Effectiveness of Organic Fertilizer Produced from Tannery Buffing Waste

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dc.contributor.authorNAMANTHA, S.A.D.
dc.date.accessioned2021-10-12T04:49:57Z
dc.date.available2021-10-12T04:49:57Z
dc.date.issued2014
dc.description.abstractBuffing dust is Chromium containing solid waste generated during the leather processing which is considered to be a hazardous material and therefore, a proper treatment before discarding to environment is vital. Dechroming process eliminates the potential toxic Chromium (Cr+6) to non- toxic form (Cr+3) through chemical hydrolysis. Therefore, this study was carried out to develop an organic fertilizer from the buffing dust and study the effectiveness on Radish (Raphanus sativus L.) growth. Trials were conducted at Ceylon Leather Products PLC and in an experimental field located at Kaduwela, Colombo. Collected samples of buffing dust (3 kg) were subjected to chemical hydrolysis consisted of four steps and conditions for each step were optimized as follows, (20 g/10 L sodium hydroxide and 400 g/10 L urea for 0.5 h at 40°C, 500 g/10 L sulfuric acid solution for 1 h at 40°C, 400 g/10 L CaC2 suspension for 2 h at 30°C and 500 g/10 L sulfuric acid solution for 1 h at 30°C). The final product was characterized by peptide and free amino acids and Cr' level was estimated using Atomic Absorption Spectrophotometry as 365.1 ppm. Field trials were conducted against Radish (Raphanus sativus L.) with four treatments of developed fertilizer (15, 30, 45 and 60 g,) and positive and negative controls under Completely Randomized Design. Vegetative growth (number of leaves, plant height, and leaf length) were measured in weekly interval. Results revealed that 60 g fertilizer mixture showed significantly (P<0.05) higher vegetative growth; number of leaves (7.0±1.4), plant height (18.8±4.3 cm) and leaf length (9.8±2.4 cm) compared to other treatments and control groups. Results concluded that buffing waste can be simply converted to an organic fertilizer and effectively used to enhance the plant's vegetative growth which might finally reduce the possible environmental hazards due to improper discards of Cr tannery waste. Key words: Buffing waste, Radish (Raphanus sativus L.), Chromium, Organic fertilizeren_US
dc.identifier.otherUWU/ANS/14/0022
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/7240/ANS%2014%20022-17022021120634.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;UWU/ANS/14/0022
dc.subjectAnimal Science Degree Programme (ANS)en_US
dc.titleEffectiveness of Organic Fertilizer Produced from Tannery Buffing Wasteen_US
dc.title.alternativeResearch Article – ANS 2014en_US
dc.typeThesisen_US
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