Sistema de control automático de plataformas de crecimiento de algas en el espacio
Tutor / director / evaluatorCasas Piedrafita, Óscar
Document typeBachelor thesis
Rights accessRestricted access - author's decision
This final degree work has been done with the aim to study and build a system capable of automatically controlling algae growth platforms. It is a land simulation of an ECLSS "Environmental Control and Life Support System". The study of algae as a species to be incorporated into closed bioregenerative systems for space missions is interesting. Because thanks to their photosynthetic and filtering properties they can generate food and other vital substances to the space crew, in addition to regenerating waste. This saves replenishments and allows the extension of the expeditions beyond Earth. In order to ensure proper operation of the cycle in a closed environment and to optimize the growth of algae, an automatic control system capable of measuring different variables of algae tanks and actuation on them is required. This project has worked both in the development of hardware and software. The circuits that make up the system with different devices, sensors and actuators have been created. Also application has been designed so that the user can interact with the system to consult and send actuation orders to control the algae tanks. The designed system has been tested in the laboratories of the ESAB "Escuela Superior de Agricultura de Barcelona". Measuring both static and dynamic of the temperature, the dissolved oxygen concentration, the pH level and the level of algae tanks has been done successfully. We have also tested the various actuators such as lights and peristaltic pumps that allow creating an IMTA-RAS "Integrated Multi Trophic Aquaculture in a Recirculating Aquaculture System" between fishes and macroalgae, fully controlled to perform experiments and optimize the growth of algae. The system is designed to have the control of two of the laboratory tanks. It can be adapted to future additions or changes, because it has made easily scalable and editable.