Development of a Continuous-flow Light Emitting Diode (LED) Pasteurization System for Liquid Foods | |
| Author | Abeysinghe, Udayanga Sampath |
| Call Number | AIT Caps. Proj. no.BSE-16-09 |
| Subject(s) | Light emitting diode Pasteurization Cyclic voltammetry Photodynamic inactivation |
| Note | A capstone project report submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Engineering Biosystems Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Caps. Proj. ; no. BSE-16-09 |
| Abstract | Worldwide, interest is growing in the development and use of non-thermal food processing technologies as processes that can be applied successfully throughout the liquid food supply chain from ingredients to finished products. The main driver for companies implementing some of these emerging food safety technologies is the assurance of microbial reduction on their products at different steps of production but also the resulting higher quality of the foods produced. Main development done this project was developing a continuous-flow LED pasteurization system. All parameters checked for both LED pasteurized and Control sample. Total plate count for microbial content, cyclic voltammetry method for Vitamin C content, Color content using colorimeter, Temperature profile using data logger, Total phenolic content using Folin-Ciocalteu colorimetric method and pH values using pH meter. Project conducted for up to 7.5h and samples took for 1.5h, 3.0h, 4.5h, and 6.0h. For microbial reduction recorded 1.41 log CFU/ml reduction after 7.5h. After 7.5h vitamin C content measured as 3.73 mmol.L-1 . Color degradation reported as 76.69 (Total color difference). Using LED doesn’t have any effect on pH value. Total phenolic content have reduced 0.398 mg GAE/ml after 7.5h. According to results LED pasteurization way better than thermal pasteurization in many ways. But in some cases it’s not good as much as thermal pasteurization. By changing some designing of illumination area of reactor can overcome those problems and can gain more efficient results. |
| Keyword | Light emitting diode; Pasteurization; Photodynamic inactivation; Cyclic voltammetry; Total phenolic content; Bacterial inactivation |
| Year | 2016 |
| Corresponding Series Added Entry | Asian Institute of Technology. Caps. Proj. ; no. BSE-16-09 |
| Type | Capstone Project |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Bachelor of Science in Engineering Biosystems Engineering (BSE) |
| Chairperson(s) | Loc Thai Nguyen; |
| Examination Committee(s) | Datta, Avishek;Anal, Anil Kumar;Soni, Peeyush; |
| Degree | Capstone Project (B.Sc.)-Asian Institute of Technology, 2016 |