Question

which choice below best shows the sequence of events in the treatment of wastewater? 1. filter to remove large solids like paper. 2. settle to separate organic solids. 3. filter to remove smaller particles. 4. remove bacteria using bio - organics. 5. disinfect. 1. filter to remove large solids like paper. 2. settle to separate organic solids. 3. filter to remove smaller particles. 4. disinfect. 1. filter to remove small solids. 2. settle to separate organic solids. 3. filter to remove large solids like paper.

Explanation:

In wastewater treatment, first large - solids like paper are removed by filtration. Then settling is done to separate organic solids. After that, smaller particles are filtered out. Finally, disinfection is carried out to remove bacteria and other pathogens. Removing bacteria using bio - organisms is not a standard step in the basic sequence of wastewater treatment processes described here.

Answer:

1. Filter to remove large solids like paper.
2. Settle to separate organic solids.
3. Filter to remove smaller particles.
4. Disinfect.