Environmental Technology Division;
School of Industrial Technology;
Universiti Sains Malaysia;
Pulau Pinang;
Malaysia;
School of Civil Engineering;
Universiti Sains Malaysia;
Engineering Campus;
Seri Ampangan;
Pulau Pinang;
Malaysia;
Chemical; Oxygen; Demand; Natural; Coagulant; Response; Surface; Methodology; Semiconductor; Tapioca; Turbidity;