Abstract:

To provide a detailed computational mode on the relationship between the area of fish pond and purification pond, and realize the hierarchical use of nitrogen/phosphorus, and the recirculation use of water resource, In this paper, referred to the absorption ability of aquatic plants to waste water, the ratio of produce to discharge of the pollutants in fish pond, and the water quality management in freshwater aquaculture, a mode was provided to explain that the construction of the water circulation pond aquaculture system was feasible. Taken the nitrogen in grass carp aquaculture for example, the results computed by this mode, showed that, the basic area ratio between fish pond and purification pond was 15:1; in the term of the absorption ability of aquatic plants to waste water, the area ratio was 7.5:1; and in the term of the ratio of produce to discharge of the pollutants in fish pond, the area ratio was 27.8:1. Different aquaculture yield and variety would influence that ratio. It was feasible to reduce the area of purification pond by increase the absorption ability of aquatic plants to waste water. This computational model could also reduce the cost to construction of the model, and realize the balance of the ecological benefit and the economic benefit.