Ngành công nghiệp thủy sản bao gồm chủ yếu của nhiều nhà máy chế biến nhỏ, với một số nhà máy lớn hơn nằm gần trung tâm công nghiệp và dân cư. Nhiều loại hải sản được chế biến, chẳng hạn như động vật thân mềm (sò, trai, sò điệp), động vật giáp xác (cua, tôm hùm), các loài cá nước mặn, và các loài cá nước ngọt. Như trong hầu hết các ngành công nghiệp chế biến, chế biến hải sản hoạt động sản xuất nước thải có chứa các chất gây ô nhiễm đáng kể trong các hình. | 2 Seafood Processing Wastewater Treatment Joo-Hwa Tay and Kuan-Yeow Show Nanyang Technological University Singapore Yung-Tse Hung Cleveland State University Cleveland Ohio . INTRODUCTION The seafood industry consists primarily of many small processing plants with a number of larger plants located near industry and population centers. Numerous types of seafood are processed such as mollusks oysters clams scallops crustaceans crabs and lobsters saltwater fishes and freshwater fishes. As in most processing industries seafood-processing operations produce wastewater containing substantial contaminants in soluble colloidal and particulate forms. The degree of the contamination depends on the particular operation it may be small . washing operations mild . fish filleting or heavy . blood water drained from fish storage tanks . Wastewater from seafood-processing operations can be very high in biochemical oxygen demand BOD fat oil and grease FOG and nitrogen content. Literature data for seafood processing operations showed a BOD production of kg of BOD per tonne of product 1 . White fish filleting processes typically produce kg of BOD for every tonne of product. BOD is derived mainly from the butchering process and general cleaning and nitrogen originates predominantly from blood in the wastewater stream 1 . It is difficult to generalize the magnitude of the problem created by these wastewater streams as the impact depends on the strength of the effluent the rate of discharge and the assimilatory capacity of the receiving water body. Nevertheless key pollution parameters must be taken into account when determining the characteristics of a wastewater and evaluating the efficiency of a wastewater treatment system. Section discusses the parameters involved in the characterization of the seafood processing wastewater. Pretreatment and primary treatment for seafood processing wastewater are presented in Section . These are the simplest
