Bioreactor Water Heating

Three hands-on STEM renewable energy activities lead learners through the concepts of solar and biomass heating and water pumping to design a water pumping system that uses multiple technologies to avoid water freezing in winter. They design a passive solar water heater using a milk jug and then measure the temperature change in the water over time. The second installment challenges pupils to create bioreactors that collect energy released from compost. To complete the unit, pupils first investigate water pumps and then design a water circulation system using solar energy. A bioreactor in the system takes energy from compost and helps heat water.