one develop a system for the market it s called research collating aquaculture so this is to makes use of 100 percent water. reuse water is circulation so it s mentally very friendly because there s no water going through and there s nothing spoiling the environment and we make use of renewable energy in order to reduce c o 2 footprint. in the tunnel on the can and side of the lake is already in place the water is filtered using what s known as membrane bio reactor technology. in uganda has been using recycled water for the last 18 months the used water is pumped into our time from there it flows into this busines which contain stones and sun that help clean the water. wants to use