The conventional treatment methods of tannery spent float is found to be not sufficient to meet the required international standers levels of liquid discharges on the other hand the establishment of the treatment unit for the physical, biological and chemical treatment of the spent float is found to be extremely high-cost process. During the life time of the tannery by using the recycling of the spent float method, there would be a great saving in the water and the chemicals as well as environment protection. The comparison of the capital cost estimates of two tanneries with the same capacity, one with the conventional treatment method (large treatment unit should be established) and the other used the recycling of the spent float process, show the advantages of using the recycling process over the conventional treatment process.
Cost–benefit analysis - Wikipedia.htm.Available at: https ://en.wikipedia.org/ wiki /Cost %E2%80%93benefit_analysis [Accessed 7 April. 2019.
KayodeCoker, A. (2007). Ludwig “s.Apllied process design for chemical and petro chemical plants.4th ed.Burlington:Gulf professional publishing,p.69.
Peter, M.S and Timmerhaus, K.D. (1991).Plant design and economic for chemical engineers.4th ed.Singapore:Mc Graw-Hill Book Co.
Sinnott, R.K. (2005). Chemical engineering design.6th ed.Chennai:Laserword private limited.
Hayes,A.(2019).gross profit.[online].investopedia. available at: https://www.investopedia .com/terms / g/grossprofit.asp [20/1/2020].
Wikibedia,(2019).net income. [online] available at: https://en.wikipedia.org /wiki/Net_ income. [21/1/2020].
Wikibedia,(2019).break-even (economics).[online] available at: https://en.wikipedia.org/ wiki/ Break-even_(economics).[22/1/2020].