Method for improving conditions in closed circuit fish farming

US6722314B1 · kind B1 · utility

Assignee

• L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventors

• Pascal Crisinel · Guyancourt, FR
• Lucie Prost · Viroflay, FR
• Lionel Bon · Saint-Nazaire, FR

Key dates

• Filing date: Feb 25, 2002
• Grant date: Apr 20, 2004
• Expiry date: Feb 25, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01K63/042
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for improving conditions in closed circuit seafood and fish farming, comprising the following steps: a) at least part of the water from at least one of the rearing ponds (1) is recycled, whereby said water is treated one or more times and purified (3, 4, 5) before it is re-injected into said pond; b) the water recycled during the recycling path indicated in step a) is mixed with a new supply of water (10); c) all or part of the recycled water (21, 22) undergoes ozonization and, wherever applicable, the new supply of water (20) also undergoes ozonization either partially or in full before it is mixed with the re-circulated water.