Determination of Optimum Condition for the Production of Commercially Viable Glue from Tannery Solid Waste
No Thumbnail Available
Date
2011-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Glues are an adhesive which are collected by persistent boiling of animal skin, hide trimmings
and flesh from the slaughter houses. They can also be gathered from the scrap of animal skin and
hide residues of leather industry. This study was aimed at determining the optimum condition for
the production of high quality glue from tannery solid waste. In other word, the effect of type of
reagents used (such as lime and sulfuric acid), concentration of reagents, boiling time, soaking
time and boiling temperature were investigated. The pelt was treated with 2.5% and 10 %
concentration of reagents. Under sulfuric acid solution the pelt was soaked overnight and boiled
for 2 and 4 hrs at 70oC and 80oC, whereas it was kept for 2 and 4 weeks under lime solution and
boiled for about 4 hrs at 70oC and 80oC. Generally, the glue produced by using lime showed
relatively high quality than the one produced from sulfuric acid. It was possible to extract high
amount of glue within a short period of time from sulfuric acid treated pelt as compared to lime
treated one. Under lime medium, the adhesive strength of glue was increased with the
concentration and soaking time and decrease with temperature. Soaking of the pelt, in 10% lime
solution, for 4 weeks and boiling at 70oC were found to be the optimum conditions for the
production of commercially viable glue. At this condition, the viscosity, yield and mass of
residue was 255.05 mP, 0.1357g / g of pelt and 0.32287 g/ g of pelt, respectively. The economic
feasibility study, carried out in this work, showed that the project is to be financially viable with
the rate of return of the project 27.9%, the payback period of 3.08 year and the net present value
of 40,036,155.25 birr.
Key word: Glue, Protein, Quality, Tannery solid waste and viscosity
Description
Keywords
Glue; Protein; Quality; Tannery solid waste and viscosity