water availability to the plants and eventually reduce water demand and labour cost. DNA intercalation study proved there is no harm to use this fertilizer. [Display omitted] •Wet blue leather, meat-bone and rice husk ash used as raw material of organic manure•Toxic chromium extracted from WBL by H3PO4 (1N) treatment•Formulated NPK bio-organic fertilizer characterized by SEM-EDS and FTIR•Liberation, diffusion and absorption of fertilizer studied using mathematical models•NPK bio-organic fertilizer showed significant growth on chili plant