An Integrated Water Treatment System for Recirculation Aquaculture

摘要

Over the past 10 years, aquaculture has become a fast growing industry in food production. Its importance in supply of animal proteins to human beings all over the world has become more and more obvious (FAO, 2007). In 2005, the aquaculture productionreached 48.8 million tons, providing more than 34.1% of fisheries production. Of the world total, China is reported to account for 69.6 percent of the total quantity and 51.2 percent of the total value of aquaculture production (FAO, 2007). It is expected to increase in the future because fisheries production from natural sources is becoming limited (Boyd, 2003). At the same time, the impacts of aquaculture on the environment and natural resources need to be controlled because of the large amount of water that aquicultural production uses and the effluent that it discharges into the environment (Westers, 1991; Bergheim et al., 1993; Chen et al., 1997; Idaho DEQ, 1998; Wang, 2003). Presently, intensive aquacultural production with recirculating water systems show a great potential for meeting the requirements of environmental protection and resource management (Pan et al., 2007). A stable and effective water treatment system is the key to successful operation of circulating water aquaculture system.