CLASS B WASTEWATER TEXTBOOK Questions with correct answers

If wastewater contains dissolved oxygen, the biological breakdown will reduce sulfate to sulfide. T or F CORRECT ANSWER False At a pH below 5, all sulfide is present in the gaseous h2s form and most of it can be released from wastewater. T or F CORRECT ANSWER True In order to control odors effectively, the operator should know where odors originate and the cause. T or F CORRECT ANSWER True Chlorination is one of the oldest and least effective methods of controlling odors. T or F CORRECT ANSWER False- it is one of the oldest & most effective The reaction of chlorine with certain chemicals can cause a more odorous gas. T or F CORRECT ANSWER True Decreasing the pH of wastewater is an effective odor control method for hydrogen sulfide. T or F CORRECT ANSWER False- Increasing is an effective method Odor control towers must have a biomass established on the filter media in order to remove odors.