Municipal water produced in industrial production units

Since the right capacity of an wastewater treatment fabricated package is estimated based on the number of people whose produced water is sent for treatment and the amount of wastewater produced by each person, I am wondering how much municipal wastewater is produced in a production plant (water desalination plant for instance ) per shift (12 hour shift for instance) per person?

It seems it is different from the household base. Thanks in advanced