Water management of fish ponds

摘要

PCT No. PCT/EP93/03226 Sec. 371 Date Jul. 7, 1995 Sec. 102(e) Date Jul. 7, 1995 PCT Filed Nov. 18, 1993 PCT Pub. No. WO94/10833 PCT Pub. Date May 26, 1994There is provided a system for water quality control and improvement in intensive fish culture systems. The aim of the water treatment is to reduce the content of inorganic nitrogen and of organic matter. The system comprises a fish pond, a settling pond, a fluidized bed reactor and a trickling filter. The system according to the invention can be an essentially closed one, except for periodic water replenishment. It is suited for ponds with sweet or salt water.