Application of ash from palm oil industry as adsorbent of food dyes | |
| Author | Thiraphon Sumongkhon |
| Call Number | AIT Thesis no.FB-12-11 |
| Subject(s) | Palm-oil Sewage--Purification Adsorption |
| Note | A thesis submitted in partial fulfillment of the requirements for the degreeof Master of EngineeringFood Engineering and Bioprocess Technology, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. no. FB-12-11 |
| Abstract | This research have the purpose which was analysis the using oil palm ash as adsorbent of residual food dyes in the waste water after processing from the average and food industries. This research was divided into four objectives. First of all, the chemical and physical properties of oil palm ash were analyzed by using sieve analyzer, surface area analyzer, scanning electron microscope, X-ray and fluorescence spectrometer. The physical properties such as particle size, porosity have been determined. From the chemical characterization it was found that the ash samples were enriched predominantly in silicon dioxide (SiO2), Potassium oxide (K2O) and Calcium oxide (CaO). The particles are almost spherical in shape at the range between 200-300 μm and the porous in nature. Secondly, the batch process was used to determine the effect of initial food dyes, temperature and pH at various conditions. The dose of oil palm ash was six levels at 10-60 g/0.1L. The results showed that the highest percentage of food dye removal were 95.49, 91.93 and 89.52 for Sunset Yellow, Brilliant Blue and Caimoisine, respectively. Four initial concentrations of food dyes were 0.7, 05, 0.3 and 0.1mg/L. It was found that the higher concentration has resulted in the increasing adsorption capacity from 0.00019 to 0.00117 mg/g. The effect of temperature was studied at 30 ̊C, 40 ̊C and 50 ̊C. It appears that higher temperature reduced the adsorption capacity from 0.00084 to 0.00097 mg/g. The linear relationship of temperature was k= -3.473-e(17.803/T). From this relationship, the adsorption capacities at other temperature can be predicted. The acidic pH from 1-4 was favorable for the adsorption of three food dyes. Langmuir and Freundlish equations were fitted to the data from this experiment. The R2for the pseudo-first-order and pseudo-second-order kinetic model were about 0.96-0.99 for all of food dyes. In the continuous process part, two effects were studied: bed depth, flow rate. The flow rate effect was investigated in 1.67, 2.5 and 3.33 ml/min with bed depth at 20 cm. The breakthrough time (tb) occurred at 330, 270 and 230 minutes for flow rates which were 1.67, 2.5 and 3.33 mL/min. The adsorption capacity at 1.67, 2.5 and 3.33 ml/min were not significantly different (p<0.01). An increasing in flow rate decreased the breakthrough time but the adsorption adsorption capacities were constant. The effect of bed depth were studied at the flow rate 2.5 ml/min at different bed depths i.e. 5,10 and 20 cm. The relationship between time and C/C0was ‘S’ shape for systems with a favorable isotherm that shape called the same breakthrough characteristic curves. The breakthrough time increased with the increase in bed depth. Moreover, the adsorption capacities were not significantly different (p<0.01). |
| Year | 2012 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. no. FB-12-11 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Food Engineering and Bioprocess Technology (FB) |
| Chairperson(s) | Anal, Anil Kumar; |
| Examination Committee(s) | Athapol Noomhorm;Rakshit, Sudip Kumar; |
| Scholarship Donor(s) | Royal Thai Goverment Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2012 |