1. Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia
2. The Vetiver Network International, Asia and Oceania, Brisbane 4069, Australia
3. Malaysian Palm Oil Board (MPOB), Agro Product Unit, Engineering and Processing Division, Jalan Sekolah, Pekan Bangi Lama, 43000 Kajang, Selangor, Malaysia
4. Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia
5. Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia