What is the detention time considered for aerated grit chamber?

Usually while designing what is the range of the width of the aerated grit chamber assumed?

What is the cleaning period for manual grit chambers?

Which of the following is true for screens and comminutors?

What is the maximum allowable head loss for a manual coarse screen?

Usually while designing what is the range of depth of the aerated grit chamber assumed?

Which of these screens have a very large footprint?

Which of these screens can handle very large particles?