Recycle the waste water

1.How they clean wastewater. 2. how they separate solid, plastic from the wastewater. 3. how many channels waters have to go through (hint:- 3 channels) 4. how many machines need to clean the water. explain every machines, how does it work. 5.how much energy needs to pump the wastewater. 6. how many gallons of wastewater get clean in one cycle. 7. how they store the wastewater.