Which of the following in sewage treatment removes suspended solids?

Which of the following in sewage treatement removes suspended solids.

Which of the following in sewage treatement removes suspended solids.

Which of the following in sewage treatement removes suspended solids.

Which of the following in sewage treatement removes suspended solids.

Which of the following sewage treatment removes suspended solids?

Which of the following statement about sewage treatment is false?

Which of the following is True/false Secondary treatment of sewage waste also called Biological treatment

Which of the following is True/false Secondary treatment of sewage waste also called Biological treatment