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| dc.contributor.author | Seyfe, Asfaw | |
| dc.date.accessioned | 2024-02-01T11:03:37Z | |
| dc.date.available | 2024-02-01T11:03:37Z | |
| dc.date.issued | 2023-05 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/15610 | |
| dc.description.abstract | Ion-exchange water softener used in commercial and industrial applications to reduce hardness. The water is passed through a negatively-charged resin initially containing sodium ions in the softening cycle, after avoid a sufficient quantity of hardness ions, regeneration of the resin back to sodium ion form is required. Regeneration involves contacting the resin bed with concentrated sodium chloride (NaCl) solution. The key objectives of this study is to increase the shelf life of IEX sulfonated resine using the lpcal salt to provide a highly concentrated and purified NaCl solution that is fed to the softener regeneration step on the selected industry. Experimental work was conducted by using chemical treatment process, the chemicals used in this process were sodium hydroxide, sodium carbonate, and barium chloride. The result from the purification proce ss depends on the rate of reaction between the chemical used to treat salt impurities & its precipitation. Response surface methodology based on CCD was employed to study the influence of variables and to optimize the improved response Variables (Mg(OH) 2, CaCO 3 , total alkalinity & purity). A response surface methodology was used to evaluate the effect of varibles (NaOH concentration, Na2CO3 concentration, BaCl2 concentration, temperature and time on the response variables i.e. Mg(OH)2,CaCO 3 , total alkalinity purity and on the IEX regeneration the hardness leakage, treatement capacity . The ANOVA result for all responses showed that the significance of all variables (P< 0.05) showing that the model accurately includes most of the data in quadratic polynomial regression. The newly developed approach was developed that integrates all parameters (NaOH, Na 2CO3 , BaCl2, temperature and time) on optimization constraints. The optimization goal w ere obtaining responses with a low Mg(OH) 2, low CaCO 3 , low total alkalinity and high Purity and on the hand IEX regeneration the hardness leakage, treatement capacity. The optimal value were Mg(OH)2, CaCO 3 , Total alkalinity and Purity values and on the IEX regeneration using treated afdera brine low leakage (Co/C) & high Treatment capacity (BVs) values of 0.081 mg/L, 0.050 mg/L, 0.116 mg/L, 98.52% ,67.09 % and 10.67 % respectively. Key words: Ion exchange, NaCl,Water Softener, Response Surface Method, Central Composite Design. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Chemical and Food Engineering | en_US |
| dc.title | Treatment of Ion Exchanger Brine Regenerator for Reuse: A Case Study of Yes Brands Food and Beverage PLC | en_US |
| dc.type | Thesis | en_US |
