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Combination of moving bed biofilter and activated sludge process to remove organic loading from seafood wastewater

The combination between moving bed biofilter (MBF) and conventional activated sludge (CAS) process was conducted to treat seafood processing wastewater with high organic concentration in Ha Long canned food factory. The high automatic operation of pilot was designed with treatment volume of 2 m3 /day. | Vietnam Journal of Science and Technology 55 (6) (2017) 734-742 DOI: 10.15625/2525-2518/55/6/8316 COMBINATION OF MOVING BED BIOFILTER AND ACTIVATED SLUDGE PROCESS TO REMOVE ORGANIC LOADING FROM SEAFOOD WASTEWATER Do Van Manh1, 2, *, Truong Thi Hoa1, Nguyen Viet Thoan1, Do Tuan Anh1, Nguyen Tuan Minh2, Le Minh Tuan2 1 Da Nang Environmental Technology Center, Tran Dai Nghia, Ngu Hanh Son, Da Nang 2 Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi ∗ Email: dovanmanh@yahoo.com Received: 10 May 2016; Accepted for publication: 30 September 2017 Abstract. The combination between moving bed biofilter (MBF) and conventional activated sludge (CAS) process was conducted to treat seafood processing wastewater with high organic concentration in Ha Long canned food factory. The high automatic operation of pilot was designed with treatment volume of 2 m3/day. The capacity of organic removal loading was investigated in the range of 1; 1.5; 2; 2.5 and 5 kg BOD5/m3.d, respectively. The obtained results indicate that the organic (BOD5) removal efficiencies of the studied pilot and the two-stagesactivated sludge being used in the factory are 90 – 95 % and 45 – 50 %, respectively as at the same organic loading. This highly application study, therefore, suggests that the combination of moving bed biofilter with conventional activated sludge process tends to be a promising technology for wastewater treatment of seafood processing industry in Vietnam. Keywords: moving bed biofilter, seafood processing wastewater treatment, activated sludge. 1. INTRODUCTION The sea food processing industry (SFPI) thrives in countries with large surface water. The preliminary processing and processing activities generate a large amount of wastewater (catfish: 5 - 7 m3/tone, frozen shrimp: 4 - 6 m3/tone, and surimi: 20 - 25 m3/tone; and mixed frozen seafood: 4 - 6 m3/tone) with unstable flow based on seafood seasonality and the .