In the trickling filter process, the _________ build up and they block the passage
a) Sludge formed b) Dissolved impurities c) Dissolved solids d) Micro organisms
a) Sludge formed b) Dissolved impurities c) Dissolved solids d) Micro organisms
a) Increase efficiency b) Decrease efficiency c) Increase pressure d) Decrease dissolved oxygen
a) Fast b) Slow c) Very fast d) Moderate
a) Chlorine b) Bromine c) Fluorine d) Iodine
a) Oxygen and water b) Carbondioxide and water c) Nitrogen and water d) Chlorine an water