Texas Wastewater Class B Practice Exam

What can be added to the collection system to help mitigate bad odors?

1. Hydrochloric acid

2. Chlorine or hydrogen peroxide

3. Neutralizing agents

4. Biological detergents

The correct answer is: Chlorine or hydrogen peroxide

To effectively mitigate bad odors in a wastewater collection system, adding chlorine or hydrogen peroxide can be beneficial. These substances function as oxidizing agents, which can help reduce the concentration of hydrogen sulfide and other odorous compounds typically present in wastewater. The oxidation process neutralizes the sulfides, leading to a reduction in unpleasant smells. This approach is particularly useful during the treatment process, as it aids in managing odors generated by anaerobic conditions within the collection system. The use of chlorine or hydrogen peroxide can help maintain a more stable system, improving overall air quality in and around the wastewater facilities. Other options included do not address the root cause of odor mitigation as effectively. For instance, hydrochloric acid can create additional safety concerns and may not effectively neutralize odors. Neutralizing agents can help to mask odors, but they may not eliminate the underlying causes. Biological detergents are potentially beneficial for cleaning purposes but are not primarily designed for odor control.