Testing water quality (IMAGE) Purdue University Caption Food Science graduate student Juan Velasquez Domingo takes a sample of wastewater being cleaned with algae to test the water quality. Velasquez is part of a project to create a pilot-scale aquaponic system using algae for wastewater clean-up. The surplus algae will also be harvested and processed into value-added products. Credit Purdue Agricultural Communications/Tom Campbell Usage Restrictions News organizations may use this image in reports about the work of Purdue University’s Jen-Yi Huang, Halis Simsek and their colleagues. 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.