Decolorization of Raw Cane Sugar Syrup by using Activated Carbon Made from Sugarcane Bagasse
| dc.contributor.advisor | Beteley, Tekola (PhD) | |
| dc.contributor.author | Mebt, Kibret | |
| dc.date.accessioned | 2020-12-05T09:35:36Z | |
| dc.date.accessioned | 2023-11-10T14:58:19Z | |
| dc.date.available | 2020-12-05T09:35:36Z | |
| dc.date.available | 2023-11-10T14:58:19Z | |
| dc.date.issued | 2019-06 | |
| dc.description.abstract | Activated carbon is used in sugar industries for the removal of colorants from sugar liquor. It is also used for treatment of potable water as well as industrial wastewater. Coal is a commercially used activated carbon, which is a limited non-renewable resource. However, there are different renewable resources such as sugarcane bagasse, peanut shells, rice husk, rice straw, coconut shells, which could be used as alternatives. The aims of this study were to decolorize raw cane sugar by using activated carbons prepared from renewable low cost sugarcane bagasse (SCB) and to investigate the effects of reagent to precursor ratio and activation temperature on decolorization efficiency. SCB was ground to the desired particle size, screened and characterized for powdered activated carbons (PAC) preparation. Sodium hydroxide (NaOH) at 0.25:1.0 and 0.5:1.0 impregnation ratio (IR-reagent to precursor) was used as an activating agent. The carbons were prepared in a carbonization process in an inert environment with a nitrogen gas flow rate of 0.2 l/min at temperatures of 500°C and 600°C for three hours. Using the same temperature and activation time but without reagent, bio-chars were also prepared for control and reference purpose to compare and contrast effects of reagent on prepared carbons properties and adsorption efficiency. The prepared carbons were characterized for their proximate and surface properties. Carbon yield, amount of burn off and bulk density were also determined for each sample of prepared carbons. Decolorization efficiency of each carbon was batch tested using ICUMSA method. The effects of carbon dose, raw sugar solution (syrup) concentration, solution temperature, and adsorption time on decolorization efficiency were studied in this experiment. The adsorbent prepared at a temperature of 600°C and 0.5:1.0 IR gave the best quality with respect to carbon yield (25.5204 %), bulk density (0.4022g/ml) and decolorization efficiency (56 %). The second best quality adsorbent, in terms of these parameters, was the carbon prepared at 5000C with the same IR having the results of 29.9081 %, 0.4028 g/ml and 40 % respectively. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/23861 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Activated carbon | en_US |
| dc.subject | Raw sugar syrup decolorization | en_US |
| dc.subject | Sugarcane bagasse | en_US |
| dc.title | Decolorization of Raw Cane Sugar Syrup by using Activated Carbon Made from Sugarcane Bagasse | en_US |
| dc.type | Thesis | en_US |