A physical characteristic describing the appearance of water not to be confused with turbidity. Color is harmless and is the color after suspended particles have been removed. A comminutor is a filtering type devise that is installed on the intake side of sewage facilities, which uses a series of disks to shred objects into smaller pieces to prevent damage to pumps. The DO level in wastewater treatment is crucial to the success of BOD removal and proper sludge formation. DO can be added by mechanical mixing and air pumps.
Plants can decrease DO levels by reversing aeration methods.
DO refers to the amount of dissolved oxygen in water expressed in milligrams per liter. Detention time refers specifically to wastewater and is the actual time a portion of influent or effluent is kept in the plant per unit volume. Dilution is the mixing of a strong concentration of solution with water or other liquid to produce a weak concentration. Dilution rates refer to the amount of effluent mixed with the amount of nonpotable influent especially in trickling filter facilities. One of the main goals in treating wastewater is to eliminate the spread of waterborne disease.