A. Nur Hidayah
School of Environmental Engineering, University Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.

School of Environmental Engineering, University Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.

M.A. Umi Fazara
* Corresponding Author
School of Environmental Engineering, University Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.

School of Environmental Engineering, University Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia.

Z. Nor Fauziah
Faculty of Engineering Technology, University Malaysia Perlis, Engineering Centre, 1st floor, Administration Building, Pauh Putra Main Campus, 02600 Arau, Perlis.

Faculty of Engineering Technology, University Malaysia Perlis, Engineering Centre, 1st floor, Administration Building, Pauh Putra Main Campus, 02600 Arau, Perlis.

M.K. Aroua
Chemical Engineering Department, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.

Chemical Engineering Department, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.