Which of the following pollutants are generally not removed in a sewage treatment plant?
a) Inorganic suspended solids
b) Dissolved organic solids
c) Oil and grease
d) Dissolved inorganic solids
Which of the following pollutants are generally not removed in a sewage treatment plant?
a) Inorganic suspended solids
b) Dissolved organic solids
c) Oil and grease
d) Dissolved inorganic solids
