1. Faculty of Chemical Engineering, Postgraduate Department, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
2. Faculty of Chemical Engineering, Chemical & Process Deparment, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
3. Faculty of Chemical Engineering, Chemical & Bioprocess Department, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia