Fish in a tank (IMAGE) University of Gothenburg Caption Fish raised in closed-containment farms can be coupled to plant cutltivation through a production model known as aquaponics. The researchers have now established a system to treat the hitherto ignored solid waste produced by these fish while also generating biogas from fish waste. Credit Victor Lobanov Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.