Abstract This research aims to test the effectiveness of chitosan flakes affecting wastewater treatment. The waste water is a mixture of three types of fuel oil and lubricating oil used in the experiment. Test the effectiveness of chitosan flakes by monitoring physical characteristics. The observed turbidity, color and odor as well as checking the chemical characteristics. The measure acidity (pH) of water with a mixture of three types of fat. Before and after experimenting with chitosan flakes of 1 g 2 g and 3 g of water and oil, three kinds mixed in a ratio of 1: 1, 2: 1 and 3: 1 found that water quality improved. Treatment with chitosan flakes are the acidity (pH) more neutral. There are three types of fat and decreased markedly. The study found that the scale of chitosan used in the trial effectively is chitosan flakes 3 grams is a minor scale of chitosan dose of 2 g and 1 g, respectively, and the ratio of water. and three kinds of fuel efficient in most trials, the ratio of 3: 1, followed by the ratio of 2: 1 and 1: 1 respectively.
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