Journal of Science and Technology 54 (4B) (2016) 277-284 TREATMENT EFFECTIVENESS EVALUATION OF WASTEWATER FROM INDUSTRIAL FRIED CHICKEN RE- PROCESSING PROCESSES BY ADVANCED OXIDATION PROCESSES Nguyen Dien Chau 1 , Nguyen Thanh Luan 2 , Thai Phuong Vu 3 1 College of the Environment and Natural Resources,University of Cantho, Campus II, 3/2 treet, Xuan Khanh ward, Ninh Kieu district, Cantho city, Vietnam 2 Institute of Tropicalization and Environment, Academy of Military Science and Technology, 57A, Truong Quoc Dung street, Ward 10, Phu Nhuan district, Ho Chi Minh city, Vietnam 3 University of Natural Resources and Environment in Ho Chi Minh city, 236B Le Van Sy street, Ward 1, Tan Binh district, Ho Chi Minh city, Vietnam. 1 Email: dienchaunguyen@gmail.com; 2 Email: thanhluan.vittep@gmail.com Recived: 15 August 2016; Accepted for publication: 10 November 2016 ABSTRACT The experiment was conducted by using ozone and graphite electrodes to treat wastewater from industrial fried chicken re-processing peocesses with COD value ranges of 1600 - 2000 mgO 2 /L. A chamber of 20 liters was used in this study. The chamber height was 1 meter (the high response of 50-60 cm) in order to increase the diffusion of ozone into the wastewater. The study results showed that the amount of ozone needed for the reaction is 300 mg/h with COD removal efficiency of 40 % during reaction time of 45-60 minutes.The rate of BOD/COD increased within 1.55 - 1.80 times as compared with the BOD/COD rate of the initial wastewater. The experiments also showed that the COD removal efficiency of wastewater was not affected much by the pH value of the wastewater. Keywords: re-processing wastewater, industrial fried chicken, BOD, COD, graphite electrode. 1. INTRODUCTION To treat wastewater from industrial fried chicken pre-processing processes by direct application of biological methods is not feasible due to the inhibition of biological compounds in spices. To treat this wastewater effectively by biological method, it is necessary to use a pre- treatment method in order to reduce or eliminate effect of spices in wastewater. A method to eliminate biological inhibition compounds is advanced oxidation procesess. Some studies reported the oxidation methods combined with biological methods (plant, activated sludge, etc.) for wastewater treatment. Olive mill wastewater is the kind of wastewater with a very high organic concentration, persistent in nature and contains many toxic compounds with microorganisms. The application of advanced oxidation processes as a pre-treatment step for