1. Bioresource Engineering Research Group, Department of Chemical Engineering, Faculty of Engineering and the Built Environment, Cape Peninsula University of Technology, P.O. Box 652, Cape Town 8000, South Africa
2. Academic Support Programme for Engineering in Cape Town (ASPECT), Centre for Higher Education Development, University of Cape Town, Rondebosch, Cape Town 7700, South Africa
3. Department of Food Science and Technology, Cape Peninsula University of Technology, Bellville 7535, South Africa
4. Faculty of Engineering, the Built Environment, and Technology, Nelson Mandela University, Gqeberha 6001, South Africa