Flowchart /Diagram for waste water treatment plant (WWTP) according to NCERT?
This diagram will help you solve your question but just in short wastewater goes to bar screen to remove large objects then goes to grit and sand removal tank where grit , sand and pebbles settle down . This water goes to clarification tank where sludge is removed . This clarified water goes to aeration tank where aerobic bacteria consume the human waste , soap etc.then water is removed from the top .this water goes to chlorination tank where chlorine is added to kill remaining bacteria , germs etc . Now this water is fit for drinking.